SHIF replaced NHIF in a way that changed considerably more than the name. Here is exactly how the 2.75% is computed, what earnings it applies to, whether it is deductible before PAYE, and the three places payrolls most often get it wrong.
When the Social Health Insurance Fund (SHIF) replaced the National Hospital Insurance Fund (NHIF), it did more than change the name on the payslip. It changed the basis of the contribution, the population it applied to, and the way the deduction interacted with the rest of the payroll calculation. For payroll teams, that meant rebuilding a calculation most people had on autopilot.
The 2.75% rule
SHIF is calculated as 2.75% of an employee’s gross monthly salary. Unlike the old NHIF, which used a banded structure with fixed amounts, SHIF is a straight percentage. There is no tier table to look up and no cap on the contribution for most earners. The higher the salary, the higher the contribution, and the calculation is the same for everyone.
The contribution is split between the employee and the employer, with each side responsible for their portion. The employee portion is deducted from salary; the employer portion is an additional cost to the business. Both must be remitted together by the statutory deadline.
What counts as gross salary
The most common error is applying the 2.75% to the wrong earnings base. SHIF is calculated on gross salary, which means basic pay plus all regular allowances that are part of the employee’s monthly earnings. It is not calculated on net pay, and it is not reduced by other deductions first.
If your payroll treats SHIF as deductible before PAYE, the order of operations matters. The contribution is deducted from gross salary to arrive at the taxable pay used for PAYE. Getting this sequence wrong changes both the SHIF amount and the PAYE amount, and the error compounds across the team.
Three places payrolls get it wrong
First, applying the contribution to a capped or reduced base instead of the full gross salary. Second, deducting it after PAYE instead of before, which changes the tax calculation. Third, failing to remit the employer portion alongside the employee portion, which creates a separate liability and penalty exposure.
How to verify your calculation
A reliable payroll review checks the contribution base, confirms the deduction is treated correctly when PAYE is calculated, and compares the resulting amount against the statutory return. Small differences repeated across a team can become an expensive month-end problem, and a difficult one to unwind after payments have been made.
The simplest control is to run the calculation for a sample of employees, document the working papers, and compare the result to the payslip before the payroll is approved. If the numbers match, the system is working. If they do not, it is easier to fix one period than to restate several.