Is a Christmas bonus taxed the same as regular pay?

Yes if your employer uses the cumulative PAYE method, which is HMRC's default. The bonus is added to the year-to-date pay and tax is recalculated on the total. The effective marginal rate on the bonus is your marginal rate (20%, 40%, or 45%) plus employee National Insurance. If your employer uses the bonus tax code method (a separate payroll run with a one-off tax code), the bonus is calculated as if it were a single payment for one pay period, which can over-tax if the bonus pushes you temporarily into a higher band. Both methods are legal. The cumulative method is more accurate.

Will I be over-taxed on my bonus?

Depends on the method and your year-to-date position. Most basic-rate taxpayers are not over-taxed under the cumulative method. Higher-rate and additional-rate taxpayers can be over-taxed under the bonus tax code method if their year-to-date pay pushes them temporarily into a higher band, or if their income crosses £100,000 and triggers the personal allowance taper. The over-taxation shows up as a smaller take-home on the payslip, not as a tax bill from HMRC.

How long does HMRC take to correct over-taxation?

Automatic correction at year end is the default. Your employer reconciles the cumulative method at the end of the tax year and the over-taxation is added to your final pay. If you are not on the cumulative method, HMRC issues a P800 letter after the tax year is closed and refunds the over-taxation via bank transfer or cheque. Manual reclaim via self-assessment or HMRC letter takes 4-8 weeks once the year end is closed.

Is the bonus included in my Personal Savings Allowance calculation?

No. The bonus is PAYE income, not savings interest. The Personal Savings Allowance applies to interest earned on savings (current account interest, savings account interest, peer-to-peer lending interest, etc.), not to bonus payments. The PSA for 2026/27 is £1,000 for basic-rate taxpayers, £500 for higher-rate taxpayers, and £0 for additional-rate taxpayers.

What if my employer uses the bonus tax code method and I cannot get it changed mid-year?

The over-taxation will be corrected automatically at the end of the tax year. The bonus will not be lost. It will be refunded through the final pay (if the cumulative method is used at year end) or via a P800 letter from HMRC (if the bonus tax code method is used all year). If the over-taxation is significant (more than £300 on a £3,000 bonus), you can submit a self-assessment return for the year and reclaim via the overpayment relief route. The self-assessment route is the cleanest if you already file, and it gives you certainty about the timing of the refund.

Educational use only. Not financial, investment, tax or legal advice.

17 November 2026 Syd Lawrence5 min read

Your December Bonus Tax Code 2026/27 Explained

Q: How do I know which method my employer uses?

Check your payslip. The cumulative method shows the year-to-date figures including the bonus in the regular tax calculation. The bonus tax code method shows the bonus in a separate 'taxable bonus' or 'one-off payment' line with its own tax code. If the payslip has a separate bonus line with a one-off tax code, the employer is using the bonus tax code method.

It is mid-November. The December bonus is on the payslip estimate. The take-home is lower than you expected. Here is why, and what to do about it.

Syd Lawrence

CEO & Co-founder at Delphina

Syd got fed up with being kept confused by the UK personal finance industry. So he built the tool he wished existed. Qualified to provide financial advice, prefers to provide financial clarity. No agenda. Just someone who finally got clear and wanted everyone else to be able to too.

You have just seen the December bonus estimate on the payslip portal. £3,000, give or take. The take-home is £2,160, give or take. That is roughly right for a basic-rate taxpayer on the cumulative PAYE method (20% income tax + 8% National Insurance = 28% effective on the bonus). If the take-home is £400 or £500 lower than that, the employer is using the bonus tax code method, and you have probably been over-taxed.

Two methods exist for paying a bonus through PAYE in 2026/27. The cumulative method, which is HMRC's default. And the bonus tax code method, which is faster for the payroll but less accurate. Both are legal. The cumulative method is the one that gets your take-home right. The bonus tax code method is the one that sometimes gets it wrong.

How bonuses are taxed in 2026/27

The two methods are HMRC-recognised and both are legal. The cumulative PAYE method is HMRC's default and is the most accurate. The bonus tax code method (sometimes called the "separate bonus run" or "non-cumulative method") is faster for the payroll but can over-tax in specific circumstances.

The cumulative method (HMRC default)

HMRC requires employers to add the bonus to the year-to-date pay and recalculate tax on the total. The effective marginal rate on the bonus is your marginal rate (20%, 40%, or 45%) plus employee National Insurance (8% for basic-rate, 2% above the upper earnings limit for higher and additional rate). For a basic-rate taxpayer on a £60,000 salary, the effective rate on a £3,000 bonus is 28%. Take-home: £2,160. For a higher-rate taxpayer: 42% effective. For an additional-rate taxpayer: 47% effective. The cumulative method treats the bonus as part of the year's pay, which is the right way to do it.

The bonus tax code method

Some employers use a separate tax code on the bonus, typically the regular 1257L with a week-1 or month-1 basis, or one of the older non-cumulative codes. The tax is calculated as if the bonus were a single payment for one pay period, not part of the year. This often over-taxes because the marginal rate applied is not always the same as the cumulative method. The bonus tax code method is faster for the payroll because it does not require the year-to-date recalculation. The cost is accuracy.

When the bonus tax code method over-taxes

Three common cases.

Case one: your year-to-date pay before the bonus is below the higher-rate threshold (£50,270 for 2026/27), and the bonus pushes you temporarily into the higher-rate band for that single payment. The cumulative method would have applied 20% on the bonus (because the year as a whole stays in the basic-rate band). The bonus tax code applied 40% on the bonus. The difference is real and recoverable.

Case two: your year-to-date pay is already in the higher-rate band, and the bonus is taxed at 40% plus NI on the bonus tax code. The cumulative method applies the same 40% rate because you are already in the band. No over-taxation in this case.

Case three: your personal allowance is tapered (income over £100,000). The taper reduces the personal allowance by £1 for every £2 of income above £100,000, down to £0 at £125,140. The bonus tax code does not taper the personal allowance because it is calculated as a single payment. The cumulative method applies the taper correctly. If the bonus is large enough to push you over £100,000, the cumulative method will taper your personal allowance for the year, and the bonus will be taxed at the marginal rate on the tapered allowance. The bonus tax code method misses this and over-taxes.

How to tell if you have been over-taxed

Compare your payslip take-home on the bonus to the cumulative method calculation. For a £3,000 bonus on a £60,000 basic-rate salary, the cumulative method take-home is around £2,160. If your payslip shows £1,800 or £1,900 take-home, you have probably been over-taxed by £200-£400. The over-taxation shows up as a smaller take-home, not as a tax bill from HMRC.

You can also check which method your employer is using by looking at the payslip. The cumulative method shows the year-to-date figures including the bonus in the regular tax calculation. The bonus tax code method shows the bonus in a separate "taxable bonus" or "one-off payment" line with its own tax code. If the payslip has a separate bonus line, the employer is using the bonus tax code method.

The three ways to reclaim

Way one: wait until the end of the tax year and the over-taxation is automatically corrected in your final pay. HMRC and most payroll software reconcile at year end, and the over-taxation is added to your final pay or refunded via a P800 letter. Way two: submit a self-assessment return for the tax year and reclaim the over-taxation via the overpayment relief route. The self-assessment route is the cleanest if you already file. Way three: write to HMRC and ask for the bonus to be re-coded to the cumulative method mid-year. HMRC can issue a revised tax code to your employer for the remaining payroll runs.

What to do if you suspect over-taxation

First, check the payslip to confirm which method your employer is using. Second, do the maths: cumulative method take-home vs payslip take-home. If the difference is more than £200 on a £3,000 bonus, you have probably been over-taxed. Third, choose your reclaim route. The simplest is to wait for the year-end automatic correction. The cleanest is self-assessment if you already file. The fastest mid-year is to ask HMRC for a revised tax code.

The one specific monthly action

Before the end of November 2026, check your December bonus estimate on the payslip portal. If the take-home is lower than the cumulative method predicts, ask your payroll team which method they are using. If it is the bonus tax code method and your year-to-date pay is below the higher-rate threshold, you will probably be over-taxed and the over-taxation will be corrected automatically at year end. If the over-taxation is significant (more than £300 on a £3,000 bonus), submit a self-assessment or write to HMRC mid-year rather than waiting for the year-end correction.

Sources. HM Revenue and Customs, Employment Income Manual EIM14000-EIM14050 (cumulative method and bonus tax code method). HM Revenue and Customs, PAYE for employers: bonuses and other lump sums. HM Revenue and Customs, Income Tax rates and Personal Allowances 2026/27. UK government, gov.uk/bonuses-and-redundancy-payments. Figures cited at 17 November 2026 prices. Bonus tax code treatment can be verified at HMRC EIM14050 and the gov.uk PAYE page.

For the bonus decision shape (cash, pension, or ISA), see year-end bonus: what to do with it. For the pay-rise-and-pension decision, see pay rise and your pension: what to do before the year-end. For the year-end money review (the three numbers on one page of A4), see year-end money review: three numbers.

Two Methods. One Reclaim.

The bonus tax code method can over-tax by £200-£400 on a £3,000 bonus. The reclaim is automatic at year end, faster if you file self-assessment.

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