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Pro Rata Salary Calculator

Turn a full-time salary into the pro rata salary for part-time hours: your FTE fraction, annual, monthly and weekly pay, the hourly rate and the pro rata annual leave you are due.

Full-time annual salary

Full-time hours per week

Your contracted hours per week

Full-time annual leave

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How it works

FTE = your weekly hours ÷ full-time weekly hours · pro rata salary = full-time salary × FTE · monthly = ÷ 12, weekly = ÷ 52 · pro rata leave = full-time leave days × FTE

Job adverts often quote the full-time salary even for part-time roles, followed by "pro rata": you are paid the same hourly rate as a full-time colleague, but only for the hours you work. The fraction of full time you work — your FTE — scales the salary and, usually, paid annual leave too. Equal treatment of part-time workers is required under the EU Part-Time Work Directive and UK part-time worker regulations, among others.

Worked example

A full-time salary of $45,000 for 37.5 hours a week, worked part time at 22.5 hours. The FTE is 22.5 ÷ 37.5 = 0.60, so the pro rata salary is $45,000 × 0.60 = $27,000.00 a year — $2,250.00 a month or $519.23 a week. The hourly rate stays $23.08/h, and 25 days of full-time leave become 15.0 days.

Sources: GOV.UK — Part-time workers' rights

Frequently asked questions

What does pro rata salary mean?

It means the advertised full-time salary is scaled to the hours you actually work. A $45,000 pro rata job at 3 days of a 5-day week pays $27,000.

How do I calculate pro rata salary?

Divide your weekly hours by the full-time weekly hours to get your FTE, then multiply the full-time salary by it. 20 of 40 hours is 0.5 FTE, so a $50,000 salary becomes $25,000.

Is pro rata leave calculated the same way?

Usually yes: full-time leave days × your FTE. If you work full days on fewer days a week, you can also scale by days: 3 of 5 days on 25 days of leave gives 15 days.

Does my hourly rate change if I work part time?

No. Pro rata pay keeps the hourly rate the same; only the number of paid hours changes.

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Statutory holiday for full-time, part-time, shift, irregular-hours and part-year workers — 5.6 weeks pro rata in days or hours, starting or leaving part way through the leave year, the 12.07% accrual per pay period with rolled-up holiday pay, bank holidays by nation and pay for untaken leave.

Estimates for planning only. Your employment contract, collective agreement and local labor law decide what you are actually owed; check with your employer, payroll team or a qualified adviser before relying on a figure.