£18,000 vs £33,000 After Tax 2025-26
Side-by-side UK take-home pay comparison · Income Tax + National Insurance
You keep £10,800 more per year
Earning £33,000 instead of £18,000 gives you £900 more per month (£208/week). Of the £15,000 gross difference, you keep 72% after tax and NI.
£18,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £1,086 |
| Total Income Tax | £1,086 |
£33,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £4,086 |
| Total Income Tax | £4,086 |
Full breakdown — £18,000 vs £33,000
| £18,000 | £33,000 | Difference | |
|---|---|---|---|
| Gross salary | £18,000 | £33,000 | +£15,000 |
| Income Tax | £1,086 | £4,086 | +£3,000 |
| National Insurance | £434 | £1,634 | +£1,200 |
| Total deductions | £1,520 | £5,720 | +£4,200 |
| Net pay (annual) | £16,480 | £27,280 | +£10,800 |
| Net monthly | £1,373 | £2,273 | +£900 |
| Net weekly | £317 | £525 | +£208 |
| Net daily | £63 | £105 | +£42 |
| Effective tax rate | 8.44% | 17.33% | |
| Marginal tax rate | 28% | 28% |
£18,000 vs £33,000 after tax — what you actually keep
On a £18,000 salary, you take home £16,480 per year (£1,373/month). On £33,000, you take home £27,280 per year (£2,273/month). The £15,000 gross difference translates to £10,800 extra take-home — you keep 72% of the raise.
Income Tax on £18,000 is £1,086, rising to £4,086 on £33,000. National Insurance increases from £434 to £1,634. Together these deductions mean HMRC takes £4,200 of the £15,000 difference.
Why the effective rate changes
At £18,000 the effective tax rate is 8.44%, while at £33,000 it rises to 17.33%. This is because additional earnings are taxed at the marginal rate (28% on £33,000), which is higher than the blended average. The more you earn, the greater the proportion taken in tax and NI.
Frequently asked questions
How much more do I take home on £33,000 vs £18,000?
On £33,000 you take home £27,280/year (£2,273/month), compared to £16,480/year (£1,373/month) on £18,000. That is £10,800 more per year, or £900 more per month.
Why is the net difference (£10,800) less than the gross difference (£15,000)?
Of the £15,000 gross difference, you keep £10,800 (72%) after Income Tax and National Insurance. The rest goes to HMRC. Your marginal rate on £18,000 is 28% and on £33,000 it is 28%.
What is the effective tax rate on £18,000 vs £33,000?
The effective tax rate (Income Tax + NI as a percentage of gross) is 8.44% on £18,000 and 17.33% on £33,000. The higher salary has a higher effective rate because more income falls into higher tax bands.
How much tax and NI do I pay on £18,000 vs £33,000?
On £18,000: Income Tax £1,086 + NI £434 = £1,520 total deductions. On £33,000: Income Tax £4,086 + NI £1,634 = £5,720 total deductions.