How to Calculate How Much PTO You Have Left This Year

You want to plan a vacation. You need to know how many PTO days you'll have available by then. Your HR portal shows a balance — but is it accurate? Does it account for time you've already requested?

Here's how to calculate your PTO balance yourself.

Step 1: Know Your Accrual Rate

If you have an accrual-based policy, find your annual PTO allowance and divide by your pay periods:

• Weekly pay (52 periods): Annual PTO ÷ 52
• Biweekly pay (26 periods): Annual PTO ÷ 26
• Semimonthly pay (24 periods): Annual PTO ÷ 24
• Monthly pay (12 periods): Annual PTO ÷ 12

Example: 120 hours annual PTO, biweekly pay:

120 ÷ 26 = 4.615 hours per pay period

Step 2: Calculate Accrued PTO to Date

Count the number of pay periods that have passed since your PTO reset (usually January 1 or your work anniversary).

Example: You started the year with 0 balance (accrual policy), it's now June 13, and you're paid biweekly. That's approximately 12 pay periods.

Accrued to date: 12 × 4.615 = 55.38 hours ≈ 6.9 days

Step 3: Subtract Time Already Used or Scheduled

From your accrued balance, subtract:

• PTO already taken this year
• PTO already approved and scheduled

Example: You took 3 days in March and have 2 days approved for July.

6.9 days accrued - 3 days taken - 2 days scheduled = 1.9 days currently free

Step 4: Add Future Accruals

If you're planning ahead, add the PTO you'll earn between now and when you want to take time off.

Example: Your vacation is in October, 9 pay periods away.

Future accrual: 9 × 4.615 = 41.5 hours ≈ 5.2 days

Total available by October: 1.9 + 5.2 = 7.1 days

Step 5: Account for Carryover (If Applicable)

If you had PTO carried over from last year, add that to your starting balance. Most HR systems include this, but it's worth verifying.

Common Mistakes in PTO Calculations

Forgetting about approved-but-not-taken time: Your balance might show 8 days, but if 3 are already approved for a future date, you only have 5 available for new requests.

Not accounting for partial days: Many systems track in hours. A 6-hour workday used as PTO counts as 6 hours, not 8 — leaving you 2 PTO hours you didn't spend.

Ignoring the accrual cutoff: Some policies stop accruing once you hit a cap (e.g., 1.5× your annual allowance). If you're at the cap, you're not earning more until you use some.

End-of-year timing: If your policy is use-it-or-lose-it, plan carefully in November and December. Unused days that expire represent real monetary value lost.

Track your exact PTO balance with our PTO Calculator — enter your accrual rate and see your running balance.