Understanding exactly how much can be paid into a SIPP each year — and how much tax relief that attracts — involves more than just knowing a single headline number. The pension annual allowance, its taper for high earners, and the carry forward rules that let unused allowance be used from previous years all interact, and getting the detail right matters most for exactly the people most likely to be affected: higher earners and those making larger, irregular contributions.
The standard annual allowance
For the 2025/26 tax year, the standard pension annual allowance is £60,000, or 100% of an individual's UK relevant earnings for the year if that figure is lower. This allowance covers all pension contributions in a tax year — personal contributions, employer contributions, and any tax relief added — added together across all of an individual's pensions, not per scheme.
Contributions above the available allowance don't receive tax relief on the excess, and can trigger an annual allowance charge, which effectively claws back the tax relief that shouldn't have applied. This is why it matters to track total contributions across every pension held, not just a single SIPP in isolation.
The £3,600 minimum, regardless of earnings
Even someone with no earnings at all — including children, via a Junior SIPP, or a non-earning spouse — can still contribute up to £3,600 gross per year to a pension and receive basic rate tax relief on it, since the "100% of earnings" rule has this minimum floor built in.
The tapered annual allowance for high earners
Individuals with very high income have their annual allowance gradually reduced ("tapered") below the standard £60,000. The taper is based on two income measures — broadly, "threshold income" and "adjusted income" — and reduces the allowance by £1 for every £2 of adjusted income above the relevant threshold, down to a minimum tapered allowance. The precise thresholds and minimum floor are technical and have been adjusted by successive governments, so anyone who suspects they might be affected — typically those with total income well into six figures — should check current HMRC figures carefully or seek professional advice, since getting this wrong can result in unexpected tax charges.
Carry forward: using unused allowance from previous years
One of the most valuable but underused features of pension contribution rules is carry forward. If an individual didn't use their full annual allowance in any of the previous three tax years, they may be able to carry forward that unused amount and add it to the current year's allowance — potentially allowing a much larger contribution in a single tax year than the standard £60,000 would otherwise permit.
Conditions for using carry forward
- The individual must have been a member of a registered pension scheme in each of the years being carried forward from (even if no contributions were actually made that year).
- The current year's allowance must be used in full before carry forward from earlier years can be applied.
- The total contribution, including relief, still cannot exceed 100% of the individual's relevant UK earnings for the current tax year — carry forward extends the allowance ceiling but doesn't remove the earnings-based cap.
- Earlier years' allowance figures may differ from the current year's £60,000 (the allowance has changed over time), so each carried-forward year needs checking individually.
A worked example of carry forward
Suppose a self-employed consultant has a particularly strong year and earns £150,000, having earned more modestly in previous years and used only £15,000 of their annual allowance in each of the previous three tax years (assuming, for simplicity, the allowance was £60,000 in each of those years too). They want to make a large one-off pension contribution to reduce their tax bill and boost retirement savings.
Unused allowance from each of the past three years would be £45,000 per year (£60,000 minus £15,000 used), totalling £135,000 available to carry forward, on top of this year's own £60,000 allowance — a maximum theoretical contribution capacity of £195,000. However, because the contribution (including relief) cannot exceed 100% of relevant UK earnings in the current year, and this consultant earned £150,000, the actual maximum contribution this year would be capped at £150,000, even though the allowance-based capacity was higher. This is a simplified, hypothetical illustration — actual figures should always be checked with a pension provider or adviser, and earlier years' actual allowance figures confirmed.
Summary table
| Concept | Key detail |
|---|---|
| Standard annual allowance | £60,000, or 100% of relevant UK earnings if lower |
| Non-earner minimum | £3,600 gross, regardless of earnings |
| Tapered allowance | Reduced for very high earners, down to a minimum floor — check current thresholds |
| Carry forward | Unused allowance from the previous 3 tax years can be added, subject to scheme membership and earnings cap |
The Money Purchase Annual Allowance
Anyone who has already started flexibly accessing a defined contribution pension — for example, by taking a taxable lump sum or income through drawdown — usually triggers a much lower Money Purchase Annual Allowance (MPAA), significantly reduced from the standard £60,000, on any further defined contribution pension savings. This is designed to prevent "recycling" pension withdrawals back in as new contributions to claim additional tax relief. Crucially, taking only the tax-free lump sum from a pension, without touching the taxable portion, does not usually trigger the MPAA — but drawing any taxable income does. This distinction catches out some retirees who assume any pension access is treated the same way.
How employer contributions count towards the allowance
Employer contributions are not a separate, additional allowance — they count towards exactly the same £60,000 (or tapered, or MPAA-reduced) limit as personal contributions. An employee with a generous employer contribution alongside their own salary sacrifice arrangement can, in some cases, use up most or all of their annual allowance through employer contributions alone, leaving little room for further personal contributions in that tax year without triggering a charge.
What triggers an annual allowance charge
If total contributions across all pensions (including tax relief and any employer contributions) exceed the available allowance for the year — after applying any carry forward — the excess is subject to an annual allowance charge, effectively removing the tax advantage on that portion. This is calculated and reported via Self Assessment, and can come as an unwelcome surprise to those who haven't tracked their contributions carefully, particularly high earners with generous employer contributions who may not realise how close they are to the limit.
Practical steps for staying within limits
- Keep a running record of total contributions across all pensions each tax year, including employer contributions.
- If planning a large one-off contribution, check whether carry forward applies and confirm the exact unused allowance from each of the previous three years.
- High earners should check whether the tapered annual allowance might apply to them, given their specific income levels.
- Pension providers often issue annual statements showing contributions — reviewing these each year helps catch any risk of exceeding the allowance early.
Common mistakes to avoid
Forgetting to include employer contributions when checking the allowance
It's easy to track only personal contributions and overlook the employer's portion, which counts equally towards the same annual allowance. Someone reviewing "how much more can I contribute this year" needs the full picture across every source, not just their own payments.
Assuming carry forward is unlimited
Carry forward can only draw on the three previous tax years, and only where scheme membership existed in those years — it doesn't reach back indefinitely, and unused allowance from four or more years ago has simply expired and cannot be recovered.
Not checking the MPAA before making a further large contribution
An individual who has already flexibly accessed a defined contribution pension and forgets that this reduces their allowance for future contributions may inadvertently make a contribution well above their new, lower limit, triggering an unwelcome tax charge.
Frequently asked questions
Does the annual allowance reset on 6 April each year like the ISA allowance?
Yes — the pension annual allowance operates on the same UK tax year as the ISA allowance, running from 6 April to 5 April, though unlike the ISA allowance, unused pension allowance can be carried forward for up to three years rather than being lost immediately.
Does carry forward apply automatically, or does it need to be claimed?
There's no separate formal "claim" in the way there is for higher rate pension tax relief — using carry forward simply means making a larger contribution than the current year's standalone allowance would permit, and reporting the relevant figures accurately if requested by HMRC or via Self Assessment. Keeping clear records of contributions and allowances from previous years is important in case queries arise.
Can carry forward be used to exceed the pension annual allowance in retirement, after starting drawdown?
Once the Money Purchase Annual Allowance applies, carry forward generally cannot be used to top defined contribution savings back up above that reduced limit, since the MPAA specifically overrides the standard allowance (and any carried-forward amount) for money purchase contributions from that point onward. This is a further reason to think carefully before accessing taxable pension income earlier than strictly necessary, if continuing to contribute significantly is part of the plan.
Key takeaways
- The standard pension annual allowance is £60,000 for 2025/26, or 100% of relevant UK earnings if lower.
- Non-earners, including children, can still contribute up to £3,600 gross a year and receive basic rate relief.
- High earners may have a tapered, lower annual allowance — check current HMRC thresholds if this might apply.
- Carry forward allows unused allowance from the previous three tax years to be added to the current year's allowance, subject to conditions.
- Contributions exceeding the available allowance can trigger an annual allowance charge, clawing back tax relief.
- Always check current HMRC figures, as annual allowance amounts, taper thresholds, and carry forward rules can change.