Subhan
29 May 2025

Pro Rata Salary Calculator | Zelt HR

Part-time work can allow employees more flexibility. Mostly people get tired while working full-time and want to move to working part-time, which helps them to balance their work life while dealing with their personal activities. You and your staff can move to part-time work and hire new employees on part-time contracts. But the problem is, how they will get paid for their part-time work?

Manually calculating their salary can be time-consuming and may not give correct results. You can use our pro rata salary calculator, which helps you to calculate your salary more accurately and quickly. It will not only save you time on manual calculations but also provide transparency between employee and employer.

Select Salary Type
Salary/Wage Amount (£)
Total Days in Month
Days Worked
Pro Rata Salary £0.00
Optional: Pro Rata Holiday
Annual Holiday Entitlement (e.g. 28)
Work Days per Week
Pro Rata Holiday 0.0 days

What is pro rata salary?

Pro rata is a shortened term for “proportional rate”. Employees who work part-time are offered pro rata pay. It is the proportion they would receive if they worked full-time. Pro rata pay is only offered to part-time employees who usually have fewer work hours as compared to full-time employees, freelancers, and temporary employees.

For example, a part-time employee with an annual salary of $20,000 who worked 20 hours instead of 40 would receive a $10,000 annual salary.

How to calculate pro rata salary

pro rata holiday calculator, pro rata salary calculator
You can easily calculate your pro rata pay by using our calculator, but there are also some formulas or steps that you can use for manually calculating your pro rata pay.

If someone has not worked for the full month or is working part-time, here’s the standard basic formula (monthly salary):

Pro Rata Salary =(Annual Salary ÷ 12) ÷ Total Working Days in Month × Days Worked

Or simply:

Pro Rata Salary = Monthly Salary ÷ Total Days in Month × Days Worked

Here are some steps you can use to do calculations for yourself:

  1. Divide your total annual salary by 52 weeks.
  2. Divide the results by the number of full-time work hours (it gives you the hourly rate).
  3. Multiply the results by the number of weeks you actually worked for (pro rata hours per week).
  4. Multiply the results by 52 to get the pro rata pay.

How to use our Pro Rata Salary Calculator

You have to calculate the salary of an employee who worked part-time during the year instead of full-time. You can use our calculator by using the following steps to calculate pro rata wage or salary easily:
Select Salary Type:

  • Monthly Salary
  • Annual Salary
  • Daily Wage
  • Hourly Wage

Enter the Salary or Wage Amount: Example: £60,000 for monthly, £800 for daily, etc.

Fill in Time Worked:

  • For salary: enter total days in the month and days worked.
  • For hourly: just enter total hours worked.

Click “Calculate”: You’ll immediately see the pro rata amount based on the days/hours worked.

How to work out pro rata holiday

Working out pro rata holidays is also as important as working out pro rata salary. It is the number of proportional holidays a part-time employee receives. In the UK, a full-time employee working 5 days a week is entitled to 28 holidays, including bank holidays.

You can get pro rata holiday entitlement If you figure out the number of days your part-time employee usually works (maybe 3 or 4 days) and multiply it by 5.6 to calculate their entitlement.

You can use this simple formula:  Pro Rata Holiday=(Annual Entitlement ÷ Total Working Days in Year) × Days Worked
Example of a Part-Time Worker

  • Full-time: 28 days/year (for 5 days/week)
  • Part-time: Works 3 days/week

Pro Rata Holiday =(28 ÷ 5) × 3 = 16.8 days/year
Round holiday entitlement to the nearest half or whole day if needed. Also, double-check you’re being fair and legal.

Who does pro rata annual salary apply to?

There is always a question raised: “What are the criteria an employee must satisfy in order to receive a prorated salary?” If an employee meets any of the following criteria, they are typically eligible for a pro-rata salary:

  • Working part-time in a business
  • Joining a company in the middle of a pay period
  • Resignation or dismissal in the middle of a pay period
  • Being promoted in the middle of a pay period
  • Working for a specific time period

Conclusion

If you are thinking about moving part-time or want to hire part-time contractors, then you can use our pro rata salary calculator to easily calculate the pro rata pay with the most accuracy and quickly. It not only saves you time but also creates transparency between employees and employers. From calculating pro rata holiday to understanding the eligibility criteria, our tool helps you handle it all smoothly and confidently.

And if you’re looking for a more comprehensive solution, platforms like Zelt HR Software not only handle your pro rata but also your entire HR and payroll process, from onboarding to time-off tracking, all in one place.