Pro-Rata Salary Calculator
Our pro-rata salary calculator works out part-time salary from a full-time equivalent. Formula: (FTE salary / FTE hours) x your hours. A £35,000 FTE at 30hrs/week (vs 37.5 FTE) = £28,000/year pro-rata.
Pro-Rata Salary Calculator
Calculate your pro-rata salary for part-time hours, or work out your pay for a partial period.
How to Use the Pro-Rata Salary Calculator
Enter the full-time equivalent (FTE) annual salary — this is the salary the role pays for a standard full working week, typically 37.5 or 40 hours in UK employment. Then enter your contracted part-time hours per week. The pro-rata calculation divides the FTE salary by FTE hours and multiplies by your actual hours to give your adjusted annual salary.
Pro-rata applies to all elements of pay: basic salary, most contractual allowances, and in many cases bonus entitlements. It also affects statutory entitlements — holiday entitlement, for example, is pro-rated for part-time workers but must be no less proportional than what a full-time employee receives. The legal minimum for part-time workers is the same proportion of the full-time allowance.
Note that pro-rata salary affects some other calculations. Mortgage lenders assess affordability based on your actual employed income, so your reduced salary is the figure used in affordability assessments. Similarly, statutory maternity pay is based on your average weekly earnings over a reference period — if you are planning parental leave, understanding your actual salary figure (not the FTE equivalent) matters for statutory pay calculations.
The tax and take-home results use your pro-rata salary as the input. Even if you know the FTE salary and could calculate the take-home on that, the actual figures on your payslip are based on your pro-rata income. Use the take-home result to budget accurately for your actual working arrangement rather than the FTE equivalent.