The health line on a Kenyan payslip used to be one of seventeen fixed amounts depending on a salary band. Since 1 October 2024 it's a straight 2.75% of gross pay, no bands, no cap. That single change, from a table lookup to a percentage, is why so many people did a double take at their first post-2024 payslip: the deduction moved, sometimes down, sometimes sharply up, and the reason has nothing to do with a payroll error.
This piece lines up the old NHIF system against SHIF, the fund that replaced it, works out exactly who ended up paying more and who ended up paying less, and explains the law behind the switch.
What changed on your payslip
The deduction itself changed from a banded flat amount to a percentage of gross pay. NHIF charged one of several fixed shilling amounts, from KES 150 to KES 1,700, depending on which salary bracket an employee fell into. SHIF charges 2.75% of gross pay directly, with a floor of KES 300 and nothing above.
The name on the payslip changed too, though not everyone's payroll caught up immediately. The National Hospital Insurance Fund gave way to the Social Health Insurance Fund, administered by a new body, the Social Health Authority, under a new law: the Social Health Insurance Act, 2023. The deadline for remitting it stayed the same, the 9th of the month following payroll, and it's still a pre-tax deduction that lowers taxable income before PAYE is worked out, exactly as NHIF was.
How NHIF calculated your contribution
NHIF ran on a table gazetted in February 2015 and never revised again before the fund closed. Seventeen bands covered incomes from under KES 6,000 to over KES 100,000, and the amount was fixed within each band regardless of where an employee sat inside it.
| Gross income (KES) | Monthly NHIF |
|---|---|
| 0–5,999 | 150 |
| 6,000–7,999 | 300 |
| 8,000–11,999 | 400 |
| 12,000–14,999 | 500 |
| 15,000–19,999 | 600 |
| 20,000–24,999 | 750 |
| 25,000–29,999 | 850 |
| 30,000–34,999 | 900 |
| 35,000–39,999 | 950 |
| 40,000–44,999 | 1,000 |
| 45,000–49,999 | 1,100 |
| 50,000–59,999 | 1,200 |
| 60,000–69,999 | 1,300 |
| 70,000–79,999 | 1,400 |
| 80,000–89,999 | 1,500 |
| 90,000–99,999 | 1,600 |
| 100,000 and above | 1,700 |
The last row did all the work at the top end. Someone earning KES 120,000 paid the same NHIF as someone earning KES 2 million, because the table stopped at 1,700 and never asked for more, however high a salary went above that line.
How SHIF calculates it now
SHIF drops the table entirely and applies 2.75% of gross pay directly, with a KES 300 floor for anyone whose 2.75% would come out lower and no ceiling for anyone whose wouldn't. There's no band to look up, no bracket to fall into: the calculation is the same multiplication whether gross pay is KES 15,000 or KES 1.5 million. The SHIF Calculator Kenya runs that multiplication for any figure, including the minimum-rule check, in a few seconds.
Who pays more, who pays less
Run the same salaries through both systems and a clear pattern shows up: the middle of the income scale did well out of the switch, and both ends of it didn't.
| Gross pay (KES) | Old NHIF | SHIF now | Difference |
|---|---|---|---|
| 5,000 | 150 | 300 | +150 |
| 8,000 | 400 | 300 | -100 |
| 15,000 | 600 | 413 | -187 |
| 20,000 | 750 | 550 | -200 |
| 30,000 | 900 | 825 | -75 |
| 40,000 | 1,000 | 1,100 | +100 |
| 60,000 | 1,300 | 1,650 | +350 |
| 100,000 | 1,700 | 2,750 | +1,050 |
| 200,000 | 1,700 | 5,500 | +3,800 |
Anyone earning under about KES 6,000 a month is worse off in a way that looks like a rounding error but isn't: NHIF's bottom band was only KES 150, while SHIF's floor is double that at KES 300. Between roughly KES 6,000 and KES 32,700, SHIF is usually equal to or cheaper than the old NHIF band would have been. Past KES 32,700, the two systems cross over, and SHIF keeps climbing while NHIF would have stayed capped at 1,700 forever. By KES 200,000 a month, the gap is KES 3,800, and it only widens from there, since nothing stops SHIF's 2.75% once gross pay keeps rising.
Why the government replaced NHIF
NHIF hadn't been rebuilt since 1966, and its rate table hadn't moved since 2015. A flat KES 1,700 ceiling meant the fund's income barely grew even as the country's top earners did, and its outpatient and specialist cover stayed thin for anyone who couldn't top it up privately. The Social Health Insurance Act, 2023, alongside the Primary Health Care Act and the Digital Health Act, replaced NHIF with three separate funds instead of one: SHIF itself, which takes the 2.75% and pays for inpatient, specialist, and surgical care; the Primary Healthcare Fund, paid for by government allocation rather than payroll deductions, which covers basic outpatient and preventive care for every registered person whether or not their SHIF contributions are current; and the Emergency, Chronic and Critical Illness Fund, which picks up dialysis, cancer treatment, and other sustained care once a person's SHIF cover for the year runs out.
The rollout wasn't smooth. The High Court declared the three Acts unconstitutional on 12 July 2024 for skipping proper public participation, though it suspended that ruling for 120 days rather than killing the law outright. The Court of Appeal stayed the High Court's decision on 20 September 2024. That cleared the way for SHA to start operating on 1 October 2024 as originally planned. It's the same sequence, court challenge followed by a stay followed by implementation, that the Affordable Housing Levy went through around the same period; both reforms landed on payslips within months of each other after near-identical legal detours.
What SHIF covers that NHIF didn't
The benefit package expanded alongside the funding model. Primary care at Level 2 and 3 facilities is free through the Primary Healthcare Fund for every registered person, contribution status aside, which NHIF never offered outright. Mental health treatment, counselling, and substance use disorder care are explicitly covered under SHIF, an area NHIF left largely untouched. Dialysis is covered at a set tariff of roughly KES 10,650 a session under the Emergency, Chronic and Critical Illness Fund, and once diagnosed, chronic conditions like cancer, kidney failure, and sickle cell disease move to that fund automatically rather than draining an individual's annual SHIF limit.
What stayed the same
Employers still deduct and remit by the 9th of the following month, still get held liable if they don't, and SHIF still reduces taxable income before PAYE is calculated, the same treatment NHIF had. Registration still runs through payroll for the employed and through a separate declared-income process for the self-employed and informal sector, now managed on the sha.go.ke portal instead of NHIF's old branch network. And plenty of people still call it NHIF out of habit; the deduction on the payslip is what changed, not the reflex to name it.
Checking your own number
Working out where a specific salary lands is faster than reading the Social Health Insurance Act itself, which is available in full at Kenya Law for anyone who wants the source text. The SHIF Calculator Kenya applies the 2.75% rate and the minimum automatically, and since SHIF affects taxable income, the PAYE Calculator Kenya 2026 shows the knock-on effect on the rest of the payslip in the same pass.