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Pro rata salary calculator

Work out your part-time salary from a full-time salary and hours, with monthly, weekly and hourly pay and pro rata holiday.

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Optional: the allowance a full-timer gets, for example 25 days + 8 bank holidays = 33.

Pro rata salary

£18,000

60% of £30,000 full-time

Per month

£1,500.00

Per week

£346.15

Hourly rate (same as full-time)

£15.38

Share of full-time

60%

Statutory holiday (5.6 weeks)

126 hours

Statutory holiday in hours assumes you work 5 days a week or fewer. Your contract may give more than the statutory minimum.

These are gross figures, before Income Tax, National Insurance, pension and student loan deductions.

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How to use

  1. Enter the full-time salary for the job, the figure shown in the advert or your contract.
  2. Choose whether to compare Hours a week or Days a week.
  3. Enter the full-time hours (often 37.5) and your hours, or the full-time days (usually 5) and your days.
  4. Leave Show pro rata holiday ticked to see your statutory holiday, and enter the full-time holiday allowance if you know it.

How it is calculated

  • Share of full time = your hours ÷ full-time hours (or your days ÷ full-time days)
  • Pro rata salary = full-time salary × share of full time
  • Monthly = pro rata salary ÷ 12
  • Weekly = pro rata salary ÷ 52
  • Hourly rate = full-time salary ÷ (full-time hours × 52), the same for full-time and part-time staff
  • Statutory holiday = 5.6 weeks: 5.6 × your days a week, or 5.6 × your hours a week, capped at 28 days
  • Pro rata holiday = full-time holiday × share of full time

Examples

A full-time salary of £30,000 for 37.5 hours a week:

Your hours Share Pro rata salary Monthly Weekly
30 hours (4 days) 80% £24,000 £2,000 £461.54
22.5 hours (3 days) 60% £18,000 £1,500 £346.15
18.75 hours (2.5 days) 50% £15,000 £1,250 £288.46
15 hours (2 days) 40% £12,000 £1,000 £230.77

The hourly rate is £15.38 in every case. Someone on 3 days a week also gets at least 16.8 days of statutory holiday a year.

FAQ

What does pro rata mean in a job advert?

"£30,000 pro rata" means the salary is quoted as if you worked full time. If the job is part time, you are paid the same share of it as your hours are of full-time hours. At 22.5 hours a week against a 37.5-hour full-time week, that is 60%, or £18,000 a year.

How do I work out a pro rata salary?

Divide your hours by the full-time hours and multiply by the full-time salary. For days, divide your days by the full-time days. For example, 3 days out of 5 is 60%, so £30,000 becomes £18,000. Your hourly rate stays the same as a full-timer’s.

What are full-time hours in the UK?

There is no legal definition. Most employers treat 35 to 40 hours a week as full time, with 37.5 hours (7.5 hours a day, 5 days a week) the most common. Use the full-time hours from the job advert or your contract.

How much holiday do part-time workers get?

Part-time workers get 5.6 weeks of statutory holiday, pro rata. Working 3 days a week gives 3 × 5.6 = 16.8 days. If full-timers get more than the minimum, for example 25 days plus 8 bank holidays, part-timers should get the same share of it, so 33 × 60% = 19.8 days.

Is the pro rata salary what I take home?

No. It is gross pay. Income Tax, National Insurance, pension contributions and any student loan repayments come off before you are paid. A lower salary may also take you below the Personal Allowance or the National Insurance threshold.

Do part-time workers have the same rights as full-time workers?

Yes. Part-time workers must not be treated less favourably than comparable full-time workers, including on pay rates, holiday, pensions, training and sick pay, unless the employer can justify it.

Sources

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