Subject to Completion Preliminary Term Sheet dated September 29, 2021 Filed Pursuant to Rule 424(b)(2)
Registration Statement No. 333-234425
(To Prospectus dated  December 31, 2019,
Prospectus Supplement dated  December 31, 2019 and Product Supplement EQUITY SUN-1 dated December 11, 2020)

Units $10 principal amount per unit CUSIP No.	Pricing Date* Settlement Date* Maturity Date*	October  , 2021 November  , 2021 October  , 2024
	*Subject to change based on the actual date the notes are priced for initial sale to the public (the “pricing date”)
BofA Finance LLC Autocallable Market-Linked Step Up Notes Linked to the iShares® Global Clean Energy ETF Fully and Unconditionally Guaranteed by Bank of America Corporation ■    Maturity of approximately three years, if not called prior to maturity ■    Automatic call of the notes per unit at $10 plus the applicable Call Premium ([$0.85 to $0.95] on the first Observation Date and [$1.70 to $1.90] on the final Observation Date) if the Underlying Fund is flat or increases above 100% of the Starting Value on the relevant Observation Date ■    The Observation Dates will occur approximately one year and two yearsafter the pricing date ■    If the notes are not called, at maturity: ■    a return of 30% if the Underlying Fund is flat or increases up to the Step Up Value ■    a return equal to the percentage increase in the Underlying Fund if the Underlying Fund increases above the Step Up Value ■    1-to-1 downside exposure to decreases in the Underlying Fund, with up to 100.00% of your principal at risk ■    All payments are subject to the credit risk of BofA Finance LLC, as issuer of the notes, and the credit risk of Bank of America Corporation, as guarantor of the notes ■    No periodic interest payments ■    In addition to the underwriting discount set forth below, the notes include a hedging-related charge of $0.05 per unit. See “Structuring the Notes” ■    Limited secondary market liquidity, with no exchange listing

The notes are being issued by BofA Finance LLC (“BofA Finance”) and are fully and unconditionally guaranteed by Bank of America Corporation (“BAC”). There are important differences between the notes and a conventional debt security, including different investment risks and certain additional costs. See “Risk Factors” and “Additional Risk Factors”beginning on page TS-9 of this term sheet and “Risk Factors” beginning on page PS-8 of the accompanying product supplement, page S-4 of the accompanying Series A MTN prospectus supplement and page 7 of the accompanying prospectus.

The initial estimated value of the notes as of the pricing date is expected to be between $9.30and $9.86per unit, which is less than the public offering price listed below. See “Summary” on the following page, “Risk Factors” beginning on page TS-9 of this term sheet and “Structuring the Notes” on page TS-17 of this term sheet for additional information. The actual value of your notes at any time will reflect many factors and cannot be predicted with accuracy.

_________________________

None of the Securities and Exchange Commission (the “SEC”), any state securities commission, or any other regulatory body has approved or disapproved of these securities or determined if this Note Prospectus (as defined below) is truthful or complete. Any representation to the contrary is a criminal offense.

_________________________

	Per Unit	Total
Public offering price(1) …………………………….	$10.00	$
Underwriting discount(1)	$0.20	$
Proceeds, before expenses, to BofA Finance	$9.80	$

(1)    For any purchase of 300,000 units or more in a single transaction by an individual investor or in combined transactions with the investor’s household in this offering, the public offering price and the underwriting discount will be $9.95 per unit and $0.15 per unit, respectively. See “Supplement to the Plan of Distribution; Conflicts of Interest” below.

The notes and the related guarantee:

Are Not FDIC Insured Are Not Bank Guaranteed May Lose Value

BofA Securities

October     , 2021

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Summary

The Autocallable Market-Linked Step Up Notes Linked to the iShares^® Global Clean Energy ETF, due September  , 2024(the “notes”) are our senior unsecured debt securities. Payments on the notes are fully and unconditionally guaranteed by BAC. The notes and the related guarantee are not insured by the Federal Deposit Insurance Corporation or secured by collateral. The notes will rank equally in right of payment with all of BofA Finance’s other unsecured and unsubordinated obligations, and the related guarantee will rank equally in right of payment with all of BAC’s other unsecured and unsubordinated obligations, in each case except obligations that are subject to any priorities or preferences by law. Any payments due on the notes, including any repayment of principal, will be subject to the credit risk of BofA Finance, as issuer, and BAC, as guarantor.The notes will be automatically called at the applicable Call Amount if the Observation Level of the Market Measure, which is the iShares^® Global Clean Energy ETF (the “Underlying Fund”), is equal to or greater than the Call Level on the applicable Observation Date. If the notes are not called, at maturity, the notes provide you with a Step Up Payment if the Ending Value of the Underlying Fund is equal to or greater than its Starting Value, but is not greater than the Step Up Value. If the Ending Value is greater than the Step Up Value, you will participate on a 1-for-1 basis in the increase in the price of the Underlying Fund above the Starting Value.If the Ending Value is less than the Threshold Value, you will lose a portion, which could be significant, of the principal amount of your notes. Any payments on the notes, will be calculated based on the $10 principal amount per unit and will depend on the performance of the Underlying Fund, subject to our and BAC’s credit risk. See “Terms of the Notes” below.

The economic terms of the notes (including the Call Premiums and Call Amounts) are based on BAC’s internal funding rate, which is the rate it would pay to borrow funds through the issuance of market-linked notes and the economic terms of certain related hedging arrangements. BAC’s internal funding rate is typically lower than the rate it would pay when it issues conventional fixed or floating rate debt securities.  This difference in funding rate, as well as the underwriting discount and the hedging related charge described below, will reduce the economic terms of the notes to you and the initial estimated value of the notes on the pricing date. Due to these factors, the public offering price you pay to purchase the notes will be greater than the initial estimated value of the notes.  

On the cover page of this term sheet, we have provided the initial estimated value rangefor the notes.  This initial estimated value range was determined based on our, BAC’s and our other affiliates’ pricing models, which take into consideration BAC’sinternal funding rate and the market prices for the hedging arrangements related to the notes.  The notes are subject to an automatic call, and the initial estimated value is based on an assumed tenor of the notes.  The initial estimated value of the notes calculated on the pricing date will be set forth in the final term sheet made available to investors in the notes. For more information about the initial estimated value and the structuring of the notes, see “Structuring the Notes” on page TS-17.

Terms of the Notes
Issuer: Guarantor:	BofA Finance LLC (“BofA Finance”) Bank ofAmericaCorporation (“BAC”)	Call Settlement Dates:	Approximately the fifth business day following the applicable Observation Date, subject to postponement if the related Observation Date is postponed, as described on page PS-27 of the accompanying product supplement.
Principal Amount:	$10.00 per unit	Call Premiums:	[$0.85 to $0.95] per unit if called on the first Observation Date (which represents a return of [8.50% to 9.50%] over the principal amount) and [$1.70 to $1.90] per unit if called on the final Observation Date (which represents a return of [17.00% to 19.00%] over the principal amount). The actual Call Premiums will be determined on the pricing date.
Term:	Approximately three years, if not called	Ending Value:	The Closing Market Price of the Market Measure on the scheduled calculation day, multiplied by its Price Multiplier, as determined by the calculation agent. The calculation dayis subject to postponement in the event of Market Disruption Events, as described on page PS-29 of the accompanying product supplement.
Market Measure:	The iShares® Global Clean Energy ETF (Bloomberg symbol: “ICLN”)	Price Multiplier	1, subject to adjustment for certain events relating to the Market Measure, as described beginning on page PS-33 of the accompanying product supplement.
Starting Value:	The Closing Market Price of the Market Measureon the pricing date	Step Up Value:	130% of the Starting Value.
Observation Level:	The Closing Market Price of the Market Measure on the applicable Observation Date, multiplied by its Price Multiplier, as determined by the calculation agent.	Step Up Payment:	$3.00 per unit, which represents a return of 30% over the principal amount.
Observation Dates:	On or about November  , 2022 and October  , 2023, subject to postponement in the event of Market Disruption Events, as described on page PS-27 of the accompanyingproduct supplement.	Threshold Value:	100% of the Starting Value.
Call Level:	100% of the Starting Value	Calculation Day:	Approximately the fifth scheduled Market Measure Business Day immediately preceding the maturity date.
Call Amounts (per Unit):	[$10.85 to $10.95] if called on the first Observation Date and [$11.70 to $11.90] if called on the final Observation Date.	Fees and Charges:	The underwriting discount of $0.20 per unit listed on the cover page and the hedging related charge of $0.05 per unit described in “Structuring the Notes” on page TS-17.

Autocallable Market-Linked Step Up Notes TS-2

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

	The actual Call Amounts will be determined on the pricing date.
Calculation Agent:	BofA Securities, Inc. (“BofAS”).

Autocallable Market-Linked Step Up Notes TS-3

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Determining Payment on the Notes

Automatic Call Provision

The notes will be called automatically on an Observation Date if the Observation Level on that Observation Date is equal to or greater than the Call Level. If the notes are called, you will receive $10 per unit plus the applicable Call Premium.

Redemption Amount Determination

If the notes are not automatically called, on the maturity date, you will receive a cash payment per unit determined as follows:

Autocallable Market-Linked Step Up Notes TS-4

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

The terms and risks of the notes are contained in this term sheet and in the following:

■    Product supplement EQUITY SUN-1 dated December 11, 2020:
https://www.sec.gov/Archives/edgar/data/70858/000119312520315983/d27083d424b5.htm

■    Series A MTN prospectus supplement dated December 31, 2019 and prospectus dated December 31, 2019:
https://www.sec.gov/Archives/edgar/data/70858/000119312519326462/d859470d424b3.htm

These documents (together, the “Note Prospectus”) have been filed as part of a registration statement with the SEC, which may, without cost, be accessed on the SEC website at www.sec.gov or obtained from Merrill Lynch, Pierce, Fenner & Smith Incorporated (“MLPF&S”) or BofAS by calling 1-800-294-1322.

Before you invest, you should read the Note Prospectus, including this term sheet, for information about us, BAC and this offering.  Any prior or contemporaneous oral statements and any other written materials you may have received are superseded by the Note Prospectus. Certainterms used but not defined in this term sheet have the meanings set forth in the accompanying product supplement.  Unless otherwise indicated or unless the context requires otherwise, all references in this document to “we,” “us,” “our,” or similar references are to BofA Finance, and not to BAC.

Investor Considerations

You may wish to consider an investment in the notes if:

The notes may not be an appropriate investment for you if:

■    You are willing to receive a return on your investment capped at the return represented by the applicable Call Premium if the Observation Level is equal to or greater than the Call Level. ■    You anticipate that the notes will be automatically called or the Ending Value will not be less than the Starting Value. ■    You are willing to risk a loss of principal and return if the notes are not automatically called and the Underlying Fund decreases from the Starting Value to an Ending Value that is below the Threshold Value. ■    You are willing to forgo the interest payments that are paid on conventional interest bearing debt securities. ■    You are willing to forgo dividends or other benefits of owning the shares of the Underlying Fund or the securities held by the Underlying Fund. ■    You are willing to accept a limited or no market for sales prior to maturity, and understand that the market prices for the notes, if any, will be affected by various factors, including our and BAC’s actual and perceived creditworthiness, BAC’s internal funding rate and fees and charges on the notes. ■    You are willing to assume our credit risk, as issuer of the notes, and BAC’s credit risk, as guarantor of the notes,for all payments under the notes, including the Call Amount or the Redemption Amount, as applicable.

■    You want to hold your notes for the full term. ■    You believe that the notes will not be automatically called and the Underlying Fund will decrease from the Starting Value to the Ending Value. ■    You seek principal repayment or preservation of capital. ■    You seek interest payments or other current income on your investment. ■    You want to receive dividends or other distributions paid on the shares of the Underlying Fund or the securities held by the Underlying Fund. ■    You seek an investment for which there will be a liquid secondary market. ■    You are unwilling or are unable to take market risk on the notes or to take our credit risk as issuer of the notes or to take BAC's credit risk, as guarantor of the notes.

We urge you to consult your investment, legal, tax, accounting, and other advisors before you invest in the notes.

Autocallable Market-Linked Step Up Notes TS-5

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Hypothetical Payout Profile and Examples of Payments at Maturity

The graph below is based on hypothetical numbers and values. The graph below shows a payout profile at maturity, which would only apply if the notes are not called on any Observation Date.

Autocallable Market-Linked Step Up Notes This graph reflects the returns on the notes, based on the Threshold Value of 100% of the Starting Value, the Step Up Payment of $3.00 per unit and the Step Up Value of 130% of the Starting Value. The green line reflects the returns on the notes, while the dotted gray line reflects the returns of a direct investment in the Underlying Fund, excluding dividends. This graph has been prepared for purposes of illustration only.

The following table and examples are for purposes of illustration only.  They are based on hypothetical values and show hypothetical returns on the notes, assuming the notes are not called on any Observation Date. They illustrate the calculation of the Redemption Amount and total rate of return based on a hypothetical Starting Value of 100, a Threshold Value of 100, a Step Up Value of 130, the Step Up Payment of $3.00 per unit and a range of hypothetical Ending Values. The actual amount you receive and the resulting total rate of return will depend on the actual Starting Value, Threshold Value, Ending Value, Step Up Value, whether the notes are called on an Observation Date, and whether you hold the notes until maturity. The following examples do not take into account any tax consequences from investing in the notes.

For recent actual levels of the Market Measure, see “The Underlying Fund” section below. The Underlying Fund is a price return index and as such the Ending Value will not include any income generated by dividends paid on the Underlying Fund or thesecurities held by the Underlying Fund, which you would otherwise be entitled to receive if you invested in those securities directly. In addition, all payments on the notes are subject to issuer and guarantor credit risk.

Autocallable Market-Linked Step Up Notes TS-6

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Ending Value	Percentage Change from the Starting Value to the Ending Value	Redemption Amount per Unit	Total Rate of Return on the Notes
0.00	-100.00%	$0.00	-100.00%
50.00	-50.00%	$5.00	-50.00%
80.00	-20.00%	$8.00	-20.00%
90.00	-10.00%	$9.00	-10.00%
94.00	-6.00%	$9.40	-6.00%
97.00	-3.00%	$9.70	-3.00%
100.00(1)(2)	0.00%	$13.00(3)	30.00%
102.00	2.00%	$13.00	30.00%
105.00	5.00%	$13.00	30.00%
110.00	10.00%	$13.00	30.00%
120.00	20.00%	$13.00	30.00%
130.00(4)	30.00%	$13.00	30.00%
132.00	32.00%	$13.20	32.00%
140.00	40.00%	$14.00	40.00%
150.00	50.00%	$15.00	50.00%
160.00	60.00%	$16.00	60.00%

(1)    The hypothetical Starting Value of 100 used in these examples has been chosen for illustrative purposes only, and does not represent a likely actual Starting Value for the Market Measure.

(2)    This is the hypothetical Threshold Value.

(3)    This amount represents the sum of the principal amount and the Step Up Payment of $3.00.

(4)    This is the hypothetical Step Up Value.

Autocallable Market-Linked Step Up Notes TS-7

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Redemption Amount Calculation Examples

Example 1
The Ending Value is 90.00, or 90.00% of the Starting Value:
Starting Value:            100.00
Threshold Value:100.00
Ending Value:90.00
	Redemption Amount per unit

Example 2
The Ending Value is 110.00, or 110.00% of the Starting Value:
Starting Value:         100.00
Step Up Value:         130.00
Ending Value:           110.00
	Redemption Amount per unit, the principal amount plus the Step Up Payment, since the Ending Value is equal to or greater than the Starting Value, but less than the Step Up Value.

Example 3
The Ending Value is 132.00, or 132.00% of the Starting Value:
Starting Value:         100.00
Step Up Value:            130.00
Ending Value:        132.00
	Redemption Amount per unit

Autocallable Market-Linked Step Up Notes TS-8

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Risk Factors

There are important differences between the notes and a conventional debt security.  An investment in the notes involves significant risks, including those listed below. You should carefully review the more detailed explanation of risks relating to the notes in the “Risk Factors” sections beginning on page PS-8  of the accompanying product supplement, page S-5 of the Series A MTN prospectus supplement, and page 7 of the prospectus identified above. We also urge you to consult your investment, legal, tax, accounting, and other advisors before you invest in the notes.

Structure-related Risks 

■    If the notes are not automatically called, depending on the performance of the Underlying Fund as measured shortly before the maturity date, your investment may result in a loss; there is no guaranteed return of principal.

■    Your return on the notes may be less than the yield you could earn by owning a conventional fixed or floating rate debt security of comparable maturity.

■    Payments on the notes are subject to our credit risk, and the credit risk of BAC, and any actual or perceived changes in our or BAC’s creditworthiness are expected to affect the value of the notes. If we and BAC become insolvent or are unable to pay our respective obligations, you may lose your entire investment.

■    If the notes are called, your investment return is limited to the return represented by the applicable Call Premium.

■    Your investment return may be less than a comparable investment directly in the Underlying Fund or the securitiesheld by the Underlying Fund.

■    We are a finance subsidiary and, as such, have no independent assets, operations or revenues.

■    BAC’s obligations under its guarantee of the notes will be structurally subordinated to liabilities of its subsidiaries.

■    The notes issued by us will not have the benefit of any cross-default or cross-acceleration with other indebtedness of BofA Finance or BAC; events of bankruptcy or insolvency or resolution proceedings relating to BAC and covenant breach by BAC will not constitute an event of default with respect to the notes.

Valuation- and Market-related Risks 

■    The initial estimated value of the notes considers certain assumptions and variables and relies in part on certain forecasts about future events, which may prove to be incorrect. The initial estimated value of the notes is an estimate only, determined as of a particular point in time by reference to our and our affiliates’ pricing models. These pricing models consider certain assumptions and variables,including our credit spreads and those of BAC, BAC’s internal funding rate on the pricing date, mid-market terms on hedging transactions, expectations on interest rates and volatility, price-sensitivity analysis, and the expected term of the notes.  These pricing models rely in part on certain forecasts about future events, which may prove to be incorrect.

■    The public offering price you pay for the notes will exceed the initial estimated value. If you attempt to sell the notes prior to maturity, their market value may be lower than the price you paid for them and lower than the initial estimated value.  This is due to, among other things, changes in the price of the Underlying Fund, changes inBAC’s internal funding rate, and the inclusion in the public offering price of the underwriting discount and the hedging related charge, all as further described in “Structuring the Notes” on page TS-17. These factors, together with various credit, market and economic factors over the term of the notes, are expected to reduce the price at which you may be able to sell the notes in any secondary market and will affect the value of the notes in complex and unpredictable ways.

■    The initial estimated value does not represent a minimum or maximum price at which we, BAC, MLPF&S, BofAS or any of our otheraffiliates would be willing to purchase your notes in any secondary market (if any exists) at any time. The value of your notes at any time after issuance will vary based on many factors that cannot be predicted with accuracy, including the performance of the Underlying Fund, our and BAC’s creditworthiness and changes in market conditions.

■    A trading market is not expected to develop for the notes. None of us, BAC, MLPF&S, or BofAS is obligated to make a market for, or to repurchase, the notes. There is no assurance that any party will be willing to purchase your notes at any price in any secondary market.

Conflict-related Risks 

■    BAC and its affiliates’ hedging and trading activities (including trades in the Underlying Fund or in shares of companies included in the Underlying Fund) and any hedging and trading activities BAC or its affiliates engage in that are not for your account or on your behalf, may affect the market value and return of the notes and may create conflicts of interest with you.  

■    There may be potential conflicts of interest involving the calculation agent, which is an affiliate of ours.  We have the right to appoint and remove the calculation agent.

Market Measure-related Risks 

■    The sponsor and investment advisor of the Underlying Fund may adjust the Underlying Fund in a way that could adversely impact the value of the notes and the amount payable on the notes, and these entities have no obligation to consider your interests.

Autocallable Market-Linked Step Up Notes TS-9

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

■    The sponsor of the Underlying Fund’s underlying index (the “Underlying Index”) may adjust the Underlying Index in a way that affects its level, and has no obligation to consider your interests. You will have no rights of a holder of the Underlying Fund or the securities held  by the Underlying Fund, and you will not be entitled to receive securities or dividends or other distributions by the issuers of those securities. 

■    While BAC and our other affiliates may from time to time own securities of companies included in the Underlying Fund, we, BAC and our other affiliates do not control any company included in the Underlying Fund, and have not verified any disclosure made by any other company.

■    There are liquidity and management risks associated with the Underlying Fund.

■    The performance of the Underlying Fund may not correlate with the performance of its Underlying Index as well as the net asset value per share of the Underlying Fund, especially during periods of market volatility when the liquidity and the market price of shares of the Underlying Fund and/or securities held by the Underlying Fund may be adversely affected, sometimes materially.

■    Risks associated with the Underlying Index or the underlying assets of the Underlying Fund will affect the share price of the Underlying Fund and hence, the value of the notes.

■    The payments on the notes will not be adjusted for all corporate events that could affect the Underlying Fund. See “Description of the Notes—Anti-Dilution and Discontinuance Adjustments Relating to Underlying Funds” beginning on page PS-33 of the accompanying product supplement.

Tax-related Risks

■    The U.S. federal income tax consequences of the notes are uncertain, and may be adverse to a holder of the notes.  See “Summary Tax Consequences” below and “U.S. Federal Income Tax Summary” beginning on page PS-42 of the accompanying product supplement.

Additional Risk Factors

All of the securities held by the Underlying Fund are concentrated in one industry.

All of the securities held by the Underlying Fund are issued by companies in the clean energy industry. As a result, the securities that will determine the performance of the notes are concentrated in one industry. Although an investment in the notes will not give holders any ownership or other direct interests in the securities held by the Underlying Fund, the return on an investment in the notes will be subject to certain risks similar to those associated with direct equity investments in the clean energy industry. The notes may be subject to greater volatility and be more adversely affected by a single positive or negative economic, political or regulatory occurrence affecting this industry than a different investment linked to securities of a more broadly diversified group of issuers. 

The notes will be subject to risks associated with the clean energy industry.

The performance of companies in the clean energy industry are influenced by many complex and unpredictable factors. Clean energy companies may be highly dependent upon government subsidies, contracts with government entities, and the successful development of new and proprietary technologies. In addition, seasonal weather conditions, fluctuations in the supply of and the demand for clean energy products, changes in energy prices, and international political events may cause fluctuations in the performance of clean energy companies and the prices of their securities. The profitability of clean energy companies may also be adversely affected by existing and future laws, regulations, government actions and other legal requirements relating to protection of the environment, health and safety matters and others that may increase the costs of conducting their business or may reduce or delay available business opportunities. Any adverse development in the clean energy industry may have a material adverse effect on the securities held by the Underlying Fund, and as a result, on the value of the notes.

A limited number of securities may affect the level of the Underlying Index, and the Underlying Index is not necessarily representative of the clean energy industry.

As of December 29, 2020, there were 30 securities included in the Underlying Index. As of that day, the top three securities included in the Underlying Index constituted 16.78% of the total weight of the Underlying Index and the top six securities included in the Underlying Index constituted 31.24% of the total weight of the Underlying Index. Because the Underlying Fund attempts to track the performance of the Underlying Index, any reduction in the market price of those securities is likely to have a substantial adverse impact on the price of the Underlying Fund and the value of the notes. 

While the securities included in the Underlying Index are equity securities of companies generally considered to be involved in the clean energy industry, the securities included in the Underlying Index may not follow the price movements of the entire clean energy industry generally. If the securities included in the Underlying Index (and, accordingly, the securities held by the Underlying Fund) decline in value, the Underlying Fund will decline in value even if security prices in the clean energy industry generally increase in value.

Autocallable Market-Linked Step Up Notes TS-10

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

The Underlying Fund

All disclosures contained in this term sheet regarding the Underlying Fund and the Underlying Index, including, without limitation, its make-up, method of calculation, and changes in its components, have been derived from publicly available sources. The information reflects the policies of, and is subject to change by, BlackRock Fund Advisors(“BFA”). The consequences any discontinuance of the Underlying Fund or the Underlying Indexare discussed in the section entitled “Description of the Notes—Anti-Dilution and Discontinuance Adjustments Relating to Underlying Funds—Discontinuance of or Material Change to an Underlying Fund”on page PS-36 of the accompanying product supplement. None of us, BAC, the calculation agent, MLPF&S or BofAS accepts any responsibility for the calculation, maintenance, or publication of the Underlying Fund, the Underlying Index, or any successor fund or index.

The iShares^® Global Clean Energy ETF

The iShares^® Global Clean Energy ETF (the “ICLN”) is an investment portfolio maintained and managed by iShares, Inc. (“iShares”) and advised by BFA. iShares is a registered investment company that consists of numerous separate investment portfolios, including ICLN. The shares of the ICLN are listed and trade on the NASDAQ under the ticker symbol “ICLN.”

Information provided to or filed with the SEC by iShares pursuant to the Securities Act and the Investment Company Act can be located by reference to SEC file numbers 033-97598 and 811-09102, respectively, through the SEC’s website at www.sec.gov.In addition, information may be obtained from other sources including, but not limited to, press releases, newspaper articles and other publicly disseminated documents.We have not made any independent investigation as to the accuracy or completeness of such information.

The S&P Global Clean Energy Index^TM, which is the underlying index of ICLN, is calculated by or on behalf of S&P Dow Jones IndicesLLC (“S&P”). 

Investment Objective and Strategy

The ICLN seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the S&P Global Clean Energy Index^TM. The S&P Global Clean Energy Index^TM was developed by S&P and is designed to track the performance of 30 clean energy-related companies. The ICLN uses a representative sampling strategy to try to track the S&P Global Clean Energy Index^TMand generally will invest at least 90% of its assets in the components of the S&P Global Clean Energy Index^TM. The returns of the ICLN may be affected by certain management fees and other expenses, which are detailed in its prospectus.

The S&P Global Clean Energy Index^TM

The S&P Global Clean Energy Index^TM(the “SPGTCLEN”) was developed by S&P and is calculated, maintained and published byS&P.  The SPGTCLEN is reported by Bloomberg under the ticker symbol “SPGTCLEN.”  The SPGTCLEN is a non-market capitalization-weighted index that is designed to measure the performance of 30of the largest companies in global clean energy related businesses from both developed and emerging markets.

The SPGTCLEN is part of the part of the S&P Thematic Indices series and draws from the S&P^® Global BMI Index.

Eligibility Factors

To be eligible for inclusion in the SPGTCLEN, stocks must have a total market capitalization of greater than or equal to $300 million, an FMC of greater than or equal to $100 million, 3-month average daily value traded of $3 million(or $2 million for current constituents) and must be trading on a developed market exchange.

To be eligible for inclusion in the SPGTCLEN, an eligible stock must have a minimum total market capitalization of US$ 300 million and a minimum float-adjusted market capitalization of US$ 100 million. Eligible stocks must also maintain a 3-month Average Daily Value Traded Liquidity Threshold of US$ 3million (US$ 2 million for current constituents). Eligible stocks must be included in The S&P^® Global BMI Index in order to be considered for inclusion in the SPGTCLEN. Only developed market listings are eligible for stocks domiciled in emerging markets. For more information about the S&P^® Global BMI Index’s constituent selection process, please see “The S&P^® Global BMI Index Constituent Selection” below.

The S&P^® Global BMI Constituent Selection

The S&P^® Global BMI Index is designed to measure global stock market performance. Securities issued by companies domiciled in countries classified as developing or emerging markets are eligible for inclusion in the S&P^® Global BMI Index. The S&P^® Global BMI Index covers all publicly listed equities with float-adjusted market capitalizations of at least $100 million. At the S&P^® Global BMI Index reconstitution, an index constituent is removed if its float-adjusted market capitalization falls below US$ 75 million.

At the annual reconstitution, the liquidity of each stock being considered for inclusion is evaluated using two median daily value traded metrics:

Eligible stocks must have a minimum USD 12 month median value traded ratio (MVTR) to be eligible. The ratio is calculated by taking the USD median daily value traded (MDVT) amount for each of the 12 months preceding the rebalancing reference date, multiplying the monthly amount by the number of days that the stock traded during that month, and then dividing by its end-of- month float-adjusted market capitalization, also calculated in USD. The sum of the 12 monthly values is the MVTR for that stock. If a stock has traded for less than 12 months, the average of the available monthly values is taken and multiplied by 12.

Eligible stocks must have a minimum USD MDVT over the six months prior to the rebalancing reference date to be eligible. If a stock

Autocallable Market-Linked Step Up Notes TS-11

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

has traded for less than six months, the MDVT amount for as long as the stock has been trading is used. The requirements vary based on a stock’s country classification, whether emerging or developed. These requirements are summarized in the following table:

Liquidity Thresholds for Potential Constituents
Region	12-Month MVTR (%)	6-Month MDVT (US$M)
Emerging	10	0.1
Developed	20	0.25

At annual reconstitution, current constituents of the S&P^® Global BMI Index are removed if either of the liquidity metrics fall below the thresholds in the following table:

Liquidity Thresholds for Current Constituents
Region	12-Month MVTR (%)	6-Month MDVT (US$M)
Emerging	7	0.07
Developed	14	0.175

All investable primary market share classes are included in the S&P^® Global BMI Index. All publicly listed multiple share class lines are eligible for inclusion in the S&P^® Global BMI Index, subject to meeting the eligibility criteria and foreign investors may hold shares in the class.

IPO additions to the S&P^® Global BMI Index take place quarterly. The criteria for inclusion of an IPO are the same as that used at the annual reconstitution of the S&P^® Global BMI Index. In addition, IPOs must have a trading history of at least three months as of the reference date. The reference date for IPO inclusions will be five weeks prior to the effective rebalancing date, and additions are effective at the open of Monday following the third Friday of March, June, September and December. Market cap and liquidity of IPOs are evaluated as of the reference date. Since an IPO will have traded less than a full year, the trading value data that is available is annualized to determine S&P^® Global BMI Index eligibility.

Certain large IPOs may be eligible for fast track entry, subject to the following conditions:

●    Only newly public IPOs and direct placement listings will be considered eligible for fast track entry. Formerly bankrupt companies that switch from Over-the-Counter Exchange or a non-covered exchange to anS&P covered exchange are ineligible.

●    Fast track IPO additions must meet a minimum float-adjusted market capitalization (“FMC”) threshold of US$ 2 billion, calculated using the shares offered (excluding over-allotment options) and the closing price on the first day of trading on an eligible exchange. The threshold level is reviewed from time to time and updated as needed to assure consistency with market conditions.

●    In addition, the IPO will need to meet all other applicable S&P^® Global BMI Index eligibility rules except for the liquidity requirement. If all necessary public information is available, S&P verifies that the fast track conditions have been met. Once S&P announces that the IPO is eligible for fast track addition, it is added to the S&P^® Global BMI Index with five business days lead time. At the discretion of the relevant index committee of S&P, fast track IPO additions eligible to be added during a quarterly rebalancing freeze period may instead be added on the rebalancing effective date.

If the practical available limit for an existing constituent (as defined by the known shares actually available to foreign investors) falls below 5%, then it will be removed from the S&P^® Global BMI Index at the next quarterly rebalancing. A stock can be added only if the practical available limit is 10% or more.

Index Construction

Stocks that meet the eligibility criteria are reviewed for specific practices related to clean energy in their business description. Index constituents are drawn from S&P Global BMI Index. The universe of companies that may be considered eligible for potential index inclusion is determined by S&P based on factors such as a company’s business description and its most recent reported revenue by segment. Companies are identified as being in the clean energy business for their involvement in the production of Clean Energy or provision of Clean Energy Technology & Equipment, including but not limited to:

Autocallable Market-Linked Step Up Notes TS-12

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

●    Biofuel & Biomass Energy Production 

●    Biofuel & Biomass Technology & Equipment 

●    Ethanol & Fuel Alcohol Production 

●    Fuel Cells Technology & Equipment 

●    Geothermal Energy Production 

●    Hydro Electricity Production 

●    Hydro-Electric Turbines & Other Equipment 

●    Photo Voltaic Cells & Equipment 

●    Solar Energy Production 

●    Wind Energy Production 

●    Wind Turbines & Other Wind Energy Equipment 

After determining the eligible universe, the index components are selected as follows:

1.    S&P defines exposure scores for each company based on its primary business. 

2.    The 30 largest companies, as ranked by the FMC, with exposure scores of 1 from the eligible universe are selected. 

3.    In the event of fewer than 30 qualifying stocks with an exposure score of 1, the largest companies, as ranked by FMC, from within the eligible universe with an exposure score of 0.5 are selected until the count reaches 30. 

4.    From the 30 companies selected in the prior steps, those with an S&P Trucost Limited (Trucost) carbon-to-revenue footprint standard score greater than three are excluded from index inclusion and replaced with the next highest ranked stock in order to satisfy the index’s target constituent count of 30.Replacement stocks must have a carbon-to-revenue footprint lower than those being replaced to qualify for index addition. Companies without Trucost coverage are eligible for index inclusion.

Constituents are weighted based on the product of each constituent’s FMC and exposure score, subject to a single constituent weight cap of 4.5%.

Index	Exposure Scores
SPGTCLEN	0	0.5	1
	Eliminated, no exposure.	Multi-industry with significant clean energy exposure	Primary business is clean energy

Carbon-to-Revenue Footprint. The carbon-to-revenue footprint data used in the methodology is calculated by Trucost, and is defined as the company’s annual GHG emissions (direct and first tier indirect), expressed as metric tons of carbon dioxide equivalent (tCO2e) emissions, divided by annual revenues for the corresponding year, expressed in millions of US dollars. 

Trucost’s annual research process evaluates the environmental performance of a given company with one output of this process being its annual greenhouse gas emissions profile.

Index Calculation

The SPGTCLEN is a non-market capitalization-weighted index where index constituents have a defined weight in the SPGTCLEN. The index value of the SPGTCLEN is simply the market value of the SPGTCLEN divided by the index divisor:

Index Value = (Index Market Value) / Divisor

Index Market Value =       Pi × Sharesi × IWFi × AWFi × FxRate

where N is the number of stocks in the index, Pi the price of stock i, IWFi is the float factor of stock i (as defined below), AWFi is the adjustment factor of stock i assigned at each index rebalancing date, t, which adjusts the market capitalization for all index constituents to achieve the user-defined weight, while maintaining the total market value of the overall index and FxRate is the exchange rate from the local currency into index currency for stock i. 

The AWF for each index constituent, i, at rebalancing date, t, is calculated by:

AWFi,t = Z / FloatAdjustedMarketValuei,t × Wi,t × FxRate

Where Z is an index specific constant set for the purpose of deriving the AWF and, therefore, each stock’s share count used in the index calculation (often referred to as modified index shares). Wi,t is the user-defined weight of stock i on rebalancing date t and FxRate is the exchange rate from the local currency into index currency for stock i.

Autocallable Market-Linked Step Up Notes TS-13

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Float Adjustment. Float adjustment means that the number of shares outstanding is reduced to exclude closely held shares from the calculation of the index value because such shares are not available to investors. The goal of float adjustment is to distinguish between strategic (control) shareholders, whose holdings depend on concerns such as maintaining control rather than the economic fortunes of the company, and those holders whose investments depend on the stock’s price and their evaluation of a company’s future prospects. Generally, these “control holders” include officers and directors, private equity, venture capital & special equity firms, other publicly traded companies that hold shares for control, strategic partners, holders of restricted shares, employee stock ownership plans, employee and family trusts, foundations associated with the company, holders of unlisted share classes of stock or government entities at all levels (other than government retirement/pension funds) and any individual person who controls a 5% or greater stake in a company as reported in regulatory filings. Shares that are not considered outstanding are also not included in the available float. These generally include treasury stock, stock options, equity participation units, warrants, preferred stock, convertible stock and rights.

For each component, S&P calculates an Investable Weight Factor (“IWF”), which represents the portion of the total shares outstanding that are considered part of the public float for purposes of the SPGTCLEN.

Divisor. Continuity in index values of the SPGTCLEN is maintained by adjusting its divisor for all changes in its constituents’ share capital after its base date. This includes additions and deletions to the SPGTCLEN, rights issues, share buybacks and issuances and non-zero price spin-offs. The value of the SPGTCLEN’s divisor over time is, in effect, a chronological summary of all changes affecting the base capital of the SPGTCLEN. The divisor of the SPGTCLEN is adjusted such that the index value of the SPGTCLEN at an instant just prior to a change in base capital equals the index value of the SPGTCLEN at an instant immediately following that change.

Index Maintenance

The SPGTCLEN is maintained by the S&P Dow Jones Index Committee (the “Index Committee”). The Index Committee meets regularly. At each meeting, the Index Committee may review pending corporate actions that may affect the SPGTCLEN constituents, statistics comparing the composition of the SPGTCLEN to the market, companies that are being considered as candidates for addition to the SPGTCLEN, and any significant market events. In addition, the Index Committee may revise index policy covering rules for selecting companies, treatment of dividends, share counts or other matters.

S&P considers information about changes to the SPGTCLEN and related matters to be potentially market moving and material. Therefore, all Index Committee discussions are confidential.

The Index Committee reserves the right to make exceptions when applying the methodology if the need arises. In any scenario where the treatment differs from the general rules S&P will provide sufficient notice, whenever possible.

In addition to the daily governance of the SPGTCLEN and maintenance of index methodologies, at least once within any 12-month period, the Index Committee reviews the methodology to ensure the SPGTCLEN continues to achieve the stated objectives, and that the data and methodology remain effective. In certain instances, S&P may publish a consultation inviting comments from external parties.

Autocallable Market-Linked Step Up Notes TS-14

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

The following graph shows the daily historical performance of the Underlying Fund in the period from January 1, 2011 through September 23, 2021.  We obtained this historical data from Bloomberg L.P.  We have not independently verified the accuracy or completeness of the information obtained from Bloomberg L.P. On September 23, 2021, the Closing Market Price of the Underlying Fund was $22.69.

Historical Performance of the Underlying Fund

This historical data on the Underlying Fund is not necessarily indicative of the future performance of the Underlying Fund or what the value of the notes may be. Any historical upward or downward trend in the priceof the Underlying Fund during any period set forth above is not an indication that the priceof the Underlying Fund is more or less likely to increase or decrease at any time over the term of the notes.

Before investing in the notes, you should consult publicly available sources for the prices and trading patternsof the Underlying Fund.

Autocallable Market-Linked Step Up Notes TS-15

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Supplement to the Plan of Distribution; Conflicts of Interest

Under our distribution agreement with BofAS, BofAS will purchase the notes from us as principal at the public offering price indicated on the cover of this term sheet, less the indicated underwriting discount.

MLPF&S will purchase the notes from BofAS for resale, and will receive a selling concession in connection with the sale of the notes in an amount up to the full amount of underwriting discount set forth on the cover of this term sheet.

MLPF&S and BofAS,  each a broker-dealer subsidiary of BAC, are members of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and will participate as selling agent in the case of BofAS and as dealer in the case of MLPF&S in the distribution of the notes.Accordingly, offerings of the notes will conform to the requirements of Rule 5121 applicable to FINRA members. Neither BofAS nor MLPF&S may make sales in this offering to any of its discretionary accounts without the prior written approval of the account holder.

We may deliver the notes against payment therefor in New York, New York on a date that is greater than two business days following the pricing date.Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise.Accordingly, if the initial settlement of the notes occurs more than two business days from the pricing date, purchasers who wish to trade the notes more than two business days prior to the original issue date will be required to specify alternative settlement arrangements to prevent a failed settlement.

The notes will not be listed on any securities exchange.In the original offering of the notes, the notes will be sold in minimum investment amounts of 100 units.If you place an order to purchase the notes, you are consenting to MLPF&S and/or one of its affiliates acting as a principal in effecting the transaction for your account.

MLPF&S and BofAS may repurchase and resell the notes, with repurchases and resales being made at prices related to then-prevailing market prices or at negotiated prices, and these will include MLPF&S’s and BofAS’s trading commissions and mark-ups or mark-downs.MLPF&S and BofAS may act as principal or agent in these market-making transactions; however,neither is obligated to engage in any such transactions. At their discretion, for a short, undeterminedinitial period after the issuance of the notes, MLPF&S and BofAS may offer to buy the notes in the secondary market at a price that may exceed the initial estimated value of the notes. Any price offered by MLPF&S or BofAS for the notes will be based on then-prevailing market conditions and other considerations, including the performance of the Underlying Fundand the remaining term of the notes. However, neither we nor any of ouraffiliates is obligated to purchase your notes at any price, or at any time, and we cannot assure you that we or any of our affiliates will purchase your notes at a price that equals or exceeds the initial estimated value of the notes.

The value of the notes shown on your account statementwill be based on BofAS’sestimate of the value of the notes if BofAS or another of our affiliates were to make a market in the notes, which it is not obligated to do. That estimate will be based upon the price that BofAS may pay for the notes in light of then-prevailing market conditionsand other considerations, as mentioned above, and will include transaction costs. At certain times, this price may be higher than or lower than the initial estimated value of the notes.

An investor’s household, as referenced on the cover of this term sheet, will generally include accounts held by any of the following, as determined by MLPF&S in its discretion and acting in good faith based upon information then available to MLPF&S:

●    the investor’s spouse (including a domestic partner), siblings, parents, grandparents, spouse’s parents, children and grandchildren, but excluding accounts held by aunts, uncles, cousins, nieces, nephews or any other family relationship not directly above or below the individual investor;

●    a family investment vehicle, including foundations, limited partnerships and personal holding companies, but only if the beneficial owners of the vehicle consist solely of the investor or members of the investor’s household as described above; and

●    a trust where the grantors and/or beneficiaries of the trust consist solely of the investor or members of the investor’s household as described above; provided that, purchases of the notes by a trust generally cannot be aggregated together with any purchases made by a trustee’s personal account.        

Purchases in retirement accounts will not be considered part of the same household as an individual investor’s personal or other non-retirement account, except for individual retirement accounts (“IRAs”), simplified employee pension plans (“SEPs”), savings incentive match plan for employees (“SIMPLEs”), and single-participant or owners only accounts (i.e., retirement accounts held by self-employed individuals, business owners or partners with no employees other than their spouses). 

Please contact your MLPF&Sfinancial advisor if you have any questions about the application of these provisions to your specific circumstances or think you are eligible.

Autocallable Market-Linked Step Up Notes TS-16

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Structuring the Notes

The notes are our debt securities, the return on which is linked to the performance of the Underlying Fund.  The related guarantees are BAC’s obligations. As is the case for all of our and BAC’s respective debt securities, including our market-linked notes, the economic terms of the notes reflect our and BAC’s actual or perceived creditworthiness at the time of pricing.  In addition, because market-linked notes result in increased operational, funding and liability management costs to us and BAC, BAC typically borrows the funds under these types of notes at a rate that is more favorable to BAC than the rate that it might pay for a conventional fixed or floating rate debt security. Thisrate, which we refer to in this term sheet as BAC’s internal funding rate, is typically lower than the rate BAC would pay when it issues conventional fixed or floating rate debt securities. This generally relatively lower internal funding rate, which is reflected in the economic terms of the notes, along with the fees and charges associated with market-linked notes, typically results in the initial estimated value of the notes on the pricing date being less than their public offering price.

Payments on the notes, including the amount you receive at maturity or upon an automatic call, will be calculated based on the $10 per unit principal amount and will depend on the performance of the Underlying Fund. In order to meet these payment obligations, at the time we issue the notes, we may choose to enter into certain hedging arrangements (which may include call options, put options or other derivatives) with BofAS or one of our other affiliates.  The terms of these hedging arrangements are determined by seeking bids from market participants, includingMLPF&S, BofAS and its affiliates, and take into account a number of factors, including our and BAC’s creditworthiness, interest rate movements, the volatility of the Underlying Fund, the tenor of the notes and the tenor of the hedging arrangements.  The economic terms of the notes and their initial estimated value depend in part on the terms of these hedging arrangements.

BofAS has advised us that the hedging arrangements will include a hedging related charge of approximately $0.05 per unit, reflecting an estimated profit to be credited to BofAS from these transactions.  Since hedging entails risk and may be influenced by unpredictable market forces, additional profits and losses from these hedging arrangements may be realized by BofAS or any third party hedge providers.

For further information, see “Risk Factors—General Risks Relating to the Notes” beginning on page PS-8 and “Use of Proceeds” on page PS-24 of the accompanying product supplement.

Autocallable Market-Linked Step Up Notes TS-17

Autocallable Market-Linked Step Up Notes
Linked to the iShares^® Global Clean Energy ETF, due October  , 2024

Summary Tax Consequences

You should consider the U.S. federal income tax consequences of an investment in the notes, including the following: 

■    There is no statutory, judicial, or administrative authority directly addressing the characterization of the notes.

■    You agree with us (in the absence of an administrative determination, or judicial ruling to the contrary) to characterize and treat the notes for all tax purposes as a callable single financial contract with respect to the Underlying Fund.

■    Under this characterization and tax treatment of the notes, a U.S. Holder (as defined beginning on page 38 of the prospectus) generally will recognize capital gain or loss upon maturity or upon a sale, exchange, or redemption of the notes prior to maturity. This capital gain or loss generally will be long-term capital gain or loss if you held the notes for more than one year.

■    No assurance can be given that the Internal Revenue Service (“IRS”) or any court will agree with this characterization and tax treatment.

■    Under current IRS guidance, withholding on “dividend equivalent” payments (as discussed in the product supplement), if any, will not apply to notes that are issued as of the date of this term sheet unless such notes are “delta-one” instruments.

You should consult your own tax advisor concerning the U.S. federal income tax consequences to you of acquiring, owning, and disposing of the notes, as well as any tax consequences arising under the laws of any state, local, foreign, or other tax jurisdiction and the possible effects of changes in U.S. federal or other tax laws. You should review carefully the discussion under the section entitled “U.S. Federal Income Tax Summary” beginning on page PS-42 of the accompanying product supplement.

Where You Can Find More Information

We and BAC have filed a registration statement (including a productsupplement, a prospectus supplement, and a prospectus) with the SEC for the offering to which this term sheet relates.  Before you invest, you should read the Note Prospectus, including this term sheet, and the other documents relating to this offering that we and BAC have filed with the SEC, for more complete information about us, BAC and this offering.  You may get these documents without cost by visiting EDGAR on the SEC website at www.sec.gov.  Alternatively, we, any agent, or any dealer participating in this offering will arrange to send you these documents if you so request by calling MLPF&S or BofAS toll-free at 1-800-294-1322.

Autocallable Market-Linked Step Up Notes TS-18