Pension Carry Forward: Using Unused Annual Allowance
Had a bonus year, received an inheritance, or simply not contributed much to your pension recently? Carry forward lets you use up to three years of unused pension annual allowance, potentially allowing contributions of well over £100,000 in a single tax year.
What Is Pension Carry Forward?
The pension annual allowance is the maximum amount of tax-relieved pension contributions you can make in a single tax year. For 2024-25, the standard annual allowance is £60,000 (or 100% of your earnings, whichever is lower). This includes both your personal contributions and any employer contributions.
Carry forward is an HMRC rule that allows you to use any unused annual allowance from the previous three tax years, provided you were a member of a registered pension scheme during those years. You do not need to have actually made contributions in those years — you simply need to have been enrolled in a scheme.
The current year's allowance is always used first. Only once that is exhausted do you dip into carried-forward allowance, starting with the oldest unused year.
Key requirement: You must have been a member of a UK-registered pension scheme in each of the tax years you wish to carry forward from. Even a dormant workplace pension counts, but if you had no pension membership at all in a given year, you cannot carry forward from that year.
How the Maths Works
To calculate your available carry forward, add up the unused allowance from each of the previous three tax years. The annual allowance has been £60,000 since 2023-24 (it was £40,000 for many years before that).
Example: Calculating carry forward
Tom wants to make a large pension contribution in 2024-25. His contribution history:
- 2021-22: Allowance £40,000 − contributed £10,000 = £30,000 unused
- 2022-23: Allowance £40,000 − contributed £8,000 = £32,000 unused
- 2023-24: Allowance £60,000 − contributed £12,000 = £48,000 unused
- 2024-25: Current year allowance = £60,000
Tom's total available: £60,000 + £30,000 + £32,000 + £48,000 = £170,000
He can contribute up to £170,000 this tax year (subject to having sufficient earnings).
Remember that your contributions cannot exceed your relevant UK earnings for the tax year. If Tom earns £80,000, his personal contributions are capped at £80,000 (with tax relief). However, employer contributions do not have this earnings cap — if Tom's employer contributes through salary sacrifice or an employer-only contribution, the combined total can exceed his salary, up to the available allowance.
When Carry Forward Is Most Useful
Several life events create ideal opportunities to use pension carry forward:
Bonus or windfall years
If you receive a large bonus, a commission payout, or proceeds from selling a business, carry forward lets you shelter a significant sum in your pension rather than paying income tax at your marginal rate. A £100,000 bonus taxed at 45% costs you £45,000 in tax. Diverting it into your pension saves that entire amount whilst boosting your retirement pot.
Inheritance or property sale
When you come into a lump sum that you do not need immediately, carry forward allows you to fund your pension aggressively for one year. The tax relief effectively gives you a guaranteed return on your contribution, making it one of the most efficient uses of surplus capital.
Approaching retirement
If you are in your 50s or 60s and realise your pension is not on track, carry forward offers a way to make up for lost ground. Three years of unused allowance plus the current year can add over £200,000 to your pot in a single year if you have the earnings and the available allowance.
Business owners take note
If you run a limited company, employer pension contributions are a tax-deductible business expense. Your company can contribute to your pension using carry forward, reducing corporation tax in the process. This is often more tax-efficient than taking the same amount as salary or dividends.
Interaction with the Tapered Annual Allowance
High earners need to be aware of the tapered annual allowance. If your "adjusted income" exceeds £260,000, your annual allowance is reduced by £1 for every £2 over this threshold, down to a minimum of £10,000. This means earners above £360,000 have only £10,000 of annual allowance.
The taper also affects how much carry forward you have available. In years where the taper applied and reduced your allowance, the unused amount is calculated based on the tapered allowance, not the standard £60,000. If your tapered allowance was £20,000 and you contributed £20,000, you have nothing to carry forward from that year.
Example: Carry forward with tapering
Emma earned £300,000 in 2023-24. Her adjusted income triggered the taper:
Taper reduction: (£300,000 − £260,000) ÷ 2 = £20,000 reduction
Her allowance was £60,000 − £20,000 = £40,000
She contributed £15,000, leaving £25,000 unused to carry forward.
In 2024-25, if Emma's income drops below £260,000 (perhaps she took a sabbatical), her full £60,000 allowance is restored, plus she can carry forward the £25,000.
This creates a useful planning opportunity. If you know your income will fluctuate — for example, you are taking a career break, going part-time, or your bonus varies year to year — you can time large pension contributions for lower-income years when the taper does not apply, using carry forward from higher-income years.
The Money Purchase Annual Allowance Trap
There is one critical exception to carry forward rules. If you have flexibly accessed your defined contribution pension (taken income through drawdown or an uncrystallised funds pension lump sum beyond the tax-free portion), you trigger the Money Purchase Annual Allowance (MPAA) of just £10,000. Once triggered, you lose the right to carry forward entirely for money purchase (defined contribution) pensions.
This is a permanent restriction. You cannot un-trigger the MPAA. If you are considering accessing your pension flexibly, think carefully about whether you might want to make further contributions using carry forward in future years.
MPAA exceptions: Taking your 25% tax-free lump sum alone does not trigger the MPAA. Nor does taking a small pot lump sum (from a pot worth £10,000 or less). Only flexible income withdrawals from drawdown or UFPLS payments trigger it.
How to Use Carry Forward in Practice
There is no special form to fill in or prior approval needed from HMRC. You simply make the contribution to your pension provider and declare it on your self-assessment tax return. Your provider will claim basic-rate relief (20%) automatically on personal contributions, and you claim any higher or additional-rate relief through self-assessment.
Keep records of your pension contributions for each of the previous three tax years, including employer contributions. Your annual pension statement or P60 will show these figures. If you are uncertain about your available carry forward, a financial adviser or accountant can help you calculate the precise amount.
- Check your contribution history for the past three tax years with each pension provider
- Verify you were a pension scheme member in each year you wish to carry forward from
- Confirm your adjusted income to check whether the tapered annual allowance applied
- Ensure your contribution does not exceed your earnings for the current tax year (for personal contributions)
- Make the contribution before 5 April to use the current tax year's carry forward window
Calculate Your Carry Forward Allowance
Model exactly how much unused pension allowance you can reclaim from previous years.
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