Before HMRC takes a penny, several slices of your income are protected. Knowing your allowances is the simplest way to pay no more tax than you owe.
The phrase "tax-free allowance" usually conjures the Personal Allowance, but the UK system actually layers several separate allowances on top of it. Each one shields a different slice of income, and using them all is the difference between paying the right tax and paying too much.
Several allowances run in parallel, each tied to a type of income:
A few further allowances apply in specific circumstances. The Marriage Allowance lets a non-taxpayer transfer £1,260 of their Personal Allowance to a basic-rate spouse, and Blind Person's Allowance adds £3,130 on top of the Personal Allowance for registered blind people. The starting rate for savings can give up to a further £5,000 of tax-free interest to people with low non-savings income. Each allowance attaches to a particular kind of income, so the art of paying the right tax is matching the right income to the right allowance rather than letting any of them go unused.
Consider Sophie, a basic-rate taxpayer for 2025/26 with three income sources:
Her allowances apply like this:
| Income | Amount | Allowance used | Taxable |
|---|---|---|---|
| Employment | £30,000 | £12,570 Personal Allowance | £17,430 |
| Savings interest | £800 | £1,000 Personal Savings Allowance | £0 |
| Dividends | £400 | £500 Dividend Allowance | £0 |
Sophie pays Income Tax only on the £17,430 of employment income above her Personal Allowance (£17,430 × 20% = £3,486). Her savings and dividends fall entirely within their own allowances, so they are completely tax-free. Check the effect of allowances on any salary with the salary calculator.
Allowances are mostly use-it-or-lose-it: an unused Personal Allowance in one year cannot be carried into the next. Some can be transferred, such as the Marriage Allowance, which lets a non-taxpayer pass £1,260 of their Personal Allowance to a basic-rate spouse and can be backdated up to four years. The Personal Allowance also tapers above £100,000, removing £1 for every £2 of income until it is gone at £125,140, which is why high earners often use pension contributions or salary sacrifice to stay below £100,000 and reclaim the allowance in full.
There is also an ordering effect worth understanding. HMRC applies your Personal Allowance to your income in the way that produces the lowest tax, generally setting it against non-savings income first, then savings, then dividends. The savings and dividend allowances then sit on top, each shielding its own slice. This layering is why someone with a modest salary and significant savings or dividends can receive far more tax-free income than the headline £12,570 alone would suggest.
A tax-free allowance you forget to use is simply tax you chose to pay. Every allowance you claim is money kept legitimately out of HMRC's reach.
Sole traders benefit from the same Personal Allowance as everyone else: the first £12,570 of taxable profit is tax-free. On top of that, the £1,000 trading allowance lets very small side incomes go undeclared, and the £1,000 property allowance does the same for minor rental income, which is useful for anyone testing a side hustle before it grows into a full business. From April 2026, sole traders over the Making Tax Digital threshold will report income through quarterly updates, but this changes only how and when they report, not the allowances themselves. The Personal Allowance and any other reliefs are still applied when the annual tax is finalised at the final declaration, so the tax-free slice of profit is fully preserved under the new regime.
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