Skip to the tool
Priostack Apps

Part-time salary calculator (pro rata)

Your part-time pay from the full-time salary and your hours, with every step shown.

Part-time salary calculator

The gross pay for the same job done full time, before tax and National Insurance.

£
Paid

The weekly hours of a full-time employee in the same job. UK law sets none; GOV.UK notes that full time is usually 35 hours or more.

h
Your working time

The hours in your contract, for example 22.5 or 16.

h

Hours worked beyond your contract, if any.

h

The apprentice rate is for apprentices under 19, or 19 and over in the first year of their apprenticeship.

Pro rata salary

—

Enter the full-time salary and your hours to see the result.

Share of full time
—
Monthly pay
—
Weekly pay
—
Hourly rate
—
Hours a week
—
Hours paid a month
—
Minimum hourly rate
—
Minimum for your hours (a year)
—

Recent calculations

Nothing yet: copy, export or save a calculation to find it here.

Related apps

  • Salary calculator

    Work out take-home pay from your salary, or the salary you need for a take-home figure, after Income Tax, National Insurance and student loans for 2026/27.

  • Hourly wage calculator

    Turn an hourly rate into daily, weekly, monthly and annual pay, or a salary into an hourly rate, and check it against the 2026 minimum wage.

  • Take-home pay calculator

    Work out your take-home pay for 2026/27: Income Tax (Scottish rates too), National Insurance, student loans and pension, by the year, month or week.

  • Pay rise calculator

    Work out a pay rise from a percentage, an amount or your new salary, per hour, week, month or year, and check it against inflation and the minimum wage.

See all 11 apps in Pay and employment

How it works

Enter the full-time salary for the job, the full-time hours and your own hours, or your share of full time (0.6 FTE is 60%). You get your pro rata salary for the year, the month and the week, your hourly rate and the minimum wage for your hours, with the workings. The minimum wage rates are those in force since 1 April 2026: £12.71 an hour for workers aged 21 and over.

Start from the full-time salary

Part-time workers have the right to be paid at least the same as a comparable full-time worker, in proportion to their hours: the pro rata principle of the Part-time Workers Regulations 2000, with matching regulations in Northern Ireland. Enter the gross salary for the same job done full time (a year, a month, a week or an hour) and the hours a full-time employee works. UK law sets no standard full-time week; GOV.UK notes that it is usually 35 hours or more.

Enter your hours or your FTE

Give your contracted hours a week, or switch to a percentage: 3 days out of 5 is 60%. Monthly figures use 52 weeks divided by 12, as HMRC does when it turns annual hours into monthly ones.

Add any extra hours

Hours worked beyond your contract are added at your basic hourly rate. The law does not require an overtime premium, and a part-timer need not get one until they work more than the full-time hours; your contract may be more generous.

Check the minimum wage

The hourly rate of the job is compared with the minimum wage for your age: £12.71 from 21, £10.85 from 18 to 20, and £8.00 under 18 and for apprentices under 19 or in their first year. These rates apply across the UK and rise on 1 April 2027 to £13.21, £11.27 and £8.31. Every amount is rounded to the nearest penny, with halves rounded up.

Pro rata salary = full-time salary × your hours ÷ full-time hours.

Monthly pay = pro rata salary ÷ 12; weekly pay = pro rata salary ÷ 52.

Hourly rate = full-time salary for a year ÷ (full-time hours × 52).

Example: 22.5 hours a week on a £30,000 full-time salary

With a 37.5-hour full-time week, 22.5 hours is 60% of full time. The pro rata salary is £30,000.00 × 22.5 ÷ 37.5 = £18,000.00 a year, which is £1,500.00 a month or £346.15 a week. The hourly rate, £30,000.00 ÷ (37.5 × 52) = £15.38, is above the National Living Wage of £12.71; at that minimum, 22.5 hours a week would pay £12.71 × 22.5 × 52 = £14,870.70 a year.

Frequently asked questions

How do I work out a pro rata salary?

Multiply the full-time salary by your weekly hours and divide by the full-time hours. On a £28,000 salary for a 37.5-hour week, 30 hours a week gives £28,000 × 30 ÷ 37.5 = £22,400 a year. GOV.UK applies the same rule to other pay: if a full-time worker gets a £1,000 bonus, a part-timer on half the hours should get £500.

What does 0.6 FTE mean?

FTE stands for full-time equivalent. 0.6 FTE is 60% of full time, for example 3 days out of 5, or 22.5 hours of a 37.5-hour week. A 0.6 FTE job advertised at £35,000 FTE pays £35,000 × 0.6 = £21,000 a year.

What is the minimum wage for part-time work?

The same hourly rates as for full-time work. Since 1 April 2026 they are £12.71 an hour at 21 and over, £10.85 at 18 to 20, and £8.00 under 18 and for apprentices under 19 or in the first year of their apprenticeship. Over a year, 20 hours a week at £12.71 comes to £13,218.40.

Do part-time workers get paid overtime?

Not necessarily. UK law sets no overtime rate, and under the Part-time Workers Regulations a part-timer need not be paid a premium until their hours, extra hours included, go beyond the normal hours of a full-time worker. Your contract says what you are paid for extra hours.

How much holiday do part-time workers get?

Part-time workers with regular hours for the whole year are entitled to at least 5.6 weeks of paid holiday, like full-time workers: 5.6 times the days they work in a week, so fewer than 28 days when they work fewer than 5 days a week. Someone working 3 days a week gets at least 5.6 × 3 = 16.8 days.

Is this my take-home pay?

No. This calculator gives gross pay, before Income Tax, National Insurance, student loan and pension deductions. Use a take-home pay calculator to go from gross to net.

Sources

  1. GOV.UK: Part-time workers' rights (5 November 2026)
  2. legislation.gov.uk: Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000, regulation 1 (the pro rata principle) (1 July 2000)
  3. legislation.gov.uk: Part-time Workers (Prevention of Less Favourable Treatment) Regulations (Northern Ireland) 2000, regulation 1 (1 July 2000)
  4. GOV.UK: National Minimum Wage and National Living Wage rates (5 November 2026)
  5. HMRC: Calculating the minimum wage, working hours for which the minimum wage must be paid (23 October 2026)
  6. GOV.UK: Holiday entitlement (5 November 2026)

This calculator gives general information, not legal, tax, financial or accounting advice. Your contract or a collective agreement may give you more: check with your employer, your union or an adviser.

Last reviewed: