SHIF Contribution Calculator

Background.

When the Social Health Authority took over from NHIF on 1 October 2024, the health line on Kenyan payslips changed character. NHIF had charged a fixed amount for each income band, topping out at KSh 1,700 a month however much you earned. Its replacement, the Social Health Insurance Fund (SHIF), charges 2.75% of gross pay with no upper limit. Someone on KSh 150,000 a month went from KSh 1,700 to KSh 4,125, an extra KSh 2,425 every month.

The rule itself is short. The Social Health Insurance (General) Regulations, 2023 set the salaried contribution at 2.75% of gross salary or wage, and say the amount payable each month cannot be less than KSh 300. So the deduction is whichever is larger: 2.75% of the month's gross, or KSh 300. The two meet at a gross of about KSh 10,909. Below that the KSh 300 minimum applies; above it the deduction grows in step with pay, and from roughly KSh 61,818 upwards it exceeds the old NHIF maximum.

Enter your gross income as a monthly figure, or as an annual one that is divided by 12 before the rule is applied. You get the plain 2.75% figure, the final monthly contribution after the minimum is checked, a twelve-month total and a total for any number of months from 1 to 120. Employers can use it to check a payroll run, employees to check a payslip, and households outside formal employment to see roughly what an assessed annual income would cost.

The rate and the minimum sit in their own fields, set to the current 2.75% and KSh 300. Leave them alone for today's rules; change them only if the regulations are amended or you want to see what a proposed change would mean. What the arithmetic cannot do is decide who must register, how SHA assesses a household without a salary, or which treatments the fund covers. Those questions go to the Social Health Authority itself.

What is shif contribution calculator?

SHIF is one of three funds set up by the Social Health Insurance Act, 2023, alongside the Primary Healthcare Fund and the Emergency, Chronic and Critical Illness Fund, all administered by the Social Health Authority (SHA). The SHIF contribution is the premium a household pays into it. For a household with salaried income, the regulations make it a monthly statutory deduction of 2.75% of gross salary or wage, withheld by the employer and due by the ninth day of each month. It comes out of the employee's pay alone; unlike NSSF and the Affordable Housing Levy, there is no matching employer share. For a household without a salary, the regulations describe an annual contribution of 2.75% of household income as determined by SHA's means-testing instrument. In both cases the amount payable for each month may not fall below KSh 300.

How to use this calculator.

1. 01Enter gross income in Kenya shillings: for an employee, the gross pay figure on the payslip, the total before PAYE, NSSF, SHIF, the Housing Levy, loans or SACCO deductions come off. Take-home pay gives a figure that is too low.
2. 02Set Income period to Monthly for a salary, or to Annual for a yearly figure such as an income assessed through SHA's means test. An annual figure is divided by 12 before the 2.75% and the KSh 300 minimum are applied.
3. 03Leave Contribution rate at 2.75 and Minimum monthly contribution at 300 unless the regulations change; both fields exist so a future amendment, or a proposal you want to test, can be entered without waiting for an update.
4. 04Set Number of months to estimate to the stretch you are budgeting for, from 1 to 120. Six months of payroll, or the months left in a financial year, are common choices.
5. 05Read the percentage-based figure beside the final contribution. If the final figure is KSh 300 and the percentage-based one is lower, the minimum has been applied. When checking a payslip, a SHIF line that differs from the final figure usually means payroll used a different gross, for example one that left out an allowance or included last month's overtime.

The formula.

The contribution is a percentage with a floor: monthly SHIF = max(G × r, M). G is gross monthly income in shillings; when you choose Annual, G is your annual figure divided by 12. The rate r is the percentage you enter divided by 100, so the default 2.75% becomes 0.0275. M is the minimum monthly contribution, KSh 300 by default. The calculation first works out G × r, the percentage-based contribution, then compares it with M and keeps the larger. Totals follow from the final monthly figure: the annualised contribution is that figure × 12, and the period total is that figure × the number of months you choose.

The switch point is G = M ÷ r = 300 ÷ 0.0275, about KSh 10,909.09 a month. Above it, every extra KSh 1,000 of gross adds exactly KSh 27.50 to the deduction, and there is no ceiling: KSh 200,000 gives KSh 5,500. Below it the deduction stays at KSh 300, so the effective rate climbs as income falls; on KSh 5,000 a month, KSh 300 is 6% of pay. An income of zero still returns KSh 300, since the minimum applies whatever the income; payroll has nothing to withhold in a month with no pay, so that result shows the minimum the regulations set rather than a payslip line.

Because the floor is tested on a monthly amount, the order of steps matters when income is uneven. Someone earning KSh 40,000 a month for six months and KSh 5,000 for the other six pays KSh 1,100 six times and KSh 300 six times, KSh 8,400 in all when each month is deducted separately. Entering the year's KSh 270,000 as an annual figure averages it to KSh 22,500 a month and gives KSh 7,425, because averaging hides the months in which the floor applies. Salaried deductions happen month by month, so for uneven pay run each month on its own; the annual setting suits an income that is assessed once a year.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Ministry of Health, Kenya (2023). Social Health Insurance (General) Regulations, 2023. Government of Kenya.
2. [2]Kenya Law (2023). Social Health Insurance Act, Act No. 16 of 2023. National Council for Law Reporting.
3. [3]Kenya Law (2023). The Social Health Insurance Act, 2023. National Council for Law Reporting.
4. [4]Social Health Authority. Social Health Authority website.
5. [5]Bureau International des Poids et Mesures (2019). The International System of Units (SI Brochure), 9th edition. BIPM.