Pro-Rata Salary Calculator

Work out the part-time salary equivalent of a full-time role.

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About this calculator

Part-time roles are usually advertised with a full-time equivalent (FTE) salary — "£32,000 pro rata" — leaving you to work out what you'd actually be paid. This calculator does the division properly: your hours as a proportion of full-time hours, applied to the full-time salary, with monthly and weekly figures included.

The formula

Pro-rata salary = Full-time salary × (Your hours ÷ Full-time hours)

Worked example

A role advertised at £32,000 FTE (37.5 hours) worked at 22.5 hours:

Proportion = 22.5 ÷ 37.5 = 60%
Pro-rata salary = £32,000 × 0.6 = £19,200 ≈ £1,600/month

Common mistakes

Assuming full-time is always 37.5 hours — some employers use 35, 37 or 40, which changes the result.
Forgetting that holiday entitlement is also pro-rated, including bank holidays for part-week workers.
Comparing pro-rata gross to your old full-time take-home — tax bands don't scale down, so part-time take-home is proportionally better.

Frequently asked questions

Full-Time Equivalent — the salary the role would pay if worked full time. 0.6 FTE means 60% of full-time hours and 60% of the FTE salary.

Best practice is to pro-rate the total holiday entitlement including bank holidays, so people who don't work Mondays aren't unfairly advantaged or penalised.

No — term-time contracts also scale by weeks worked per year, not just hours per week, and are usually paid in 12 equal instalments.

Assumptions & limitations

Scales salary linearly by hours. Benefits, bonuses and holiday should be pro-rated the same way but are not itemised here.

Sources & verification

This calculator applies the standard formula published above to the figures you enter — it relies on no external statutory data. The formula and the worked example were checked by hand against each other.

Formula last verified: 24 July 2026

Maintained by: Steve Davis, Founder & Editor — see our editorial standards

Spotted an error or an out-of-date figure? Report it — corrections are prioritised over all other work (see our corrections policy).