Use the right pay period
Payslips usually cover a fixed period or have a cut-off date, and many shift jobs pay in arrears. Only include the shifts that fall inside the dates on your payslip.
If the numbers don't match
A small difference can be a rounding or holiday line. A missing shift or a wrong rate usually shows up as a gap of a whole shift's pay. See how to check your payslip and how to chase unpaid wages.
This tool gives an estimate based on UK rules as of October 2026. It isn't legal or tax advice.