How Much Tax if I Withdraw My Whole Pension? (UK)

Taking your entire pension as a single lump sum typically triggers a substantial tax bill. The first 25% is tax-free up to the Lump Sum Allowance (£268,275 for 2026/27). The remaining 75% is taxed as income in the tax year you draw it — and the lump pushed onto your existing income often pushes you into higher and additional rate bands. For a £300,000 pension drawn in full by someone with no other income, the tax bill is roughly £58,000 — leaving net £242,000 from a £300,000 pot.

This is the worked maths, plus the alternative strategies that usually cost less tax.

Why withdrawing it all at once costs so much

UK income tax bands work cumulatively. Taking £300,000 in one tax year means HMRC treats that £300,000 (minus the 25% tax-free element) as taxable income alongside any other earnings in the same year.

For 2026/27 (England, Wales, Northern Ireland):

• Personal allowance: £12,570 (tapered above £100,000).
• Basic rate (20%): £12,570 to £50,270.
• Higher rate (40%): £50,270 to £125,140.
• Additional rate (45%): above £125,140.

A large taxable lump-sum withdrawal exhausts the personal allowance, fills the basic-rate band, fills the higher-rate band, and lands material amounts in the additional-rate band. The effective tax rate on the taxable portion can be 35–45% depending on the pension size and any other income.

The technical detail is in HMRC: tax on your pension income.

The worked maths: £300,000 pension, single tax year

Assume you have no other income in the tax year. You withdraw the full £300,000 in one go.

Tax-free portion (25%): £75,000. No tax.

Taxable portion (75%): £225,000.

Tax on £225,000 (assuming no other income):

• Personal allowance: tapered to £0 (income above £125,140 fully tapers PA).
• £0–£37,700: 20% → £7,540.
• £37,700–£112,570: 40% → £29,948.
• £112,570–£225,000: 45% → £50,594.
• Total tax: ~£88,000.

Net received from withdrawal: £75,000 tax-free + £225,000 − £88,000 = £75,000 + £137,000 = £212,000.

You started with £300,000 in the pension. You end with £212,000 in your bank account. Effective tax rate: 29.3% of the gross pension value.

If you also have £40,000 of salary income in the same year, the maths gets worse — the £225,000 stacks on top, pushing more into the 45% band. Total tax could approach £100,000.

The same £300,000 spread over 10 years

Now compare: take £30,000 per year over 10 years, with no other income.

Each year:

• 25% tax-free element: £7,500.
• 75% taxable: £22,500.
• Personal allowance: £12,570.
• Taxable income above PA: £22,500 − £12,570 = £9,930.
• £9,930 × 20% = £1,986 tax.
• Net annual: £30,000 − £1,986 = £28,014.

10-year total:

• Gross: £300,000.
• Tax: £19,860.
• Net: £280,140.

Effective tax rate: 6.6%.

The same pot delivers £68,000 more in net income just by spreading the withdrawals. The pension wrapper’s structure massively rewards staged withdrawals over single lump sums.

Why the difference is so big

Three factors compound:

1. Personal allowance used each year

In the spread approach, you use £12,570 of personal allowance every year — tax-free income that’s wasted in a one-off withdrawal.

2. Basic-rate band used each year

Each year you can take up to £37,700 of taxable income at 20% (after PA). In a single-year withdrawal, only the first £37,700 of taxable income gets the 20% rate — everything else moves up.

3. Investment growth continues on unsold pot

Money left in the pension continues to grow tax-free. The spread approach gives the remaining pot 1–9 years of further growth, sometimes adding tens of thousands in real terms.

What about emergency tax codes?

A practical wrinkle. The first lump-sum withdrawal often gets taxed under an emergency tax code (Month 1 basis):

• HMRC treats the withdrawal as if it were one-twelfth of your annual income.
• For a £100,000 lump sum, HMRC initially calculates tax as if you earn £1.2 million a year.
• Resulting overpayment can be £30,000+ on a £100,000 withdrawal.

You reclaim the overpaid tax via HMRC’s P55, P50Z or P53Z forms after the withdrawal. Most providers warn about this; some delay first withdrawal to align with the right tax code if you ask.

The overpayment is fully refundable but creates cashflow disruption. Plan around it.

Could I take it all and put it elsewhere?

A common impulse: take the pension, put it in a savings account or ISA. The maths almost always argues against this:

• In the pension: tax-free growth on the whole amount.
• Outside the pension: taxable growth above the PSA, dividend allowance and CGT AEA.

Plus the immediate tax hit on the withdrawal itself, which the alternative doesn’t suffer.

There are narrow scenarios where withdrawing makes sense:

• You have a terminal medical diagnosis. Tax planning becomes urgent.
• You need the money for a specific time-sensitive purpose (e.g. emergency healthcare, debt at extreme rates).
• You’re emigrating to a country where future UK pension withdrawals will be taxed worse.

For ordinary retirement planning, staged withdrawal is almost always better.

Worked example: £500,000 pension, big purchase needed

Sandra, 60, has a £500,000 pension and wants to buy a £350,000 holiday home outright (cash purchase).

Option A: Withdraw the entire pension to fund the purchase.

• Tax-free: £125,000 (25%).
• Taxable: £375,000.
• Tax (no other income): £125,000+ (45% band heavy).
• Net to spend: £375,000.
• After buying the £350,000 home: £25,000 left, vs £500,000 starting position. £475,000 lost (mostly to tax).

Option B: Take 25% lump sum + mortgage on the holiday home.

• Tax-free lump: £125,000.
• Buy the £350,000 home: £125,000 deposit + £225,000 mortgage.
• £375,000 remains in pension, continues tax-free growth.
• Mortgage interest costs over 15 years: ~£75,000.
• Net cost: ~£75,000 of interest, vs ~£100,000+ of tax. Pension keeps growing.

Option C: Drawdown over time + mortgage.

• Tax-free lump: £125,000 for deposit.
• Drawdown ~£40,000/year to cover mortgage payments + living.
• Each year stays within basic rate. Effective rate: ~10%.

Option B or C both significantly beat Option A. Almost no scenario justifies the all-at-once approach unless the timeline is genuinely fixed.

Internal links

• What is the 25 percent tax free pension lump sum?
• Can I take my pension at 55 and still work?
• What happens to my pension when I die?

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This guide is information, not regulated financial advice. Lump-sum pension withdrawals have significant tax consequences that can’t be undone — speak to a regulated pension adviser before drawing large amounts in a single year.