£40,000 vs £42,000 After Tax 2025-26
Side-by-side UK take-home pay comparison · Income Tax + National Insurance
You keep £1,440 more per year
Earning £42,000 instead of £40,000 gives you £120 more per month (£28/week). Of the £2,000 gross difference, you keep 72% after tax and NI.
£40,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £5,486 |
| Total Income Tax | £5,486 |
£42,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £5,886 |
| Total Income Tax | £5,886 |
Full breakdown — £40,000 vs £42,000
| £40,000 | £42,000 | Difference | |
|---|---|---|---|
| Gross salary | £40,000 | £42,000 | +£2,000 |
| Income Tax | £5,486 | £5,886 | +£400 |
| National Insurance | £2,194 | £2,354 | +£160 |
| Total deductions | £7,680 | £8,240 | +£560 |
| Net pay (annual) | £32,320 | £33,760 | +£1,440 |
| Net monthly | £2,693 | £2,813 | +£120 |
| Net weekly | £622 | £649 | +£28 |
| Net daily | £124 | £130 | +£6 |
| Effective tax rate | 19.2% | 19.62% | |
| Marginal tax rate | 28% | 28% |
£40,000 vs £42,000 after tax — what you actually keep
On a £40,000 salary, you take home £32,320 per year (£2,693/month). On £42,000, you take home £33,760 per year (£2,813/month). The £2,000 gross difference translates to £1,440 extra take-home — you keep 72% of the raise.
Income Tax on £40,000 is £5,486, rising to £5,886 on £42,000. National Insurance increases from £2,194 to £2,354. Together these deductions mean HMRC takes £560 of the £2,000 difference.
Why the effective rate changes
At £40,000 the effective tax rate is 19.2%, while at £42,000 it rises to 19.62%. This is because additional earnings are taxed at the marginal rate (28% on £42,000), 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 £42,000 vs £40,000?
On £42,000 you take home £33,760/year (£2,813/month), compared to £32,320/year (£2,693/month) on £40,000. That is £1,440 more per year, or £120 more per month.
Why is the net difference (£1,440) less than the gross difference (£2,000)?
Of the £2,000 gross difference, you keep £1,440 (72%) after Income Tax and National Insurance. The rest goes to HMRC. Your marginal rate on £40,000 is 28% and on £42,000 it is 28%.
What is the effective tax rate on £40,000 vs £42,000?
The effective tax rate (Income Tax + NI as a percentage of gross) is 19.2% on £40,000 and 19.62% on £42,000. 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 £40,000 vs £42,000?
On £40,000: Income Tax £5,486 + NI £2,194 = £7,680 total deductions. On £42,000: Income Tax £5,886 + NI £2,354 = £8,240 total deductions.