Part-Time Salary Calculator

Divide the part-time hours by the full-time hours to get a fraction, then multiply the full-time equivalent (FTE) salary by that fraction. For example, working 22.5 hours out of a 37.5-hour full-time week is 60% of full-time, so a £35,000 FTE salary becomes £21,000 pro rata. This calculator does that automatically and also works out the take-home pay on the pro-rata figure.

It's the salary the role would pay if it were worked full-time. Job adverts and contracts for part-time roles often quote this FTE figure rather than the actual part-time salary, because it makes it easier to compare pay across roles with different hours. This calculator converts that FTE figure into what you'd actually be paid for your part-time hours.

No. Income Tax, National Insurance and student loan repayments are all calculated on your actual annual income, whatever your hours, using the same rates and thresholds as a full-time salary. There's no separate part-time tax rate; a part-time salary is simply taxed like any other salary of the same size.

No, everyone gets the same Personal Allowance regardless of their hours, currently £12,570 (tapered away for income over £100,000). Because a part-time salary is usually lower, a larger share of it tends to fall within the Personal Allowance and basic-rate band, which is one reason part-time roles often have a lower effective tax rate than the full-time equivalent.

Yes. Use the same basis your employer uses to quote the full-time salary, which is normally an annual figure that already includes statutory holiday entitlement, rather than a rate for hours physically worked. If you're unsure, check your contract or ask HR whether the FTE figure already accounts for holiday pay.

There's no single legal definition, but most UK employers treat somewhere between 35 and 40 hours a week as full-time, with 37.5 hours being especially common. Use whatever your specific employer defines as full-time for the role, since that's the figure your pro-rata salary will actually be calculated against.

Workplace pension contributions are usually calculated as a percentage of your actual (pro-rata) salary, so they fall in proportion to your reduced pay. Auto-enrolment eligibility also depends on your actual earnings meeting certain thresholds, so a lower part-time salary can sometimes take you below the automatic enrolment earnings trigger, even though you can normally still opt in.

Yes. Enter the full-time equivalent salary for the role and your own share of the full-time hours, and the calculator works out your individual pro-rata salary and take-home pay, the same way it would for any other part-time arrangement.