How do I work out a pro rata salary?

Multiply the full-time salary by your hours and divide by the full-time hours. £30,000 × 22.5 ÷ 37.5 = £18,000.

What does 0.6 FTE mean?

Sixty percent of full-time hours and, normally, sixty percent of the full-time salary. On a 37.5-hour week that is 22.5 hours.

How much holiday do part-time workers get in the UK?

The same 5.6 weeks as full-time staff, in their own hours. Someone working 20 hours a week is entitled to 112 hours a year.

Is the pro rata salary before or after tax?

Before. Tax, National Insurance, pension and student loan repayments are deducted from it. The Personal Allowance is not reduced for part-time work.

Pro rata salary calculator (UK)

By The Income Tracker · Updated 16 September 2026

The short answer

Pro rata pay is the full-time salary multiplied by your hours divided by the full-time hours. A £30,000 job on 37.5 hours pays £18,000 for 22.5 hours a week, or £1,500 a month before tax. Statutory holiday is 5.6 weeks of your own working hours, so 22.5 hours a week gives 126 hours a year.

Full-time annual salary£ Full-time hours per week Your hours per week

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The formula

Pro rata salary = full-time salary × (your weekly hours ÷ full-time weekly hours). The hourly rate is the full-time salary divided by (full-time hours × 52). Holiday is 5.6 weeks of your own hours, capped at 28 days’ worth for people who work more than five days a week.

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

22.5 ÷ 37.5 is 0.6, so the pro rata salary is £18,000: £1,500 a month or £346.15 a week before deductions. The hourly rate is £15.38. Holiday is 5.6 × 22.5, or 126 hours a year, which is 16.8 of your 7.5-hour days.

Things that are not pro rata

The Personal Allowance and tax bands are not reduced for part-time work, so part-time earnings are taxed relatively lightly.
Some benefits in kind, such as a fixed phone allowance, may be given in full. Check the contract.
Bank holidays: a part-timer working Monday to Wednesday gets a pro rata share of bank holidays, not just the ones that fall on their days. Employers must handle this fairly.

Budgeting on part-time pay

The monthly figure above is before tax. Put the take-home amount from your payslip into the budget planner, or import your bank CSV into The Income Tracker to see where it goes.

The Income TrackerTrack what actually lands each month against your bills.

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Frequently asked questions

How do I work out a pro rata salary?: Multiply the full-time salary by your hours and divide by the full-time hours. £30,000 × 22.5 ÷ 37.5 = £18,000.
What does 0.6 FTE mean?: Sixty percent of full-time hours and, normally, sixty percent of the full-time salary. On a 37.5-hour week that is 22.5 hours.
How much holiday do part-time workers get in the UK?: The same 5.6 weeks as full-time staff, in their own hours. Someone working 20 hours a week is entitled to 112 hours a year.
Is the pro rata salary before or after tax?: Before. Tax, National Insurance, pension and student loan repayments are deducted from it. The Personal Allowance is not reduced for part-time work.

Sources and checking

Facts on this page were last checked on 2026-09-16 against:

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