Pension contributions can be one of the best ways to reduce tax drag. The danger is assuming every pension contribution is automatically clean. Annual allowance, taper, MPAA, carry forward, salary sacrifice and adjusted net income all need their own checks.
This page is the trap checklist. The Pension Academy and calculators hold the detailed explanations and numbers.
Scope guard: avoiding overlap
| Use | Boundary |
|---|---|
| Use this page for | Knowing which pension tax trap might apply before contributing, sacrificing or drawing. |
| Use another page for | Projection, allowance calculations, drawdown tax or beginner pension education. |
Contribution traps
| Trap | Trigger | What to open |
|---|---|---|
| Annual allowance | Total pension input exceeds the annual allowance. | Pension annual allowance calculator. |
| Tapered annual allowance | High threshold income and adjusted income. | Taper/annual allowance calculator. |
| Carry forward mistake | Using old allowance without checking scheme membership and current-year rules. | Carry forward calculator. |
| Relevant earnings cap | Personal contributions exceed relevant UK earnings for tax relief. | Pension Academy and official guidance. |
Access traps
- Flexibly accessing a defined contribution pension can trigger the Money Purchase Annual Allowance.
- Taking a large taxable withdrawal can push more pension income into higher tax bands.
- Taking tax-free cash without a plan can reduce later flexibility.
- Drawdown decisions should be tested against State Pension date, ISA bridge, cash buffer and sequence risk.
Salary sacrifice and adjusted net income
- Salary sacrifice can reduce adjusted net income, which matters for the Personal Allowance taper, Child Benefit, Tax-Free Childcare and childcare eligibility.
- From April 2029, official GOV.UK guidance says only the first £2,000 of employee pension contributions through salary sacrifice each year will be exempt from National Insurance; income tax treatment remains subject to the usual pension limits.
- This means older salary-sacrifice examples should be treated carefully when planning beyond 6 April 2029.
Worked examples: four traps in numbers (2026/27)
The figures below use the 2026/27 income tax rates for England, Wales and Northern Ireland. Scottish income tax rates differ, which changes the tax amounts but not the allowance rules.
1. Tapered annual allowance
Threshold income is £230,000 and adjusted income, which adds employer pension contributions back in, is £300,000. Both limits are exceeded (threshold income over £200,000 and adjusted income over £260,000), so the £60,000 annual allowance falls by £1 for every £2 of adjusted income above £260,000. That is £20,000 less, leaving £40,000; the allowance cannot fall below £10,000. If total pension savings for the year are £55,000 and no carry forward is available, £15,000 is excess. The excess is taxed as the top slice of income, so for an additional-rate taxpayer the charge is £6,750.
2. Money purchase annual allowance
A 58-year-old takes an uncrystallised funds pension lump sum, which triggers the money purchase annual allowance. Later that tax year they pay £14,000 into a defined contribution pension. The limit for those contributions is now £10,000, so £4,000 is excess, and unused annual allowance from earlier years cannot be added to the £10,000 to cover it. At the higher rate the charge is £1,600.
3. Relief limited to earnings
Tax relief on personal contributions is limited to 100% of annual earnings. Someone earning £30,000 who pays £40,000 gross into a personal pension receives relief on £30,000 only. With no earnings at all, relief at source still applies to contributions of up to £2,880 a year, which the basic-rate top-up turns into £3,600.
4. Adjusted net income and the Personal Allowance
Salary is £110,000, so adjusted net income is £10,000 above £100,000 and £5,000 of the Personal Allowance is lost. Paying £8,000 into a relief-at-source pension attracts a £2,000 basic-rate top-up, making a £10,000 gross contribution. Adjusted net income falls by that grossed-up £10,000 to £100,000, restoring the full £12,570 allowance. Income tax for the year falls from £33,432 to £29,432, and the £4,000 difference is claimed back from HMRC, through Self Assessment or, without a tax return, by claiming directly from HMRC. The pension receives £10,000 at a net cost of £4,000: effective relief of 60%.
Common mistakes, and when to get help
- Leaving employer contributions out of adjusted income when testing the taper.
- Carrying forward from a year with no membership of a UK registered pension scheme or a qualifying overseas pension scheme, which is not allowed. Unused allowances from earlier years are used from the earliest year first.
- Assuming the pension scheme will pay any charge. A scheme has to pay on request only where the charge is more than £2,000 and the pension savings in that scheme alone exceed the standard £60,000 annual allowance, even for someone whose allowance is tapered. Outside those conditions a scheme may agree to pay voluntarily, but the charge remains the member's liability.
- Not reporting. Excess pension savings go in the Pension savings tax charges section of a Self Assessment return, whoever pays the charge.
For contributions large enough to test the taper or the money purchase annual allowance, the calculators linked above give a first estimate. A regulated financial adviser or a chartered tax adviser can check the position before the money is paid in.
The UKTAXDRAG rule
Identify the threshold first, then use the calculator. Hidden tax drag usually comes from stacking effects, not from one visible headline rate.
Official sources and further guidance
- GOV.UK: pension annual allowance
- GOV.UK: work out tapered annual allowance
- GOV.UK: adjusted net income
- GOV.UK: salary sacrifice pension changes from April 2029
- HMRC Pensions Tax Manual PTM056110: rate of the annual allowance charge
- GOV.UK: check unused annual allowances (carry forward)
- HMRC Pensions Tax Manual PTM056510: money purchase annual allowance
- GOV.UK: pension tax relief limits
- GOV.UK: Personal Allowance on income over £100,000
Frequently asked questions
The questions readers most commonly ask about this topic. Each answer is reviewed by the Editor against current HMRC, FCA and MoneyHelper guidance.
▸ What is the pension tapered annual allowance?
High earners see their £60,000 annual allowance reduced by £1 for every £2 of "adjusted income" above £260,000, down to a minimum of £10,000 at £360,000, but only if their "threshold income" is also over £200,000. The complication: adjusted income includes employer pension contributions and adds back your own, so paying more into a pension does not reduce it, and a large employer contribution can push adjusted income over £260,000.
▸ What is the Money Purchase Annual Allowance (MPAA)?
The MPAA is a £10,000 annual cap on pension contributions that triggers automatically the moment you take ANY taxable income from a flexible drawdown pension. Taking only the 25% tax-free lump sum doesn't trigger it; taking £1 of taxable income does. The MPAA is irreversible — once triggered, it applies for all future years.
▸ What is the lifetime allowance (LTA) replacement?
The £1,073,100 LTA was abolished in April 2024 and replaced by two separate lifetime caps: Lump Sum Allowance (LSA) of £268,275 on tax-free cash, and Lump Sum and Death Benefit Allowance (LSDBA) of £1,073,100 on combined lifetime tax-free and death-benefit lump sums. The day-to-day cap on what your pension can grow to has been removed, but the lump-sum-extraction caps remain meaningful for high savers.
▸ How does pension tax relief work for higher-rate taxpayers?
The pension provider always reclaims basic-rate (20%) tax relief at source — added to your pension automatically. Higher-rate (40%) and additional-rate (45%) taxpayers must claim the extra 20%/25% via Self Assessment (or sometimes via PAYE adjustment). This means a £100 net contribution becomes £125 in your pension, then refunds an additional £25 or £31.25 to you via tax adjustment — total tax relief 40% / 45%.
▸ What happens to my pension if I die?
Defined contribution pensions pass to nominated beneficiaries outside your estate (so usually no IHT) as either a lump sum or beneficiary drawdown. Pre-75 death: beneficiary can take it tax-free. Post-75 death: beneficiary pays income tax at their marginal rate as they draw it. That changes for deaths on or after 6 April 2027: Finance Act 2026, which received Royal Assent on 18 March 2026, brings most unused pension funds and pension death benefits into the value of the estate for Inheritance Tax. Death-in-service benefits, and dependants' scheme pensions from defined benefit or collective money purchase arrangements, are excluded, and death benefits passing to a spouse or civil partner stay exempt.
▸ What is "scheme pays" for tax charges?
If you exceed the annual allowance and owe an Annual Allowance tax charge, you can ask the pension scheme to pay it out of your fund (so you don't pay from cash). This works for charges over £2,000 if it relates to allowance breaches in that pension. The cost: your pension pot reduces. Useful in years when bonus contributions push you over the allowance but cash to pay HMRC is unavailable.
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