How to use this calculator
The PTO accrual calculator projects earned paid time off and a remaining balance using a simple accrual model. Choose whether PTO is earned per eligible hour worked or per completed pay period. Enter the opening balance, accrual rate, eligible hours or completed periods, and PTO used. An optional balance cap limits the amount available after accrual.
All balances and accrual amounts are measured in hours. In this model, accrual happens first, the cap applies second, and usage is subtracted last. If time off is taken between accrual events, or the employer uses changing rates, anniversary tiers, or annual carryover rules, break the projection into separate steps using the policy that actually applies.
Formula and calculation method
Earned PTO = accrual rate × eligible units. Projected balance = min(opening + earned, optional cap) − PTO used afterward.
Match the rate to the selected basis
A rate of 0.05 per eligible hour means five PTO hours per 100 eligible work hours. A rate of four per completed pay period means four PTO hours for each completed period. These units are not interchangeable. Switching the basis does not automatically convert the rate, so update both inputs together when changing the model.
Apply the cap in the stated sequence
The opening balance and earned amount are combined before the cap is applied. Any excess is reported separately, then the entered usage is deducted. This sequence is deliberately simple. A policy that stops accrual at the cap and restarts after leave may require a chronological calculation of individual events rather than one aggregate total.
Worked examples
Earn by hours worked
Start with 20 PTO hours, accrue 0.05 hours per eligible hour, and enter 80 eligible hours. Earned PTO is four hours. With eight hours used afterward and no cap, the projected balance is 20 + 4 − 8 = 16 hours. The usage is treated as occurring after the earning period.
Earn by completed periods
Start at zero, choose the pay-period basis, enter four PTO hours per period, and count six completed periods. Earned PTO is 24 hours. If none is used and there is no cap, the projected balance is 24 hours. Partial periods are not prorated automatically in this mode.
Reach a balance cap
An opening balance of 38 plus four earned hours reaches 42. With a cap of 40, two hours are removed by the cap. Subtracting eight hours of use afterward leaves 32. If the eight hours were used earlier, the result under a running-balance policy could be different.
Edge cases and practical checks
Eligible hours are a policy input
Not every paid hour necessarily earns PTO under every plan. Determine which work, leave, and holiday categories qualify before entering the eligible total. The calculator does not infer an employer’s plan from your location or translate a generic annual leave entitlement into an accrual rule automatically.
Negative balances and carryover
The tool rejects usage that exceeds the available balance under this model. It does not model borrowing future leave or automatically reset balances at year end. A carryover cap, annual earning limit, and maximum current balance are different concepts; the optional cap here is a balance cap applied before usage.
Frequently asked questions
How do I find my PTO accrual rate?
Use the rate specified in the applicable plan, with its matching unit. If a policy explicitly distributes an annual amount evenly across a stated number of periods, divide using that stated basis. Do not assume every plan uses 2,080 hours or 26 pay periods.
Can I accrue PTO by pay period?
Yes. Select per completed pay period, enter PTO hours earned per period, and enter a whole number of completed periods. The tool does not automatically prorate partial periods or check an employment start date against a payroll calendar.
Does the calculator include holidays in eligible hours?
Only if you include them in the eligible-hours input. Which hours qualify is a policy decision outside this arithmetic. Keep worked hours, paid leave, and holiday hours separate until you know which categories the plan includes.
Is a carryover limit the same as the balance cap?
No. A carryover limit applies at a policy boundary such as year end, while a balance cap limits an available balance. This calculator applies one balance cap after accrual and before usage. Model a carryover adjustment separately if required.
What if I take leave during the accrual period?
The aggregate model assumes the entered usage happens after all accrual. If ordering matters because a cap is reached, calculate each earning and usage interval separately. Carry the resulting balance into the next step so the timing is represented correctly.
Can I convert the result to days?
Divide the PTO hours by the number of hours your plan defines as a leave day. An eight-hour convention may fit one schedule but not another. Keep the hours result when shifts vary, or document the day-length assumption alongside the converted figure.
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