When you contribute to a pension in the UK, the government tops up your contribution with tax relief. The idea is that pension savings are made from pre-tax income — so instead of paying tax on that money now and then saving what's left, you save the gross amount and tax is only paid (at a lower rate, in retirement) when you eventually withdraw.
In practical terms, pension tax relief means every £100 you put in your pension actually costs you less than £100. How much less depends on your income tax rate.
The amount of tax relief you receive matches your highest marginal income tax rate. Here's what that means in pounds and pence for 2026/27:
| Tax Band | Tax Rate | You Pay | HMRC Adds | Total in Pension |
|---|---|---|---|---|
| Basic rate | 20% | £80 | £20 | £100 |
| Higher rate | 40% | £60 | £40 | £100 |
| Additional rate | 45% | £55 | £45 | £100 |
| Non-taxpayer | 0% | £80 | £20 | £100 |
Important: non-taxpayers and basic rate taxpayers receive the same gross-up. Even if you pay no income tax, HMRC still adds 20% to your contributions up to £3,600 per year (gross). This makes pensions valuable even for lower earners.
Scottish taxpayers note: Scotland has its own income tax rates. Scottish basic rate is 20% on £14,877–£31,092, intermediate rate 21% on £31,093–£43,662, higher rate 42% on £43,663–£75,000, and advanced rate 45% on £75,001–£125,140. Pension relief is still given at the UK basic rate via relief at source — Scottish higher rate taxpayers must claim the additional relief through self-assessment.
There are two ways pension tax relief is administered in the UK, and many people don't realise which one they're on — which matters if you're a higher-rate taxpayer.
With relief at source (used by most personal pensions, SIPPs and many workplace schemes), you pay in from your take-home pay and your pension provider claims the basic rate relief directly from HMRC on your behalf. A £100 pension contribution means you pay £80 and the provider adds £20 automatically. Higher-rate taxpayers then claim the additional 20% via self-assessment.
With a net pay arrangement (common in employer workplace schemes), your pension contributions are deducted from your gross salary before income tax is calculated. This means relief is automatic — you simply never pay tax on that portion of your salary. You don't need to claim anything extra. The drawback: non-taxpayers and very low earners get no benefit since there's no tax to rebate.
Salary sacrifice is where you formally agree to reduce your salary in exchange for your employer increasing their pension contribution by the same amount. This isn't just a paperwork exercise — it has real tax consequences.
Because your official salary is lower, you pay:
Your employer also pays less employer NI (13.8%), and many employers pass some or all of this saving back into your pension — making salary sacrifice the most tax-efficient contribution method available to employed workers.
Via personal contribution (basic rate taxpayer): You contribute £4,000 after tax. HMRC adds £1,000 basic rate relief. Total in pension: £5,000. Your NI bill is unchanged.
Via salary sacrifice: Your salary reduces by £5,000. You pay no income tax or NI on that £5,000. Employer pays £5,000 into your pension. Net cost to you: approximately £3,400 (saving £600 in NI at 8% vs the personal contribution route).
Saving from salary sacrifice: ~£600 per year on £5,000 of contributions for a basic rate taxpayer.
Use the salary sacrifice pension guide for full worked examples at different salary levels.
See how much your pension could grow with tax relief factored in — at any contribution rate and retirement age.
Use the Pension Calculator →You can't contribute unlimited amounts to a pension and receive tax relief. HMRC caps it through the annual allowance.
| Allowance | 2026/27 Limit | Who It Applies To |
|---|---|---|
| Standard annual allowance | £60,000 | Most workers |
| Money purchase annual allowance (MPAA) | £10,000 | Anyone who has flexibly accessed a pension pot |
| Tapered annual allowance | £10,000–£60,000 | Those with adjusted income above £260,000 |
The annual allowance covers all contributions to your pension(s) — both your contributions and your employer's. If you have unused allowance from the previous three tax years and were a scheme member in those years, you can carry forward the unused amount and make a larger one-off contribution in the current year.
Important: If you've flexibly accessed a defined contribution pension (taken income from a drawdown pot or an annuity with certain features), your money purchase annual allowance drops to £10,000. This prevents recycling of pension withdrawals back into a pension for further tax relief.
If your pension uses relief at source and you're a higher-rate taxpayer, your provider only claims 20% basic rate relief automatically. You need to claim the additional 20% (or 25% for additional rate) yourself.
There are two ways:
Many higher-rate taxpayers leave thousands of pounds unclaimed every year simply by not registering for self-assessment. It is always worth checking. Use our income tax calculator to understand your rate and likely relief entitlement.
Emma contributes 5% of her salary (£1,750/year) into her personal pension via relief at source. She's a basic rate taxpayer.
She pays £1,400 into her pension. Her provider claims £350 from HMRC. Total in her pension: £1,750.
Net cost of a £1,750 pension contribution: £1,400. Effective return from relief alone: 25% on her contribution.
Her employer also contributes 3% (£1,050), making her total annual pension contribution £2,800.
James contributes £10,000 per year into a SIPP. His pension provider claims £2,000 basic rate relief from HMRC. But James can also claim higher rate relief via self-assessment.
Additional relief: £10,000 × 20% = £2,000 refund on his tax return.
Net cost of a £10,000 SIPP contribution: £6,000 (£8,000 paid in, £2,000 returned via tax return).
Total in pension: £10,000 + £2,000 basic rate relief = £12,500 (if SIPP provider grosses up).
Rachel agrees to salary sacrifice £5,000 per year. Her official salary becomes £45,000.
Income tax saving: £5,000 × 20% = £1,000.
NI saving: £5,000 × 8% = £400.
Total saving: £1,400. Net cost of a £5,000 pension contribution via salary sacrifice: £3,600.
Her employer also saves £5,000 × 13.8% = £690 in employer NI — if the company passes this back, it's another £690 in the pension pot at no cost to Rachel.
Enter your salary and pension contribution to see exactly how much you take home and how much goes into your pot.
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