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UK Personal Allowance 2024/25: What It Is and How It Works

🕑 3 min read  ·  FinCalcHub Editorial

2024/25 UK Income Tax Bands

The £100,000 Trap: Personal Allowance Taper

Once your income exceeds £100,000, you lose £1 of Personal Allowance for every £2 earned above that threshold:

• At £100,000: full £12,570 allowance
• At £112,570: allowance reduced to £6,285
• At £125,140: allowance is completely gone

How to Maximise Your Personal Allowance

• Pension contributions — reduce adjusted net income, potentially restoring lost allowance
• Gift Aid donations — extend basic rate band, effectively increasing allowance value
• Marriage Allowance — if your partner earns below £12,570, they can transfer £1,260 of their allowance to you (saving £252/year in tax)
• Salary sacrifice — employer schemes for childcare vouchers, cycle-to-work, EV cars reduce taxable income

Personal Allowance on Your Tax Code

HMRC communicates your Personal Allowance through your tax code — usually 1257L for the standard allowance. If your tax code is different, check your HMRC Personal Tax Account at gov.uk — you may have unpaid tax from a prior year being collected, or untaxed income from other sources adjusting your code.

Scotland: Different Rates Apply

Scottish taxpayers pay different rates above the Personal Allowance. Scotland has 6 bands (starter rate 19%, basic 20%, intermediate 21%, higher 42%, advanced 45%, top 48%). The Personal Allowance itself (£12,570) is the same across the whole UK.

Worked Example: £55,000 Salary in England

A salary of £55,000 sits just over the higher-rate threshold of £50,270, so the calculation crosses two bands. The first £12,570 is covered by the Personal Allowance and taxed at 0%. The next chunk from £12,571 to £50,270 — that is £37,700 — is taxed at the basic rate of 20%, producing £7,540 in income tax. The remaining £4,730 of earnings between £50,271 and £55,000 falls into the higher-rate band at 40%, adding another £1,892.

Total income tax comes to £9,432 for the year, before National Insurance. On top of that, employee NI for 2025/26 is 8% on earnings between £12,570 and £50,270 (£3,016) plus 2% on earnings above £50,270 (£94.60), giving a combined tax-plus-NI burden of about £12,542. Net take-home is roughly £42,458 a year, or £3,538 a month. That is the headline number — pension salary sacrifice or workplace pension contributions push it higher because they reduce taxable income.

If the same earner moved to Scotland, the picture would shift. Scottish higher rate (42%) kicks in at £43,662, so more of that £55,000 gets taxed at higher Scottish rates. The Personal Allowance is identical at £12,570, but everything above it follows Holyrood's bands rather than Westminster's. Scottish taxpayers earning between roughly £43,000 and £75,000 generally pay several hundred pounds more income tax per year than their English counterparts on the same salary.

Common Mistakes With the Personal Allowance

• Assuming the allowance is "the first £12,570 of every payslip" — it is the first £12,570 of your total annual income from all sources combined, not a monthly tax-free amount per job. People with two jobs are taxed wrong by default and need HMRC to split their allowance across employers.
• Forgetting that pension contributions count toward the £100,000 taper — adjusted net income is what HMRC uses for the taper, which means net pension contributions reduce the income figure that triggers allowance loss. A bonus that pushes you over £100,000 can often be sheltered via a pension top-up before tax year end.
• Ignoring Marriage Allowance when one partner does not work — if your spouse or civil partner earns under £12,570, they can transfer £1,260 of their unused allowance to you, saving £252 in tax. HMRC will backdate claims up to four years, so a one-off claim can be worth over £1,000.
• Not checking your tax code after a pay rise or job change — HMRC sometimes adjusts codes mid-year if it thinks you owe tax from a previous year. A code like 1257L M1 (the "M1" suffix means month-1 basis) usually signals an emergency code that needs correcting via your Personal Tax Account.
• Treating dividend and savings allowances as part of the Personal Allowance — the £500 dividend allowance and the £1,000 personal savings allowance for basic-rate taxpayers are separate from the £12,570 main allowance. They sit on top, not inside, the standard PA.

FAQ

Does the Personal Allowance change if I work part of the year? No — the full £12,570 is available regardless of whether you worked 12 months or 3. HMRC operates a cumulative tax code by default, so a tax refund typically arrives in your final paycheque of the year if you stop work mid-year and your employer is using a non-emergency code.

Do pensioners get the Personal Allowance? Yes. State Pension counts as taxable income but is paid gross, so HMRC uses your tax code to recover any tax due via PAYE on other pensions or earnings. With the new State Pension at roughly £11,975 for 2025/26, most pensioners with no other income pay no tax.

Is the Personal Allowance frozen? Yes. The £12,570 figure has been frozen since 2021/22 and is currently set to remain at that level until April 2028 under the policy known as "fiscal drag." Each year of wage growth pulls more people into tax without rates changing.

Can self-employed people claim the Personal Allowance? Yes. Sole traders deduct the £12,570 from their taxable profits before any income tax applies. National Insurance Class 2 and Class 4 use different thresholds, but the income tax PA itself is the same as for employees.

Sources and Methodology

The bands, thresholds, and taper rules in this guide come directly from HMRC's published rates and allowances for 2025/26 at gov.uk, the Scottish Government's Budget documents for Scottish income tax bands, and the Office for Budget Responsibility (OBR) Economic and Fiscal Outlook for confirmation of the freeze extension to 2028. Marriage Allowance and Gift Aid figures track HMRC's current guidance. Worked examples use the published bands without rounding intermediate steps so the figures match what an HMRC tax calculator returns to the nearest pound.

Actionable Next Steps

1. Sign in to your HMRC Personal Tax Account at gov.uk and check that your current tax code is 1257L (or the correct Scottish/Welsh equivalent).
2. If you earn between £100,000 and £125,140, calculate how much of your bonus or salary you could divert into a pension to bring adjusted net income below £100,000.
3. If your partner earns under £12,570, apply for Marriage Allowance via the HMRC website — the application takes about ten minutes.
4. Check whether you have any untaxed savings interest above £1,000 (basic rate) or £500 (higher rate) that needs declaring.
5. Use our Take-Home Pay Calculator with both your current and projected salaries to see the marginal impact of a pay rise after tax and NI.
6. Diarise the end of the tax year (5 April) and review Gift Aid receipts and pension contributions before the deadline.

Why the Personal Allowance freeze matters

The Personal Allowance has been frozen at £12,570 since April 2021 and is currently scheduled to remain frozen until April 2028 — a seven-year freeze the Institute for Fiscal Studies estimates pulls roughly 4 million additional taxpayers into the tax system through "fiscal drag" alone. In practical terms: every year your salary rises with inflation but the allowance does not, more of your real income becomes taxable, and the effective tax rate creeps up even though the headline 20/40/45 percent bands are unchanged. For higher-earning households the taper at £100,000 compounds this — the £1-of-allowance-lost-per-£2-of-income-over-£100k rule creates the well-known 60 percent marginal-rate band between £100,000 and £125,140. Anyone planning to cross £100k of total income (salary + dividends + savings interest above PSA) should weigh pension contributions specifically to keep adjusted net income below the threshold and preserve the full allowance.