Kenya Finance CalculatorOctober 2026
Calculators are for planning and estimation only. Verify final tax, payroll, loan, investment or property figures with the relevant institution or adviser.
Banking / T-Bill returns by amount
T-Bill Returns on KSh 400,000 in Kenya (2026)
A KSh 400,000 91-day Treasury Bill earns about KSh 7,259 after 15% tax. A 364-day bill earns about KSh 28,083. Rates are the CBK auction averages as of 5 November 2026.
Figures last updated 5 November 2026. Based on CBK average auction rates.
KSh 400,000 face value: returns by security
Face value is the amount you receive at maturity. Rates as of 5 November 2026.
| Security | Rate | You pay now | Gross interest | Tax | Net interest |
|---|---|---|---|---|---|
| 91-day T-Bill 15% withholding tax | 8.75% | KSh 391,460 | KSh 8,540 | −KSh 1,281 | KSh 7,259 |
| 182-day T-Bill 15% withholding tax | 8.845% | KSh 383,104 | KSh 16,896 | −KSh 2,534 | KSh 14,362 |
| 364-day T-Bill 15% withholding tax | 9.0282% | KSh 366,961 | KSh 33,039 | −KSh 4,956 | KSh 28,083 |
| Infrastructure Bond (IFB) Tax-free, 1-year illustration | 12.82% | KSh 354,547 | KSh 45,453 | KSh 0 | KSh 45,453 |
| Fixed Coupon Bond (FXD) 15% tax, 1-year illustration | 12.87% | KSh 354,390 | KSh 45,610 | −KSh 6,841 | KSh 38,768 |
Estimates using CBK average auction rates, not a guaranteed return. Bond rates are from the 5 October 2026 auction and use a one-year simplification; real bonds pay coupons over several years. See the T-Bill calculator or the T-Bills vs bonds guide.
Quick Answers
KSh 400,000 T-Bill FAQs
How much do I earn on a KSh 400,000 91-day T-Bill in Kenya?
At the 8.75% average rate, a KSh 400,000 91-day T-Bill costs about KSh 391,460 today. It matures at KSh 400,000, giving KSh 8,540 gross interest, or about KSh 7,259 after 15% withholding tax.
Which earns more on KSh 400,000: a 91-day or a 364-day T-Bill?
Net interest is about KSh 7,259 over 91 days and KSh 28,083 over 364 days, but your money is locked up longer for the 364-day bill. The 182-day bill earns about KSh 14,362.
Is interest on KSh 400,000 in an infrastructure bond taxed?
No. Interest on infrastructure bonds is tax-free. As a one-year illustration at 12.82%, KSh 400,000 would earn about KSh 45,453. Real IFBs run for several years, so check the specific issue.
Why does the price I pay differ from the face value?
T-Bills are sold at a discount. You pay less than the face value now and receive the full face value at maturity; the difference is your interest. Figures here are estimates from the average auction rate, and your actual rate depends on the auction.