Pro rata by salary · 2026
£42,000 pro rata: what you earn part time
£42,000 full time (37.5 hours) is £21.54 an hour. On 25 hours a week that is £28,000 a year, £2,333 a month, £538 a week.
All figures are gross pay, before Income Tax and National Insurance. Different hours or days? Use the tables below, or put your own numbers into the pro rata pay calculator.
£42,000 pro rata by hours per week
Full-time week of 37.5 hours. Each row is £42,000 × your hours ÷ 37.5, rounded to the nearest pound.
| Your hours | Per year | Per month | Per week |
|---|---|---|---|
| 8 hours | £8,960 | £747 | £172 |
| 10 hours | £11,200 | £933 | £215 |
| 12 hours | £13,440 | £1,120 | £258 |
| 15 hours | £16,800 | £1,400 | £323 |
| 16 hours | £17,920 | £1,493 | £345 |
| 20 hours | £22,400 | £1,867 | £431 |
| 22.5 hours | £25,200 | £2,100 | £485 |
| 24 hours | £26,880 | £2,240 | £517 |
| 25 hours | £28,000 | £2,333 | £538 |
| 28 hours | £31,360 | £2,613 | £603 |
| 30 hours | £33,600 | £2,800 | £646 |
| 32 hours | £35,840 | £2,987 | £689 |
| 35 hours | £39,200 | £3,267 | £754 |
£42,000 pro rata by days per week
Full-time week of 5 days. Each row is £42,000 × your days ÷ 5.
| Your days | Per year | Per month | Per week |
|---|---|---|---|
| 1 day | £8,400 | £700 | £162 |
| 2 days | £16,800 | £1,400 | £323 |
| 3 days | £25,200 | £2,100 | £485 |
| 4 days | £33,600 | £2,800 | £646 |
If full time is 40 or 35 hours
The full-time week changes the hourly rate and every pro rata figure. Check the job advert or contract. The same £42,000 at three common full-time weeks:
How this is worked out
pro rata salary = £42,000 × your hours ÷ full-time hours
Example: £42,000 × 25 ÷ 37.5 = £28,000.00 a year. Monthly is that ÷ 12, weekly is ÷ 52. The hourly rate is £42,000 ÷ 52 ÷ 37.5 = £21.54.
Holiday follows the same fraction. Part-time staff get the same 5.6 weeks of statutory leave, measured in their own working days: 3 days a week gives 5.6 × 3 = 16.799999999999997 days. The holiday entitlement calculator gives your exact figure.
Whatever the sum says, the hourly rate must not fall below the National Minimum Wage for your age (£12.71 for 21 and over from 1 April 2026). Current rates are on gov.uk.
£42,000 pro rata: common questions
Is £42,000 pro rata the same as £42,000 a year?
No. "£42,000 pro rata" means £42,000 is the full-time salary and you get the share that matches your hours. On 25 hours against a 37.5-hour week you would earn £28,000 a year, not £42,000. You only get the full £42,000 if you work the full-time hours.
How much is £42,000 pro rata for 3 days a week?
£42,000 × 3 ÷ 5 = £25,200 a year. That is £2,100 a month or £485 a week before tax, assuming full time is 5 days.
Does pro rata pay change my hourly rate?
No. The hourly rate stays the same and only the number of paid hours changes. £42,000 for a 37.5-hour week is £21.54 an hour whether you work 37.5 hours or 20. Paying part-time staff a lower hourly rate for the same job may be unlawful less favourable treatment.
You might also need
Pro rata pay calculator
Any salary, any hours or days per week: annual, monthly, weekly and hourly figures.
Pro rata by salary
Ready-made part-time pay tables for every full-time salary from £15,000 to £80,000.
Holiday entitlement calculator
Statutory leave for part-time, irregular hours and mid-year starters.
Holiday entitlement when leaving a job
Untaken leave you must be paid for in your final pay.
What does pro rata mean?
Job adverts, worked examples and where the in-proportion rule applies.
Zero-hours contract holiday
The 12.07% accrual method, rolled-up holiday pay and the 52-week average.
Sources
- gov.uk: National Minimum Wage and National Living Wage rates
- gov.uk: Holiday entitlement (5.6 weeks, 28 day cap)
Figures checked on 3 September 2026. Statutory minimums only: your contract can give more, never less.