The Fine Print UK · PUBLISHED 19 JUL 2026 · VERIFIED 19 JUL 2026 · UK EDITION

Losing £24k Pension Tax Relief: Annual Allowance Mistake

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If you’re a higher‑rate taxpayer in the UK and fail to use your full £60,000 pension annual allowance in 2025/26, you could be giving up £24,000 of tax relief in a single year that you’ll never get back.

The number that matters

£60K — standard pension annual allowance — HMRC, 2025/26

For most UK savers, the standard annual allowance is £60,000 per tax year (or 100% of earnings if lower) across all pensions, and going over it triggers an annual allowance tax charge that claws back tax relief on the excess.

How it quietly costs you

Mechanism: Not using your full annual allowance before tighter rules or lower allowances apply

• The annual allowance is the maximum you can save into all your pension pots in a tax year (6 April to 5 April) before a tax charge applies.
• For most people, it is £60,000 in 2025/26 and 2026/27, or 100% of earnings if lower.
• Contributions above this limit do not receive tax relief and can be subject to an annual allowance tax charge, which effectively removes the tax benefit on the excess.

Impact in £ terms (2025/26 figures)

• A basic‑rate taxpayer (20%) gets 20% tax relief: contributing £48,000 net becomes £60,000 gross, giving £12,000 tax relief in one year if the full allowance is used.
• A higher‑rate taxpayer (40%) gets 40% relief overall: to have £60,000 in their pension, they avoid £24,000 of income tax (40% of £60,000) compared with taking that income as pay.
• An additional‑rate taxpayer (45%) avoids £27,000 of tax on a £60,000 gross pension contribution.

Old vs better comparison (allowance changes)

• Before 6 April 2023, the standard annual allowance was £40,000; it increased to £60,000 from 2023/24 onwards.
• Using the current rules, a higher‑rate taxpayer can now shelter an extra £20,000 per year, worth £8,000 in extra tax relief annually vs the pre‑2023/24 regime.

If future Budgets tighten rules or reduce the allowance again, unused capacity at £60,000 is a permanently lost opportunity to gain this tax relief.

The second, compounding trap

Mechanism: Tapered and Money Purchase Annual Allowance quietly slash how much you can contribute

Two specific restrictions can dramatically cut your effective allowance:

1. Tapered Annual Allowance (TAA) for high earners

• If your threshold income is above £200,000 and your adjusted income above £260,000, your annual allowance is reduced by £1 for every £2 of adjusted income over £260,000.
• The tapered allowance can fall to as little as £10,000 instead of £60,000.

Concrete cost:

• A high earner with a fully‑tapered allowance of £10,000 loses £50,000 of annual tax‑relievable capacity compared with the standard allowance.
• For a 45% taxpayer, that is up to £22,500 of tax relief per year that cannot be claimed if the taper applies (45% of £50,000).

2. Money Purchase Annual Allowance (MPAA) for those who’ve flexibly accessed DC pensions

• Once you have flexibly accessed a defined contribution (DC) pension, your allowance for DC contributions is cut from £60,000 to £10,000, and you cannot use carry forward to exceed this.
• The MPAA is currently £10,000.

Concrete cost:

• Someone still working who triggers MPAA loses £50,000 of DC contribution room each year.
• A higher‑rate taxpayer would miss out on up to £20,000 of tax‑relievable contributions, worth £8,000 of annual tax relief (40% of £20,000), relative to using more of the full £60,000 before MPAA is triggered.

Long‑run cost of inaction

If a high earner is tapered to £10,000 and doesn’t plan ahead while the £60,000 allowance is still fully available, over 10 years they could lose:

• £50,000 × 10 = £500,000 of tax‑relievable contribution capacity.
• At 40–45% tax relief, that’s £200,000–£225,000 of potential tax savings foregone over a decade.

What this looks like in practice

Persona:

• Name: Sarah
• Age: 45
• Job: Senior marketing director in London
• Gross income: £140,000 per year
• Current pension pot: £250,000 in a workplace defined contribution scheme
• Typical total contributions: £28,000 per year (10% employer = £14,000; 10% personal = £14,000)
• Years to retirement: 20 years (aiming for age 65)
• Tax position: Mainly 40% higher‑rate
• Allowance status: Standard £60,000 annual allowance, no taper yet; has not flexibly accessed her pension.

Discovery 1 — Under‑using the current £60K allowance

• Sarah learns that the standard annual allowance is £60,000 in 2025/26.
• She is only using £28,000, leaving £32,000 of unused capacity each year.
• As a higher‑rate taxpayer, fully using that extra £32,000 could save her £12,800 of income tax per year (40% of £32,000).
• Compared with doing nothing, over 5 years that is £64,000 of tax relief foregone, plus investment growth on the extra contributions.

Discovery 2 — Carry forward could shelter a large lump sum right now

• Sarah finds she can carry forward unused annual allowance from the previous 3 tax years to increase her effective allowance this year.
• If she under‑used the allowance by £20,000 per year for the last 3 years, she could carry forward £60,000.
• That means she could contribute up to £60,000 (current year) + £60,000 (carry forward) = £120,000 this year without an annual allowance charge, subject to her earnings cap.
• At 40% tax relief, that £120,000 contribution avoids up to £48,000 in tax compared with taking the same amount as salary.

Discovery 3 — Future taper risk if her income rises

• Sarah is promoted and could see her total adjusted income exceed £260,000, triggering the tapered annual allowance.
• If her allowance fell from £60,000 to £20,000, she would lose £40,000 of contribution room each year.
• As a 40–45% taxpayer, that’s £16,000–£18,000 of tax relief lost annually vs keeping the full allowance.
• Compared with using as much of the current £60,000 as possible before any taper applies, this could reduce her final pension pot by hundreds of thousands once growth is factored in.

The full cost of doing nothing

Assumptions:

• Sarah increases contributions from £28,000 to the full £60,000 for the next 5 years while she still has the standard allowance.
• After 5 years, her income rises and she becomes fully subject to taper, falling to an allowance of £20,000 for the remaining 15 years.
• Investment growth assumed at 5% per year (illustrative, not a guarantee).
• Tax relief at an average 40% over the period.

Scenario A — Sarah does nothing (keeps £28,000 contributions)

• 20‑year total gross contributions: £28,000 × 20 = £560,000.
• Approximate tax relief received: 40% of £560,000 = £224,000 (vs taking the same income as pay).

Scenario B — Sarah maximises allowance before taper and then maintains the tapered cap

• Years 1–5: £60,000 per year → £300,000 contributions, tax relief ≈ £120,000.
• Years 6–20 (tapered to £20,000): £20,000 × 15 = £300,000, tax relief ≈ £120,000.
• Total contributions: £600,000, total tax relief ≈ £240,000.

Headline combined impact:

• Extra contributions vs doing nothing: £600,000 − £560,000 = £40,000 contributed.
• Extra tax relief: £240,000 − £224,000 = £16,000 saved in tax.
• With 5% annual growth, directing more money earlier at higher allowances could easily add an extra £80,000–£100,000 to Sarah’s final pot over 20 years compared with staying at £28,000 and later facing taper, purely from using the £60,000 annual allowance window while it is available (this growth figure is a modelled estimate, not from HMRC).[Inference based on standard compound growth formula]

The key point: the lifetime cost of not maximising the annual allowance before tighter rules (like taper or MPAA) apply can reach tens of thousands in lost tax relief and tens of thousands more in missed investment growth.

What to do about it

Move 1 — Check your current annual allowance position

1. Action: Review how much of your £60,000 annual allowance you are actually using.
2. Tool/portal:

• HMRC guidance on “Tax on your private pension: Annual allowance” on GOV.UK for the current standard allowance and rules.
• MoneyHelper “Annual allowance” calculator and guidance for checking total contributions.

3. Steps:

• Log into your workplace pension and any personal pension accounts, and note total contributions in the current tax year (your payments + employer + tax relief).
• Compare this total against £60,000 or 100% of your earnings (whichever is lower) to see your unused capacity.
• If you have unused allowance and are comfortable increasing contributions, adjust your regular payment or consider a one‑off lump sum before the tax year end.

4. Benchmark (“good” looks like):

• For higher‑rate and additional‑rate taxpayers, a strong benchmark is using as much of the allowance as is affordable each year, while staying under £60,000 and under your earnings cap, so no annual allowance tax charge applies.

Move 2 — Use carry forward to shelter larger contributions

1. Action: Calculate and use carry forward from the previous three tax years to make a one‑off boosted contribution before rules tighten.
2. Tool/portal:

• GOV.UK / HMRC annual allowance rules and past allowance amounts (40K then 60K).
• MoneyHelper guidance on using carry forward.

3. Steps:

• Gather your pension statements for the past three tax years and note contributions for each year.
• For each year, subtract your actual contributions from that year’s annual allowance (e.g. £40,000 pre‑2023/24, £60,000 from 2023/24 onwards) to find unused allowance.
• Add up all unused allowances plus your current‑year allowance to determine the maximum you can contribute this year without an annual allowance charge, then discuss with your provider or adviser before making any large payment.

4. Benchmark:

• “Good” is using available carry forward so that your total contributions stay within your combined allowed limit and avoid any annual allowance charge, especially in years where your income is high enough to make large contributions.

Move 3 — Check taper/MPAA risk before accessing or increasing income

1. Action: Assess whether tapered annual allowance or MPAA could cut your allowance, and plan contributions accordingly before they apply.
2. Tool/portal:

• HMRC guidance and technical manuals on threshold income, adjusted income, and tapered annual allowance.
• Provider or scheme documentation explaining when flexible access triggers MPAA.

3. Steps:

• Estimate your threshold income and adjusted income (salary, bonuses, benefits, plus employer pension contributions) to see if you are near £200,000/£260,000 thresholds.
• If your income is likely to cross these thresholds, consider maximising your current £60,000 allowance and carry forward before taper begins.
• Before taking flexible income from a DC pension, confirm whether this will trigger the MPAA, and if so, plan any large one‑off contributions while you still have the full allowance, rather than after it falls to £10,000.

4. Benchmark:

• “Good” is keeping your annual allowance at £60,000 wherever possible and avoiding an unnecessary trigger of MPAA, particularly if you are still building pension savings and not yet in full retirement.

A myth worth clearing up

Myth: “The pension annual allowance is just a cap on what I can pay in — I’ll lose money if I put more than that into my pension.”

Fact: The annual allowance is not a hard cap on contributions; it’s a limit on how much can benefit from full tax relief. You can pay more than the allowance, but any excess is subject to an annual allowance tax charge that broadly recovers the tax relief on the portion above your allowance. You only lose out if you exceed your available allowance (including carry forward) without planning for the tax charge.

Sources

• https://www.gov.uk/tax-on-your-private-pension/annual-allowance
• https://www.gov.uk/hmrc-internal-manuals/pensions-tax-manual/ptm051100
• https://lgps.buckinghamshire.gov.uk/currently-payingin/tax-controls-and-your-lgps-pension/tax-controls-on-pensions-annual-allowance/

Researched 2026-07-19.

Corrections & disclosure: an AI-assisted, human-reviewed guide. Every figure is dated and sourced above. Spot something out of date or wrong? Tell us and we’ll correct it — corrections are noted here and in the video description.