A clear estimate beats an opaque number.
Applies the £12,570 Personal Allowance with the high-income taper, then calculates Income Tax using the England, Wales and Northern Ireland bands or the Scottish 2026–27 bands. Employee Class 1 National Insurance is estimated from the annualised monthly thresholds.
Why can it differ from a payslip?
Estimate for an employee with a standard tax code and no pension, student loan or salary-sacrifice deductions. Your payslip can differ. Bonuses, benefits, filing details, region and voluntary deductions can change the result.