Pension Tax Relief Explained: Annual Allowance, Taper, Carry Forward, and Salary Sacrifice
Pension contributions are one of the most powerful tax-saving tools available to UK taxpayers. Every pound you put into a pension reduces your taxable income, and the government adds tax relief at your marginal rate. A higher rate taxpayer contributing £10,000 into a pension effectively pays only £6,000 out of pocket (after 40% relief). For someone caught in the 60% trap between £100,000 and £125,140, the effective cost drops to just £3,800. No other widely available tax relief in the UK system comes close.
How pension tax relief works
There are two methods of receiving pension tax relief, depending on the type of pension scheme.
Relief at source (personal pensions, SIPPs)
You contribute from your net (after-tax) pay. The pension provider claims basic rate relief (20%) from HMRC and adds it to your pension pot. If you are a higher or additional rate taxpayer, you claim the extra relief through your Self Assessment return.
Example: you want to contribute £10,000 gross into your SIPP. You pay £8,000, the pension provider claims £2,000 from HMRC (20% basic rate relief). If you pay 40% tax, you claim an extra £2,000 through Self Assessment, making your net cost £6,000.
Net pay arrangement (most workplace pensions)
Your employer deducts the contribution from your gross pay before calculating Income Tax. You get full relief at your marginal rate automatically through the payroll. No Self Assessment claim is needed. This is the more common arrangement for workplace pensions and is administratively simpler.
The Annual Allowance: £60,000
For 2025-26, you can contribute up to £60,000 per year to pensions and receive tax relief. This limit covers the total of:
- Your personal contributions (including basic rate relief added by the provider)
- Your employer's contributions
- Any contributions made by a third party on your behalf
If your total contributions exceed £60,000 in a tax year, the excess is added back to your taxable income and taxed at your marginal rate. This is the Annual Allowance Charge. It is reported and paid through Self Assessment.
There is also an earnings limit: tax-relieved contributions cannot exceed 100% of your UK earnings in the year. A non-earner can still contribute up to £3,600 gross (£2,880 net plus £720 basic rate relief) even with no earnings.
The Tapered Annual Allowance
High earners face a reduced Annual Allowance. The taper applies if both of the following conditions are met:
- Your "threshold income" exceeds £200,000 (broadly, your total income before pension contributions)
- Your "adjusted income" exceeds £260,000 (your income plus employer pension contributions)
For every £2 of adjusted income above £260,000, the Annual Allowance is reduced by £1. The minimum tapered allowance is £10,000, which applies at adjusted income of £360,000 or above.
| Adjusted Income | Tapered Annual Allowance |
|---|---|
| £260,000 or below | £60,000 (full allowance) |
| £280,000 | £50,000 |
| £300,000 | £40,000 |
| £320,000 | £30,000 |
| £340,000 | £20,000 |
| £360,000 or above | £10,000 (minimum) |
The threshold income test exists to prevent the taper from catching people who are only high earners because of large employer pension contributions. If your income before pension contributions is below £200,000, the taper does not apply regardless of your adjusted income.
Carry forward: using unused allowance from previous years
If you did not use your full Annual Allowance in any of the previous three tax years, you can carry forward the unused amount and add it to this year's allowance. This is a valuable planning tool for people with variable income or those who want to make a large one-off contribution.
Example: your Annual Allowance is £60,000 per year. In the three previous years, you contributed £20,000, £30,000, and £25,000. Your unused allowances were £40,000, £30,000, and £35,000 respectively, totalling £105,000. Combined with this year's £60,000 allowance, you could contribute up to £165,000 in a single year (subject to the earnings limit).
Carry forward uses the oldest year's unused allowance first. You must have been a member of a registered pension scheme in each year you are carrying forward from (even if you made no contributions that year).
Salary sacrifice for pensions
Salary sacrifice is an arrangement where you agree to reduce your contractual salary and your employer contributes the difference into your pension. The key advantage: because the contribution is made by the employer (from the salary you gave up), it is exempt from employee NI (8% or 2%) and employer NI (15%).
Example: you earn £60,000 and sacrifice £10,000 into your pension.
- Your contractual salary drops to £50,000.
- You save Income Tax at 40%: £4,000.
- You save employee NI at 2%: £200.
- Your employer saves 15% employer NI: £1,500.
Total combined saving: £5,700 on a £10,000 contribution. Many employers pass on some or all of their NI saving to the employee (either as additional pension contributions or salary top-ups), making salary sacrifice even more attractive.
Salary sacrifice is especially powerful in the 60% taper zone (£100,000-£125,140), where the effective tax relief on pension contributions can exceed 60%. Model salary sacrifice with our calculator.
Pension contributions to manage the Personal Allowance taper
If your income falls between £100,000 and £125,140, pension contributions can restore your Personal Allowance. Every £2 contributed reduces your adjusted net income by £2, restoring £1 of allowance. The effective relief rate in this band is 60% (Income Tax) plus 2% (NI through salary sacrifice) = 62%.
A common strategy: if your salary is £125,140, contributing £25,140 into a pension reduces your adjusted net income to £100,000, restores the full £12,570 Personal Allowance, and costs you only £9,553.20 after tax relief and NI savings. The £25,140 contribution produces £15,586.80 in tax and NI savings. See the pension breakdown for a £125,000 salary.
Lifetime Allowance: abolished from 2024-25
The Lifetime Allowance (LTA), which previously capped the total value of pension savings eligible for tax relief at £1,073,100, was abolished from 6 April 2024. There is no longer a tax charge on exceeding the LTA. However, the government introduced new limits on tax-free lump sums: the maximum tax-free lump sum is now capped at £268,275 (25% of the old LTA), and this is a lifetime limit that applies across all your pension schemes.
Pension relief for the self-employed
Self-employed individuals get pension relief at their marginal rate through Self Assessment. Contributions into a personal pension or SIPP are deducted from your taxable profits. If you contribute via a relief-at-source scheme, the pension provider claims basic rate relief and you claim the remainder on your tax return.
Class 4 NI is not reduced by pension contributions (unlike salary sacrifice for employees, which avoids employee NI). Self-employed people cannot use salary sacrifice because they do not have an employer. The tax relief is still valuable, but the NI saving available to employees through salary sacrifice is not available to the self-employed. Check self-employed tax at £50,000 with pension contributions.
Frequently asked questions
Can I get pension tax relief if I do not earn enough to pay tax?
Yes, up to a point. Anyone can contribute up to £3,600 gross per year into a pension and receive basic rate relief (20%), even with no earnings at all. You pay £2,880 and the pension provider claims £720 from HMRC. This is commonly used for non-working spouses, children, or retirees who want to continue building a pension pot.
What happens if I exceed the Annual Allowance?
The excess is added to your taxable income and taxed at your marginal rate via Self Assessment. If the charge exceeds £2,000, you can ask your pension scheme to pay it from your pension pot (this is called "Scheme Pays"). The deadline for notifying your scheme is 31 July following the end of the tax year. Exceeding the allowance does not invalidate your pension; it simply triggers a tax charge on the excess.
Does my employer's contribution count toward the Annual Allowance?
Yes. The £60,000 Annual Allowance covers the total of all contributions from all sources: personal, employer, and third-party. If your employer contributes £40,000, you can personally contribute a maximum of £20,000 in the same year (plus any carry forward from previous years).
Is pension salary sacrifice always better than a personal contribution?
For most employees, salary sacrifice is more tax-efficient because it saves NI for both the employee and employer. The exception is if your reduced salary after sacrifice would fall below important thresholds: the Lower Earnings Limit (£6,396) for State Pension credits, or the NI Primary Threshold (£12,570) for other benefit entitlements. Some employers also reduce other benefits (life insurance, sick pay) when your contractual salary drops. Check your employer's policy before committing to large salary sacrifice amounts.
Can I contribute to a pension on behalf of my spouse?
Yes. You can contribute to your spouse's or civil partner's pension without limit (subject to their own Annual Allowance and earnings cap). Your contribution to their pension does not use any of your own Annual Allowance. If your spouse has no earnings, they can still receive up to £3,600 gross per year with basic rate relief. There is no requirement for the contributor and the pension member to be the same person. Explore pension options for different salary levels.