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 500,000 in Kenya (2026)
A KSh 500,000 91-day Treasury Bill earns about KSh 9,073 after 15% tax. A 364-day bill earns about KSh 35,104. Rates are the CBK auction averages as of 5 November 2026.
Figures last updated 5 November 2026. Based on CBK average auction rates.
KSh 500,000 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 489,325 | KSh 10,675 | −KSh 1,601 | KSh 9,073 |
| 182-day T-Bill 15% withholding tax | 8.845% | KSh 478,880 | KSh 21,120 | −KSh 3,168 | KSh 17,952 |
| 364-day T-Bill 15% withholding tax | 9.0282% | KSh 458,701 | KSh 41,299 | −KSh 6,195 | KSh 35,104 |
| Infrastructure Bond (IFB) Tax-free, 1-year illustration | 12.82% | KSh 443,184 | KSh 56,816 | KSh 0 | KSh 56,816 |
| Fixed Coupon Bond (FXD) 15% tax, 1-year illustration | 12.87% | KSh 442,988 | KSh 57,012 | −KSh 8,552 | KSh 48,461 |
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 500,000 T-Bill FAQs
How much do I earn on a KSh 500,000 91-day T-Bill in Kenya?
At the 8.75% average rate, a KSh 500,000 91-day T-Bill costs about KSh 489,325 today. It matures at KSh 500,000, giving KSh 10,675 gross interest, or about KSh 9,073 after 15% withholding tax.
Which earns more on KSh 500,000: a 91-day or a 364-day T-Bill?
Net interest is about KSh 9,073 over 91 days and KSh 35,104 over 364 days, but your money is locked up longer for the 364-day bill. The 182-day bill earns about KSh 17,952.
Is interest on KSh 500,000 in an infrastructure bond taxed?
No. Interest on infrastructure bonds is tax-free. As a one-year illustration at 12.82%, KSh 500,000 would earn about KSh 56,816. 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.