Budgeting From Take-Home, Not Salary
The 50/30/20 rule was written for a different tax system. Here is what actually works on a UK payslip.
The 50/30/20 rule — half on needs, thirty per cent on wants, twenty per cent saved — was written for a different tax system and is usually quoted against gross. Applied to a UK payslip it is either impossible or misleading depending on where you live.
The version that works starts from what actually arrives and treats housing as the variable that everything else bends around, because in most of the UK it is.
What the rule means in pounds
| Salary | Take-home a month | Needs (50%) | Wants (30%) | Saving (20%) |
|---|---|---|---|---|
| £25,000 | £1,793.34 | £896.67 | £538.00 | £358.67 |
| £32,000 | £2,213.34 | £1,106.67 | £664.00 | £442.67 |
| £40,000 | £2,693.34 | £1,346.67 | £808.00 | £538.67 |
| £55,000 | £3,538.17 | £1,769.09 | £1,061.45 | £707.63 |
| £75,000 | £4,504.83 | £2,252.41 | £1,351.45 | £900.97 |
Where it breaks
In London, the 50% needs figure at £40,000 is about £1,346.67, and a one-bedroom flat alone is £950.00 before council tax and bills. The rule does not fail because the rule is wrong; it fails because the housing market is. Sharing, or moving further out, is the variable that makes it work — not spending less on food.
The genuinely useful discipline is to fix the saving figure first and let the wants absorb the variation, rather than the other way round.
Questions people actually ask
Should I budget from gross or net?
How much should I save?
The numbers this sits on
| Salary | Income tax | National Insurance | Take-home | A month | Effective rate |
|---|---|---|---|---|---|
| £25,000 | £2,486 | £994 | £21,520 | £1,793 | 13.9% |
| £35,000 | £4,486 | £1,794 | £28,720 | £2,393 | 17.9% |
| £45,000 | £6,486 | £2,594 | £35,920 | £2,993 | 20.2% |
| £60,000 | £11,432 | £3,210 | £45,358 | £3,780 | 24.4% |
| £85,000 | £21,432 | £3,710 | £59,858 | £4,988 | 29.6% |
| £110,000 | £33,432 | £4,210 | £72,358 | £6,030 | 34.2% |
Every figure in that table is computed from the published 2026/27 rates by the same engine that runs the calculators on this site, so a number in an article and a number in a calculator can never drift apart. National Insurance uses the statutory period thresholds real payroll uses, which is why these figures reconcile with a payslip rather than nearly reconciling with one.
| Salary | England, Wales, NI | Scotland | With a Plan 2 loan | Keep from the next £1,000 |
|---|---|---|---|---|
| £28,000 | 28.0% | 28.0% | 28.0% | £720.00 |
| £40,000 | 28.0% | 29.0% | 37.6% | £720.00 |
| £52,000 | 42.0% | 44.0% | 51.6% | £580.00 |
| £65,000 | 42.0% | 44.0% | 50.4% | £580.00 |
| £105,000 | 62.0% | 69.5% | 70.4% | £380.00 |
| £130,000 | 47.0% | 50.0% | 56.6% | £530.00 |
Work it out for yourself
- Take-home pay calculatorThe main calculator, all four UK nations.
- Pay rise calculatorWhat a raise really adds.
- Salary sacrificeWhat you are trading.
- Tax code checkerWhat each letter and prefix does.
Figures on this page are for the 2026/27 tax year (6 April 2026 to 5 April 2027) and were last checked on 29 August 2026. Every rate we use is listed on the sources page.