PTO Accrual Calculator
Estimate your updated PTO balance after working a given number of hours. Useful when verifying a paycheck stub or planning upcoming time off against a company accrual cap.
About this calculator
Most employers accrue PTO as a fixed rate of hours earned for every hour worked. The core formula is: New Balance = min(currentBalance + (hoursWorked × accrualRate) − hoursUsed, maxAccrual). The accrualRate is expressed in hours of PTO per hour worked — for example, a rate of 0.04615 yields roughly 2 weeks of PTO per year for a full-time employee. The maxAccrual cap prevents balances from growing indefinitely; once you hit that ceiling, no additional PTO accumulates until you use some. Subtracting hoursUsed accounts for any time off taken during the same period, giving you a real-time net balance. Understanding this formula helps you plan vacations without accidentally losing accrued hours to the cap.
How to use
Suppose you currently have 20 PTO hours banked, worked 80 hours this pay period, used 8 hours for a day off, your accrual rate is 0.05 hours per hour worked, and your company cap is 120 hours. Step 1 — Earned this period: 80 × 0.05 = 4 hours. Step 2 — Gross new balance: 20 + 4 − 8 = 16 hours. Step 3 — Apply cap: min(16, 120) = 16 hours. Your updated PTO balance is 16 hours. Because 16 is well below the 120-hour cap, you continue accruing normally next period.
Frequently asked questions
How is PTO accrual rate calculated per hour worked?
The accrual rate is determined by dividing the total PTO hours granted per year by the total hours worked per year. For a standard full-time employee working 2,080 hours a year who receives 80 hours (2 weeks) of PTO, the rate is 80 ÷ 2,080 ≈ 0.03846 hours of PTO per hour worked. Some employers express this as hours per pay period instead, so it is important to confirm whether your rate is per hour or per period. Always check your employee handbook for the exact figure used in payroll.
What happens to my PTO when I hit the maximum accrual cap?
Once your balance reaches the employer-set maximum, accrual stops entirely until you use some of your banked hours. This is often called a 'use-it-or-lose-it cap' or an accrual freeze. For example, if your cap is 120 hours and you currently hold 120 hours, working additional hours adds nothing to your balance. The best strategy is to schedule time off before approaching the cap so you do not forfeit potential PTO earnings. Some companies send automatic alerts when you are within a few hours of the ceiling.
Does PTO accrual work the same way for part-time employees?
Part-time employees typically accrue PTO using the same per-hour formula, but because they work fewer hours, they accumulate PTO more slowly than full-time staff. A part-time worker logging 20 hours per week at the same 0.03846 rate earns roughly half the annual PTO of a full-time counterpart. Some employers set a separate, lower accrual rate or a reduced cap for part-time roles, so the policy varies by company. It is essential to review your specific employment agreement rather than assuming the full-time rate applies.