Average and marginal rates on your pay.
Effective rate (all deductions)
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PAYE-only rate
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Marginal band
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Total deductions
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Why your payslip stings more than the PAYE table suggests
Open the KRA PAYE schedule and the top band reads 35 percent, so most Kenyans assume that is roughly what tax costs them. It is not. Two things pull the real number in opposite directions. PAYE is progressive, so only your last shillings are taxed at the high band while your first KES 24,000 a month is sheltered by the personal relief, which drags your average rate down. Working the other way, your payslip is also docked for NSSF, the SHIF health contribution that replaced NHIF, and the Affordable Housing Levy. None of those are income tax, but they all leave your account before you see the money, so they belong in any honest measure of what your salary actually costs you. This tool reports three different rates so you can see the gap: the effective rate across every statutory deduction, the PAYE-only rate, and the marginal band that hits your next shilling.
The three rates and why they differ
Think of them as three answers to three different questions. Your marginal band answers "if I earn one more shilling, how much of it does the taxman take?" That is the figure that matters for a raise or a side gig. Your PAYE-only rate answers "what share of my gross goes to income tax alone?" And your all-in effective rate answers "what share of my gross disappears to all the mandatory deductions combined?" The all-in number is always the largest of the three, and the marginal band is usually the smallest fraction of total pay, because it only applies to the top slice. Confusing the marginal band for the effective rate is the single most common mistake people make when they complain about Kenyan tax.
A KES 120,000 salary, deduction by deduction
Take the default gross of KES 120,000 a month and follow the rates this calculator applies. NSSF is 6 percent across the two tiers but caps at KES 6,480 per side, so a high earner hits the ceiling. SHIF runs at 2.75 percent of gross with no cap, the Housing Levy at 1.5 percent of gross. Those three come off first to give taxable pay, then the monthly bands and the KES 2,400 personal relief produce the PAYE figure.
| Step | Basis | Amount |
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So the all-in effective rate is 36,489 divided by 120,000, or about 30.4 percent. The PAYE-only rate is 24,909 over 120,000, about 20.8 percent. And the marginal band is 30 percent, because taxable pay of KES 108,420 sits inside the third band. Three numbers, all correct, all describing the same payslip. The chart below shows how far apart they sit.
A practical tip: when you negotiate a raise, judge it against the marginal band, not the effective rate. A KES 20,000 bump at this salary level is taxed at 30 percent on the PAYE side plus SHIF and the Housing Levy on the gross, so you keep noticeably less of the raise than your headline effective rate implies. Every rate, band and cap above is the figure this calculator applies under the post Finance Act 2025 position. Kenya has reshuffled these contributions repeatedly in recent years, so confirm the current numbers on the KRA website before you rely on them.
Do NSSF and SHIF really count as tax?
Strictly they are contributions, not taxes. NSSF buys you a pension entitlement and SHIF funds your health cover, so you get something back, unlike PAYE. But they are compulsory and they reduce your take-home, which is why this tool folds them into the effective rate. If you only want the pure income-tax burden, read the PAYE-only figure instead.
Why is my effective rate lower than a colleague on the same band?
Because reliefs and deductions differ. If you contribute to a registered pension scheme, pay a qualifying mortgage, or claim insurance relief, your taxable pay falls and your effective rate drops even though you share the same marginal band. The personal relief of KES 2,400 a month is the one everyone gets, but the others depend on your own circumstances.