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Pro-rata salary calculator UK

Calculate a part-time annual salary from full-time pay and contracted hours. See gross annual and average monthly pay before tax, NI and pension deductions.

Enter your figures

Your estimate

Annual pro-rata gross pay

£21,000.00

Average monthly gross£1,750.00

Full-time equivalent salary£35,000.00

Gross pro-rata salary before tax, NI and pension deductions. Assumes salary scales directly with contracted hours.

How the pro-rata salary calculator uk works

Part-time salary = full-time salary × your hours ÷ full-time hours.

Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.

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Worked example: part-time salary

This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.

Full-time annual salary (£): 35,000
Full-time weekly hours: 37.5
Your weekly hours: 22.5

Annual pro-rata gross pay: £21,000.00

Part-time salary = full-time salary × your hours ÷ full-time hours.

Part-time salary: questions answered

Is pro-rata salary the same as take-home pay?

No. Pro-rata salary adjusts gross pay for the ratio of your hours to full-time hours. Payroll deductions come afterwards, so use the take-home pay calculator for a separate estimate.

Plan the next step

Take-home pay calculator UK 2026/27: Estimate net annual and monthly employment pay.

Hourly to salary calculator UK: Convert an hourly rate into weekly and annual gross pay.

Browse the work & business calculators for more tools in this topic.

Using your result

Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.

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