Tax on overtime explained for the 31 August 2026 bank holiday: what time and a half is really worth after deductions, with worked examples and how to check.
If you worked today, Monday 31 August, you were one of the people keeping the country running while most of it had a long weekend. And if your contract gives you a bank holiday premium, there is a fair chance you have already done the mental maths on what that shift is worth.
Here is the part nobody warns you about: the number in your head is the gross number. The tax on overtime and premium hours takes a bigger bite than most people expect, not because there is a special overtime tax, but because of where those hours sit in your pay for the year.
There is no separate overtime tax rate in the UK. Your premium hours are taxed at exactly the same rates as your normal hours, but because your tax-free personal allowance has already been used up by your basic pay, every pound of premium gets taxed from the very first penny.
That is the whole trick. People think overtime is punished. It is not. It just never gets the tax-free head start that the first £12,570 of your annual pay does.
For the 2026/27 tax year, a typical shift worker in England, Wales or Northern Ireland sits on tax code 1257L and faces two deductions on any extra pay:
Stack those together and your marginal rate is 28%. For every extra pound you earn today, you keep 72p.
That 72p figure is the single most useful number a shift worker can carry around. It turns any gross premium into a real one instantly. Someone offers you an extra shift worth £80 gross? You are deciding whether to give up your Monday for about £58.
You are on the National Living Wage of £12.71 an hour, and your contract gives time and a half on bank holidays. You worked eight hours today.
So the bank holiday was worth about £36 more than a normal Monday, not £50. Still worth having, but it is a different conversation than the one most people have in the staff room.
Hospitality often pays a bigger premium because it has to compete for people willing to work the day. Say you are on £13.20 an hour with double time for the bank holiday, and you did a nine-hour shift.
Agenda for Change pays time and a half for bank holiday work as standard, which is why NHS staff are usually the least surprised by any of this. A Band 5 at the bottom of the band earns £32,073, which works out at about £17.08 an hour across the standard 1,878 annual hours.
But most Band 5s also have a Plan 2 student loan, and at £32,073 they are comfortably over the £29,385 repayment threshold. That adds 9% on top, taking the marginal rate to 37%.
Your NHS pension tier contribution comes off as well, before income tax is worked out. That one varies by pay band, so check your payslip rather than assuming.
The 28% figure holds for the large majority of shift workers, but three situations change what the tax on overtime costs you.
You earn under the personal allowance. If you are a student, a part-timer, or someone on very few contracted hours, and your total pay for the year stays under £12,570, you pay no income tax at all. National Insurance works weekly rather than annually though, so a single big week over £242 can still trigger an 8% deduction even if your annual total is small.
You earn over £50,270. Above the upper earnings limit, National Insurance drops from 8% to 2% but income tax jumps from 20% to 40%. Net marginal rate: 42%. Overtime genuinely does get worse at this level, which is the one case where the “overtime is taxed more” instinct is correct.
You have a student loan or a pension. Plan 1 repayments start at £26,900, Plan 2 at £29,385, Plan 4 at £33,795 and Plan 5 at £25,000, all at 9% of earnings above the threshold. A postgraduate loan adds 6% above £21,000. Auto-enrolment pension contributions come off before income tax, so they soften the tax hit slightly while still reducing what reaches your bank account.
Here is what I would check first if the September payslip does not match the maths above.
Check your tax code. If it reads 1257L W1, 1257L M1 or 1257L X, you are on a non-cumulative code. Payroll treats each pay period as if it were the only one of the year, so an unusually heavy week can look, to the system, like you suddenly earn far more annually than you do. Result: over-deduction. It corrects itself, but you might be waiting until the tax year ends. If you have been on W1 or M1 for more than three months, ring payroll and ask why.
Check the premium is on the payslip at all. Bank holiday premiums are often processed as a separate line, sometimes a month in arrears. A missing premium is far more common than a mis-taxed one. Compare the hours line against your rota.
Check whether it was a premium or a day in lieu. Some contracts pay normal rate today and give you a day off later instead. That is lawful, and it means there is no premium to look for.
If the premium is genuinely missing and your contract promised it, raise it in writing with payroll inside the same pay period. Underpaid wages are an unlawful deduction, and putting it in writing starts the clock properly.
The rates behind all of this are unchanged from last year. The personal allowance is still £12,570 and stays frozen through April 2028. The higher rate threshold is still £50,270. Employee National Insurance is still 8% and 2%.
What did move for the 2026/27 year is the National Living Wage, now £12.71 an hour for workers aged 21 and over, and £10.85 for 18 to 20 year olds. If you are paid at or near the minimum, your bank holiday premium is bigger in cash terms this year than last, and the percentage deductions on it are identical.
What has not changed, and is worth repeating because it catches people every August: there is still no legal right to extra pay for working a bank holiday in the UK. Any premium you got today came from your contract, your staff handbook or a collective agreement, not from the law. If you got nothing extra, that is lawful too. You can check the current rates and thresholds on gov.uk if you want the source.
If you want to see exactly what today’s shift is worth after income tax, National Insurance, pension and student loan, the NetPay app works it out from your hourly rate and hours. Free to download.
See your real take-home pay in seconds
NetPay does this maths for every shift, invoice and payslip, automatically.
Download the app now
No. Overtime is taxed at exactly the same rates as the rest of your pay. There is no separate overtime tax rate in the UK. What makes it feel higher is that your personal allowance is already used up by your basic hours, so every pound of premium is taxed from the first penny at your marginal rate, usually 20% income tax plus 8% National Insurance.
For most shift workers in the 2026/27 tax year, 28% of the overtime goes in deductions, made up of 20% income tax and 8% employee National Insurance. That leaves you 72p in the pound. Add a student loan at 9% and it becomes 37%. If you earn over £50,270 a year, the mix changes to 40% tax and 2% National Insurance, so 42%.
Usually because you were comparing a gross premium against a net payslip. A £50 gross premium at time and a half lands as roughly £36 after income tax and National Insurance. If it looks smaller than that, check whether a pension contribution or student loan repayment also came out, and check your tax code is not on W1 or M1.
One extra shift almost never does, and even if a single month looks heavy, a cumulative tax code corrects it automatically across the year. The exception is a non-cumulative code like 1257L W1 or 1257L M1, which treats each pay period in isolation and can over-deduct on a big week. That money comes back, but you may wait for it.
Want to see your actual take-home pay?
NetPay UK works out your real net pay after tax, NI, pension and salary sacrifice, for hourly, shift and variable-income workers. Free to download.
Download the app now
A note on financial advice: NetPay UK calculates take-home pay based on official HMRC tax rules. This article reflects rules in force at the time of publication (31 August 2026). Tax rules change. For complex situations, consult a qualified UK accountant or visit gov.uk/income-tax.
