Kenya Pension Calculator

Background.

Two figures on a Kenyan payslip quietly decide what retirement looks like: the pension deduction you can see, and the employer contribution that usually never appears on it. At KSh 180,000 of pensionable pay with 10 percent from each side, KSh 36,000 goes into the scheme every month. Kept up for 20 years at a 7 percent net return, on top of KSh 250,000 already saved, that grows to about KSh 19.24 million, and more than half of it, roughly KSh 10.35 million, is investment growth rather than money paid in.

Retirement saving in Kenya runs on more than one track. NSSF contributions are compulsory and follow their own rules, with a separate calculator. On top of that, many employees belong to an occupational or umbrella scheme through their employer, and the self-employed, or anyone wanting more, can join an individual pension plan. All of these are regulated by the Retirement Benefits Authority under the Retirement Benefits Act. Most are defined contribution schemes, which RBA describes as schemes where member and employer contributions are fixed as a percentage of pensionable earnings or a shilling amount, and the benefit is whatever those contributions, net of expenses, have grown to. That is the arrangement modelled here.

Tax relief makes the employee's share cheaper than it looks. Under the Income Tax Act as revised to December 2024, contributions to a registered pension or provident fund or a registered individual retirement fund are deductible up to KSh 30,000 a month, KSh 360,000 a year, and the calculator also applies a percent-of-income cap, 30 percent by default. A KSh 18,000 contribution relieved at a 30 percent marginal PAYE rate takes about KSh 12,600 out of take-home pay, not KSh 18,000.

The result is a projection under assumptions you choose: a steady return, level contributions and a flat charge. Returns vary from year to year, salaries change and inflation erodes what a shilling buys, so the useful way to read it is to run a few versions side by side.

What is kenya pension calculator?

A pension projection adds up two streams of money at a future date. The first is the balance already in your account, which simply compounds. The second is the run of monthly contributions, each of which compounds for a shorter time the later it is paid. The sum is the projected retirement balance: a lump of shillings at retirement, in the money of that day.

Pensionable income is the pay your scheme applies its contribution rates to. In many schemes that is basic salary rather than gross pay, so allowances may be left out; your scheme rules or payslip will show which. The employer's rate comes from the scheme rules or your employment contract.

The tax figure is a separate calculation. The deductible part of your own contribution is the smallest of three amounts: what you actually contribute, the monthly shilling limit (KSh 30,000 by default) and the percent-of-income limit (30 percent of pensionable income by default). Multiplying that by your marginal PAYE rate estimates how much less PAYE you pay each month. The employer's contribution does not enter this figure.

How to use this calculator.

1. 01Enter your monthly pensionable income in KSh. A quick check is your payslip: divide the pension deduction by your contribution rate and you should get the pensionable pay it was worked out on.
2. 02Enter the employee and employer contribution rates as percentages of that income. For a personal individual pension plan with no sponsoring employer, set the employer rate to zero.
3. 03Enter your current balance from the latest member statement and the number of years left until your scheme's retirement age.
4. 04Enter an expected annual return and the annual charge; the projection uses the difference. The returns credited to members in past annual statements are a better starting point than a headline fund figure.
5. 05Leave the KSh 30,000 monthly limit and the 30 percent cap at their defaults unless KRA guidance has changed, and enter as the marginal rate the PAYE band your top shilling of taxable pay falls in.
6. 06Run the projection again with a lower return, a shorter period or a different contribution rate before relying on any single figure.

The formula.

Contributions come first: the employee contribution is income × employee rate, the employer contribution is income × employer rate, and the monthly total C is their sum. Tax relief is deductible = min(employee contribution, monthly limit, income × percent limit), and the estimated saving is the deductible amount × the marginal PAYE rate.

The growth rate is built in two steps. The annual charge is subtracted from the expected return to give a net annual return; 8 percent less 1 percent is 7 percent. That rate is converted to its monthly equivalent, r = (1 + net return)^(1/12) − 1, so that twelve months of compounding reproduce the annual figure exactly. For 7 percent, r is about 0.5654 percent a month, slightly less than 7 ÷ 12 = 0.5833 percent.

With n = years × 12, the current balance grows to CB × (1 + r)ⁿ and level contributions paid at the end of each month grow to C × [(1 + r)ⁿ − 1] ÷ r, the future value of an ordinary annuity. Their sum is the projected balance, PB. If the net return is zero both parts become simple addition: the balance stays where it is and the contributions add up to C × n. A charge larger than the expected return is not accepted, because the net return would be negative.

Because (1 + r)ⁿ grows exponentially, the number of years and the net return move the answer far more than the contribution amount. Cutting 20 years to 10 at the same KSh 36,000 a month gives about KSh 6.65 million, around a third of the 20-year figure, although the total paid in only halves.

Several simplifications are built in. Contributions stay level in shillings, so pay rises are ignored and the balance is understated for anyone whose salary grows. The return is constant, so the projection cannot show that a bad year just before retirement does more harm than the same year early on. Charges are a flat percentage deducted from the return, while real schemes may levy fixed fees, asset-based fees or both. Contributions are assumed to arrive at the end of each month; paying at the start would add a month's growth to each. And the balance is nominal: KSh 19.24 million in 20 years buys what about KSh 7.25 million buys today if prices rise 5 percent a year.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Retirement Benefits Authority (2025). Saving for Retirement through a registered Individual Pension Plan. RBA.
2. [2]Retirement Benefits Authority (n.d.). Types of Schemes. RBA.
3. [3]Retirement Benefits Authority (n.d.). Saving and Membership. RBA FAQs.
4. [4]Kenya Revenue Authority (n.d.). Pay As You Earn (PAYE). KRA.
5. [5]Kenya Law (2022). Retirement Benefits Act, Cap. 197. National Council for Law Reporting.
6. [6]Kenya Law (2024). Income Tax Act, Cap. 470. National Council for Law Reporting.