Guide
Emergency Tax: What It Is and How to Claim It Back
Emergency tax usually appears when payroll does not yet have the right cumulative tax history for you.
Quick answer
If your payslip shows W1, M1, or X, you are usually being taxed on a non-cumulative basis for that pay period.
What to check
- Check if the code includes W1, M1, or X.
- Check if this is your first payslip after starting a new job or returning to work.
- Check if your tax is much higher than expected for just one pay period.
What to do next
- Use the payslip checker to compare the current deduction.
- Update payroll with the right starter information if they are missing it.
- If you overpaid, HMRC normally refunds it through a later payslip or direct claim.
Try the tool
Use the checker if you already have a payslip. Use the calculator if you want to model take-home pay or salary-sacrifice changes before payday.