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 | Coupon Frequency | 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 |