How to Calculate Pro-Rata Holidays

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Planning for holidays is important for both part-time and full-time workers. Both part-time and full-time employees are entitled to a four weeks of paid holiday every working year; the only difference is that the part-time workers are paid holidays on a pro-rata basis. By pro-rata basis it is meant that the holidays of part-time workers will be equal to the weekly working routine that they follow. It is essential to calculate the exact number of pro-rata holidays available after taking a new job to plan for holidays.

Find the number of days in a year that you are entitled to a vacation from your job by consulting your job contract or the terms of appointment. In the United States, most workers are eligible for a vacation of one to four weeks every year.

Determine how soon you will be eligible for vacation. Often you will have to be on the job for six months to a year before being given any vacation time.

Determine how much you work every week compared to a full-time employee. If you work 15 hours a week and the full-time employee works 40 hours, you are a 37.5% employee.

Multiply the number of weeks of holiday entitlement for the full-time employee by your work percentage. If you work 15 hours a week your holiday entitlement might be (0.375 week * 5 days) 15 hours.


  • To estimate the total pro rata holidays available you may add different types of holidays together such as vacation leave, sick leaves, casual leaves etc,.


  • Some companies use slightly different conventions in estimating the pro-rata leaves available to their employees and you must be fully aware of the policies followed by your company to make necessary adjustments to the estimate.