Pension Tax Relief Calculator
Pension contributions receive government tax relief, effectively giving you free money. For every £80 a basic rate taxpayer contributes, the government adds £20. Higher rate taxpayers can claim even more.
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A common mistake is failing to claim higher-rate pension tax relief. If your pension uses Relief at Source, only basic rate relief is added automatically – additional relief depends on the income actually taxed in each band and may need to be claimed from HMRC; Scottish rates differ.
Understanding your pension tax relief entitlement helps you maximise the government boost. Enter your income and contribution amount below to see the true cost of your pension savings.
Pension Tax Relief Calculator
Calculate your pension tax relief and the real cost of contributions (2026/27)
Your total salary before tax
Enter net cash paid. Provider adds 20% of the gross contribution; any extra relief must be claimed from HMRC.
Your Pension Tax Relief
Starting marginal income tax: 20.0%. Relief below is calculated across all affected bands.
Total Going Into Your Pension
£6,250.00
From a £5,000.00 contribution
Your Net Cost After Relief
£5,000.00
Tax relief and employee NI save 20.0% of the gross pension contribution
Calculation rules checked 1 October 2026 against HMRC pension guidance. Salary-only annual estimate for 2026/27. Registered pension and relief eligibility are assumed. Other income, existing contributions, employer contributions, tapered annual allowance, the money purchase annual allowance and any tax charge are excluded. Low earners must qualify for UK pension relief; net-pay HMRC top-up payments are not included. Salary sacrifice must preserve National Minimum Wage.
Tax Relief at Different Contribution Levels
Each scenario recalculates tax across all bands. Amounts below are net cash paid.
£3,000.00 contribution
+£750.00
income tax relief
Into pension: £3,750.00
Net cost: £3,000.00
£5,000.00 contribution
+£1,250.00
income tax relief
Into pension: £6,250.00
Net cost: £5,000.00
£10,000.00 contribution
+£2,500.00
income tax relief
Into pension: £12,500.00
Net cost: £10,000.00
£20,000.00 contribution
+£5,000.00
income tax relief
Into pension: £25,000.00
Net cost: £20,000.00
Relief at Source vs Net Pay
How the two schemes compare for your contribution
Relief at Source
- • You pay from after-tax income
- • Provider claims 20% basic rate automatically
- • Higher/additional rate: claim via Self Assessment
- • Common for SIPPs and personal pensions
- • Low earners get relief even below tax threshold
Net Pay Arrangement
- • Contribution taken before tax
- • Full tax relief automatic – nothing to claim
- • Reduces your taxable income immediately
- • Common for workplace pension schemes
- • Low earners may receive a separate HMRC top-up; it is excluded from this estimate
What this means for your contributions
Every £80 you put in as a basic-rate taxpayer becomes £100 inside your pension automatically. If you're a higher-rate (40%) or additional-rate (45%) taxpayer, you get the basic 20% added at source — but the extra 20–25% only lands if you actively claim it through Self Assessment or by writing to HMRC. Many higher earners miss out for years.
If your contributions go through salary sacrifice, you also save 8%/2% employee NI and your employer saves 15% — often making salary sacrifice noticeably better than personal contributions for the same gross amount. Watch the £60,000 annual allowance and the separate threshold-income and adjusted-income tests for tapered annual allowance.
How Pension Tax Relief Works
Pension tax relief is essentially the government giving you back the tax you paid on money you put into a pension. It's one of the most valuable tax benefits available in the UK.
The examples below assume relief at source and that the whole contribution qualifies at the stated rUK rate. Scottish rates differ. A contribution crossing bands must be calculated in slices, as in the tool above.
Basic Rate (20%)
Contribute £80 → £100 goes in
The government adds £20
Net cost: 80p per £1 saved
Higher Rate (40%)
Contribute £80 → £100 goes in
Claim back extra £20 via SA
Net cost: 60p per £1 saved
Additional Rate (45%)
Contribute £80 → £100 goes in
Claim back extra £25 via SA
Net cost: 55p per £1 saved
Why Does This Exist?
The government wants you to save for retirement so you're less reliant on the state pension. Tax relief makes pensions more attractive than other savings. The trade-off? Your money is locked away until at least age 55 (rising to 57 in 2028).
Relief at Source vs Net Pay: What's the Difference?
| Aspect | Relief at Source | Net Pay Arrangement |
|---|---|---|
| How it works | Contribution from net pay; provider claims 20% | Contribution before tax calculated |
| Basic rate relief | Added automatically by pension provider | Automatic (reduces taxable income) |
| Higher rate relief | Must claim via Self Assessment | Automatic – nothing to claim |
| Low earners (<£12,570) | ✓ Still get 20% relief | No payroll tax saving; a separate HMRC top-up may apply |
| Common with | SIPPs, personal pensions | Workplace pensions (most) |
The "Net Pay Anomaly"
If you earn below £12,570 and your workplace uses Net Pay, you get no tax relief because you're not paying tax. But with Relief at Source, you'd get 20% added anyway. From April 2024, the government introduced a fix – low earners in Net Pay schemes can now claim the equivalent relief.
Why Pension Contributions Reduce Your Tax Bill
Pension contributions can reduce your effective tax bill in several ways beyond the basic relief:
Avoid the 60% Tax Trap
Earn between £100,000 and £125,140? You lose £1 of Personal Allowance for every £2 earned, creating a 60% marginal income tax rate in England, Wales and Northern Ireland, or 67.5% in Scotland. Pension contributions reduce your "adjusted net income" – contribute enough to stay below £100k and restore your full allowance.
Child Benefit Clawback
Earning over £60,000? You start losing Child Benefit to the High Income Child Benefit Charge. Pension contributions can bring your adjusted income below £60k, keeping your full benefit.
Tax-Free Growth
Once in your pension, investments grow free of income tax and capital gains tax. Combined with initial relief, this makes pensions extremely tax-efficient for long-term saving.
Student Loan & Salary Sacrifice
If you salary sacrifice into a pension, your gross salary reduces. This can lower student loan repayments (calculated on gross pay above threshold) and National Insurance contributions – double benefit.
Try the Salary Sacrifice Calculator →Annual Allowance & Limits
Annual Allowance: £60,000
Maximum gross contributions (including employer) that receive tax relief per year. Excess contributions face a tax charge at your marginal rate.
Carry Forward
Unused allowance from the previous 3 tax years can be carried forward, allowing much larger contributions if you have the means.
Tapered Annual Allowance
If threshold income exceeds £200,000 and adjusted income exceeds £260,000, the standard allowance tapers by £1 for every £2 over the threshold, to a minimum of £10,000.
Lifetime Allowance
Abolished from April 2024. Previously capped total pension savings at £1,073,100 with tax charges above. No longer applies.
Frequently Asked Questions
Related Calculators
Salary Sacrifice Calculator
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Bonus Tax Calculator
Consider sacrificing your bonus into pension for maximum tax efficiency.
Student Loan Calculator
Salary sacrifice pensions can reduce student loan repayments too.
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