Pro Rata Salary Calculator UK 2025/26

Calculate your part-time salary based on full-time equivalent

Calculate Your Pro Rata Salary

Enter the full-time salary and your working hours to calculate your pro rata salary.

What is Pro Rata Salary?

Pro rata salary is a way of calculating part-time pay based on the full-time equivalent salary. It ensures that part-time workers are paid fairly in proportion to their working hours compared to full-time employees.

How Pro Rata Calculation Works

The formula for calculating pro rata salary is:

Pro Rata Salary = (Full-Time Salary × Part-Time Hours) ÷ Full-Time Hours

Example Calculation

If a full-time role pays £35,000 for 40 hours per week, and you work 20 hours per week:

  • Full-Time Salary: £35,000
  • Full-Time Hours: 40
  • Part-Time Hours: 20
  • Pro Rata Salary: (£35,000 × 20) ÷ 40 = £17,500

Frequently Asked Questions

What are the benefits of pro rata calculation?

Pro rata calculation ensures fair pay for part-time workers by:

  • Maintaining pay equity between full-time and part-time employees
  • Providing transparency in salary calculations
  • Ensuring proportional benefits and entitlements
  • Making it easier to compare different working arrangements
How does pro rata affect benefits?

Many benefits are also calculated pro rata for part-time workers, including:

  • Holiday entitlement
  • Pension contributions
  • Bonus payments
  • Other workplace benefits

However, some benefits may be provided in full regardless of hours worked.

Is pro rata calculation required by law?

Yes, UK employment law requires that part-time workers receive the same treatment as full-time workers on a pro rata basis. This is covered by the Part-Time Workers (Prevention of Less Favourable Treatment) Regulations 2000.