Calculate your pro rata salary, pay or wage in seconds.
Use our free pro rata calculator UK to work out your part-time salary, pay or wage from a full-time salary. Get instant gross estimates with annual, monthly, weekly, daily and hourly amounts.
A pro rata salary is the portion of a full-time salary that corresponds to the hours, days or percentage of full-time work you do. For example, someone working 60% of a full-time pattern would usually start with 60% of the full-time salary before considering any other contractual adjustments.
Our pro rata calculator UK makes that comparison instantly and shows the result in useful pay periods.
Learn more about pro rata pay →The basic formula for a salary adjusted by weekly hours is:
For example, if you earn £30,000 full time and work 22.5 hours instead of 37.5 hours:
£30,000 × (22.5 ÷ 37.5) = £18,000
| Full-Time Salary | 1 Day (20%) | 2 Days (40%) | 3 Days (60%) | 4 Days (80%) | 5 Days (100%) |
|---|---|---|---|---|---|
| £20,000 | £4,000 | £8,000 | £12,000 | £16,000 | £20,000 |
| £30,000 | £6,000 | £12,000 | £18,000 | £24,000 | £30,000 |
| £40,000 | £8,000 | £16,000 | £24,000 | £32,000 | £40,000 |
| £50,000 | £10,000 | £20,000 | £30,000 | £40,000 | £50,000 |
Practical UK-focused guides explaining pro rata salary, FTE and reduced working patterns.
Work out pro rata holiday entitlement when leaving a UK job, including accrued leave, untaken holiday pay and final-pay checks.
Read guide →Reverse a pro rata salary to find the full-time equivalent salary using FTE, weekly hours or days, with simple UK worked examples.
Read guide →Convert a UK annual salary into an hourly rate and pro rata part-time salary using contracted weekly hours, FTE and clear examples.
Read guide →Common questions about pro rata pay, working hours and our calculator.
Pro rata means “in proportion”. In salary calculations, it usually means scaling a full-time salary to match a reduced working pattern such as fewer hours, fewer days or a lower FTE.
For hours, divide your weekly hours by the full-time weekly hours and multiply the full-time annual salary by that fraction. Our calculator does this automatically and shows the working.
Part-time describes the working pattern. Pro rata describes a common way of calculating the salary for that reduced working pattern. Employers may advertise either the full-time equivalent salary or the actual part-time salary, so check the wording.
No. The main calculator estimates gross pay before Income Tax, National Insurance, pension contributions, student loan deductions, salary sacrifice or other payroll adjustments.
Yes. Choose By Days or By FTE at the top of the calculator. Hours are usually the most precise method if working days have different lengths.