Payroll applies the statutory configuration in force for the pay date: NSSF tiers, SHIF at 2.75% (minimum KES 300), Affordable Housing Levy at 1.5% each for employee and employer, and graduated PAYE bands less personal relief. NSSF, SHIF and AHL are deducted before PAYE. Rates are configurable by Helvino when the law changes.