Prorated Salary Calculator
Turn an annual salary into pay for a partial month or pay period. Enter the salary in dollars, pick a day-count convention (260 working days or 365 calendar days per year), and set the days worked — you get the prorated amount, the daily rate, and how it compares with a full paycheck.
Example: with Annual salary ($) 60000 · Day-count convention Working days (260/yr, Mon–Fri) · Days worked in the period 11 · Pay period (for comparison) Monthly (12/yr) → Prorated pay: $2,538.46.
- Daily rate$230.77 per working day
- Full pay for that period$5,000.00 monthly
- Share of a full check50.8% of a full monthly check
Computed by the calculator below using its default values. Change any input to see your own numbers.
Prorated pay = annual salary ÷ days per year (260 working or 365 calendar) × days worked. HR teams use both conventions — ask which one your employer applies.
When salaries get prorated
A prorated salary shows up whenever someone is paid for less than a full period: starting mid-month, leaving before payday, taking unpaid leave, or moving between full- and part-time. Payroll converts the annual salary to a daily rate, then pays that rate for each day actually worked. The math is simple; the disagreements come from what counts as a day.
The working-day convention divides the salary by 260 (52 weeks of five weekdays), so each workday is worth more. The calendar-day convention divides by 365 and pays for every day on the calendar, weekends included. On the same $60,000 salary, a working day is $230.77 while a calendar day is $164.38 — an 11-day stretch differs by more than $700 between conventions.
Getting the day count right
Count only the days the convention pays for. Under working days, count the weekdays you were employed and scheduled, including paid holidays your employer observes; skip weekends. Under calendar days, count every day from start date through end date, inclusive. Some payroll systems prorate by the actual workdays in that specific month — 20 to 23 depending on the calendar — which lands within a few percent of the 260-day answer but rarely matches it to the penny.
How it’s calculated
Prorated pay = (annual salary ÷ days per year) × days worked. The working-day convention uses 260 days per year (52 weeks × 5 weekdays); the calendar-day convention uses 365. Daily rate = annual salary ÷ days per year. Full-period pay = annual salary ÷ pay periods per year (12 monthly, 24 semi-monthly, 26 biweekly, 52 weekly). Share of a full check = prorated pay ÷ full-period pay × 100.
Gross pay only, before taxes and deductions; some payrolls prorate by the actual working days in the specific month (20–23) rather than a fixed 260-day year, which shifts the result a few percent — confirm the convention with your HR team.
Daily rate on a $60,000 salary under each convention
| Convention | Daily rate | Pay for 11 days |
|---|---|---|
| Working days (260/yr) | $230.77 | $2,538.46 |
| Calendar days (365/yr) | $164.38 | $1,808.22 |
| Workdays in the month (22) | $227.27 | $2,500.00 |
Computed with prorated pay = salary ÷ days per year × days worked on a $60,000 salary; the month-specific row divides the $5,000 monthly salary by 22 workdays.
Common mistakes
- Mixing conventions — dividing by 365 but counting only weekdays worked understates the check by about a third.
- Forgetting that semi-monthly periods contain a varying number of workdays (10–12), so the same half month can prorate differently.
- Prorating net (take-home) pay instead of gross — withholding is not linear, so prorate gross and let payroll recompute taxes.
- Counting unpaid company holidays as days worked when your employer's policy pays only scheduled workdays.
Frequently asked questions
What is the prorated salary formula?
Prorated pay = (annual salary ÷ days per year) × days worked. With the working-day convention, days per year is 260 (52 weeks × 5); with the calendar-day convention it is 365. A $60,000 salary is $230.77 per working day, so 11 days pays $2,538.46.
Which day-count convention should I use?
Whichever your employer's payroll uses. Working days (260) is the most common for salaried employees in the US; some systems use 365 calendar days or the exact workdays in that month. The convention can change the result by 25% or more, so ask HR.
How do I prorate a first paycheck when I start mid-month?
Count your workdays from the start date through the end of the pay period, multiply by the daily rate, and that is your gross for the period. If you start on the 18th and 10 workdays remain in the month, you get 10 × the daily rate.
Is prorated pay calculated before or after taxes?
Before. Proration applies to gross salary; payroll then withholds income tax, Social Security, and Medicare on the prorated amount, so your net is not a simple fraction of a normal check.
Do paid holidays and PTO count as days worked?
Yes — any day your employer pays you for counts toward the proration. Only unpaid days (unpaid leave, days before your start date, days after termination) are excluded.