2026/27 tax year
UK pro-rata salary calculator
Work out the gross salary and estimated take-home pay for part-time or reduced weekly hours.
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How pro-rata salary is calculated
A pro-rata salary is usually the full-time annual salary multiplied by your proposed weekly hours divided by the full-time weekly hours. For example, 30 hours against a 37.5-hour full-time week is 80% of full-time pay.
What this result includes
The calculated pro-rata gross salary is then run through the 2026/27 PAYE estimate for the tax code, region and student-loan settings selected. This helps you see the difference between a reduction in gross pay and the reduction in money reaching your bank account.
What to confirm with the employer
Check whether unpaid breaks count towards contracted hours, whether the job has a different full-time weekly pattern, and whether pension, overtime, bonuses, holiday and benefits are calculated differently. Those details can change a real offer or payslip.
Income Tax and National Insurance estimates follow HMRC's 2026/27 rates and thresholds.
Guides
How is a second job taxed? — understand second-job tax codes and separate NI deductions.
How to calculate a pro-rata salary — understand part-time pay and what to check in an offer.
How much tax do you pay on overtime? — understand why overtime can look heavily taxed.
Statutory Sick Pay 2026/27 — understand the current SSP rate and first-day rules.
UK tax year 2026/27: what changes? — check which payroll rules apply to your payment date.
What does tax code 1257L M1 mean? — understand the common emergency tax code and what to do next.
Cumulative vs non-cumulative PAYE — understand why a tax code can change what is deducted from your payslip.
Why has my take-home pay gone down? — identify the likely cause of a smaller payment and what to check.