PAYE, NSSF, SHIF & the Affordable Housing Levy: A Payroll Guide for Kenyan Construction Employers

Every Kenyan employer running payroll deals with the same four statutory deductions — PAYE, NSSF, SHIF, and the Affordable Housing Levy. For construction companies working with a mix of permanent staff and casual daily-rate labour, the question that actually matters isn't just "how much" — it's "who these apply to in the first place."

This is a general overview, not tax advice — rates, bands, and reliefs are set by KRA and NSSF and are revised periodically through the Finance Act. Always confirm current figures against the latest official guidance, or a system that keeps its bands configurable rather than hardcoded.

The four deductions, briefly

• PAYE (Pay As You Earn) — income tax withheld from an employee's pay, calculated on a graduated scale.
• NSSF (National Social Security Fund) — a pension contribution, split between employee and employer.
• SHIF (Social Health Insurance Fund) — the health insurance contribution that replaced NHIF.
• AHL (Affordable Housing Levy) — a levy on gross pay, also split between employee and employer.

Where casual employment changes things

The construction industry runs heavily on casual, daily-rate labour — and that matters here. Casual workers are commonly treated differently from permanent or contract staff for statutory deduction purposes. This is exactly the kind of distinction that's easy to get wrong doing payroll by hand: it's not that the rules are complicated, it's that they need to be applied consistently, worker by worker, pay cycle after pay cycle, without anyone forgetting who's exempt and who isn't.

Overtime is part of the calculation too

A detail that's easy to miss: overtime pay generally gets folded into the same taxable base as regular earnings for a statutory-liable worker — it isn't a separate, untaxed category by default. Kenyan tax law has, at various points, included specific relief for overtime paid to lower-income earners, which is worth checking against current guidance if a meaningful share of your workforce is on overtime regularly.

Why this is worth automating, not memorizing

None of these rules are things a payroll clerk should be expected to hold in their head across every pay cycle, especially with bands and rates that get revised. The practical answer is a system where deduction rules live as configuration — bands, thresholds, and exemptions that can be updated when the Finance Act changes them, rather than logic buried in a spreadsheet formula nobody remembers writing. That's the difference between "we think this is right" and "this is calculated the same way, correctly, every single time."