Tax on a Pension Lump Sum: Why You Were Taxed So Much and How to Get It Back

Why Was My Pension Lump Sum Taxed So Heavily?

HMRC applies an emergency tax code, usually 1257L on a Month 1 basis, the first time your provider pays out a taxable pension withdrawal. This code assumes you will receive the same amount every month for the rest of the tax year, which often results in far more tax being deducted than you actually owe.

Under a Month 1 code, your provider gives you only one-twelfth of your Personal Allowance and one-twelfth of each tax band against that single payment, rather than the full annual figure. For the 2026/27 tax year, the standard Personal Allowance is £12,570, the basic rate band runs to £50,270, and the higher rate band runs to £125,140. If your withdrawal, multiplied by twelve, appears to cross these thresholds, part of it is taxed at 40% or 45%, even if you owe little or no tax once your actual income for the year is assessed.

This treatment is a routine part of PAYE, not a pension-specific penalty. Your provider has no current tax code for you on file until HMRC issues one, which usually happens once your first payment has been reported.

This article covers tax on the taxable part of a withdrawal. Up to 25% of most pension pots can be taken completely tax-free, subject to a Lump Sum Allowance of £268,275 across all your pensions combined. See how much of your pension you can take tax-free for a full explanation of that separate limit.

Why Was I Taxed 45% on My Pension Lump Sum?

You are very likely taxed at 45% because the emergency tax code annualises your withdrawal, not because you are an additional-rate taxpayer. A single large payment, multiplied by twelve months, can appear to place you well above the £125,140 additional-rate threshold, even when your total income for the year is far lower.

For example, suppose you take a one-off £40,000 taxable withdrawal in June, with no other income that tax year. Your provider’s Month 1 calculation treats £40,000 as though it will recur every month, an apparent annual income of £480,000. Part of that figure falls above £125,140, so part of the withdrawal is taxed at 45%, and further portions at 40% and 20%.

Because this is her only income for the year in this example, the real liability sits entirely within the basic rate band, well below what the emergency code deducted. These figures are illustrative and depend on your own circumstances and income for the year.

Can Emergency Tax Be Avoided on a First Withdrawal?

Generally not on the very first flexible withdrawal from a new provider, since no tax code is yet held for you. A small trial withdrawal taken first can sometimes establish a code with HMRC before a larger sum is withdrawn, though this adds a delay before you receive the full amount.

This section covers the tax treatment only. Decisions about how and when to access your pension, including whether to phase withdrawals, are pension advice rather than tax advice. Speak to an FCA-regulated financial adviser about the withdrawal strategy itself, and to an accountant about the tax position once you have withdrawn.

The Three HMRC Forms for Reclaiming Emergency Tax on a Pension Lump Sum

Which form applies depends on whether you emptied your pension pot and whether you have other income in the same tax year.

P55 Form: When to Use It

Use form P55 if you have flexibly accessed your pension pot without emptying it, you will not take further regular or flexible payments before the end of the tax year, and your pension provider cannot make the refund itself.

P53Z Form: When to Use It

Use form P53Z if you have flexibly accessed the whole of your pension, or received a serious ill-health lump sum, and you still have other income or a P45 from your pension provider to declare.

P50Z Form: When to Use It

Use form P50Z if you have flexibly accessed and emptied your whole pension pot, stopped work with no plan to return, and hold a P45 from your pension provider. HMRC asks that this form only be submitted once four weeks have passed since you stopped work or finished the pension.

Is P53 the Same as P53Z?

No. P53 is a separate form for a small pension taken entirely as a lump sum under trivial commutation, not for a pension that has been flexibly accessed. Several online guides use P53 and P53Z interchangeably, which can lead to the wrong form being submitted and a delayed claim.

How to Claim Back Overpaid Tax on a Pension Lump Sum

1. Identify which of the three forms above matches your situation.
2. Sign in to GOV.UK and complete the relevant form online, or use the interactive guidance to fill it in and post it, or download and post the paper version.
3. Provide your National Insurance number, pension provider details, parts 2 and 3 of your P45 where relevant, and an estimate of your income for the tax year.
4. Submit the claim. HMRC will check the figures again at the end of the tax year and contact you if the final position differs.

If you complete a Self Assessment return, you do not use these estimated figures within your return unless you specifically want them included in your repayment calculation. Any refund you receive still needs to be reported on your next Self Assessment return, and any balancing payments or payments on account remain due when scheduled.

How Long Does a Pension Tax Refund Take?

HMRC does not publish a fixed number of days for P55 or P53Z claims. Its published guidance for P50Z states a reply may take around 14 days. HMRC’s own online checker, updated weekly, gives the most accurate current estimate for any of the three forms, so it is worth checking directly rather than relying on a fixed timescale.

What Happens If You Do Not Reclaim It Yourself?

If you take no action, HMRC usually corrects the overpayment automatically once it reviews the tax year after it ends on 5 April, refunding any balance owed. This reconciliation can take several months longer than submitting one of the three forms directly, so an active claim is the faster route if you need the money sooner.

How Tax Care Can Help

Working out which form applies, and what figures to declare, becomes more complicated if you have other pensions, employment income, or self-employment profits in the same tax year. Tax Care can check your position, confirm the right form, and prepare the claim on your behalf. If you are also thinking about how pensions fit into your wider estate, see how pensions are treated for inheritance tax for a related explanation.