£100,000 vs £120,000 After Tax 2025-26
Side-by-side UK take-home pay comparison · Income Tax + National Insurance
You keep £7,357 more per year
Earning £120,000 instead of £100,000 gives you £613 more per month (£141/week). Of the £20,000 gross difference, you keep 37% after tax and NI.
£100,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £7,540 |
| Higher Rate (40%) | £19,892 |
| Total Income Tax | £27,432 |
£120,000 — Income Tax bands
| Band | Tax |
|---|---|
| Personal Allowance | — |
| Basic Rate (20%) | £7,540 |
| Higher Rate (40%) | £29,948 |
| Additional Rate (45%) | £2,187 |
| Total Income Tax | £39,675 |
Full breakdown — £100,000 vs £120,000
| £100,000 | £120,000 | Difference | |
|---|---|---|---|
| Gross salary | £100,000 | £120,000 | +£20,000 |
| Income Tax | £27,432 | £39,675 | +£12,243 |
| National Insurance | £4,011 | £4,411 | +£400 |
| Total deductions | £31,443 | £44,086 | +£12,643 |
| Net pay (annual) | £68,557 | £75,914 | +£7,357 |
| Net monthly | £5,713 | £6,326 | +£613 |
| Net weekly | £1,318 | £1,460 | +£141 |
| Net daily | £264 | £292 | +£28 |
| Effective tax rate | 31.44% | 36.74% | |
| Marginal tax rate | 42% | 62% |
£100,000 vs £120,000 after tax — what you actually keep
On a £100,000 salary, you take home £68,557 per year (£5,713/month). On £120,000, you take home £75,914 per year (£6,326/month). The £20,000 gross difference translates to £7,357 extra take-home — you keep 37% of the raise.
Income Tax on £100,000 is £27,432, rising to £39,675 on £120,000. National Insurance increases from £4,011 to £4,411. Together these deductions mean HMRC takes £12,643 of the £20,000 difference.
Why the effective rate changes
At £100,000 the effective tax rate is 31.44%, while at £120,000 it rises to 36.74%. This is because additional earnings are taxed at the marginal rate (62% on £120,000), 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 £120,000 vs £100,000?
On £120,000 you take home £75,914/year (£6,326/month), compared to £68,557/year (£5,713/month) on £100,000. That is £7,357 more per year, or £613 more per month.
Why is the net difference (£7,357) less than the gross difference (£20,000)?
Of the £20,000 gross difference, you keep £7,357 (37%) after Income Tax and National Insurance. The rest goes to HMRC. Your marginal rate on £100,000 is 42% and on £120,000 it is 62%.
What is the effective tax rate on £100,000 vs £120,000?
The effective tax rate (Income Tax + NI as a percentage of gross) is 31.44% on £100,000 and 36.74% on £120,000. 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 £100,000 vs £120,000?
On £100,000: Income Tax £27,432 + NI £4,011 = £31,443 total deductions. On £120,000: Income Tax £39,675 + NI £4,411 = £44,086 total deductions.