How Pension Tax Relief Works
HMRC pays part of your pension contributions for you. Here is how much, and how to claim every penny you are owed.
Pension contributions are made from pre-tax income. In practice, this means the government tops up every pound you contribute — and for higher earners, it tops up a lot. Understanding how this works is one of the most valuable things you can do for your finances.
The basic principle
When you contribute to a pension, you are putting in money that has not been taxed yet. The government effectively refunds the income tax you would otherwise have paid on those earnings. The rate of relief matches your marginal income tax rate.
| Tax band | Relief rate | Cost of £100 in pension | You save |
|---|---|---|---|
| Basic rate (20%) | 20% | £80 | £20 |
| Higher rate (40%) | 40% | £60 | £40 |
| Additional rate (45%) | 45% | £55 | £45 |
How relief is delivered
Relief at source (most personal pensions and SIPPs)
You pay your contribution from your take-home pay (net of tax). Your pension provider claims the 20% basic rate relief from HMRC and adds it to your pot automatically — usually within a few weeks. If you are a higher or additional rate taxpayer, you must then claim the extra relief yourself via Self Assessment.
Net pay arrangement (many workplace pensions)
Your employer deducts your pension contribution from your gross salary before income tax is calculated. You automatically get relief at your full marginal rate — no claiming required. Basic rate taxpayers get the same outcome, but higher-rate taxpayers get their full 40% automatically rather than having to claim via Self Assessment.
Salary sacrifice
You agree to reduce your gross salary in exchange for an equivalent employer pension contribution. This reduces your National Insurance contributions as well as income tax — often the most tax-efficient arrangement available.
Claiming higher-rate relief via Self Assessment
If your pension uses relief at source and you are a higher or additional rate taxpayer, you need to claim the extra relief each year. You do this through a Self Assessment tax return, or by writing to HMRC with your pension contribution details. HMRC will either send you a cheque or adjust your tax code.
Many higher-rate taxpayers never claim their extra pension relief and leave significant money on the table. If you contribute to a personal pension or SIPP, check whether you have been claiming your full entitlement — you can backdate claims up to four tax years.
The annual allowance
You can receive tax relief on contributions up to 100% of your earnings, subject to the annual allowance of £60,000 (2025/26). If you earn less than £60,000, your relief is capped at your earnings. Very high earners face a tapered annual allowance that reduces to £10,000 at adjusted income of £360,000.
You can "carry forward" unused annual allowance from the three previous tax years, allowing larger one-off contributions — useful if you receive a bonus or windfall.
This guide is for informational purposes only and does not constitute financial advice. Tax rules can change. Always check current HMRC guidance or consult a qualified financial adviser before making decisions.