Filed Under Rule 424(b)(3), Registration Statement No. 333-221261

Pricing Supplement Number 494 - Dated Monday, April 13, 2020 (To: Prospectus Dated November 1, 2017 and Prospectus Supplement Dated November 3, 2017)

CUSIP Number

Principal Amount

Selling Price

Gross Concession

Net Proceeds

Coupon Type

Coupon Rate

CouponFrequency

Maturity Date

1st Coupon Date

1st Coupon Amount

Survivor's Option

Product Ranking

63743FK96

[]

100%

1.450%

[]

Fixed

2.100%

MONTHLY

04/15/2027

05/15/2020

$1.28

Yes

Senior Unsecured Notes

National Rural Utilities Cooperative Finance Corp Offering Date: Monday, April 13, 2020 through Monday, April 20, 2020 Trade Date: Monday, April 20, 2020 @12:00 PM ET Settle Date: Thursday, April 23, 2020 Minimum Denomination/Increments:$1,000.00/$1,000.00 Initial trades settle flat and clear SDFS: DTC Book Entry only DTC number: 0235 via RBC Dain Rauscher Inc. Agents: Incapital, LLC, Citigroup, J.J.B. Hilliard, W.L. Lyons, Inc., Wells Fargo Advisors, RBC Capital Markets Trustee: U. S. Bank National Association
If the maturity date or an interest payment date for any note is not a Business Day (as term is defined in Prospectus), principal, premium, if any, and interest for that note is paid on the next Business Day, and no interest will accrue from, and after, the maturity date or interest payment date. InterNotes® is a registered trademark of Incapital Holdings, LLC. All rights reserved. National Rural Utilities Cooperative Finance Corp Prospectus Dated 1-Nov -17 and
 Prospectus Supplement Dated:  3-Nov 2017