Pension Emergency Tax Calculator

What this calculator does

When you take money flexibly from a defined contribution pension – for example a one-off lump sum or an uncrystallised funds pension lump sum (UFPLS) – your pension provider almost always taxes it using an emergency tax code on a “Month 1” basis. HMRC treats your single withdrawal as if you will receive the same amount every month for the rest of the year, so it gives you only one-twelfth of your tax bands. The result is that most people are taxed far too much on their first pension withdrawal – HMRC has repaid over £1 billion in over-deducted pension tax since the pension freedoms began.

This calculator is for anyone aged 55+ taking cash from a personal, workplace or SIPP pension for the first time, or anyone planning a withdrawal who wants to know the real net amount. Enter your gross withdrawal, the tax-free portion (usually 25%), and any other income, and it shows the emergency tax deducted now, your true full-year liability, the amount you can reclaim, and the correct HMRC reclaim form (P55, P50Z or P53Z).

How it works

The calculation uses the verified 2026/27 figures for England, Wales and Northern Ireland:

• 25% tax-free: Up to 25% of each withdrawal is normally tax-free (capped by the £268,275 lump sum allowance). The other 75% is taxable.
• Emergency Month 1 tax: The taxable part is taxed as if it were 1/12 of an annual income, using one-twelfth of each band – £1,047.50 of tax-free Personal Allowance, then 20% on the next £3,141.67, 40% on the next £6,239.17 and 45% above that.
• True tax: Your actual liability is worked out over the full tax year using the standard bands (Personal Allowance £12,570; 20% to £50,270; 40% to £125,140; 45% above), stacked on top of your other income.
• Reclaim: The difference between the emergency tax and your true tax is what you can claim back.

Worked example

Suppose you withdraw £40,000 from your pension, take the standard 25% tax-free, and have no other income this year:

• Tax-free portion: 25% × £40,000 = £10,000
• Taxable portion: £30,000
• Emergency Month 1 tax: 0% on £1,047.50, 20% on £3,141.67 (£628.33), 40% on £6,239.17 (£2,495.67), 45% on the remaining £19,571.66 (£8,807.25) = £11,931.25
• True tax for the year on £30,000: 20% on £17,430 (£3,486) = £3,486.00
• Reclaimable: £11,931.25 − £3,486.00 = £8,445.25

Because this only takes part of the pot and there is no regular payment, you would reclaim using form P55.

Frequently asked questions

Why is so much tax taken from my first pension withdrawal?

Pension providers must use an emergency tax code on a Month 1 basis for the first flexible withdrawal because they have no up-to-date tax code from HMRC. HMRC assumes you will repeat the withdrawal every month, so only one-twelfth of your allowances and bands are applied, pushing much of the payment into higher tax bands.

Which form do I use to claim the tax back – P55, P50Z or P53Z?

Use P55 if you have taken only part of your pot and are not taking regular payments. Use P50Z if you have emptied your whole pot and have no other taxable income this year. Use P53Z if you have emptied your whole pot but do have other taxable income. The calculator tells you which one applies.

How long does it take to get the refund?

If you submit a P55, P50Z or P53Z claim, HMRC usually refunds the overpaid tax within about 30 days. If you do nothing, HMRC will automatically reconcile your tax after the end of the tax year, but you may wait several months for the money.

Is the 25% tax-free part affected by emergency tax?

No. The tax-free portion (up to 25% of the withdrawal, capped by the £268,275 lump sum allowance) is paid free of Income Tax. Emergency tax only applies to the remaining taxable 75%.

Source: GOV.UK – Income Tax rates and allowances 2026/27 and HMRC guidance on claiming back tax on flexibly accessed pension overpayments (forms P55, P50Z and P53Z).

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