The pension Annual Allowance is £60,000 a year. That is the figure in every benefits pack, every provider's FAQ, and every "how much can I put in" article you'll find.

But for a slice of higher earners, it isn't £60,000. It can be as low as £10,000, and the reduction happens automatically. No letter arrives. Your pension scheme often has no idea it applies to you, because it depends on income your scheme never sees.

This is the tapered Annual Allowance, and it sits above the better-known 60% band between £100,000 and £125,140. Different rule, different trigger, different cost. It's entirely possible to be caught by both in the same tax year and only notice one.

The good news is that the taper is reversible more often than people assume. Three years of carry forward can restore real contribution room, and in some cases a single contribution can switch the taper off completely.

It takes two tests, not one

The taper only bites if you fail both of these for 2026/27:

• Threshold income over £200,000. Broadly, your taxable income minus your own pension contributions. Salary given up under a salary sacrifice arrangement set up after 8 July 2015 gets added back in.
• Adjusted income over £260,000. Broadly, your taxable income plus employer pension contributions.

Pass either test and the taper doesn't apply at all, no matter how high the other number is. That single fact is what makes the whole thing plannable.

Note the asymmetry. Your own contributions pull threshold income down. Your employer's contributions push adjusted income up. So a generous employer contribution can be the thing that drags you into the taper, which is a strange feeling when it arrived as a benefit.

How steep the taper gets

Above £260,000 of adjusted income, you lose £1 of allowance for every £2 over. The slide stops at a floor of £10,000, reached once adjusted income hits £360,000.

A bonus, a share vest, or a one-off consultancy payment can move you two rows down this table in a single year. The taper is assessed year by year, so a spike year is a taper year even if the years either side are nowhere near.

Going over isn't a fine. It's a clawback.

Contribute more than your allowance and you face the Annual Allowance charge. The excess gets added to your taxable income for the year and taxed at your marginal rate.

It isn't a penalty, and nobody is punishing you. It simply removes the tax relief you were given on contributions above the limit. At additional rate that means 45% on the excess in England, Wales and Northern Ireland, and rates differ in Scotland.

You report it on your Self Assessment return. In some cases the scheme can settle it from your pot under Scheme Pays, which solves a cash-flow problem but leaves you with a smaller pension.

A worked scenario, line by line

Consider Stephen, 52, in England. Simplified modelled numbers, but every figure checks out against the rules above.

• Taxable income of £280,000 (salary plus bonus)
• His own pension contributions of £20,000 gross, made from taxed income
• Employer contributions of £40,000 into his workplace scheme
• A SIPP (Self-Invested Personal Pension) he's held since 2019, plus the workplace pot

Run the two tests. Threshold income is £280,000 minus his own £20,000, so £260,000. That's over £200,000. Adjusted income is £280,000 plus the employer's £40,000, so £320,000. That's over £260,000. Both tests failed, so the taper applies.

He's £60,000 above the £260,000 line. Halve it, and he loses £30,000 of allowance. His Annual Allowance for 2026/27 is £30,000.

His total contributions this year are £60,000. That's £30,000 over. At 45%, the Annual Allowance charge is £13,500.

Stephen's assumption all year was that he had £60,000 to play with. He had half that.

Where the room was hiding

Carry forward lets you use unused Annual Allowance from the three previous tax years, provided you were a member of a registered pension scheme in each of them. You don't claim it in advance. It applies automatically, current year first, then the oldest year first.

The standard allowance has been £60,000 since 2023/24, so for 2026/27 all three look-back years are £60,000 years, unless you were tapered in one of them. Stephen was, in the year he was promoted.

Note that 2025/26 line. His allowance that year was £50,000, not £60,000, because his adjusted income was £280,000. The unused amount is always measured against that year's allowance, tapered or not. It's an easy carry forward error to make.

Now apply it. His current-year allowance of £30,000 is used first. The £30,000 excess is covered from the oldest year, 2023/24, which had £32,000 sitting unused.

In this modelled scenario, the charge disappears entirely. Nothing about Stephen's contributions changed. Only his record-keeping did.

He's left with £2,000 of 2023/24 room, which expires after this year, plus £26,000 from 2024/25 and £5,000 from 2025/26 still available next year. Carry forward is a rolling three-year window, so unused room falls out of reach one year at a time.

The other lever: switching the taper off

Carry forward gives you more room. Reducing threshold income removes the taper altogether.

Because your own contributions come off threshold income, a contribution large enough to bring it to £200,000 or below means one of the two tests is passed, and the taper doesn't apply for that year. Your full £60,000 comes back even though adjusted income hasn't moved.

For Stephen, threshold income is £260,000. Getting to £200,000 needs another £60,000 of personal contributions, taking his own total to £80,000 and his overall contributions to £120,000. With the taper switched off he'd have £60,000 of current-year allowance plus £63,000 of carry forward, so £123,000 of room. It fits, with £3,000 to spare.

Two honest caveats.

• Tax relief on your own contributions is capped at 100% of your relevant UK earnings for the year. Employer contributions aren't subject to that earnings cap, which is why the mix between the two matters.
• £60,000 of extra cash locked away until at least age 55 (rising to 57 from April 2028) is a serious commitment, and the money is invested, so it can fall as well as rise.

The closer you sit to £200,000 of threshold income, the cheaper this lever is. Someone at £205,000 flips the switch with a £5,000 contribution. Someone at £260,000 is looking at a very different decision. Knowing which one you are is the whole exercise.

One more boundary worth knowing. If you've already flexibly accessed a defined contribution pension, the £10,000 Money Purchase Annual Allowance applies and carry forward can't be used for further DC saving, which I've written about separately.

Why this is hard to do in your head

You're solving for four things at once: this year's two income tests, three years of historic allowances (each of which may itself have been tapered), the contribution that would flip the threshold test, and the earnings cap on your own contributions. Change the bonus and every line moves.

That's exactly the kind of multi-year, multi-variable problem Optiml UK is being built to model. The engine already does this work in Canada across a different tax system, and the UK version is being rebuilt around SIPPs, workplace pensions, ISAs (Individual Savings Accounts) and HMRC rules.

When Optiml launches in the UK, the Minimise Lifetime Taxes strategy will look at contribution decisions across your whole horizon rather than one tax year in isolation, because a contribution that saves you tax today changes what you can draw at 60. Compare Plans will let you put the do-nothing version next to the carry forward version side by side. Unlimited What-If Scenarios will let you test what a bonus of £30,000 versus £80,000 does to your plan before the bonus lands.

Optiml plans. It doesn't recommend specific funds or providers. It shows you your own numbers and what each decision does to them.

The point of all this

The Annual Allowance taper isn't a trap in the sense of something hidden. It's arithmetic, and it's published. It catches people because it depends on two numbers most of us never calculate, in a year that often looks unusual for a reason.

Check both tests before tax-year-end, not after. Keep a record of contributions and allowances for the last three years, because carry forward is worth nothing if you can't evidence it. And remember that the 60% band between £100,000 and £125,140, which I've covered in a separate post, is a different rule with a different fix.

Optiml is coming to the UK, and the waitlist is where the early users get to shape what we build first.

The taper isn't about how much you earn. It's about what you knew in March.