Understanding UK income tax bands is fundamental to understanding how much of your salary you actually take home. The UK uses a progressive tax system, meaning different portions of your income are taxed at different rates — not your entire income at a single rate. This article explains how the system works.
How UK income tax bands work
The UK income tax system divides your taxable income into bands, with each band taxed at a different rate. Crucially, only the portion of income within each band is taxed at that band's rate — moving into a higher band does not mean all your income is taxed at the higher rate, only the amount above the threshold.
England, Wales and Northern Ireland share the same income tax bands. Scotland has its own income tax bands and rates, which are generally structured with more bands than the rest of the UK — always check current Scottish rates separately if you live in Scotland.
The current income tax bands (England, Wales, Northern Ireland)
The structure typically works as follows, though exact thresholds are reviewed annually — check gov.uk for current figures:
- Personal Allowance: The first portion of your income — currently £12,570 — is tax-free for most people. See our guide to the Personal Allowance for full details, including how it reduces for high earners.
- Basic rate (20%): Income from £12,571 to £50,270 is taxed at 20%.
- Higher rate (40%): Income from £50,271 to £125,140 is taxed at 40%.
- Additional rate (45%): Income above £125,140 is taxed at 45%.
These figures change with each Budget, so always verify the current thresholds at gov.uk before relying on them for financial decisions.
A worked example
Suppose you earn £45,000 per year. Your tax would be calculated as follows: the first £12,570 is tax-free under your Personal Allowance. The remaining £32,430 (from £12,571 to £45,000) falls within the basic rate band and is taxed at 20%, resulting in tax of £6,486. Your total income tax for the year would be £6,486 — an effective overall tax rate of around 14.4% on your total income, even though your marginal rate (the rate on your last pound earned) is 20%.
This distinction between your marginal rate and your effective rate is important and often misunderstood — many people believe moving into a higher tax band means all their income is taxed at the higher rate, which is not the case.
The Personal Allowance taper for high earners
If your income exceeds £100,000, your Personal Allowance is gradually reduced — you lose £1 of allowance for every £2 you earn above £100,000. This means the Personal Allowance is fully removed once income reaches £125,140, creating an effective marginal tax rate of 60% on income between £100,000 and £125,140 for many taxpayers, due to the combined effect of losing the allowance and paying higher rate tax. This is one of the least well-understood aspects of the UK tax system and is worth being aware of if your income approaches this range.
How is income tax collected?
For most employees, income tax is collected automatically through PAYE (Pay As You Earn) — your employer deducts tax from your salary before paying you, based on your tax code. For self-employed individuals, income tax is calculated and paid through self-assessment, typically with payments due in January and July each year — see our guide to self assessment tax returns for more detail.
What income is taxable?
Most forms of income are subject to income tax, including employment income, self-employment profits, pension income, and most savings interest above your Personal Savings Allowance. Some income is tax-free, including ISA interest and gains, certain state benefits, and the first £1,000 of savings interest for basic rate taxpayers (or £500 for higher rate taxpayers) under the Personal Savings Allowance.
National Insurance is separate
It is worth noting that National Insurance contributions are calculated separately from income tax, using different thresholds and rates. Your overall deduction from gross pay is income tax plus National Insurance combined — see our guide to National Insurance for full details.