I am pleased to tell you about an investment opportunity and, just as importantly, to request your vote. Pursuant to a plan of conversion (the “Plan”), Community Savings will convert from the mutual (meaning no stockholders) to the stock form of ownership. To accomplish the conversion, Community Savings Bancorp, Inc., a newly formed Maryland corporation that will become the holding company for Community Savings, is conducting an offering of its shares of common stock. Enclosed you will find a Prospectus, a Proxy Statement and a Questions and Answers Brochure describing the conversion, the offering and the Plan.

Your vote is extremely important for us to complete the conversion. Although we have received conditional regulatory approval to implement the Plan, we must receive the vote of Community Savings customers in favor of the Plan. NOT VOTING YOUR ENCLOSED PROXY CARD(S) WILL HAVE THE SAME EFFECT AS VOTING “AGAINST” THE PLAN. Note that you may receive more than one Proxy Card, depending on the ownership structure of your accounts at Community Savings. Please vote all the Proxy Cards you receive — none are duplicates! To cast your vote, please sign each Proxy Card and return the card(s) in the Proxy Reply Envelope provided. Alternatively, you may vote by Internet by following the simple instructions on the Proxy Card.

As an eligible Community Savings customer, you have non-transferable rights, but no obligation, to purchase shares of common stock during our Subscription Offering before any shares are made available for sale to the general public. The common stock is being offered at $10.00 per share, and there will be no sales commission charged to purchasers during the offering. The enclosed Prospectus describes the stock offering in more detail. Please read the Prospectus carefully before making an investment decision.

If you are interested in purchasing shares of common stock, please complete the enclosed Stock Order Form and return it, with full payment. You may submit your Stock Order Form by overnight delivery to the indicated address on the Stock Order Form, by hand-delivery to Community Savings’ office, located at 425 Main Street, Caldwell, Ohio, or by mail using the Stock Order Reply Envelope provided. Stock Order Forms and full payment must be received (not postmarked) before 2:00 p.m., Eastern Time, on _________ __, 2016. If you are considering purchasing stock with funds you have in an IRA or other retirement account, please call our Stock Information Center promptly for guidance, because these orders require additional processing time.

I invite you to consider this opportunity to share in our future. Thank you for your continued support as a Community Savings customer.

This letter is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offer is made only by the Prospectus. These securities are not deposits or savings accounts and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Call our Stock Information Center, toll-free, at 1-(877) __________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

I am pleased to tell you about an investment opportunity. Community Savings Bancorp, Inc., a newly formed Maryland corporation that will serve as the parent company of Community Savings, is offering shares of its common stock for sale at a price of $10.00 per share. No sales commission will be charged to purchasers during the offering. The offering is being conducted pursuant to a plan of conversion adopted by Community Savings that provides for the conversion of Community Savings from the mutual (meaning no stockholders) to the stock form of ownership.

Our records indicate that you were a depositor of Community Savings as of the close of business on January 1, 2015 or ________ __, 2016, whose account(s) was/were closed thereafter. As such, you have non-transferable rights, but no obligation, to subscribe for shares of common stock during our Subscription Offering before any shares are made available for sale to the general public.

Please read the enclosed materials carefully before making an investment decision. If you are interested in purchasing shares of common stock, please complete the enclosed Stock Order Form and return it, with full payment. You may submit your Stock Order Form by overnight delivery to the indicated address on the Stock Order Form, by hand-delivery to Community Savings’ office, located at 425 Main Street, Caldwell, Ohio, or by mail using the Stock Order Reply Envelope provided. Stock Order Forms and full payment must be received (not postmarked) before 2:00 p.m., Eastern Time, on ________ __, 2016. If you are considering purchasing stock with funds you have in an IRA or other retirement account, please call our Stock Information Center promptly for guidance, because these orders require additional processing time.

If you have questions about our organization or purchasing shares, please refer to the enclosed Prospectus and Questions and Answers Brochure, or call our Stock Information Center at the number shown below.

I invite you to consider this opportunity to share in our future as a Community Savings Bancorp, Inc. stockholder.

Call our Stock Information Center, toll-free, at 1-(877) __________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

Please read the enclosed materials carefully. If you are interested in purchasing shares of Community Savings Bancorp, Inc. common stock, please complete the enclosed Stock Order Form and return it, with full payment. You may submit your Stock Order Form by overnight delivery to the indicated address on the Stock Order Form, by hand-delivery to Community Savings’ office, located at 425 Main Street, Caldwell, Ohio, or by mail using the Stock Order Reply Envelope provided. Stock Order Forms and full payment must be received (not postmarked) before 2:00 p.m., Eastern Time, on _________ __, 2016. If you are considering purchasing stock with funds you have in an IRA or other retirement account, please call our Stock Information Center promptly for guidance, because these orders require additional processing time.

I invite you to consider this opportunity to share in our future as a Community Savings Bancorp, Inc. stockholder.

Call our Stock Information Center, toll-free, at 1-(877) ____________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

I am pleased to tell you that pursuant to a plan of conversion (the “Plan”), Community Savings will convert from the mutual (meaning no stockholders) to the stock form of ownership. To accomplish the conversion, Community Savings Bancorp, Inc., a newly formed Maryland corporation that will become the holding company of Community Savings, is conducting an offering of its shares of common stock.

Your vote is extremely important for us to complete the conversion. Although we have received conditional regulatory approval to implement the Plan, we must receive the vote of Community Savings customers in favor of the Plan. NOT VOTING YOUR ENCLOSED PROXY CARD(S) WILL HAVE THE SAME EFFECT AS VOTING “AGAINST” THE PLAN. Note that you may receive more than one Proxy Card, depending on the ownership structure of your accounts at Community Savings. Please vote all the Proxy Cards you receive — none are duplicates. To cast your vote, please sign each Proxy Card and return the card(s) in the Proxy Reply Envelope provided. Alternatively, you may vote by Internet by following the simple instructions on the Proxy Card.

Although you may vote on the Plan, we regret that Community Savings Bancorp, Inc. is unable to offer its common stock to you because the small number of customers in your jurisdiction makes registration or qualification of the common stock under your state securities laws prohibitively expensive or otherwise impractical.

If you have any questions about the Plan or voting, please refer to the enclosed information or call our Information Center.

Call our Information Center, toll-free, at 1-(877) ___________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

Keefe, Bruyette & Woods, a Stifel Company, has been retained by Community Savings Bancorp, Inc. as selling agent in connection with the offering of Community Savings Bancorp, Inc. common stock.

At the request of Community Savings Bancorp, Inc., we are enclosing materials regarding the offering of Community Savings Bancorp, Inc. shares of common stock. Included in this package is a Prospectus describing the stock offering. We encourage you to read the enclosed information carefully, including the “Risk Factors” section of the Prospectus.

If you have not yet voted the Proxy Card(s) we recently mailed to you
in a large white package,
please vote the enclosed replacement Proxy Card.

You may vote by mail using the enclosed envelope or follow the
Internet voting instructions on the Proxy Card.

THE CONVERSION WILL CHANGE OUR FORM OF
CORPORATE ORGANIZATION, BUT WILL NOT RESULT IN
CHANGES TO OUR STAFF, MANAGEMENT OR YOUR

DEPOSIT ACCOUNTS OR LOANS AT COMMUNITY SAVINGS. DEPOSIT
ACCOUNTS WILL NOT BE CONVERTED TO COMMON STOCK.

If you receive more than one of these reminder mailings,
please vote each Proxy Card received. None are duplicates!

Please call our Information Center, toll-free, at 1-(877) ____________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

Our records indicate that you have not voted the Proxy Card(s) we mailed to you.

IF YOU ARE UNSURE WHETHER YOU VOTED, PLEASE
VOTE THE ENCLOSED REPLACEMENT PROXY
CARD. YOUR VOTE WILL NOT BE COUNTED TWICE.

NOT VOTING HAS THE SAME EFFECT AS VOTING
“AGAINST” THE PLAN OF CONVERSION (THE “PLAN”).

VOTING DOES NOT OBLIGATE YOU TO PURCHASE SHARES
OF COMMON STOCK DURING THE OFFERING, NOR DOES IT
AFFECT YOUR COMMUNITY SAVINGS DEPOSIT ACCOUNTS
OR LOANS.

If you receive more than one of these reminder mailings,
please vote each Proxy Card received. None are duplicates!

Please call our Information Center, toll-free, at 1-(877) ____________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday,
except bank holidays.

NOT VOTING HAS THE SAME EFFECT
AS VOTING “AGAINST” THE PLAN OF CONVERSION
(THE “PLAN”).

In order to implement the Plan we must obtain the
approval of our voting customers.

Please disregard this notice if you have already voted.
If you are unsure whether you voted, vote the enclosed replacement
Proxy Card. Your vote will not be counted twice!

If you receive more than one of these reminder mailings, please vote
each Proxy Card received. None are duplicates!

Please note: Implementing the Plan will not affect your deposit
accounts or loans at Community Savings. Deposit accounts will
continue to be insured by the FDIC, up to the maximum legal limits.
Voting does not require you to purchase common stock in the offering.

Please call our Information Center toll-free at 1-(877) ______________,
from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday, except bank holidays.

Your financial institution is in the process of selling stock to the public in a mutual-to-stock conversion transaction. As an account holder at this institution, you have certain priority subscription rights to purchase stock in the offering. These priority subscription rights are non-transferable. If you subscribe for stock, you will be asked to sign a statement that the purchase is for your own account, and that you have no agreement or understanding regarding the subsequent sale or transfer of any shares you receive.

On occasion, unscrupulous people attempt to persuade account holders to transfer subscription rights, or to purchase shares in the offering based on the understanding that the shares will subsequently be transferred to others. Such arrangements violate federal regulations. If you participate in these schemes, you are breaking the law and may be subject to prosecution. If someone attempts to persuade you to participate in such a scheme, please contact the Office of the Comptroller of the Currency (OCC) Customer Assistance Group, toll-free, at 1 (800) 613-6743. The OCC is very interested in ensuring that the prohibitions on transfer of subscription rights are not violated.

How will you know if you are being approached illegally? Typically, a fraudulent opportunist will approach you and offer to “loan” you money to purchase a significant amount of stock in the offering. In exchange for that “loan” you most likely will be asked either to transfer control of any stock purchased with that money to an account the other person controls, or sell the stock and give the majority of the profits to the other person. You may be told, untruthfully, that there is no risk to you, that the practice is common, and even if you are caught, that your legal expenses will be covered.

On the back of this page is a list of some key concepts that you should keep in mind when considering whether to participate in a mutual-to-stock conversion offering. If you have questions, please contact the Stock Information Center at the telephone number listed elsewhere in the literature you are receiving. Alternatively, you can contact the OCC at: The Central District Office located at One Financial Place, Suite 2700, 440 South LaSalle Street, Chicago, IL 60605.

Key concepts for investors to bear in mind when considering whether to participate in a conversion offering include the following:

The bottom line for investors is always to remember that if an opportunity sounds too good to be true, it probably is too good to be true.

Signature:_________________________________________________________Date:____________________, 2016

NOTE: Only one signature is required in the case of a joint account. Please sign exactly as your name appears on this proxy card. When signing as attorney, executor, administrator, trustee or guardian, please give your full title. Corporations or partnership proxies should be signed by an authorized officer.

Internet voting is a quick and simple way to vote, available through
11:59 P.M., Eastern Time, on ______ __, 2016

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF COMMUNITY SAVINGS FOR USE AT A SPECIAL MEETING OF MEMBERS TO BE HELD ON _______ __, 2016, AND ANY ADJOURNMENTS OF THAT MEETING, FOR THE PURPOSES SET FORTH IN THE FOREGOING NOTICE OF SPECIAL MEETING. YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR APPROVAL OF THE PLAN OF CONVERSION.

The above-signed being a member of Community Savings (the “Bank”), hereby authorizes the full board of directors of the Bank, and each of them, with full powers of substitution, to represent the undersigned at the special meeting of members of the Bank to be held on ______ __, 2016 at _:00 p.m., Eastern Time, at the Bank’s office located at 425 Main Street, Caldwell, Ohio, and at any adjournment of the special meeting, to act with respect to all votes that the undersigned would be entitled to cast if then personally present, as set forth above.

Any member giving a proxy may revoke it at any time before it is voted by delivering to the Secretary of the Bank either a written revocation of the proxy, or a duly executed proxy bearing a later date, or by voting in person at the Special Meeting.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE “FOR” THE PLAN. NOT
VOTING IS THE EQUIVALENT OF VOTING “AGAINST” THE PLAN. PLEASE

VOTING DOES NOT REQUIRE YOU TO PURCHASE SHARES OF
COMMUNITY SAVINGS BANCORP, INC. COMMON STOCK IN THE OFFERING.

This pamphlet answers questions about our conversion and stock offering. Investing in shares of common stock involves certain risks. Before making an investment decision, please read the enclosed Prospectus carefully, including the “Risk Factors” section.

GENERAL — THE CONVERSION

Our board of directors has determined that the conversion is in the best interests of our organization, our customers and the communities we serve.

What is the conversion?

Under our plan of conversion (the “Plan”), Community Savings will convert from a mutual (meaning no stockholders) to the stock form of ownership, through the sale of shares of Community Savings Bancorp, Inc. common stock. Upon completion of the conversion, 100% of the common stock of Community Savings Bancorp, Inc. will be owned by stockholders, and Community Savings Bancorp, Inc. will own Community Savings.

What are the reasons for the conversion and offering?

Our primary reasons for converting and raising additional capital through the offering are to: increase capital to support future growth and profitability; retain and attract qualified personnel by establishing stock-based benefit plans for management and employees; have greater flexibility to structure and finance the opportunistic expansion of our operations; and offer our customers and employees an opportunity to purchase our stock.

Is Community Savings considered “well-capitalized” for regulatory purposes?

Yes. As of June 30, 2016, Community Savings was considered “well-capitalized” for regulatory purposes.

Will customers notice any change in Community Savings, day-to-day activities as a result of the conversion and offering?

No. It will be business as usual. The conversion is an internal change in our corporate structure. There will be no change to our board of directors, management, and staff as a result of the conversion. Community Savings will continue to operate as an independent savings bank.

Will the conversion and offering affect customers’ deposit accounts or loans?

No. The conversion and offering will not affect the balance or terms of deposits or loans, and deposits will continue to be federally insured by the Federal Deposit Insurance Corporation up to the maximum legal limits. Deposit accounts will not be converted to stock.

THE PROXY VOTE

Although we have received conditional regulatory approval, the Plan and is also subject to approval by our eligible customers.

Why should I vote “FOR” the Plan?

Your vote “For” the Plan is extremely important to us. Each eligible Community Savings customer as of ________, 2016 received a Proxy Card attached to a Stock Order Form. These packages also include a Proxy Statement describing the Plan which cannot be implemented without

customer approval.

Voting does not obligate you to purchase shares of common stock during the offering.

What happens if I don’t vote?

Your vote is very important. Proxy Cards not voted will have the same effect as voting ‘‘Against’’ the Plan.

Without sufficient favorable votes, we cannot complete the conversion and the related stock offering.

How do I vote?

Mark your vote, sign and date each Proxy Card enclosed and return the card(s) in the enclosed Proxy Reply Envelope. Alternatively, you may vote by Internet by following the simple instructions on the Proxy Card. PLEASE VOTE PROMPTLY. NOT VOTING HAS THE SAME EFFECT AS VOTING ‘‘AGAINST’’ THE PLAN. Internet voting is available 24 hours a day.

How many votes are available to me?

Depositors at the close of business on ________, 2016 are entitled to one vote for each $100 or fraction thereof on deposit. Additionally, each borrower as of May 26, 2004, who remained a borrower as of ________, 2016, will be entitled to one vote, in addition to votes he or she is entitled to as a depositor. However, no customer may cast more than 1,000 votes. Proxy Cards are not imprinted with your number of votes; however, votes will be automatically tallied by computer.

Why did I receive more than one Proxy Card?

If you had more than one deposit and/or loan account on __________, 2016, you may have received more than one Proxy Card, depending on the ownership structure of your accounts. There are no duplicate cards — please promptly vote all the Proxy Cards sent to you.

More than one name appears on my Proxy Card. Who must sign?

The name(s) reflect the title of your account. Proxy Cards for joint accounts require the signature of only one of the account holders. Proxy Cards for trust or custodian accounts must be signed by the trustee or the custodian, not the listed beneficiary.

THE STOCK OFFERING AND PURCHASING SHARES

How many shares are being offered and at what price?

Community Savings Bancorp, Inc. is offering for sale between 391,000 and 529,000 shares of common stock (subject to increase to 608,350 shares) at $10.00 per share. No sales commission will be charged to purchasers.

Who is eligible to purchase stock during the stock offering?

Pursuant to our Plan, non-transferable rights to subscribe

for shares of Community Savings Bancorp, Inc. common stock in the Subscription Offering have been granted in the following descending order of priority:

Priority #1 — Depositors of Community Savings with aggregate balances of $50 or more at the close of business on January 1, 2015;

Priority #2 — Our tax-qualified employee benefit plans;

Priority #3 — Depositors of Community Savings with aggregate balances of $50 or more at the close of business on ____________, 2016; and

Priority #4 — Depositors of Community Savings at the close of business on ________, 2016 and borrowers as of May 26, 2004 who remained borrowers at the close of business on ___________, 2016.

Shares not sold in the Subscription Offering may be offered for sale to the public in a Community Offering, with a preference given to natural persons and trusts of natural persons residing in Noble, Washington and Monroe Counties, Ohio.

Shares not sold in the Subscription and Community Offerings may be offered for sale to the general public through a Syndicated Community Offering.

I am eligible to subscribe for shares of common stock in the Subscription Offering but am not interested in investing. May I allow someone else to use my Stock Order Form to take advantage of my priority as an eligible account holder?

No. Subscription rights are non-transferable! Only those eligible to subscribe in the Subscription Offering, as listed above, may purchase shares in the Subscription Offering. To preserve subscription rights, the shares may only be registered in the name(s) of eligible account holder(s). On occasion, unscrupulous people attempt to persuade account holders to transfer subscription rights, or to purchase shares in the offering based on an understanding that the shares will be subsequently transferred to others. Participation in such schemes is against the law and may subject involved parties to prosecution. If you become aware of any such activities, please notify our Stock Information Center promptly so that we can take the necessary steps to protect our eligible account holders’ subscription rights in the offering.

How may I buy shares during the Subscription and Community Offerings?

Shares can be purchased by completing a Stock Order Form and returning it, with full payment, so that it is received (not postmarked) before the offering deadline. You may submit your Stock Order Form by overnight delivery to the indicated address on the Stock Order Form, by mail using the Stock Order Reply Envelope provided, or by hand-delivery to Community Savings’ office, located at 425 Main Street, Caldwell, Ohio. Please do not mail Stock Order Forms to Community Savings.

What is the deadline for purchasing shares?

To purchase shares in the Subscription Offering, you must deliver a properly completed, signed Stock Order Form, with full payment, so that it is received (not postmarked) before 2:00 p.m., Eastern Time, on ___________, 2016. Acceptable methods for delivery of Stock Order Forms are described above.

How may I pay for the shares?

Payment for shares can be remitted in two ways:

(1)

By personal check, bank check or money order, made payable to Community Savings Bancorp, Inc. These will be deposited upon receipt. We cannot accept wires or third party checks. Community Savings line of credit checks may not be remitted for this purchase. Please do not mail cash!

(2)

By authorized deposit account withdrawal of funds from your Community Savings deposit account(s). The Stock Order Form section titled “Method of Payment — Deposit Account Withdrawal” allows you to list the account number(s) and amount(s) to be withdrawn. Funds designated for direct withdrawal must be in the account(s) at the time the Stock Order Form is received. You may not authorize direct withdrawal from accounts with check-writing privileges. Please submit a check instead. If you request direct withdrawal from such accounts, we reserve the right to interpret that as your authorization to treat those funds as if we had received a check for the designated amount, and we will immediately withdraw the amount from your checking account(s). Also, IRA or other retirement accounts held at Community Savings may not be listed for direct withdrawal. See information on retirement accounts below.

Will I earn interest on my funds?

Yes. If you pay by personal check, bank check or money order, you will earn interest at Community Savings’ statement savings rate, which is subject to change at any time and is currently 0.20% per annum, from the date we process your payment until the completion of the conversion and offering. At that time, you will be issued a check for interest earned on these funds. If you pay for shares by authorizing a direct withdrawal from your Community Savings deposit account(s), your funds will continue earning interest within the account at the contract rate. The interest will remain in your account(s) when the designated withdrawal is made, upon completion of the conversion and offering.

Are there limits to how many shares I can order?

Yes. The minimum order is 25 shares ($250). The maximum number of shares that may be purchased by a person or group of persons exercising subscription rights through a single deposit account held jointly is 15,000 shares ($150,000). Additionally, no person or entity, together with any associate or group of persons acting in concert, may purchase more than 20,000 shares ($200,000) in all categories of the offering combined.

More detail on purchase limits, including the definition of “associate” and “acting in concert”, can be found in the Prospectus section entitled “The Conversion and Offering — Limitations on Common Stock Purchases”.

May I use my Community Savings individual retirement account (“IRA”) to purchase shares?

You may use funds currently held in retirement accounts with Community Savings. However, before you place your stock order, the funds you wish to use must be transferred to a self-directed retirement account maintained by an independent trustee or custodian, such as a brokerage

firm. If you are interested in using IRA or any other retirement funds held at Community Savings or elsewhere, please call our Stock Information Center as soon as possible for guidance, but preferably at least two weeks before the _________, 2016 offering deadline. Your ability to use such funds for this purchase may depend on time constraints, because this type of purchase requires additional processing time, and may be subject to limitations imposed by the institution where the funds are held.

May I use a loan from Community Savings to pay for shares?

No. Community Savings, by regulation, may not extend a loan for the purchase of Community Savings Bancorp, Inc. common stock during the offering. Similarly, you may not use existing Community Savings line of credit checks to purchase stock during the offering.

May I change my mind after I place an order to subscribe for stock?

No. After receipt, your executed Stock Order Form cannot be modified or revoked without our consent or unless the offering is terminated or is extended beyond ________, 2017 or the number of shares of common stock to be sold is increased to more than 608,350 shares or decreased to less than 391,000 shares.

Are directors and executive officers of Community Savings planning to purchase stock?

Yes! Directors and executive officers, together with their associates, are expected to subscribe for an aggregate of 39,500 shares ($395,000) or approximately 10.1% of the shares to be sold at the minimum of the offering range.

Will the stock be insured?

No. Like any common stock, Community Savings Bancorp, Inc.’s stock will not be insured by the Federal Deposit Insurance Corporation.

Will dividends be paid on the stock?

We do not currently intend to pay dividends on our common stock following completion of the stock offering. In the unlikely event that we do determine to pay dividends in the future, the payment and amount of any dividend payments will depend upon a number of factors, including the following: regulatory capital requirements; our financial condition and results of operations; our other uses of funds for the long-term value of stockholders; tax considerations; statutory and regulatory limitations; and general economic conditions.

How will the shares of Community Savings Bancorp, Inc. trade?

Upon completion of the conversion and offering, Community Savings Bancorp, Inc.’s shares will be quoted on the OTC Pink Marketplace. Once the shares have begun trading, you may contact a firm offering investment services in order to buy or sell Community Savings Bancorp, Inc. shares of common stock.

If I purchase shares during the offering, when will I receive my shares?

All shares of Community Savings Bancorp, Inc. common stock sold in the stock offering will be issued in book-entry form on the books of our transfer agent, through the Direct Registration System. Paper stock certificates will not be issued. As soon as practicable after completion of the stock offering, our transfer agent will send, by first class mail, a statement reflecting your stock ownership.

WHERE TO GET MORE INFORMATION

How can I get more information?

For more information, refer to the enclosed Prospectus or call our Stock Information Center, toll-free, at 1-(877) ___-____, from 10:00 a.m. to 4:00 p.m., Eastern Time, Monday through Friday. The Stock Information Center is not open on bank holidays.

This brochure is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offer is made only by the Prospectus. These securities are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other government agency.

This letter is to acknowledge receipt of your Stock Order Form to purchase common stock offered by Community Savings Bancorp, Inc. Please check the following information carefully to ensure that we have entered your order correctly. Each order is assigned an offering category described below. Acceptance of your order does not guarantee that you will receive the shares you have ordered. If there are not sufficient shares available to satisfy all subscriptions, the shares of common stock you will receive will be subject to the allocation provisions of the plan of conversion, as well as other conditions and limitations described in the Community Savings Bancorp, Inc. Prospectus dated _______, 2016. Refer to pages ___ – ___ of the Community Savings Bancorp, Inc. Prospectus for further information regarding subscription priorities. Shares will be allocated first to categories in the subscription offering in the order of priority set forth below.

Following completion of the offering, allocation information, when available, will be released as soon as practicable on the following website: https://allocations.kbw.com/

(Depending on vote status and number of days until the special meeting of members, this can be mailed. It can be personalized, as shown - or it can be a short, non-personalized version printed on a postcard. Both alternatives allow quick mailing and quick receipt of the vote, because proxy cards and return envelopes are not enclosed.)

Not voting the Proxy Card(s) we mailed to you has the same effect as voting “Against” the plan of conversion.

YOUR BOARD OF DIRECTORS ASKS THAT YOU VOTE “FOR” THE PLAN OF CONVERSION.

Please take a few minutes to call the number shown below. A representative of ________________, our Independent Voting Agent, will record your confidential vote by phone. This is the quickest way to cast your vote. You do NOT need your Proxy Card in order to vote.

If you are unsure whether you voted, don’t worry. Your vote will not be counted twice.

(This notice should be printed by Community Savings, and should be placed in the branch lobby after the Stock Information Center opens. Position it in one or more ways: on an easel, on the front doors, on counters, at customer service/branch manager’s desk or electronically on the TVs in the branch).

This notice is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offer is made only by the Prospectus. The shares of common stock are not deposits or savings accounts and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

This notice is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offer is made only by the Prospectus. These securities are not deposits or savings accounts and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

[To encourage “late” voting. Tear-off phone number slips can accompany this poster. Generally, this poster is used after a Final Reminder Proxygram is mailed.]

Take a minute to call _____________, our
Independent Voting Agent, at 1-(___) -___-____
(toll-free), Monday through Friday,

If you are unsure whether you voted already, please call. Your
vote will not be counted twice!

You may have received a large white envelope containing a Proxy Card(s) to be used to vote on Community Savings’ plan of conversion. If you received a Proxy Card(s), but have not voted, please do so. If you have questions about voting, call our Information Center, toll-free, at 1-(877) - , Monday through Friday, 10:00 a.m. to 4:00 p.m., Eastern Time.

Our eligible customers as of __________, 2016 were mailed a Proxy Card(s) and other materials requesting them to cast votes on Community Savings’ plan of conversion.

If you received a Proxy Card(s) but have not voted, please vote by mail, or by following the Internet voting instructions on the Proxy Card(s). We hope that you will vote “FOR” the Plan as recommended by our board of directors. If you have questions about voting, please call our Information Center, toll-free, at 1-(877) - , Monday through Friday, 10:00 a.m. to 4:00 p.m., Eastern Time.

Our eligible customers as of __________, 2016 were mailed Proxy Card(s) and other materials requesting them to cast votes for Community Savings’ plan of conversion. If you have not yet voted, a quick way to do so is to click on “Vote Now”. This will lead you to a confidential voting site.

Thank you for taking a few minutes to cast your vote online. Please have your Proxy Card in hand so that you can enter the 12 digit control number printed on your Proxy Card.

(Email reminder is best sent after initial contacts, but before most people will have discarded materials.)

If you were a Community Savings customer on __________, 2016, you recently received a large white envelope containing proxy materials requesting your vote on our plan of conversion (the “Plan”).

If you have not yet voted, please promptly vote each Proxy Card you received. None are duplicates! Proxy Cards describe the simple procedures for voting by mail or Internet.

Without sufficient favorable votes, we cannot implement the Plan. NOT VOTING HAS THE SAME EFFECT AS VOTING "AGAINST" THE PLAN.

Please call our Information Center, toll-free, at 1-(877) ___-____, Monday through Friday, 10:00 a.m. to 4:00 p.m., Eastern Time.

Community Savings Bancorp, Inc. is conducting an offering of its common stock. Shares may be
purchased directly from Community Savings Bancorp, Inc., without sales commission, during the
offering period.

This advertisement is neither an offer to sell nor a solicitation of an offer to buy shares of common stock. The offer is made only by the Prospectus. These securities are not deposits or savings accounts and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

VOTE BY INTERNET		VOTE BY MAIL
WWW.MYPROXYVOTECOUNTS.COM
Use the Internet to vote your
proxy. Have your Proxy Card		þ Mark, sign and date your
in hand when you access the	OR	Proxy Card and return it in
website. You will be prompted to		the postage-paid Proxy Reply
enter online your 12 digit control		Envelope provided.
number, located in the shaded box
above. Each Proxy Card has a
unique control number.

Stock Registration (please review carefully)		Other Order Information:
Name1		Batch #: _____
Name2		Order #: _____
Street1		Number of Shares Requested: _________
Street2		Offering Category: _____
City, State Zip		(subject to verification; see descriptions below)
Ownership:
Social Security / Tax ID #: