Bonus Tax Calculator UK 2026/27
Calculate your exact bonus after tax, take-home pay, PAYE Income Tax, National Insurance, and pension sacrifice savings with our free bonus tax calculator for the 2026/27 tax year. Work out how much of your work bonus you keep in your pocket.
| Category | Base Salary | With Bonus | Bonus Impact |
|---|---|---|---|
| Gross Earnings | £45,000.00 | £50,000.00 | £5,000.00 |
| Income Tax (PAYE) | £6,486.00 | £8,486.00 | -£2,000.00 |
| National Insurance | £2,600.00 | £2,700.00 | -£100.00 |
| Pension Contribution | £2,250.00 | £2,250.00 | £0.00 |
| Net Take-Home | £33,664.00 | £36,564.00 | +£2,900.00 |
How Does the UK Bonus Tax Calculator Work?
Receiving a workplace performance bonus, annual Christmas bonus, or sales commission is an exciting milestone. However, when your payslip arrives, you might be shocked to discover how much of your bonus is deducted by HM Revenue & Customs (HMRC). Many workers wonder: “Why was half of my bonus taken in tax?”
Our bonus tax calculator solves this mystery. By comparing your regular salary with your combined earnings (base salary plus bonus), our bonus after tax calculator calculates the precise marginal tax rate applied to your bonus for the 2026/27 UK tax year (6 April 2026 to 5 April 2027). It accounts for PAYE Income Tax, Class 1 National Insurance, workplace pension deductions, student loan repayments, and the dreaded £100k Personal Allowance taper.
The Golden Rule of UK Bonus Tax: There is no separate or “special” bonus tax rate in the UK. HMRC simply treats your bonus as additional taxable employment income. Because your base salary has already consumed your £12,570 tax-free Personal Allowance, your entire bonus is taxed at your highest marginal rate (20%, 40%, 45%, or even 60%).
Why Is Tax on Bonus UK So High on Your Payslip?
When an employer processes a lump sum bonus in a specific month (for example, March or April), payroll software calculates tax using the HMRC Pay As You Earn (PAYE) cumulative system. There are three key reasons why your bonus feels disproportionately taxed:
1. No Personal Allowance Protection
Under a standard 1257L tax code, you receive £12,570 of tax-free income each year (£1,047.50 per month). Your base monthly salary already absorbs this allowance. Therefore, every single pound of your bonus sits directly on top of your existing earnings and is subject to immediate taxation.
2. Pushing You into a Higher Tax Bracket
If you earn £48,000 and receive a £5,000 bonus, your total annual income reaches £53,000. In England and Wales, the 40% Higher Rate tax threshold begins at £50,270. That means £2,270 of your bonus is taxed at 20%, but the remaining £2,730 crosses into the 40% tax bracket! In Scotland, the 42% Higher Rate threshold begins at £43,662, which triggers even sooner. You can verify your exact thresholds using our Income Tax Calculator.
3. The 60% Tax Trap on Earnings Between £100,000 and £125,140
The most punishing tax band in the UK is the “hidden” 60% tax trap. If your combined base salary and bonus exceed £100,000, HMRC reduces your Personal Allowance by £1 for every £2 of income above £100,000. By £125,140, your entire £12,570 allowance is completely wiped out.
This clawback effectively adds a 20% penalty on top of the 40% Higher Rate tax, resulting in an effective 60% Income Tax rate! Once you factor in 2% National Insurance and potential 9% student loan repayments, you can easily lose 62% to 71% of your bonus to HMRC. Test this with our Salary Calculator UK.
UK Bonus After Tax Benchmark Table (2026/27)
The table below demonstrates the actual net take-home pay and deduction rate on a £5,000 bonus across different base salary levels in England & Wales (assuming standard tax code 1257L, 5% pension, and no student loan):
| Base Salary | Gross Bonus | Income Tax on Bonus | NI on Bonus | Net Bonus Kept | Retention % |
|---|---|---|---|---|---|
| £30,000 | £5,000 | -£1,000 (20%) | -£400 (8%) | £3,600 | 72.0% |
| £40,000 | £5,000 | -£1,000 (20%) | -£400 (8%) | £3,600 | 72.0% |
| £48,000 | £5,000 | -£1,546 (Mixed) | -£236 (Mixed) | £3,218 | 64.4% |
| £60,000 | £5,000 | -£2,000 (40%) | -£100 (2%) | £2,900 | 58.0% |
| £80,000 | £5,000 | -£2,000 (40%) | -£100 (2%) | £2,900 | 58.0% |
| £105,000 | £5,000 | -£3,000 (60% Trap) | -£100 (2%) | £1,900 | 38.0% |
| £135,000 | £5,000 | -£2,250 (45%) | -£100 (2%) | £2,650 | 53.0% |
*Note: Calculations reflect 2026/27 HMRC rates in England, Wales and Northern Ireland. Employees with student loans will see an additional 9% (£450) deducted from their bonus.
How Does National Insurance Apply to Bonuses?
Unlike Income Tax—which is calculated cumulatively on an annual basis—Class 1 National Insurance (NI) is calculated on a per-pay-period basis.
For monthly-paid employees in 2026/27, the National Insurance thresholds are:
- Under £1,048/month (£12,570/year): 0% National Insurance.
- Between £1,048 and £4,189/month: 8% Class 1 employee National Insurance.
- Above £4,189/month (£50,270/year): Only 2% National Insurance.
This per-period calculation offers a significant advantage for lump sum bonuses! If your normal monthly salary already exceeds the £4,189 threshold (approximately £50,270/year), any lump sum bonus paid in that month is charged only 2% NI, rather than the 8% standard rate. Check our dedicated National Insurance Calculator to explore your NI bandings.
Bonus Sacrifice: How to Avoid 40% to 60% Tax on Your Bonus
If you are facing heavy deductions on your bonus, one of the most tax-efficient strategies available in the UK is Bonus Sacrifice (also known as bonus waiver).
Instead of taking your bonus as taxable cash, you instruct your employer to pay some or all of the bonus directly into your workplace pension scheme before payroll runs:
- 100% Tax Relief: The money goes straight into your pension gross, completely escaping 20%, 40%, or 60% Income Tax.
- National Insurance Exemption: Salary sacrificed pension contributions are exempt from employee Class 1 NI (saving 2% or 8%).
- Employer NI Sharing: Many generous employers also pass on their saved 13.8% employer National Insurance into your pension pot!
- Escaping the £100k Tax Trap: If your bonus pushes your adjusted net income above £100,000, sacrificing your bonus brings your taxable income back down, fully preserving your £12,570 Personal Allowance and avoiding the 60% tax clawback!
Our take home pay calculator bonus tool includes a dedicated Bonus Pension Sacrifice slider in the advanced settings so you can model the exact tax savings of sacrificing 25%, 50%, or 100% of your bonus.
Student Loan Deductions on Bonuses
If you have an outstanding UK student loan (Plan 1, Plan 2, Plan 4, Plan 5, or Postgraduate), the Student Loans Company (SLC) deducts repayments automatically via PAYE whenever your pay in that specific period exceeds the monthly threshold:
- Plan 1 (Threshold £26,065): 9% on income above £2,172/month.
- Plan 2 (Threshold £28,470): 9% on income above £2,372/month.
- Plan 4 Scottish (Threshold £32,745): 9% on income above £2,728/month.
- Plan 5 (Threshold £25,000): 9% on income above £2,083/month.
- Postgraduate Loan (Threshold £21,000): 6% on income above £1,750/month.
Because a bonus increases your total pay in that specific month, an extra 9% (or 6% for postgraduate loans) will be deducted from the bonus amount. When combined with 40% Higher Rate tax and 2% National Insurance, student loan borrowers retain only 49% of their gross bonus.
Related UK Take-Home Pay Calculators
Need to calculate your regular salary or compare different compensation packages? Explore our suite of free payroll calculators:
- Take Home Pay Calculator UK – The primary UK net salary and tax calculator.
- Salary Calculator UK – Full annual salary breakdown with tax and NI.
- Net Salary Calculator – Reverse calculate what gross salary you need to reach a target take-home pay.
- Monthly Take Home Pay Calculator – Model your exact monthly payslip.
- Weekly Take Home Pay Calculator – Ideal for weekly waged workers.
- Hourly Take Home Pay Calculator – Converts hourly rates into after-tax pay.
- Part-Time Take Home Pay Calculator – Calculate net income for part-time jobs and second jobs.
- Pro Rata Calculator – Calculate part-time salary from full-time equivalent job adverts.
- Daily Rate Calculator – Contractor and freelancer take-home pay calculator.
- PAYE Calculator – Complete breakdown of HMRC employer and employee deductions.
- Minimum Wage 2026 – Check legal UK hourly wage rates.
Frequently Asked Questions About Bonus Tax UK
Common questions regarding UK bonus taxation, PAYE adjustments, and take-home pay.
In the UK, bonuses are treated as ordinary employment earnings by HMRC. There is no separate or preferential bonus tax rate. Your bonus is added to your regular earnings and taxed at your top marginal PAYE tax rate (20% basic rate, 40% higher rate, or 45% additional rate in England and Wales), plus employee Class 1 National Insurance and applicable student loan deductions.
When a lump sum bonus is processed, the PAYE payroll software looks at your total earnings for that specific pay period. If the bonus pushes your monthly pay into a higher tax bracket, HMRC will apply higher rate tax (40%) to that chunk of income. Furthermore, bonuses sit on top of your existing base salary, meaning they do not benefit from your £12,570 tax-free personal allowance which was already used up by your regular monthly salary.
If your base salary plus bonus exceeds £100,000, HMRC reduces your £12,570 Personal Allowance by £1 for every £2 earned above £100,000. This taper creates an effective marginal Income Tax rate of 60% on income between £100,000 and £125,140. When you include 2% National Insurance and potential student loan repayments, you could lose over 62% to 71% of your bonus to deductions.
Bonus sacrifice (or bonus waiver) is an agreement where you surrender all or a portion of your cash bonus before it is paid, in exchange for your employer paying that exact sum directly into your workplace pension. Because pension contributions receive tax relief and bypass Class 1 National Insurance, you receive 100% of the bonus into your pension pot without losing 40% to 62% in tax.
Yes, bonuses are subject to Class 1 employee National Insurance. However, because National Insurance is calculated per pay period rather than cumulatively across the year, if your monthly earnings in your bonus month exceed the monthly Upper Earnings Limit (£4,189 in 2026/27), the excess bonus is taxed at only 2% National Insurance instead of the main 8% rate.
Yes. If your earnings in the pay period exceed your plan’s repayment threshold, student loans will be deducted from your bonus. Under Plan 1, Plan 2, Plan 4, and Plan 5, you repay 9% of income above the threshold. Under Postgraduate loans, 6% is deducted.