Relief at Source: Pension Top-Ups and Claims

UK pensions get tax relief through one of three mechanisms, and the one your scheme uses changes both your take-home pay and how much you need to do at tax-return time.

Relief at source (RAS): Common in personal pensions, SIPPs, and many group personal pensions. You contribute from net pay. The provider claims 20% basic-rate relief from HMRC and adds it to your pot. Higher-rate and additional-rate taxpayers must claim the extra relief themselves.

Net pay arrangement: Common in occupational schemes (especially defined-benefit schemes and trust-based defined-contribution schemes). Your contribution is deducted from gross pay before income tax is calculated. Tax relief is automatic at your marginal rate, with no claim needed.

Salary sacrifice: Your employment contract reduces your headline salary in exchange for higher employer pension contributions. This avoids both income tax and National Insurance on the sacrificed amount, which can add an NI saving subject to eligibility and scheme terms. Not all employers offer it.

The choice usually is not yours — your employer or pension provider sets the method. Knowing which you are on is essential to understanding what you are actually getting.

Take a basic-rate taxpayer earning £30,000 who contributes 5% of pay (£1,500 a year) to a workplace pension on relief at source.

• You pay £1,200 from net pay (80% of £1,500).
• The pension provider claims £300 (20% of £1,500) directly from HMRC.
• Your pot grows by the full £1,500 — but you have only paid £1,200.

For a basic-rate taxpayer, this is the end of the story. The relief is automatic and matches your marginal rate.

For higher- and additional-rate taxpayers, the basic 20% top-up is automatic, but the extra relief you are entitled to is not. Check whether that extra relief is included in your tax return or code.

Both descriptions can refer to the same relief-at-source payment. You pay £80 and the provider adds £20, making £100 gross. The £20 relief is 20% of the £100 gross contribution, but 25% of your £80 payment. Do not add 20% to the net payment: £80 × 1.2 would give the wrong £96 total.

Check your pension statement for the payment and provider relief separately. Extra higher-rate relief reduces your tax; it does not automatically appear as another provider top-up.

Assume an England/Wales/Northern Ireland taxpayer earning £80,000 in 2026/27 contributes £1,500 gross, with the whole amount eligible for 40% relief. The person pays £1,200, the provider adds £300, and a further £300 Income Tax reduction is available through HMRC. The pension receives £1,500; the extra relief reduces the person's tax rather than automatically increasing the pot.

At 45%, the extra relief on an amount wholly within that rate is 25% of the gross contribution. In Scotland, extra relief can be 1%, 22%, 25% or 28% where the relevant income was taxed at 21%, 42%, 45% or 48%. A Scottish 19% taxpayer does not repay the provider's 20% relief.

If a contribution crosses tax bands, split the relief accordingly. These are simple rate examples; allowance restoration and contribution limits can affect the wider outcome.

If you complete Self Assessment: normally claim through the pension section of your return using the gross relief-at-source contribution (your payment plus provider relief). Do not include salary sacrifice or net-pay contributions as relief-at-source payments.

If you do not complete Self Assessment: use HMRC's online pension-relief service, or its postal route if you cannot claim online. Follow the service's requested net/gross figures and supply proof of payments and relief. A Self Assessment filer can use that service for a current-year tax-code adjustment, but must still report the correct contribution on the return.

Earlier years: ordinary claims generally have a four-year limit from the end of the relevant tax year. On 30 September 2026, 2022/23 is still within that limit, ending 5 April 2027. Return amendment and overpayment-relief routes have their own requirements; use HMRC's instructions rather than submitting an unnecessary late return.

Keep the pension statement and HMRC acknowledgement. Processing time is not a promised refund date; check the service's current response guidance.

The employer or provider normally determines the method available. For a basic-rate employee paying tax on the whole contribution, relief at source and net pay can have the same eventual Income Tax cost. With relief at source, extra higher-rate relief may need a claim.

Eligible non-earners under 75 can normally receive relief on up to £2,880 net (£3,600 gross) a year. Different earnings, residence and contribution limits apply in other circumstances.

Salary sacrifice can add an NI saving where the employer offers it, but check minimum wage, statutory pay, employer contributions and access to money. Compare equal gross funding using the pension-method guide.