UK Pension Tax Relief Explained 2026/27: Rates, Limits and How to Claim

Last reviewed June 2026

Pensions / Tax

Pension tax relief is the single biggest reason pensions beat almost every other way of saving for retirement. It means your contributions are made from income before tax, so the government effectively tops up what you pay in at your highest rate of tax. Understanding how pension tax relief works, and how to claim all of it, is worth real money, especially for higher earners who often fail to claim the extra relief they are due. This guide explains the rules for 2026/27, the difference between relief at source and salary sacrifice, the allowances that cap relief, and the notorious 100,000 pound trap.

The mechanics differ depending on how you contribute, but the principle is the same: money goes into the pension without being taxed as income first, grows free of UK income and capital gains tax, and is only taxed when drawn, and then only on the part above the 25 percent tax-free element. Nothing here is personal advice.

How relief at source works

Most personal pensions and SIPPs use relief at source. You pay in from your taxed income, and the provider claims back basic-rate tax of 20 percent from HMRC and adds it to your pension. So a 80 pound contribution becomes 100 pounds in the pension automatically. This happens whatever your tax rate, which is why even a non-taxpayer can pay in up to 3,600 pounds gross a year and still receive the 20 percent top-up.

If you pay higher-rate or additional-rate tax, the 20 percent added at source is not the end of the story. You are entitled to a further 20 percent (higher rate) or 25 percent (additional rate) of relief, but you have to claim it through your self assessment tax return or by contacting HMRC. This extra relief usually arrives as a reduction in your tax bill or a change to your tax code, rather than as money added to the pension. A great deal of higher-rate relief goes unclaimed every year simply because people do not realise they must ask for it.

How net pay and salary sacrifice work

Workplace pensions often use a different method. Under net pay arrangements, your contribution is taken from your salary before income tax is calculated, so you get full relief at your marginal rate immediately, with nothing to claim back. Under salary sacrifice, you formally give up part of your salary in exchange for an equivalent employer pension contribution. Because the sacrificed amount is never paid as salary, you save National Insurance as well as income tax, and the employer saves employer National Insurance too, which some employers add to the pension.

Salary sacrifice is the most tax-efficient way to contribute, because of the National Insurance saving on top of income tax relief, but it is only available through an employer that offers it. It can also reduce other salary-linked figures, such as mortgage affordability assessments or certain benefits, so it is worth understanding the trade-offs. For the self-employed and anyone paying into a personal pension, relief at source is the route, and claiming higher-rate relief through self assessment is the key step not to miss.

The allowances that cap relief

Tax relief is generous but not unlimited. The annual allowance for 2026/27 is 60,000 pounds across all your pensions combined, and relief is also capped at 100 percent of your relevant UK earnings, whichever is lower. Contributions above the available allowance trigger an annual allowance charge that effectively claws back the relief. Carry forward can increase the limit by using unused allowance from the previous three tax years, provided you have the earnings to support it.

Two narrower limits catch specific groups. The tapered annual allowance reduces the 60,000 pound limit for high earners: it begins to bite where adjusted income exceeds 260,000 pounds and threshold income exceeds 200,000 pounds, falling by 1 pound for every 2 pounds of adjusted income above 260,000 pounds, down to a minimum of 10,000 pounds. The Money Purchase Annual Allowance reduces the limit to 10,000 pounds for anyone who has flexibly accessed a defined contribution pension. Both are easy to breach unintentionally, so high earners and those already drawing a pension should track their contributions carefully.

The 100,000 pound personal allowance trap

One of the most punishing features of the tax system creates an outsized opportunity for pension relief. Once income exceeds 100,000 pounds, the 12,570 pound personal allowance is withdrawn by 1 pound for every 2 pounds of income above 100,000 pounds, disappearing entirely at 125,140 pounds. Across that band, each extra pound of income is taxed at 40 percent and also costs 50 pence of lost allowance taxed at 40 percent, producing an effective marginal rate of around 60 percent.

Pension contributions are the most effective antidote. Because relief at source and salary sacrifice reduce your adjusted net income, a contribution that brings income back below 100,000 pounds can reclaim the personal allowance and attract relief at that effective 60 percent rate. For someone earning, say, 110,000 pounds, contributing the 10,000 pounds above 100,000 pounds into a pension can cost as little as around 4,000 pounds in net take-home terms once the reclaimed allowance and higher-rate relief are counted. Few other financial moves offer that level of immediate, guaranteed return, which is why the 100,000 pound trap is a prompt many higher earners use to boost pension saving.

How to claim the relief you are owed

Claiming relief correctly depends on the method. With salary sacrifice and net pay arrangements, full relief is given automatically through payroll, so there is nothing to claim. With relief at source, basic-rate relief is automatic, but higher and additional-rate taxpayers must claim the extra through self assessment, or by writing to or calling HMRC if they do not file a return. It is possible to claim back-dated relief for previous tax years, usually up to four years, so anyone who has missed higher-rate relief in recent years may be able to recover it.

Keeping a simple record of pension contributions for the year, including the gross amount after the 20 percent top-up, makes the self assessment entry straightforward. For those unsure, MoneyHelper explains the process, and an accountant or adviser can confirm the figures. The key point is that higher-rate relief is a right, not a bonus, but it has to be claimed.

Worked examples at each tax rate

The value of relief rises with your tax rate, which is clearest with worked examples of putting 100 pounds into a pension.

Basic-rate taxpayer

A basic-rate taxpayer pays in 80 pounds, and the provider adds 20 pounds of relief at source, giving 100 pounds in the pension. The net cost is 80 pounds for 100 pounds saved, a 25 percent uplift on the money paid in.

Higher-rate taxpayer

A higher-rate taxpayer also pays in 80 pounds with 20 pounds added at source, then claims a further 20 pounds through self assessment. The 100 pounds in the pension has cost only about 60 pounds in net terms once the claimed relief is counted. Failing to claim that extra 20 pounds, as many do, leaves the contribution costing 80 pounds instead of 60 pounds.

Additional-rate taxpayer

An additional-rate taxpayer pays in 80 pounds, gets 20 pounds at source, then claims a further 25 pounds, so the 100 pounds in the pension costs around 55 pounds net. And for income caught in the 100,000 to 125,140 pound band, the effective cost can fall to roughly 40 pounds for 100 pounds saved, because the contribution also reclaims the withdrawn personal allowance. The higher the rate, the more powerful the relief, which is why higher earners benefit most from maximising pension contributions within the allowances.

Third-party and spouse contributions

Relief is given on contributions made on someone's behalf as well as their own. A contribution paid for a non-earning spouse, a child or another person is treated as if the recipient paid it, so the recipient's basic-rate relief is added even though the money came from someone else. This is why a working spouse can pay up to 3,600 pounds gross a year into a non-earning partner's pension, with the 20 percent top-up applied, and why a junior SIPP for a child attracts relief on contributions up to the same 3,600 pound limit.

These contributions count towards the recipient's annual allowance and earnings limit, not the payer's, which can be a useful way to spread pension saving across a household and to use a lower earner's allowances. They do not give the payer any additional relief, but they move money into a tax-advantaged wrapper and, for the recipient, attract the basic-rate top-up regardless of whether the recipient pays tax.

Tax-free growth, tax-free cash and the 2027 change

Relief on the way in is only part of the advantage. Inside the pension, investments grow free of UK income tax and capital gains tax, which compounds over decades into a substantial benefit on its own. On the way out, you can normally take 25 percent tax free, capped by the lump sum allowance of 268,275 pounds, with the rest taxed as income at your marginal rate when drawn. For many people the marginal rate in retirement is lower than during their working life, adding a further tax advantage to the relief received on the way in.

One part of the picture is changing. From 6 April 2027 most unused pension funds and death benefits will be brought within the value of the estate for Inheritance Tax, with personal representatives responsible for reporting and paying any tax due. This does not affect the income tax relief on contributions or the tax-free growth, but it does change the estate-planning value of leaving a large pot untouched, and is a reason for those with substantial pensions to review how they draw and pass them on.

Frequently asked questions

How does pension tax relief work?

Contributions are made effectively from untaxed income. With relief at source, you pay 80 pounds and the provider adds 20 pounds of basic-rate relief, making 100 pounds in the pension; higher and additional-rate taxpayers claim a further 20 or 25 percent through self assessment. With salary sacrifice or net pay, full relief is given automatically through payroll.

How much can I get tax relief on?

Relief is given on contributions up to the annual allowance of 60,000 pounds for 2026/27, or 100 percent of your relevant UK earnings if lower. High earners may have a tapered allowance as low as 10,000 pounds, and anyone who has flexibly accessed a pension is limited to the 10,000 pound Money Purchase Annual Allowance. Carry forward can increase the limit using unused allowance from the previous three years.

What is salary sacrifice and is it worth it?

Salary sacrifice swaps part of your salary for an employer pension contribution. Because the sacrificed amount is never paid as salary, you save National Insurance as well as income tax, making it the most tax-efficient way to contribute. It is only available through an employer that offers it, and can affect salary-linked figures such as mortgage assessments, so weigh the trade-offs.

How do I claim higher-rate pension tax relief?

If you use relief at source and pay higher or additional-rate tax, claim the extra relief through your self assessment tax return, or by contacting HMRC if you do not file one. You can usually back-date claims up to four years, so missed relief from recent years may be recoverable. With salary sacrifice or net pay there is nothing to claim.

What is the 100,000 pound tax trap?

Above 100,000 pounds of income, the personal allowance is withdrawn by 1 pound for every 2 pounds of income, vanishing at 125,140 pounds, which creates an effective marginal rate of around 60 percent in that band. A pension contribution that reduces income back below 100,000 pounds reclaims the allowance and attracts relief at that effective rate, which is unusually valuable.

Can a non-taxpayer get pension tax relief?

Yes. Even with no earnings, you can pay in up to 3,600 pounds gross a year and receive basic-rate relief, so 2,880 pounds becomes 3,600 pounds in the pension. This is useful for non-earning spouses and children's pensions.

Is pension growth taxed?

No. Investments inside a pension grow free of UK income tax and capital gains tax. Tax applies only when you draw the pension, and then only on the part above the 25 percent tax-free element, at your marginal rate at the time.

Does the 2027 Inheritance Tax change affect tax relief?

No, it does not change relief on contributions or tax-free growth. From 6 April 2027 most unused pension funds will be brought into the estate for Inheritance Tax, which affects how a large pot is passed on rather than the relief received while saving. Those with substantial pensions should review their plans.