If your payslip shows PAYE tax as a minus figure, your employer is refunding tax to you rather than deducting it. It happens because UK payroll recalculates your tax every pay period against your total earnings and allowances since 6 April, and when the running total shows you’ve paid too much, the surplus comes back on your next payslip as a negative number. That amount is added to your net pay, so your take-home for the month goes up.
Why Payroll Refunds Tax Automatically
PAYE runs on a cumulative basis. Rather than treating each payslip in isolation, your employer’s software adds up everything you’ve earned since the start of the tax year and compares it against the tax-free allowance you’ve built up over the same period. It then works out how much tax you should have paid so far and checks that against how much has actually come out of your wages. If more has been deducted than the year-to-date figures justify, the difference is refunded through payroll on the next pay run.1Legislation.gov.uk. The Income Tax (Pay As You Earn) Regulations 2003
You don’t have to file anything or ring anyone for this to happen. The correction is built into the way PAYE is designed to work in-year.
What Usually Causes the Minus Figure
A handful of everyday situations tip the cumulative calculation in your favour.
Starting a new job partway through the tax year. If you weren’t working for the first few months of the year, you’ve been quietly accumulating unused tax-free allowance the whole time. Once your new employer processes you on a cumulative code, the payroll recognises that backlog and refunds the excess across one or more pay periods.
Coming off an emergency tax code. Emergency codes end in W1, M1, or X (for example, 1257L W1) and tax you as though the current week or month is typical of the whole year, ignoring your actual year-to-date earnings.2GOV.UK. Tax Codes: Emergency Tax Codes That usually overtaxes you. When HMRC issues your correct cumulative code, the payroll recalculates back to 6 April and refunds the overpayment, which can be substantial if the emergency code has been running for several months.
Late P45 processing. If your new employer didn’t have your P45 when you started and put you on an emergency code, the correction lands once your P45 details are entered.3GOV.UK. Your P45, P60 and P11D Form
A revised tax code from HMRC. If your circumstances change mid-year and HMRC issues an updated code, the payroll recalculates cumulatively and any overpayment flows back.
A drop in earnings. Taking unpaid leave, cutting hours, or moving to a lower-paying role can mean the tax already deducted is more than you’ll owe for the year at your new pace.
What It Does to Your Take-Home Pay
When PAYE is negative, the usual payslip arithmetic flips. The refund is added rather than subtracted, so your net pay for that period will be noticeably higher than normal. Sometimes it exceeds your gross pay for the month, which looks strange until you remember the refund covers tax overpaid across earlier periods, not just this one.
You’re not being paid extra. The money was always yours; it was collected too early, and the payroll is settling up. Once the cumulative figures balance out, your deductions should return to normal on later payslips.
How to Check the Refund Is Right
A minus PAYE entry is usually legitimate, but a large one is worth verifying. Start with your tax code. For most people with one job and no complications, the standard code for 2025–26 and 2026–27 is 1257L, reflecting the £12,570 Personal Allowance.4GOV.UK. Understanding Your Employees’ Tax Codes5GOV.UK. Income Tax Rates and Personal Allowances The numbers in your code tell your employer how much you can earn tax-free.6GOV.UK. Tax Codes: What Your Tax Code Means If the code looks wrong, that’s often where the issue sits.
Useful documents to gather:
- Your recent payslips, focusing on the year-to-date figures for gross pay and tax, not just the current month.
- Your P45 if you recently changed jobs, which carries the cumulative pay and tax figures from your previous employer.3GOV.UK. Your P45, P60 and P11D Form
- Your P60, showing total pay and tax for the previous tax year, useful for spotting whether an overpayment carried over.7GOV.UK. Your P45, P60 and P11D Form: P60
- Your PAYE coding notice (form P2), which breaks down how HMRC calculated your code.
A rough self-check: take your cumulative gross pay, subtract the share of the £12,570 allowance covering the months so far, then apply 20% to the remainder (or 40% on anything above £50,270). If the tax already deducted is higher than that figure, the difference is your legitimate refund.5GOV.UK. Income Tax Rates and Personal Allowances
What to Do If the Tax Code Looks Wrong
If the refund looks off, or your code doesn’t match your circumstances, the quickest fix is HMRC’s personal tax account. Once signed in you can see your current code, check your Income Tax estimate, update employment or benefits information, and claim a refund if one is owed.8GOV.UK. Personal Tax Account
If that doesn’t resolve it, call HMRC’s Income Tax helpline on 0300 200 3300 (Monday to Friday, 8am to 6pm). The digital assistant on GOV.UK can also handle PAYE and tax code queries and pass you to an adviser if needed.
When HMRC updates your code, they send a new coding notice to you and your employer. Your employer can’t change your code on their own; they can only apply what HMRC tells them to use. It’s worth checking with payroll that the new code has actually been entered, because a corrected code sitting unopened doesn’t help your next payslip.
If the Overpayment Isn’t Corrected In-Year
Not every overpayment gets resolved before the tax year ends. If your code was wrong all year, or if you had multiple jobs and the allowance was split incorrectly, HMRC reconciles your records after 5 April and sends a P800 tax calculation if you’ve overpaid. Depending on what the P800 says, you may need to claim the refund online; if you don’t, the money stays on your tax record rather than being sent automatically. Where the P800 promises a cheque, it should arrive within 14 days.
If you’ve stopped working partway through the year and don’t expect further taxable income, you can claim an in-year refund using form P50 instead of waiting for the P800 process to catch up.