Pro-rata pay scales a full-time salary to the hours or days you actually work. It is common for part-time roles, job shares and term-time contracts.
How it’s worked out
Pro-rata salary = full-time salary × (actual ÷ full-time), using either hours or days per week.
Worked examples
- £40,000 full-time, 3 days of 5 → 60% → £24,000
- £37,500 full-time, 22.5 hours of 37.5 → 60% → £22,500
Some employers use 35, 37.5 or 40 hours as full-time — match the contract. This tool shows gross pay only; use the pay rise or student loan calculators for net pay.
Frequently asked questions
How do I calculate a pro-rata salary?
Divide the hours or days you work by the full-time hours or days, then multiply by the full-time salary. Example: 3 days of a 5-day week is 60% of the full-time pay.
Disclaimer: Results are estimates for guidance only. They are not financial, tax or legal advice. Rules vary with your circumstances — check official guidance or speak to a qualified adviser before making decisions.
Sources
- Income Tax rates and Personal Allowance (checked 5 October 2026)
- Scottish Income Tax rates (checked 5 October 2026)
- Rates and thresholds for employers 2026 to 2027 (checked 5 October 2026)
- National Insurance: how much you pay (checked 5 October 2026)
- National Insurance rates and categories (checked 5 October 2026)
- 2026 to 2027: Student and Postgraduate Loan deduction tables (checked 5 October 2026)
- Tax on dividends (checked 5 October 2026)
- Corporation Tax rates and allowances (checked 5 October 2026)
- Income Tax — changes to tax rates for property, savings and dividend income (checked 5 October 2026)