If you pay tax at 40% or 45% and contribute to a SIPP, you have to claim the extra tax relief yourself: your provider only ever adds the basic 20%, and the remaining 20% or 25% comes to you through your Self Assessment tax return or, if you don’t file one, through HMRC’s online claim service. This guide walks through how to claim SIPP tax relief for both routes, what figures to use, and when the claim isn’t needed at all.
Why the Claim Isn’t Automatic
SIPPs run on what HMRC calls Relief at Source. For every £80 you pay in, your provider claims £20 from HMRC and adds it to your pot, making the gross contribution £100. That happens regardless of your tax bracket, and even if you pay no tax at all.1GOV.UK. Reclaim Tax Relief for Pension Scheme Members With Relief at Source
The provider stops at 20%. If your marginal rate is higher, the rest is yours to claim, but HMRC won’t send it unprompted.2GOV.UK. Tax on Your Private Pension Contributions – Tax Relief
Working Out What You’re Owed
Every calculation starts with the gross contribution, not the net amount that left your bank account. Pay in £8,000 and your provider adds £2,000 of basic-rate relief, so the gross figure is £10,000. That £10,000 is what you use.
A 40% taxpayer is entitled to 40% relief in total. The provider has already secured 20%, so you claim the other 20%. On a £10,000 gross contribution, that’s £2,000. A 45% taxpayer claims the remaining 25%, or £2,500 on the same contribution.2GOV.UK. Tax on Your Private Pension Contributions – Tax Relief
The additional relief doesn’t get added to your pension pot. HMRC either reduces your tax bill, adjusts your PAYE code so you pay less each month, or sends a refund.
Claiming Through Self Assessment
If you already file a Self Assessment return, you must claim through it rather than using the separate online tool.3GOV.UK. Claim Tax Relief on Your Private Pension Payments The entry goes in Box 1, labelled “Payments to registered pension schemes operating relief at source.” Enter the gross contribution: what you paid plus the basic-rate relief your provider claimed. HMRC’s system works out the additional relief and either cuts your tax liability or produces a refund.4GOV.UK. How to Fill In Your Tax Return (2022)
The mistake to avoid is entering the net figure. Pay £8,000 and the correct entry is £10,000. Your SIPP provider’s annual statement will show both amounts, so use it as your reference.
If you already submitted a return and forgot to include your contributions, you can amend it. The standard window is within 12 months of the filing deadline for that tax year.
Claiming Without Self Assessment
Plenty of higher-rate taxpayers don’t file Self Assessment. If your higher-rate income comes entirely from one PAYE employment, you probably don’t need to. In that case, HMRC has a dedicated online service for claiming pension tax relief directly.
To use it, you’ll need:3GOV.UK. Claim Tax Relief on Your Private Pension Payments
- Your National Insurance number
- The type of pension and the provider’s name
- The net amount of contributions for each tax year you’re claiming
- Proof of contributions: a letter or statement from your provider showing your name, the contributions paid, and the tax year they relate to
You upload the proof when submitting the claim. HMRC reviews it and contacts you within 28 working days. For a claim relating to the current tax year, HMRC typically adjusts your tax code so you pay less through PAYE for the rest of the year. For earlier tax years, you’ll get a refund.
You can write to HMRC if you can’t use the online service, though online is quicker and lets you track progress.3GOV.UK. Claim Tax Relief on Your Private Pension Payments
Scottish Taxpayers
Scotland sets its own income tax rates, so the amount you’re owed depends on your Scottish band even though your provider still claims 20% under Relief at Source.2GOV.UK. Tax on Your Private Pension Contributions – Tax Relief
- 19% starter rate: your provider claims 20%, which is slightly more than your rate. You don’t repay the difference.
- 21% intermediate rate: claim an extra 1%
- 42% higher rate: claim an extra 22%
- 45% advanced rate: claim an extra 25%
- 48% top rate: claim an extra 28%
The claiming route is the same as elsewhere in the UK, whether through Self Assessment or the online service. Only the amount changes.
When You Don’t Need to Claim: Salary Sacrifice
If your workplace pension contributions run through salary sacrifice, the mechanics are different and there’s nothing to reclaim. You’ve agreed to a lower salary and your employer pays the difference into your pension, so the contribution never appears in your taxable pay. You already got the full tax benefit at source, along with a National Insurance saving. This mainly matters for workplace pensions rather than SIPPs, but the point is worth knowing: money that was never taxed doesn’t generate a further relief claim. Check your payslip or ask your employer which method applies before assuming a claim is due.
Limits on the Relief You Can Claim
Tax relief on your personal contributions is capped at 100% of your UK taxable earnings, or £3,600 gross, whichever is higher.5GOV.UK. Pension Schemes Rates Earnings here means income from employment or self-employment: salary, wages, bonuses, commissions, trading profits. Dividends, rental income, and pension income don’t count. Someone whose only income is dividends can still pay in up to £3,600 gross (£2,880 net) and get basic-rate relief added by the provider, but there’s no higher-rate relief to claim because there’s no higher-rate tax being paid on that income.
Alongside the earnings cap, the annual allowance sets a ceiling across all your pensions combined. For the 2026/27 tax year it’s £60,000, covering your personal contributions (grossed up), employer contributions, and any increase in the value of defined benefit pensions.6GOV.UK. Tax on Your Private Pension Contributions – Annual Allowance
If you’ve flexibly accessed a defined contribution pension already, for instance by taking cash from a drawdown fund or an uncrystallised funds pension lump sum, the money purchase annual allowance replaces the standard figure for your defined contribution savings. It’s £10,000, and unused MPAA can’t be carried forward.6GOV.UK. Tax on Your Private Pension Contributions – Annual Allowance
Keep your SIPP provider’s annual contribution statement. It shows both the net and gross figures, which is what you need whichever route you use to claim.