Pro-Rata Salary Calculator UK: part-time, part-year and term-time pay
Work out part-time pay from a full-time salary, the full-time equivalent of part-time pay, pay for part of a month or year, or term-time pay. Gross pay, before tax.
- Official sources cited
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Your details
Enter a full-time salary and your hours. We work out what you earn for those hours.
The hours a full-time person works in your job, usually in your contract. Often 35, 37.5 or 40.
Your result
Annual pay (gross)
£18,000.00
| Step | Amount |
|---|---|
| Share of full-timeYour hours ÷ full-time hours | 60% |
| Full-time salaryYour full-time salary | £30,000.00 |
| Per yearFull-time salary × share | £18,000.00 |
| Per monthAnnual pay ÷ 12 | £1,500.00 |
| Per weekAnnual pay ÷ 52 | £346.15 |
Based on 22.5 of 37.5 full-time hours a week. Before tax and National Insurance.
How to use this calculator
- Choose what you want to work out: part-time pay, the full-time equivalent of part-time pay, pay for part of a month or year, or term-time pay.
- Enter the full-time salary and the hours (or days, or weeks) you work. The result updates as you type.
- All figures are gross, before income tax and National Insurance. Use the link under the result to see take-home pay.
How pro-rata salary is worked out
"Pro rata" means "in proportion". Your pro-rata pay is the full-time pay multiplied by the share of full-time you work. The share depends on what you are measuring: your hours, the days you are employed, or the weeks you are paid.
We keep the exact share while we work, and round money to the penny only at the end, so a share such as 22.5 ÷ 37.5 or 19 ÷ 31 never loses accuracy on the way.
- Part-time pay = full-time salary × (your hours ÷ full-time hours)
- Full-time equivalent = your pay ÷ (your hours ÷ full-time hours)
- Part of a month or year = full pay for the period × (days employed ÷ days in the period)
- Term-time pay = full-time salary × (paid weeks ÷ 52)
- Monthly pay = annual pay ÷ 12, weekly pay = annual pay ÷ 52
Worked examples
£30,000 full time (37.5 hours), working 22.5 hours
Three days of five, or 60% of full-time.
Annual pay (gross)
£18,000.00
| Step | Amount |
|---|---|
| Share of full-timeYour hours ÷ full-time hours | 60% |
| Full-time salaryYour full-time salary | £30,000.00 |
| Per yearFull-time salary × share | £18,000.00 |
| Per monthAnnual pay ÷ 12 | £1,500.00 |
| Per weekAnnual pay ÷ 52 | £346.15 |
£2,500 a month, starting on 13 January
19 of 31 calendar days in the first month.
Pay for the days employed (gross)
£1,532.26
| Step | Amount |
|---|---|
| Share of the periodDays employed ÷ days in the period | 61.29% |
| Full pay for the periodThe full pay you entered | £2,500.00 |
| Pay for the days employedFull pay × share of the period | £1,532.26 |
£30,000 full time on a 39-week term-time contract
Paid for 39 of 52 weeks.
Annual pay (gross)
£22,500.00
| Step | Amount |
|---|---|
| Share of full-timePaid weeks ÷ 52 | 75% |
| Full-time salaryYour full-time salary | £30,000.00 |
| Per yearFull-time salary × share | £22,500.00 |
| Per monthAnnual pay ÷ 12 | £1,875.00 |
| Per weekAnnual pay ÷ 52 | £432.69 |
What £30,000 pays at common part-time hours
Pro-rata pay on a £30,000 full-time salary with 37.5 full-time hours, before tax. Use the calculator above for your own salary and hours.
| Your hours per week | Per year | Per month | Per week |
|---|---|---|---|
| 7.5 | £6,000.00 | £500.00 | £115.38 |
| 15 | £12,000.00 | £1,000.00 | £230.77 |
| 16 | £12,800.00 | £1,066.67 | £246.15 |
| 20 | £16,000.00 | £1,333.33 | £307.69 |
| 22.5 | £18,000.00 | £1,500.00 | £346.15 |
| 24 | £19,200.00 | £1,600.00 | £369.23 |
| 30 | £24,000.00 | £2,000.00 | £461.54 |
Part-time salary from a full-time salary
Most job adverts quote the full-time salary and then add "pro rata" if the hours are fewer. Divide your weekly hours by the full-time hours, then apply that share to the salary. Three days out of five is 60%, so £30,000 full time becomes £18,000.
Check which full-time hours your employer uses. 37.5 hours a week is common, but 35 and 40 are too, and the answer changes with it: 22.5 hours is 60% of 37.5, but 56.25% of 40.
Part-time workers should get the same treatment as full-time workers on pay rates and holidays, and some benefits are scaled to hours worked. GOV.UK gives the example of a part-timer on half the hours getting half of a £1,000 bonus.
Full-time equivalent (FTE) salary
Full-time equivalent works the other way. If you know your part-time pay and your hours, divide the pay by your share of full-time to see what the job pays full time. £18,000 for 22.5 of 37.5 hours is a £30,000 full-time salary.
FTE is also used for the share itself: a 60% share is 0.6 FTE. The calculator shows the share as a percentage in the breakdown.
Pay for part of a month or year
If you start or leave part-way through a month, your pay for that month is often a share of a full month. This calculator counts calendar days, including weekends: starting on 13 January means 19 days of a 31-day month, so £2,500 a month becomes £1,532.26.
Some employers count working days instead, or use another method, so your first or last payslip may differ by a few pounds. Your contract or payroll team can tell you which method applies. For a part year, enter the yearly salary and 365 days (366 in a leap year).
Term-time pay
Term-time contracts pay for a set number of weeks. We work out the share as paid weeks ÷ 52. A £30,000 full-time salary on a 39-week contract is £22,500, or £1,875 a month if your employer spreads it evenly over 12 months.
Whether the pay is spread over 12 months or paid only in the term weeks is set by your contract, so check it. Term-time holiday arrangements also depend on the contract.
Pro-rata holiday
Part-time workers get paid holiday too. A regular part-timer's statutory holiday is 5.6 times the days they work in a week, so a 3-day week gives 16.8 days (GOV.UK). Pay for that holiday is part of your normal pro-rata salary.
Gross pay and take-home pay
These figures are gross pay: what you earn before income tax and National Insurance. What reaches your bank account is lower. Under the result you will find a link that opens the Take-Home Pay calculator with your yearly pay already filled in.
Frequently asked questions
How do I calculate pro-rata salary?
Divide the hours you work by the full-time hours, then multiply the full-time salary by that share. For example, £30,000 × (22.5 ÷ 37.5) = £18,000 a year before tax.
What is a £30,000 salary pro rata for 3 days a week?
Three days out of five is 60%, so £30,000 pro rata is £18,000 a year, £1,500 a month and £346.15 a week before tax. Four days out of five would be £24,000.
How do I work out the full-time equivalent salary?
Divide your part-time pay by your share of full-time. For example, £18,000 for 22.5 of 37.5 hours is £18,000 ÷ 0.6 = £30,000 full time. Choose "Full-time equivalent" in the calculator.
How do I work out pay for part of a month?
Multiply a full month of pay by the days you are employed divided by the days in the month. Starting on 13 January with £2,500 a month gives £2,500 × 19 ÷ 31 = £1,532.26. Some employers count working days instead, so your payslip may differ slightly.
How is term-time pay calculated?
Multiply the full-time salary by the paid weeks divided by 52. A £30,000 salary on 39 paid weeks is £22,500 a year, and on 38 paid weeks it is £21,923.08.
Should I use 37.5, 35 or 40 as the full-time hours?
Use the hours your employer counts as full time for your job: check your contract or ask HR. The answer changes with it, because 22.5 hours is 60% of 37.5 but 56.25% of 40.
How much holiday do part-time workers get?
Regular part-time workers get 5.6 times the days they work in a week, so a 3-day week gives 16.8 days of paid holiday a year. See GOV.UK's holiday entitlement rules.
Is pro-rata pay before or after tax?
The figures here are before tax and National Insurance. To see what you would take home, use our Take-Home Pay calculator.
Sources
- GOV.UK: Holiday entitlement
Regular part-time workers get 5.6 weeks' paid holiday, so a 3-day week gives 16.8 days.
- GOV.UK: Part-time worker rights
Part-time workers should get the same treatment as full-time workers on pay rates and holidays; some benefits are scaled to hours worked (half the hours, half of a £1,000 bonus).
This is an estimate for guidance only, not financial or legal advice.
Related calculators
- Hourly Wage CalculatorConvert an hourly rate to annual, monthly, weekly and daily pay, or turn a salary into an hourly rate. Gross pay, before tax.
- Take-Home Pay CalculatorSee what you take home after Income Tax, National Insurance, student loan and pension, for England, Wales and Scotland. Every step shown.
- Holiday Entitlement CalculatorWork out your statutory holiday for part-time, mid-year starters and leavers, and irregular or zero-hours work. Follows the rules of the GOV.UK calculator.