Pension Tax Relief Calculator 2026/27: See What HMRC Adds to Your Contributions

Work out your relief above

Enter what you pay in and your income, and the tool above estimates the basic-rate relief added at source plus any higher or additional-rate relief you can reclaim. Read on for the formula, worked examples for a basic and higher-rate taxpayer, the 2026/27 rates, and the mistakes that cost people the most.

How pension tax relief works

Pension tax relief is the government's way of refunding the income tax you already paid on money you choose to save for retirement. The principle is simple: pension contributions should come out of untaxed income. Because most people pay in from their net (post-tax) pay, HMRC tops the pot back up to the gross amount.

There are two delivery methods, and which one you have changes how the relief reaches you:

• Relief at source - used by most personal pensions, SIPPs and workplace group personal pensions. You pay in from taxed income, and the provider claims 20% basic-rate relief from HMRC and adds it to your pot automatically. A higher or additional-rate taxpayer then claims the extra relief separately.
• Net pay arrangement - common in occupational schemes. Your contribution is taken from your gross salary before income tax is worked out, so you get full relief at your marginal rate immediately and there is nothing extra to claim.

The plain-English formula for relief at source is:

Gross contribution = Net contribution ÷ 0.80

Basic-rate relief added = Gross contribution − Net contribution

So for every £80 you pay in, the provider reclaims £20 and £100 lands in the pension. If you are a higher-rate taxpayer, you can claim a further 20% of the gross figure; an additional-rate taxpayer can claim a further 25%. That extra slice does not go into the pension automatically - it comes back to you through your tax return or tax code, which is the single most overlooked part of the system.

The key idea behind higher-rate pension tax relief is that the contribution extends your basic-rate band. A £10,000 gross contribution pushes the point at which you start paying 40% tax up by £10,000, so more of your income is taxed at 20% instead of 40%. That mechanical effect is why the relief is worth your top rate of tax, not a flat 20%.

Relief at your marginal rate: 20%, 40% and 45%

How much you get back depends on the highest rate of income tax you pay in England, Wales or Northern Ireland for 2026/27:

• Basic-rate (20%) taxpayer: 20% relief, all delivered at source. An £80 net payment becomes £100.
• Higher-rate (40%) taxpayer: 20% at source plus 20% you reclaim - 40% relief overall. A £6,000 net payment can become £10,000 in the pot, with £2,000 of that reclaimed.
• Additional-rate (45%) taxpayer: 20% at source plus 25% you reclaim - 45% relief overall.

Scotland is different, and this calculator flags it. Scottish taxpayers have their own income tax bands (starter 19%, basic 20%, intermediate 21%, higher 42%, advanced 45% and top 48% for 2026/27), so the relief you can claim follows your Scottish marginal rate. A Scottish intermediate-rate taxpayer, for example, can claim 1% extra above the 20% given at source. The Personal Allowance of £12,570 is UK-wide, but the rates that drive your relief are not. If you pay Scottish income tax, use our Scotland tax calculator alongside this one to confirm which band your contribution actually reduces.

Claiming higher-rate pension tax relief

This is where real money gets left behind. The basic 20% is automatic on relief-at-source pensions, but the higher or additional-rate slice is not - you have to ask for it. There are three routes:

• Self Assessment: if you file an SA100 return, enter your gross personal pension contributions in the pensions section. HMRC widens your basic-rate band and refunds the difference, usually as a reduction to your bill or a repayment.
• Write to HMRC: if you do not file a return, you can claim by phone or letter. HMRC may adjust your tax code so you get the relief through your pay going forward.
• Backdating: you can claim for up to the previous four tax years if you have missed it. People who quietly moved into the higher-rate band after a pay rise are the most common to have under-claimed.

Workplace schemes run on a net pay arrangement give full relief automatically, so there is nothing to reclaim - but salary sacrifice works differently again, and it is worth understanding which one you are in before you assume relief is missing.

The £60,000 annual allowance

Relief is generous but not unlimited. The annual allowance caps the total going into your pensions each year that can attract relief, and it is tapered for very high earners. You also cannot get relief on personal contributions above 100% of your UK relevant earnings in the year. The mechanics of the cap, carry-forward of unused allowance and the taper for high earners are detailed enough to deserve their own tool - work the limit out with our pension annual allowance calculator before you make a large one-off payment. This page keeps to the relief maths; the allowance page owns the contribution-limit question.

How the calculator works

The tool takes your contribution and income and applies the relief-at-source method by default. It grosses up your net payment by dividing by 0.80, shows the basic-rate relief the provider reclaims, then checks your income against the 2026/27 thresholds to estimate any higher or additional-rate relief you can claim back. If you tell it you are in a salary sacrifice or net pay scheme, the relief is already in your figures, so it shows the marginal-rate saving rather than a separate reclaim. Treat the output as a guide - your tax code, other income and pension scheme rules can all shift the exact number.

Worked example: a basic and a higher-rate taxpayer

Take Priya, a teaching assistant earning £28,000, who pays £160 a month into a personal pension. That is a net contribution of £1,920 over the year.

• Gross contribution = £1,920 ÷ 0.80 = £2,400
• Basic-rate relief added at source = £2,400 − £1,920 = £480

Priya is a basic-rate taxpayer, so 20% is the full relief. Her £1,920 becomes £2,400 in the pot, and there is nothing extra to claim.

Now take James, a project manager earning £60,000, who pays £8,000 net into his SIPP across the year.

• Gross contribution = £8,000 ÷ 0.80 = £10,000
• Basic-rate relief added at source = £10,000 − £8,000 = £2,000 (now in the pot)
• His £10,000 contribution extends his basic-rate band, so an extra 20% of £10,000 = £2,000 comes back to him via Self Assessment

James gets £4,000 of relief in total - 40% of the gross. The £10,000 in his pension has cost him just £6,000 net once the reclaim arrives. If he never files for the higher-rate portion, he loses that £2,000 every year it goes unclaimed.

One more, framed around the £100,000 trap. Daniel earns £104,000 and is losing Personal Allowance to the taper (£1 of allowance for every £2 of income over £100,000). A £4,000 gross pension contribution cuts his adjusted income to £100,000, restoring £2,000 of Personal Allowance. Combined with the 40% relief on the contribution itself, the effective relief on that band of income can reach roughly 60%. That is the highest-value relief in the system, and it is why a well-timed contribution near £100,000 is worth checking carefully.

2026/27 rates and thresholds (England, Wales and Northern Ireland)

Figures are checked for the 2026/27 tax year. Scotland sets its own income tax rates and bands, so Scottish taxpayers claim relief at their Scottish marginal rate. Confirm the official position at gov.uk pension tax relief and the plain-English guidance from MoneyHelper.

Salary sacrifice versus relief at source

These two routes can produce a similar pension pot but feel completely different on your payslip. With relief at source you pay in from net pay and the relief is added or reclaimed afterwards. With salary sacrifice you give up part of your gross salary in exchange for an employer pension contribution, so you never pay income tax or National Insurance on that slice - and your employer saves NI too, which they may add to your pot.

The National Insurance saving is the part relief at source cannot match. For a higher-rate employee paying 2% NI above the upper earnings limit the gap is smaller, but for a basic-rate employee paying 8% NI the saving is meaningful. Because the mechanism, payslip effect and NI maths differ, we keep that comparison on the dedicated salary sacrifice calculator. If your pension sits inside a self-invested wrapper, our SIPP calculator helps you project the pot the relief is feeding, and the broader pension calculator brings contributions and growth together for retirement planning.

Common mistakes and what to watch

• Forgetting to claim higher-rate relief. The 20% top-up is automatic; the rest is not. If you are a 40% or 45% taxpayer on a relief-at-source pension and you do not file Self Assessment, the extra relief sits unclaimed unless you contact HMRC. You can backdate up to four years.
• Confusing net pay and salary sacrifice with relief at source. If your scheme already takes contributions before tax, claiming again would be double-dipping. Check your scheme type before you enter anything on a tax return.
• Paying in more than your earnings. Personal contributions only attract relief up to 100% of your UK relevant earnings (or £3,600 gross if you have little or no earnings). Pay in more and the excess gets no relief.
• Ignoring the annual allowance. A large one-off contribution can breach the £60,000 allowance and trigger a charge that claws relief back. Check the limit first.
• Assuming Scotland works like England. Scottish marginal rates run up to 48%, so the relief a Scottish taxpayer can claim differs from the rUK figures above. Use your Scottish band, not the English one.
• Overlooking the £100,000 sweet spot. If your income sits just over £100,000, a contribution that brings it back to £100,000 restores Personal Allowance and can deliver an effective relief rate well above 40%.

These figures are estimates for guidance only and not personal tax or financial advice. Your scheme rules, tax code and other income can change the result - check with HMRC or a qualified adviser before acting on a large contribution.

Related calculators

Once you know your relief, plan the wider picture with our pension calculator for retirement projections, confirm your contribution headroom with the pension annual allowance calculator, and compare delivery methods using the salary sacrifice calculator or model a self-invested pot with the SIPP calculator.

You might also need

• check what tax you are owed, higher-rate pension relief is often unclaimed.

Related tools

• 60% tax trap calculator, use pension contributions to escape the trap.