For a salaried Kenyan in the 30% tax bracket with a 5-year-plus horizon, the Infrastructure Bond is the highest tax-equivalent passive return widely available. Coupons of 12-15% nominal, sovereign-backed by the Central Bank of Kenya, paid out semi-annually, and fully exempt from income tax. That last detail is what makes IFBs structurally different from every other Kenyan debt instrument and from most equity alternatives on a tax-adjusted basis.
This guide walks through what they are, why the tax exemption matters more than the headline coupon, who should hold them, how to actually buy one, and the risks that the marketing material won't lead with.
What an Infrastructure Bond actually is
Kenyan Infrastructure Bonds are debt securities issued by the Central Bank of Kenya on behalf of the National Treasury, with proceeds earmarked for infrastructure projects (roads, rail, energy, water). Legally they are similar to ordinary Treasury bonds, but the Income Tax Act gives them a specific exemption for coupon income that sets them apart.
Tenors range from 3 to 25 years. Recent issues in 2024 and 2025 have clustered around 8 to 17 years. Coupons are paid every six months at a fixed rate determined at the auction; CBK publishes the rate and the term sheet in a prospectus 2-4 weeks before each auction.
Why coupons are tax-free
The Income Tax Act schedule on exempt income lists “interest income paid on Infrastructure Bonds with a tenor of three years or more issued by the Government” as exempt. Compare this with Treasury bonds (10% withholding for tenors of 10+ years, 15% for shorter), MMF distributions (15% withholding), and bank fixed deposits (15%). The IFB exemption is statutory; CBK does not deduct any tax at source.
For investors who file annual tax returns, IFB coupons are still reported as exempt income; KRA does not collect additional tax on them. Capital gains on early sale via the NSE secondary market follow normal CGT rules; for individuals, listed-security disposals currently fall outside the CGT regime.
The tax-equivalent yield calculation
The headline coupon understates how attractive an IFB really is. A 14% tax-free coupon for a 30%-bracket holder produces the same after-tax cash as a 20% taxable yield. The simple formula is:
tax-equivalent yield = tax-free coupon ÷ (1 − tax rate)
Worked through for a 14% IFB coupon at different tax brackets:
- 10% bracket: 14% ÷ 0.90 = 15.6% taxable equivalent.
- 20% bracket: 14% ÷ 0.80 = 17.5% taxable equivalent.
- 25% bracket: 14% ÷ 0.75 = 18.7% taxable equivalent.
- 30% bracket: 14% ÷ 0.70 = 20.0% taxable equivalent.
- 32.5% bracket: 14% ÷ 0.675 = 20.7% taxable equivalent.
At the 30% PAYE bracket and above, almost no other passive vehicle is competitive on a strict tax-adjusted basis. The closest contender is NSSF Tier II voluntary top-up (which is tax-deductible at the contribution side rather than tax-free at the coupon side) and a well-managed equity sleeve over a 10-year-plus horizon (which carries volatility the IFB does not).
If you are in the 10-20% bracket, the picture is less dramatic but still favourable. For a starter or junior salaried Kenyan, an infrastructure bond is still likely the highest-quality long-term passive vehicle available without the lock-up of NSSF Tier II.
Who Infrastructure Bonds suit
Infrastructure Bonds are an ideal core holding for several archetype-and-situation combinations.
Salaried builder, 25%+ tax bracket, 5-15 year horizon. This is the canonical case. Tax exemption multiplies into a 20%-plus tax-equivalent yield. Coupons reinvested or used to fund contributions to other vehicles. We typically recommend 25-40% of the long-horizon allocation for this profile.
Wealth-tier investor, 30%+ tax bracket, multi-vehicle portfolio. IFBs anchor the fixed-income sleeve. Diversify across 3-5 different IFB issues to spread the rate-cycle exposure; a portfolio with all coupons set in 2024 will roll forward differently than one set in 2026.
Diaspora investor with KES family obligations. Unlike US-equity ETFs (where dividends carry US WHT and the asset is USD-denominated), an IFB is a clean KES instrument with no withholding. Useful for diaspora users matching KES liabilities. Open the CDS account during a home visit; auctions can be bid into electronically thereafter.
Who should not over-allocate
IFBs are not appropriate as the dominant holding for any of these cases:
- Short horizon (under 3 years). The 5-25-year tenor lock means you carry secondary-market price risk for short-horizon needs. Use MMFs or T-bills instead.
- Need for monthly income. Coupons pay semi-annually. If you depend on monthly cash flow, a REIT or MMF distribution is more appropriate.
- Sharia-compliance constraint. Conventional interest-bearing bonds are not Sharia-compliant. Look at Sharia-compliant MMFs (Old Mutual Halal, Equity Bank Halal) and Takaful options.
How to actually buy an Infrastructure Bond
The mechanics are simpler than the marketing material implies, but require a CDS account opened once with a commercial bank.
1. Open a CDS account. Visit any commercial bank with your KRA PIN, ID, and a recent passport-size photo. Most banks complete the application in one visit; the CDS account number arrives within 5-10 business days. There is no annual fee. Diaspora users can open a CDS during a Kenya visit; some banks also support remote opening with notarised documents.
2. Watch CBK's issue calendar. CBK publishes a prospectus 2-4 weeks before each Infrastructure Bond auction at centralbank.go.ke/bills-bonds/treasury-bonds. The prospectus names the tenor, the indicative coupon range, the auction date, and the value date.
3. Submit a bid through your bank. Bids are either competitive (you specify your desired yield) or non-competitive (you accept the weighted-average yield from the auction). For retail-size bids of KES 50,000 to KES 5 million, a non-competitive bid is usually appropriate. The bank submits your bid to CBK on your behalf.
4. Settlement. If your bid is successful, CBK debits your account on the value date. The bond is held in your CDS account. Coupon payments are credited automatically every six months to the bank account linked to your CDS.
5. Hold or sell. Hold to maturity for the full coupon stream and face-value redemption. Sell early on the NSE secondary market via a licensed broker (any major NSE participant) if your situation changes. Secondary-market liquidity for IFBs is usually adequate for retail-size positions; large blocks may need more time to fill.
The IFB ladder strategy
For investors with KES 200,000 or more to deploy in the asset class, a ladder smooths out reinvestment risk. The strategy: split your allocation across 3-4 different IFB issues so that not every coupon is set at the same point in the rate cycle, and so the maturities are staggered.
Example ladder for KES 1,000,000 deployed in 2026:
- KES 250,000 in an 8-year IFB (matures 2034), anchors the medium horizon.
- KES 250,000 in an 11-year IFB (matures 2037), captures longer-tenor coupon.
- KES 250,000 in a 17-year IFB (matures 2043), locks the longest current rate available.
- KES 250,000 reserved for the next IFB issue (2026 Q3 or Q4), avoids putting all capital in at one auction.
At maturity, the matured tranche rolls into a fresh IFB or into the higher-yield instrument the next-decade rate environment offers.
The risks the marketing won't lead with
IFBs are sovereign-backed and tax-free, but they are not risk-free. Three honest concerns worth naming.
Interest-rate risk on early sale. If you need liquidity before maturity and rates have risen since you bought, you sell at a discount. A bond bought at 14% in a 14% market that you sell into a 17% market trades at roughly 80% of face value (depending on tenor). Hold to maturity and this disappears; sell early and it is real.
Sovereign credit risk. The bonds are guaranteed by the Government of Kenya. KE sovereign debt has been downgraded by major rating agencies in recent years to non- investment-grade. The probability of default on KES-denominated sovereign paper is low (the government can print KES) but the path is currency depreciation rather than default in extremis. Kenyans bear that risk through inflation and FX moves, not through coupon haircuts.
Concentration in single issues. A single Infrastructure Bond is one issuer (the Government of Kenya), one coupon-set date, and one maturity. The ladder strategy mitigates the maturity dimension; the issuer concentration is unavoidable for any KE government bond holder. Diversification away from KES sovereign exposure means equities, real estate, or US-USD instruments, none of which carry the IFB tax exemption.
Where this fits in a full portfolio
For most 30%+ tax-bracket Kenyans with a 5-year-plus horizon, an Infrastructure Bond should be the largest single passive allocation, typically 25-40% of total. Pair with:
- A liquidity buffer in a top MMF (3-6 months of expenses).
- An equity sleeve (NSE basket plus a global / US ETF) for horizons of 5+ years to capture growth that bonds do not.
- NSSF Tier II top-up if salaried, the deduction is a complementary tax tool to the coupon exemption.
This is the structure the calculator assembles for the Builder archetype with light effort. See the decision guide for the full framework.
Where this guide's data comes from
Yields and issuance schedule: CBK auction results and Infrastructure Bond prospectuses, current to early May 2026. Tax treatment: Income Tax Act schedule, KRA published guidance, Finance Act 2025. Tax-equivalent calculations: standard formula. CDS account mechanics: CBK depository operating procedures and commercial bank documentation.
This is editorial. We are not CMA-licensed financial advisors. For investments above KES 5 million or for tax planning across multiple structures, consult a CMA-licensed advisor or a trusts lawyer.