Calculate your prorated salary for a partial pay period by dividing your full monthly or annual pay by the total working days, calendar days, or hours and multiplying by the amount you actually worked.
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Prorated Salary Formula
Prorated Salary = (Full Period Salary / Total Units in Period) * Units Worked
Where:
Full Period Salary is the gross pay you would receive for the complete period, either a full month or a full year.
Total Units in Period is the number of working days, calendar days, or hours that make up the complete period.
Units Worked is the number of those same days or hours you were actually employed or present during the period.
Dividing the full salary by the total units gives your daily or hourly rate, and multiplying that rate by the units you worked gives the prorated pay. Use working days when your salary covers a standard business schedule, calendar days when the agreement counts every day including weekends, and hours when you are paid by the hour for part of the period.
Daily Rate Reference
The daily rate depends on how many days you divide the salary by. The table below shows the daily rate for a sample monthly salary under common counts.
| Monthly Salary | 22 Working Days | 30 Calendar Days |
|---|---|---|
| $3,000 | $136.36/day | $100.00/day |
| $5,000 | $227.27/day | $166.67/day |
| $7,500 | $340.91/day | $250.00/day |
Typical full-time periods are about 21 to 23 working days per month, roughly 260 working days per year, and 2,080 paid hours per year at 40 hours a week.
Example Problems
Example 1. You earn $5,000 per month and start a job partway through a 22 working-day month, working 16 of those days. Your daily rate is 5000 / 22 = $227.27. Your prorated salary is 227.27 * 16 = $3,636.36 for that month.
Example 2. You earn $60,000 per year and leave after working 130 of the 260 working days in the year. Your daily rate is 60000 / 260 = $230.77. Your prorated salary is 230.77 * 130 = $30,000.00.
FAQ
Should I use working days or calendar days? Use working days when your salary is understood to cover a standard business schedule, which is the most common approach for salaried staff. Use calendar days only when your contract or local rule states that pay is divided across every day of the period including weekends.
How do I prorate an annual salary? Set the salary period to year, then divide the annual salary by the total working days or hours in the year and multiply by the amount you worked. You can also divide the annual figure by 12 first to prorate within a single month.
Does a prorated salary change my hourly value? No. Proration only scales your pay to the portion of the period you worked. Your underlying daily or hourly rate stays the same; you simply receive fewer of those units.