Quick calculators for the questions that come up between pay runs. Each one shows how the figure is worked out and links to the guide behind it.
Statutory Pay
SSP Calculator 2026/27
Statutory Sick Pay under the April 2026 rules: no waiting days, and the lower of £123.25 a week or 80% of average weekly earnings.
Statutory Pay
SMP Calculator 2026/27
Statutory Maternity Pay from average weekly earnings: the weekly amounts for weeks 1 to 6 and 7 to 39, and the 39-week total.
National Insurance
Employer NI Calculator 2026/27
Employer and employee National Insurance for a pay period, by NI category, and the total cost of employing someone.
National Insurance
Directors' NI Calculator 2026/27
National Insurance on a director's payment using the annual method, with thresholds pro-rated for a mid-year appointment.
Tax Periods
Tax Week and Tax Month Calculator
Enter a pay date to find its tax year, tax week and tax month, and whether it falls in week 53.