These calculators are built using publicly available police
regulations, published pay circulars, and transparent
calculation assumptions that can be reviewed and updated as
official publications change.
Tax logic uses standard UK income tax and National Insurance
band assumptions for estimation purposes, with clear recognition
that individual payroll outcomes can vary by pay period and
personal circumstances.
Pension models use published accrual and contribution
methodology assumptions relevant to police pension structures,
including context for the 1987, 2006 and 2015 schemes where
applicable.
Calculations are designed to run in-browser so users can test
scenarios without submitting personal payroll data for routine
estimates. This supports privacy-first use while keeping
methodology visible and understandable.