Prorated Salary Calculator
Calculate prorated salary for a partial pay period. Enter your annual salary and the dates worked to estimate gross pay by calendar day or working day.
Prorated Salary Calculator
Annual Salary
Pay Period
Dates Worked
Enter the first date the employee was active and the close date of the pay period being calculated. The full pay period is worked out from the pay period length and the end date.
Proration Method
Enter the exact divisor and days your employer used. For someone who leaves mid-period, enter the days in the full period and the days worked through the last day.
Estimates only. Gross pay before taxes and deductions. This is not tax or legal advice. Download the Timeclock44 app to track hours and pay across pay periods.
Track Partial Pay Periods Automatically
Logging a mid-period start or a schedule change by hand is easy to get wrong. The app records every shift, so prorated pay is simple to check.
What is a prorated salary?
A prorated salary pays a salaried employee for the part of a pay period they actually worked, instead of the full period amount. Proration comes up any time someone is not on the clock for the whole period.
The usual triggers are new hires who start mid-period, employees who leave before the period closes, unpaid leave, a mid-month raise that splits the period into two rates, and a schedule change partway through. In each case the full-period salary is scaled down to match the days worked.
How to calculate prorated pay (formula and example)
Proration takes three steps:
- Full-period pay: annual salary divided by the number of pay periods in a year.
- Daily rate: full-period pay divided by the total days in that period.
- Prorated total: daily rate multiplied by the days actually worked.
Here is a worked example. A $75,000 salary paid monthly has a full-period pay of $6,250. If the month has 22 workdays and the employee worked 15 of them, the daily rate is $6,250 / 22, or about $284.09. The prorated pay is $284.09 multiplied by 15, which is about $4,261.36.
The number of pay periods per year depends on the pay schedule:
| Pay period | Periods per year |
|---|---|
| Weekly | 52 |
| Bi-weekly | 26 |
| Semi-monthly | 24 |
| Monthly | 12 |
| Annual | 1 |
Calendar days vs. working days: which method to use
The working-days method counts only Monday through Friday, which works out to a year of roughly 260 days. Most payroll teams use this standard, because it ties the daily rate to days an employee was expected to work.
The calendar-days method counts every day, weekends included, in both the days worked and the full period. A 365-day divisor produces a daily rate about 29 percent smaller than a 260-workday divisor, but the weekends inside the worked range count as days worked too, so over a month the prorated amount usually lands within a few percentage points of the working-days figure. A monthly employee who starts on Monday, October 12, 2026 is paid for 15 of 22 working days (68.2 percent of the month's pay) or 20 of 31 calendar days (64.5 percent). Neither method always pays more, and over a weekly or bi-weekly period a single weekend moves the result further. Some employers and certain rules outside the U.S. use this approach, so it is offered here for transparency.
Confirm which method your employer uses before you rely on a figure. If they apply an exact divisor that does not match either standard method, use the Custom days option and enter the total days in the period and the days worked directly. Custom days also covers someone who leaves mid-period: enter the days in the full period and the days worked through the last day.
Prorating for mid-period raises and partial months
This calculator handles one salary rate per run. When a raise takes effect mid-period, the period splits into two parts: days before the change at the old rate and days after at the new rate. Run the calculator twice and add the two prorated results: once at the new rate, with the first day at that rate and the period end date, and once at the old rate with Custom days, entering the days in the full period and the days worked before the change. If a raise should have applied to an earlier period, the retroactive pay calculator handles the catch-up amount.
Paid holidays and approved paid leave that fall on weekdays count automatically in the working-days method, because every Monday through Friday from the first day worked through the period end is counted as a paid day. For bi-weekly period totals see the bi-weekly timecard calculator, and for turning recorded hours into decimal payroll time use the payroll time converter.
This tool gives estimates only and is not tax or legal advice. Confirm prorated amounts with your payroll department.
Frequently Asked Questions
Common questions about prorated salary calculator
How do I calculate a prorated salary?
Divide the annual salary by the number of pay periods in a year to get the full-period pay. Divide that by the total days in the period to get a daily rate, then multiply the daily rate by the days actually worked. For example, $75,000 / 12 / 22 workdays * 15 days worked is about $4,261.36.
Should prorated pay use working days or calendar days?
Working days (Monday through Friday) is the more common method, since it reflects a roughly 260-day work year. The calendar-days method counts every day, so its daily rate is about 29 percent smaller, but the weekends in the worked range count as days worked too. Over a month the two results usually land within a few percentage points: a monthly employee who starts on October 12, 2026 is paid for 15 of 22 working days (68.2 percent) or 20 of 31 calendar days (64.5 percent). Ask payroll which divisor they use and pick the matching method here, or use the Custom days option to enter their exact figures.
How is salary prorated for a new hire who starts mid-month?
Set the pay period to Monthly, enter the first day worked as the start date and the period close date as the end date, then choose the Working days method. The calculator counts the workdays from the start date through the period end and pays that share of the monthly salary.
How do I calculate pay when I get a raise in the middle of a pay period?
Run the calculator twice and add the two prorated results. For the new salary, enter the first day at the new rate and the period end date. For the old salary, use Custom days: enter the days in the full period and the days worked before the raise. Our retroactive pay calculator at /tools/retroactive-pay-calculator/ can help if a raise should have applied to an earlier period.
What is the daily rate for a salaried employee?
The daily rate is the full-period pay divided by the total days in that period. With the working-days method, a $5,000 monthly salary across 22 workdays gives a daily rate of about $227.27. To see an equivalent hourly figure, try the salary vs hourly calculator at /tools/salary-vs-hourly-calculator/.
Do paid holidays count toward prorated salary?
Yes. The working-days method counts every Monday through Friday, so a paid holiday that falls on a weekday is already counted as a paid day in both the days worked and the full period. There is nothing extra to enter.
How does proration affect tax withholding on my paycheck?
Withholding is based on the gross pay of the actual check, so a smaller prorated check usually has less tax withheld than a full-period check. Year-end totals still depend on total annual income. This tool shows gross pay only and is not tax advice.
Is prorated salary the same as part-time pay?
No. Proration adjusts a full salary for a partial pay period, such as a mid-period start or departure. Part-time pay reflects an ongoing reduced schedule. A part-time salary can also be prorated if the worker starts or leaves mid-period.