£42 an hour is how much a year in the UK?
- Income tax£20,19224.7%
- National Insurance£3,6494.5%
- Take-home pay£58,05970.9%
At the UK full-time pattern of 37.5 hours and 52 weeks, £42 an hour is £81,900 a year. Income tax and National Insurance take £23,841, leaving £58,059 — £4,838 a month. Pay the statutory 5% workplace pension and the net becomes £56,739, £1,321 less, because the pension comes out before income tax.
The same £42 an hour at different weekly hours
Part-time hourly work is not a scaled-down version of full-time work. Each row below is recalculated on its own annual figure, so the tax bill is lower than a straight percentage — at 16 hours a week the personal allowance of £12,570 may wipe income tax out entirely.
| Weekly hours | Hours a year | Annual gross | Income tax | National Insurance | Take-home | Monthly |
|---|---|---|---|---|---|---|
| 16 hours | 832 | £34,944 | −£4,475 | −£1,790 | £28,679 | £2,390 |
| 20 hours | 1,040 | £43,680 | −£6,222 | −£2,489 | £34,969 | £2,914 |
| 25 hours | 1,300 | £54,600 | −£9,272 | −£3,103 | £42,225 | £3,519 |
| 30 hours | 1,560 | £65,520 | −£13,640 | −£3,321 | £48,559 | £4,047 |
| 35 hours | 1,820 | £76,440 | −£18,008 | −£3,539 | £54,893 | £4,574 |
| 37.5 hours | 1,950 | £81,900 | −£20,192 | −£3,649 | £58,059 | £4,838 |
| 40 hours | 2,080 | £87,360 | −£22,376 | −£3,758 | £61,226 | £5,102 |
| 45 hours | 2,340 | £98,280 | −£26,744 | −£3,976 | £67,560 | £5,630 |
| 48 hours | 2,496 | £104,832 | −£30,331 | −£4,107 | £70,394 | £5,866 |
What the workplace pension changes at £42 an hour
Pension contributions work under a net pay arrangement, so they reduce taxable pay but leave National Insurance untouched. At this rate the pension only applies to earnings between £6,240 and £50,270, which is why 8% does not cost 8% of the whole salary.
| Employee contribution | Pension paid | Income tax | National Insurance | Annual take-home | Monthly |
|---|---|---|---|---|---|
| None | — | −£20,192 | −£3,649 | £58,059 | £4,838 |
| 5% | −£2,202 | −£19,311 | −£3,649 | £56,739 | £4,728 |
| 8% | −£3,522 | −£18,783 | −£3,649 | £55,946 | £4,662 |
The employer adds at least 3% on top of your own contribution — money that never appears in these take-home figures because it goes straight into the pension pot.
Student loan at £42 an hour
Repayment is 9% of everything above your plan's threshold (6% for the postgraduate loan), taken from pay rather than from the annual total in one go. At £81,900 a year:
| Plan | Threshold | Rate | Repayment a year | Per month |
|---|---|---|---|---|
| Plan 1 | £26,900 | 9% | −£4,950 | −£413 |
| Plan 2 | £29,385 | 9% | −£4,726 | −£394 |
| Plan 4 | £33,795 | 9% | −£4,329 | −£361 |
| Plan 5 | £25,000 | 9% | −£5,121 | −£427 |
| Postgraduate loan | £21,000 | 6% | −£3,654 | −£305 |
5 plans apply at this rate; a borrower is only on one of them, so use the line that matches your loan.
£42 an hour in England versus Scotland
National Insurance and the personal allowance are identical across the UK; only the income tax bands differ. At £81,900 the gap is £2,395 a year, and it grows quickly above £43,663 where Scotland's higher rate starts.
| Where you work | Income tax | National Insurance | Annual take-home | Difference |
|---|---|---|---|---|
| England, Wales & Northern Ireland | −£20,192 | −£3,649 | £58,059 | — |
| Scotland | −£22,587 | −£3,649 | £55,664 | £2,395 |
What 7.5 extra hours a week are worth at £42
A 45-hour week at the same rate adds £16,380 of gross pay a year (£1,365 a month) and £9,500 of take-home (£792 a month). The gap between those two numbers is the marginal rate on the extra hours: 42.0% goes to tax and National Insurance. Note that this is the same rate as normal pay — UK overtime is not taxed at a special rate, it simply adds to the annual total.
If your contract pays overtime at 1.5× after 37.5 hours, the extra hours are worth half again as much gross, and roughly £4,750 more in the hand.
Nearby hourly rates
Is £42 an hour a good wage in the UK?
It is £81,900 a year before tax and £4,838 a month after tax and National Insurance without a pension. Whether that is comfortable depends on housing, region and household size, which this page cannot know — but the effective deduction rate here is 29.1%, so the gross-to-net gap is the part you can plan around.
How many hours is that a month?
37.5 hours a week averages 163 hours a month — a little over 162. Monthly pay is annual pay divided by 12, not four weeks of pay, which is why a month never equals 4 × a weekly figure.
Why does the tax line jump between neighbouring rates?
Because income tax is banded, not flat. Crossing £100,000 starts the personal allowance taper and creates an effective 60% band until £125,140; National Insurance drops from 8% to 2% at £50,270. Hourly rates either side of those points behave differently even when the pay difference is small.