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Every tool here works to the current tax year's rates and thresholds, and each one is tested figure by figure against the published statutory rates before it ships. They come from the team behind Moonworkers, HMRC recognised payroll software. No account, no email, no limit on how many times you run them.
Pay, tax and pensions
Net pay for any UK salary, after tax and National Insurance.
The optimum director salary on the annual NI basis.
What a tax code means and the free pay it gives.
The right rate by age, with an employer compliance check.
Assess a worker and work out the minimum contributions.
Statutory pay and leave
SSP from the first qualifying day under the 2026 rules.
SMP across the full 39 weeks, payslip by payslip.
One or two weeks of SPP, with the eligibility tests.
Rolled-up pay and the 52-week average for irregular hours.
Statutory entitlement for joiners, leavers and part-timers.
These calculators answer one question at a time. Moonworkers applies the same rules to every employee on every payrun, submits your RTI on time and produces compliant payslips, so sick pay, maternity pay and pension contributions are worked out before you think to check them.