Pro Rata Salary Calculator
Work out a part-time salary from the full-time salary and hours.
Pro rata annual salary
£21,000.00
- Monthly
- £1,750.00
- Weekly
- £403.85
v1.0 · Reviewed September 2026
How this is worked out
The full-time salary is scaled by your share of full-time hours: salary × your hours ÷ full-time hours. Monthly divides by 12 and weekly by 52.
Worked example
- Full-time salary £35,000
- Full-time hours 37.5
- Your hours 22.5
35,000 × 22.5 ÷ 37.5
£21,000.00 a year, £1,750.00 a month
Assumptions and limits
- Gross pay before tax, National Insurance and pension.
- A straight hours based split. Allowances, shift premiums and benefits are often pro rated differently, and holiday entitlement is worked out separately.