PTO Accrual Calculator
Track your earned paid time off balance after factoring in hours worked, PTO used, and your employer's accrual cap. Useful at the end of any pay period to confirm your available leave.
About this calculator
Most employers award PTO incrementally as hours are worked rather than granting a lump sum at the start of the year. The accrual rate defines how many PTO hours you earn per hour worked — for example, 0.04615 hours of PTO per hour worked yields roughly 10 days per year for a full-time employee. The new balance is calculated as: New Balance = min(maxAccrual, currentBalance + (hoursWorked × accrualRate) − ptoUsed). The min() function enforces the employer's accrual cap, preventing the balance from exceeding the maximum allowed. If the result hits the cap, additional accrual stops until PTO is used. This design encourages employees to take leave regularly and gives employers predictable liability on their books.
How to use
Say your current PTO balance is 24 hours, your accrual rate is 0.05 hours per hour worked, your company cap is 80 hours, and you worked 80 hours this pay period while using 8 hours of PTO. Step 1 — Accrued PTO: 80 × 0.05 = 4 hours earned. Step 2 — New balance before cap: 24 + 4 − 8 = 20 hours. Step 3 — Apply cap: min(80, 20) = 20 hours. Your available PTO balance at period end is 20 hours, well below the cap, so accrual continues normally next period.
Frequently asked questions
How do I calculate my PTO accrual rate from my annual PTO allowance?
Divide your total annual PTO hours by the total hours you work in a year. A standard full-time schedule is 2,080 hours per year (52 weeks × 40 hours). If your employer grants 80 hours (10 days) of PTO annually, your accrual rate is 80 / 2,080 ≈ 0.03846 hours of PTO per hour worked. For 15 days (120 hours), the rate is 120 / 2,080 ≈ 0.05769. Enter this rate into the Accrual Rate field and the calculator handles the rest.
What happens to my PTO balance when I reach the maximum accrual cap?
Once your balance hits the employer's maximum accrual limit, you stop earning new PTO until you use some leave and drop below the cap. This is sometimes called a 'use-it-or-lose-it' trigger, though policies vary — some employers allow balances to sit at the cap indefinitely, while others mandate that excess hours are forfeited at year end. The calculator reflects this by applying the min() function, so if your computed balance would exceed the cap, it is automatically clamped to the maximum.
Why do some companies use a PTO accrual system instead of frontloading vacation days?
Accrual systems reduce financial liability for employers because they only 'owe' PTO that has actually been earned. If an employee receives 15 days upfront in January and resigns in February, the company may need to pay out unused days depending on state law. With accrual, the earned balance is smaller early in the year, limiting that exposure. For employees, accrual systems reward tenure and encourage longer stays, since higher earners accumulate PTO faster at many companies.