Work, pay & shifts
How to Prorate a Paycheck
Prorating means paying only the share of a fixed amount that matches the part of the period you were eligible for — because you started mid-period, left before it ended, or had unpaid days. The standard method is a single ratio. This guide sets out the formula, works through examples by days and by hours, and explains how rounding to the cent is handled.
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The formula
Prorated pay = full-period pay × units to pay ÷ units in the full period.
- Units are days or hours, whichever your employer uses to measure the period.
- Count both the same way: working days with working days, calendar days with calendar days, scheduled hours with scheduled hours.
By working days
- Full biweekly pay: $2,000.00, over 10 working days.
- Days to pay: 6.
- Proration: 6 ÷ 10 = 60%.
- Prorated pay: $2,000.00 × 60% = $1,200.00. The $800.00 difference is left out.
By hours
A $3,000.00 period based on 80 scheduled hours, with 52.5 hours to pay: 52.5 ÷ 80 = 65.625%, so the prorated pay is $1,968.75.
More examples
| Full-period pay | Paid | Proration | Prorated pay |
|---|---|---|---|
| $2,000.00 | 6 of 10 days | 60% | $1,200.00 |
| $3,000.00 | 52.5 of 80 hours | 65.625% | $1,968.75 |
| $4,166.67 | 11 of 22 days | 50% | $2,083.34 |
| $2,500.00 | 7 of 22 days | 31.8182% | $795.45 |
Rounding to the cent
Most results aren’t whole cents: $2,500.00 × 7 ÷ 22 is $795.4545… Rounded to the cent, the prorated pay is $795.45, and the amount left out is $2,500.00 − $795.45 = $1,704.55, so the two still add up to the full period. Halfway cases round up: half of $4,166.67 is $2,083.335, which becomes $2,083.34.
How to Prorate Pay FAQ
- What does it mean to prorate a paycheck?
- To pay only the share of a full period’s pay that matches the days or hours you were eligible for.
- How do I prorate pay by days?
- Multiply the full-period pay by the days to pay and divide by the days in the full period. 6 of 10 days of $2,000.00 is $1,200.00.
- Can I prorate by hours instead of days?
- Yes, when the period is measured in scheduled hours. 52.5 of 80 hours of $3,000.00 is $1,968.75.
- Do hourly workers get prorated pay?
- Usually not: they are paid for the hours they work. Proration applies to fixed amounts such as salaries or stipends.
- Why does my employer’s prorated figure differ?
- Employers use different methods — calendar days, working days, or a daily rate from an annual salary — and may round differently.
Related guides
- Calendar vs. Working DaysHow counting calendar days or working days changes prorated pay for the same absence or start date, and why month length matters.
- Starting or Leaving Mid-PeriodWorked examples of prorated pay for a first paycheck and a last paycheck, when proration applies, and what else a first or final check can include.
Open the tool
Jump into Pay Period Proration Calculator when you are ready to process your files.
