Prorated Salary Calculator
Fast Partial Paycheck Math
When an employee starts or leaves a job in the middle of a pay period, you cannot pay them their full standard salary. You must pay them only for the exact amount of time they were employed. This process of dividing up a standard salary to fit a smaller timeframe is called prorating.
Doing this math by hand often leads to payroll errors. This free prorated salary calculator instantly figures out the exact gross wage owed to an employee for a partial pay period.
Last updated: July 2026
What Does Prorated Pay Mean?
If you are new to payroll, you might ask: what does prorated pay mean?
"Pro rata" is a Latin term that means "in proportion." If a salaried worker's contract states they earn $5,000 every month, that $5,000 is based on them working the entire month. If they only work exactly half of the month, their pay is divided in half. They receive a proportionate share—$2,500.
A partial month salary calculator is necessary because months do not have a uniform number of days. February has 28 days, while March has 31. The math required to find the exact daily rate changes depending on the month the employee starts or leaves.
How to Use This Prorate Calculator
This tool removes the guesswork from calculating partial paychecks. Follow these steps:
- Enter the Salary: Input the employee's normal gross pay. You can enter this as a yearly figure (e.g., $60,000) or a standard monthly figure (e.g., $5,000).
- Set the Pay Period: Select whether the employee is normally paid monthly, semi-monthly, or bi-weekly.
- Total Days in Period: Enter the total number of days in this specific pay cycle. (See the section below on Working Days vs. Calendar Days to choose the right number).
- Days Worked: Enter the exact number of days the employee was active and employed during this cycle.
The calculator will immediately output the daily rate and the final prorated gross pay. Note that this tool does not calculate net pay after taxes.
How to Prorate Salary for a New Hire
The most common reason to calculate prorated salary is onboarding a new employee.
Let's assume your company runs payroll on the 1st and 15th of every month. You hire a new manager, but they cannot start until the 8th of the month.
When the 15th arrives, you cannot pay them for the full two-week cycle. To figure out how to prorate salary for a new hire, you must isolate their daily pay rate, count the exact days they were on the schedule between the 8th and the 15th, and multiply the two numbers.
The Prorated Salary Formula
If you want to do the math on paper, the standard prorated salary formula takes three steps.
- Find the Standard Period Pay: Divide the annual salary by the number of pay periods in a year (12 for monthly, 24 for semi-monthly, 26 for bi-weekly).
- Find the Daily Rate: Divide that standard period pay by the total number of days in that specific period.
- Multiply by Days Worked: Multiply the daily rate by the number of days the employee actually worked.
Real Example: A $60k Prorated Salary
Let's use a standard $60k prorated salary to show exactly how the math works.
Our employee makes $60,000 a year. They get paid once a month. Their standard monthly paycheck is $5,000 ($60,000 ÷ 12).
They quit their job in November. They only worked 10 days in November before leaving. How much is their final paycheck?
- Standard Monthly Pay: $5,000
- Total Work Days in November: 22 days
- Daily Rate: $5,000 ÷ 22 = $227.27 per day
- Days Worked: 10 days
- Final Prorated Pay: $227.27 × 10 = $2,272.70
Their final gross paycheck will be $2,272.70.
Working Days vs. Calendar Days
In the example above, we used 22 days as our base because November has 22 standard Monday-to-Friday working days. However, under the Fair Labor Standards Act (FLSA), employers can actually choose between two different methods to establish a daily rate.
Method 1: Working Days
You only count the days the business is open (typically Monday through Friday).
- Pros: Usually results in a higher daily rate, which employees prefer. It makes sense for office jobs that are closed on weekends.
- Cons: The number of working days changes every single month (usually between 20 and 23), requiring you to look at a calendar every time you run payroll.
Method 2: Calendar Days
You count every single day in the month, including weekends. For November, you would divide the $5,000 salary by 30 calendar days.
- Daily Rate: $5,000 ÷ 30 = $166.67 per day.
- Pros: The math is simpler.
- Cons: When paying the employee, you must also count the weekends they were employed as "days worked," even if they were not in the office.
You must pick one method and apply it consistently to all employees to avoid wage disputes.
How to Calculate Partial Month Salary (Bi-Weekly)
If your company pays every two weeks (bi-weekly), the math is slightly different. You do not look at the month; you only look at the 14-day pay cycle.
To learn how to calculate partial month salary on a bi-weekly schedule, you divide the annual salary by 26 to get the standard paycheck. Then, divide that paycheck by 14 (if using calendar days) or 10 (if using working days) to get the daily rate.
*Note: If you have hourly workers instead of salaried workers, you do not need to prorate anything. You simply multiply their hours worked by their hourly rate. Use a standard time card calculator for those employees.*
Frequently Asked Questions
How to calculate prorated salary?
To calculate a prorated salary, divide the employee's standard pay for the period by the total number of days in that period. This gives you their exact daily rate. Then, multiply that daily rate by the number of days they actually worked.
Is prorated pay legal?
Yes. Employers are only legally required to pay salaried employees for the actual time they are employed. Prorating the first or last paycheck of an employee is standard practice across the United States.
What is the 260-day rule?
The 260-day rule is a shortcut for finding a salaried employee's daily rate. A standard year has 52 weeks. If an employee works 5 days a week, 52 × 5 equals 260 working days a year. Some HR departments simply divide the annual salary by 260 to get a permanent daily rate, rather than recalculating the days every single month.
Content and payroll calculations reviewed by the Pay & Time Hub review process. References Fair Labor Standards Act (FLSA) guidelines.