Pro Rata Salary Calculator

Part-time jobs are often advertised with a full-time salary and the words “pro rata”. That means you are paid the same rate as a full-time employee, scaled down to the time you actually work. The calculation is a simple ratio: your hours divided by the full-time hours, multiplied by the full-time salary. If you know your working pattern in days instead, switch to “By days” and the same ratio is applied to days.

Your monthly and weekly pay are worked out from the pro rata annual salary: divide it by 12 for monthly pay and by 52 for weekly pay. If you'd rather work from an hourly figure, use the hourly rate calculator to convert your pro rata salary into an hourly rate, or the other way round.

Part-time teaching contracts are a common example. Teachers on a part-time contract are usually paid a proportion of the full-time salary for their point on the pay range, so it helps to check that full-time figure first with the England teacher pay scales and then pro-rate it here.

Holiday works the same way. Part-time workers are entitled to the same 5.6 weeks of statutory paid holiday as full-time workers, but measured in their own working days or hours, so your pro rata holiday entitlement follows the same ratio as your pay. You can check the number of days with the holiday entitlement calculator.

Switch to “After tax” to estimate your take-home pay. Income Tax and National Insurance are worked out on your pro rata salary, not the full-time salary, because tax is based on what you actually earn. That means take-home pay often falls by less than your hours do: more of a smaller salary sits inside the tax-free Personal Allowance.