UK pension tax relief is the most generous part of the personal-tax system. Get it right and £100 in your pension can cost as little as £55 net. Get it wrong—by missing higher-rate relief, breaching the annual allowance, or triggering the Money Purchase Annual Allowance—and the tax efficiency disappears or, worse, you owe HMRC.
This article is a reference for the rules in 2026/27, with worked examples for the situations where the maths is unintuitive enough to catch people out.
The core mechanic
Pension contributions get income tax relief at your marginal rate. If you pay 40% income tax, contributing £100 saves £40 of tax—making the net cost £60. If you pay 45%, the net cost is £55.
The mechanism differs by scheme type:
Net pay schemes (most workplace pensions)
Your contribution is deducted from gross salary before income tax is calculated. You pay tax on a smaller gross. The relief is automatic and immediate.
Relief at source (most personal pensions, SIPPs, some workplace schemes)
You contribute from net (post-tax) income. The provider claims back 20% from HMRC. Higher and additional-rate taxpayers reclaim further relief through Self Assessment.
The total relief is the same. The mechanism—and importantly, who has to claim it—differs, which is where higher-rate taxpayers most often leave money on the table.
Tax bands and pension relief in 2026/27
| Band | Income | Marginal rate | Net cost of £100 in pension |
|---|---|---|---|
| Personal allowance | Up to £12,570 | 0% | £100 |
| Basic rate | £12,570 – £50,270 | 20% | £80 |
| Higher rate | £50,270 – £125,140 | 40% | £60 |
| Personal allowance taper | £100,000 – £125,140 | 60% effective | £40 |
| Additional rate | Over £125,140 | 45% | £55 |
The 60% effective rate in the £100k–£125k band comes from the personal allowance being reduced £1 for every £2 of income above £100k. Pension contributions can lower your “adjusted net income” back below £100k, restoring the personal allowance—and giving 60% relief on those contributions.
This is the highest single tax relief available to a UK taxpayer.
The £60,000 annual allowance
For 2026/27, the annual allowance is £60,000 (or 100% of relevant UK earnings, whichever is lower). It applies across:
- Workplace pension contributions (yours and employer’s).
- SIPP contributions.
- Salary sacrifice contributions—yes, they count.
The allowance is tested at the end of each tax year. Contributions over the allowance are subject to an “annual allowance charge” at your marginal rate—which essentially claws back the tax relief on the excess.
Carry-forward
You can use unused annual allowance from the previous three tax years. The current year’s allowance is used first, then back through the prior years.
A worked example. Bonuses in March push you to want to make a £150,000 pension contribution. Carry-forward enables this if:
- You have been a member of a UK registered pension scheme throughout the prior three years.
- Your earnings this year are at least £150,000.
- The total contribution does not exceed £60,000 (current) + £60,000 (year –1) + £60,000 (year –2) + £60,000 (year –3) = £240,000 maximum.
- You have not used carry-forward already in those years.
Carry-forward is the lever for one-off windfalls—a sale of a business, an inheritance, a large bonus. For most regular savers it does not apply; they are nowhere near £60k a year in the first place.
The tapered annual allowance (for high earners)
If you have adjusted income over £260,000 in 2026/27, your annual allowance tapers down. For every £2 of income over £260,000, your allowance drops by £1. The minimum tapered allowance is £10,000.
So at adjusted income of £360,000+, your annual allowance is just £10,000.
“Adjusted income” includes most income plus pension contributions made by your employer. It is a complex calculation—high earners should usually take regulated advice rather than back-of-envelope it.
Money Purchase Annual Allowance (MPAA)
The MPAA caps annual contributions to a defined contribution pension at £10,000 if you have already accessed pension benefits “flexibly”—e.g. via flexi-access drawdown.
It does not apply if you have only:
- Taken your tax-free cash (the 25% lump sum).
- Bought a lifetime annuity.
- Drawn capped drawdown income (a legacy product).
It does apply once you take taxable income from drawdown.
The MPAA is designed to prevent “recycling”—withdrawing tax-free cash, then contributing it back for fresh tax relief. If you are considering accessing pension benefits while still working, get advice on the MPAA implications first; it is a one-way door.
Higher-rate relief—the bit most people miss
If you are a higher or additional-rate taxpayer and your pension is on relief-at-source (most SIPPs and some workplace schemes), you only get the basic-rate 20% automatically. The additional 20% (or 25% for additional-rate) needs to be claimed back via Self Assessment.
A surprisingly large proportion of higher-rate taxpayers either do not realise this or never get round to filing.
To claim:
- Note your gross pension contributions from each tax year (if relief-at-source: the amount you paid + 25%, since basic-rate relief is added by the provider).
- Enter the gross contributions on your Self Assessment under “Pension contributions where basic-rate relief has been given”.
- HMRC adjusts your tax code or sends a refund.
You can claim back up to 4 tax years retrospectively.
For someone earning £80,000 contributing £4,000 a year via a relief-at-source SIPP, the missed higher-rate relief is £1,000 per year. Over four years, £4,000 of refund—a small amount of paperwork separating you from a long weekend’s worth of family income.
Salary sacrifice and tax relief
Salary sacrifice gives the same income tax relief as a direct contribution, but adds National Insurance savings on top. It is structurally different—your gross salary is reduced rather than you contributing from net pay—so it does not go through Self Assessment.
For details, see salary sacrifice pension explained.
Tax-free cash and how it works at retirement
Most defined contribution pensions allow you to take 25% of the pot tax-free at retirement (capped at £268,275 for those without protected lump sums).
The remaining 75% is taxed as income when withdrawn. So if you take a single big lump sum at retirement, that can push you into higher-rate or additional-rate tax for the year.
A tax-efficient pattern for many retirees:
- Take 25% tax-free cash gradually over several years using “Uncrystallised Funds Pension Lump Sum” or staged drawdown.
- Withdraw taxable income up to your personal allowance + basic-rate band each year.
- Combine with State Pension and ISA withdrawals for tax-optimised retirement income.
The mechanics are complex—see drawdown vs annuity UK for retirement-stage planning.
Inheritance tax change from April 2027
Until April 2027, defined contribution pensions sit outside the estate for inheritance tax purposes—making them powerful inheritance tools.
From April 2027, most pension pots are brought into the estate for IHT. If your estate is over £1m, this can trigger 40% inheritance tax on the pension at death.
Implications:
- The “leave the pension untouched, draw on ISAs and savings first” strategy is less attractive than it was.
- Estate planning involving pension nominations should be reviewed.
- For most ordinary readers (estates under £1m including main residence relief), the change has limited practical impact.
A practical 2026/27 reference
| Scenario | What to do |
|---|---|
| Basic-rate, employed | Contribute up to employer match in workplace pension. Higher-rate not relevant. |
| Higher-rate, employed | Contribute generously. Salary sacrifice if available. Claim higher-rate relief on Self Assessment if relief-at-source. |
| £100k–£125k earner | Sacrifice aggressively to drop below £100k. 60% effective relief in this band. |
| Additional-rate, no taper | Contribute up to £60,000/year. 45% income tax + NI saved with sacrifice. |
| Adjusted income £260k+ | Annual allowance tapers. May be just £10,000. Take advice. |
| Already drawing flexibly | MPAA = £10,000 cap. Plan accordingly. |
| One-off large bonus | Use carry-forward—up to 3 prior years of unused allowance. |
For the bigger retirement picture, see our UK pensions and retirement guide.
What I’d check today
If you have never explicitly thought about pension tax relief:
- If you are a higher-rate taxpayer with a relief-at-source pension, check whether you have been claiming the extra relief. Up to four years can be reclaimed.
- If you are earning £100k–£125k, work out whether sacrificing more would lift you out of the 60% effective band.
- If you have recently moved jobs or had a big bonus year, check the £60k annual allowance has not been breached across all schemes.
- If you are approaching retirement and considering taking flexible income, understand the MPAA implications first.
Pension tax relief is the most generous tax break in the UK system. The mechanics reward people who pay attention—and quietly punish those who don’t.
Frequently asked questions
- How much tax relief do I get on pension contributions?
Tax relief is given at your marginal income tax rate. A basic-rate taxpayer gets 20%, a higher-rate taxpayer 40%, and an additional-rate taxpayer 45%. So £100 in the pension costs £80, £60, or £55 net respectively, before any National Insurance considerations.
- What is the pension annual allowance for 2026/27?
£60,000 per year, or 100% of your earned income—whichever is lower. Unused allowance from the previous three tax years can be carried forward, allowing higher earners to make a one-off contribution of up to £180,000 plus the current year's allowance, subject to other rules.
- What is the Money Purchase Annual Allowance?
The MPAA reduces your annual allowance to £10,000 once you've accessed defined contribution pension benefits flexibly (e.g. via flexi-access drawdown). Designed to prevent "recycling"—withdrawing tax-free cash and re-contributing for fresh relief.
