Treasury Bill Calculator (Kenya)
Free CBK Treasury bill calculator for 2026. Price a 91-, 182- or 364-day Kenya T-bill, add 15% withholding tax on the discount, and see cash to pay today versus profit at maturity.
Auction details
Defaults are CBK previous averages as of 2026-10-15. Paste the latest accepted rate.
Price = face ÷ (1 + rate × days / 365). Cash you send today is price + WHT. At maturity you receive face value. Subject to change.
Cash to pay today
Ksh —
Enter a face value and rate.
- Discounted price
- Ksh —
- Gross discount (interest)
- Ksh —
- WHT (15%)
- Ksh —
- Received at maturity
- Ksh —
- Net profit
- Ksh —
- Net annualised yield
- —
How Kenya T-bills are priced
You lend to the Government of Kenya for 91, 182 or 364 days. You buy at a discount and get face value back. Interest is the gap. 15% withholding tax on that interest is taken when you buy, so the cash that leaves your DhowCSD account is price + tax. For most resident individuals that WHT is final. Paste the latest accepted weighted-average rate from centralbank.go.ke.
Frequently asked questions
How does CBK price a Treasury bill? +
Price = face value ÷ (1 + accepted yield × days / 365). The discount is face minus price. That discount is your interest. Use the accepted weighted-average rate from the latest auction on centralbank.go.ke — the defaults here are a snapshot, not a live feed.
Is the 15% tax taken up front? +
Yes, for most investors. Withholding tax is 15% of the discount and is collected when you buy, so cash paid today is price + tax. At maturity you still receive only the face value. For many resident individuals this WHT is final. Pension schemes with an exemption certificate may pay 0%.
What is the difference between 91-, 182- and 364-day T-bills? +
All three are discount instruments sold at CBK auctions. Longer tenors usually quote a slightly higher accepted yield, but your cash is locked for longer. This calculator lets you switch tenor and paste the latest accepted rate.
How do I buy a Kenya Treasury bill? +
Open a CDSC / DhowCSD account, fund it, and bid in the weekly CBK auction — retail (non-competitive) bids commonly start at Ksh 50,000 in multiples of Ksh 50,000. Check that week’s notice on centralbank.go.ke for cut-off times.
What is the minimum T-bill investment in Kenya? +
Retail (non-competitive) bids through DhowCSD are commonly from Ksh 50,000, in multiples of Ksh 50,000, subject to CBK’s current auction notice. Competitive bids start much higher.
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