Work hours & pay
Pro rata salary calculator
Enter the full-time salary, full-time hours and the part-time hours you work to see the pro rata salary and what it is per week and per day.
Pro rata means proportional: part-time pay is the full-time salary scaled by your share of the hours and weeks.
How a pro rata salary is worked out
Pro rata is Latin for "in proportion", and a pro rata salary is the full-time figure scaled down to the hours you actually work. The calculation divides your weekly hours by the full-time hours to get your share, multiplies that by the weeks you work out of 52, then applies the result to the advertised full-time salary. A $60,000 full-time role based on a 40-hour week, worked at 24 hours a week for the full year, is 24 ÷ 40 = 0.6, so the pro rata salary is 0.6 × $60,000 = $36,000, which is 60% of full-time. Spread over a 3-day week that is about $692 a week and $231 a day.
The weeks field handles term-time and fixed-term roles: working 39 weeks instead of 52 scales the pay down further, by 39 ÷ 52.
| Hours worked | Share of 40-hour week | Pro rata of $60,000 |
|---|---|---|
| 30 | 75% | $45,000 |
| 24 | 60% | $36,000 |
| 20 | 50% | $30,000 |
| 16 | 40% | $24,000 |
Using the figure correctly
A job advert that says "$60,000 pro rata" is quoting the full-time salary; the actual pay for a part-time version is lower, and this tool shows what it becomes. That wording trips up a lot of applicants, so always check the hours the headline figure assumes before comparing offers. Compare roles on their full-time-equivalent salary, the number here scaled back up to full hours, rather than the headline, so a well-paid part-time job is not mistaken for a low-paid one.
Pro rata should apply to more than base pay. Paid holiday, pension contributions and many other benefits are usually proportioned the same way, so a half-time employee typically accrues half the annual leave. Hourly pay, by contrast, stays the same whether you are full or part-time; only the total changes. If your hours vary week to week, use your average weekly hours for a fair estimate, and remember that overtime or extra shifts are normally paid on top of the pro rata base rather than being folded into it.
Frequently asked questions
What does pro rata salary mean?
It means pay in proportion to the hours you work. A salary quoted "pro rata" is the full-time amount; your actual pay is that figure scaled by your share of full-time hours and weeks.
How do I calculate pro rata pay?
Divide your weekly hours by the full-time hours, multiply by the weeks you work out of 52, then multiply by the full-time salary. For 24 of 40 hours all year, that is 0.6 of the salary.
Is holiday entitlement also pro rata?
Usually yes. Paid leave, pension and similar benefits are normally proportioned to your hours, so a half-time employee accrues about half the full-time annual leave.