More detail
The detail that trips people up is order: statutory deductions and reliefs come into the calculation before and after tax in specific ways, so a flat percentage gives the wrong answer.
For payroll, use a calculator that is kept current with the bands and the latest SHIF and NSSF rates, then keep a clear record of each payslip.
Free tools for this
Related questions
What is deducted from gross salary in Kenya?
Typically PAYE, SHIF and NSSF, and any agreed items such as a loan or pension. The net salary calculator shows the take-home after all of them.
Veira gives Kenyan shops one calm app for selling, M-Pesa, KRA eTIMS and stock, with a free terminal. Book a demo and see it set up for your trade.