Direct answer
Multiply the annual vacation allowance by the portion of the year worked, then convert to hours if your PTO balance is tracked in hours.
Use this working rule: Prorated vacation = annual vacation allowance x eligible period ÷ full year.
Open PTO CalculatorExample with numbers
If the annual allowance is 120 PTO hours and you worked 6 of 12 months, the prorated amount is 60 PTO hours.
Annual PTO: 120 hours; eligible period: 6/12 year; prorated PTO: 60 hours.
Comparison table
| Input | What to do | Result |
|---|---|---|
| Known number | Prorated vacation = annual vacation allowance x eligible period ÷ full year. | If the annual allowance is 120 PTO hours and you worked 6 of 12 months, the prorated amount is 60 PTO hours. |
| Calculator check | Enter the same inputs in the related tool | Open PTO Calculator |
| Copyable note | Save the result with assumptions | Annual PTO: 120 hours; eligible period: 6/12 year; prorated PTO: 60 hours. |
Step-by-step check
Key checks
- Find the annual vacation or PTO allowance.
- Find the eligible portion of the year.
- Multiply the allowance by that fraction.
- Convert days to hours if needed.
- Compare the estimate with accrual rules and carryover limits.
When this gets tricky
Do not use calendar months if the policy prorates by pay period.
Do not ignore waiting periods.
Do not mix vacation days and PTO hours without a scheduled-hours assumption.
Copy this result format
Annual PTO: 120 hours; eligible period: 6/12 year; prorated PTO: 60 hours.
Keep the inputs visible. That makes the answer easier to reuse in a timesheet note, payroll message, PTO request, or deadline explanation.
Related internal path
Related page: /guides/how-to-calculate-pto-hours-for-part-time-employees/
Related page: /guides/how-to-calculate-pto-after-switching-to-part-time/
Open PTO Calculator