PTO accrual is the process of earning paid time off over time. Depending on the employer’s policy, PTO may accrue each pay period, for every eligible hour worked, or on another schedule. The calculator above supports both pay-period and hours-worked methods and shows your estimated balance in hours and days.

How to use the PTO Accrual Calculator

1. Choose whether PTO accrues by pay period or by hours worked.
2. Enter the PTO allowance or accrual rate from your employer’s written policy.
3. Enter completed pay periods or eligible hours worked so far.
4. Add any starting or carryover balance and subtract PTO already used.
5. Enter future pay periods or future eligible hours to project your balance.
6. If your plan has a maximum balance cap, enter it so the projection does not exceed the stated limit.

The calculator then shows PTO earned so far, current estimated balance, future accrual, projected balance, and hours-to-days conversions.

PTO accrual formula by pay period

If your employer gives a fixed annual PTO allowance and accrues it evenly across payroll periods, the basic formula is:

PTO earned per pay period = Annual PTO hours ÷ Pay periods per year

Example: an employee receives 120 PTO hours per year and is paid biweekly:

120 ÷ 26 = 4.62 PTO hours per biweekly pay period

After 10 completed pay periods, the employee would have earned about 46.15 hours before considering carryover, PTO used, caps, waiting periods, or other plan rules.

If you are unsure whether your payroll is weekly, biweekly, semimonthly, or monthly, see What Is a Pay Period?.

PTO accrual formula based on hours worked

Some employers accrue PTO according to eligible hours actually worked. The basic formula is:

PTO earned = Eligible hours worked × PTO accrual rate

For example, if the accrual rate is 0.0577 PTO hours for every eligible hour worked and you work 80 eligible hours:

80 × 0.0577 = 4.62 PTO hours earned

Over 2,080 eligible hours, that rate is roughly 120 PTO hours. Your employer may exclude overtime hours, unpaid leave, certain paid absences, or other categories from the eligible-hours calculation, so use the plan’s definition rather than assuming every paid hour accrues PTO.

PTO balance formula

A simple PTO balance estimate is:

Current PTO balance = Starting or carryover balance + PTO earned − PTO used

If the employer has a maximum balance cap, the usable balance may stop increasing once that cap is reached. Some plans resume accrual after the employee uses enough PTO to fall below the cap; others use different rules.

PTO accrual by pay frequency

Using a 120-hour annual PTO allowance, equal accrual across common payroll schedules looks like this:

Pay frequency	Pay periods/year	PTO per pay period
Weekly	52	2.31 hours
Biweekly	26	4.62 hours
Semimonthly	24	5.00 hours
Monthly	12	10.00 hours

These examples assume a simple even accrual. An actual employer may use service tiers, waiting periods, partial-period proration, front-loading, rounding rules, or another schedule.

How to convert PTO hours to days

Use the number of hours in your normal workday:

PTO days = PTO hours ÷ Hours per workday

For an 8-hour workday, 40 PTO hours equals 5 days. If you normally work 10-hour shifts, the same 40 hours equals 4 workdays. This is why an hours-based balance is usually more precise than assuming every employee works an 8-hour day.

Accrued PTO vs available PTO

Accrued PTO is the amount earned under the plan’s accrual formula. Available PTO is the amount you can actually use after considering PTO already taken, waiting periods, negative-balance rules, caps, carryover, or other employer restrictions.

Those numbers can be different. An employee may have earned PTO that is not yet available because of a waiting period, or a payroll system may show an available balance that includes front-loaded time not technically earned through an accrual formula.

Front-loaded PTO vs accrued PTO

Under an accrual system, PTO builds over time as pay periods or eligible work hours are completed. Under a front-loaded system, an employer credits some or all of the annual PTO allowance at the start of the year, plan year, or eligibility period.

This calculator is designed for accrual-style plans. If your employer front-loads the full annual balance, enter that amount as a starting balance and use zero future accrual only if that matches the written policy.

PTO accrual caps and maximum balances

An accrual cap is a maximum PTO balance that can be held under the employer’s plan. For example, a 160-hour cap means the balance may stop increasing once it reaches 160 hours. The plan may restart accrual after the employee uses time and drops below the cap.

The calculator applies the cap to the displayed current and projected balances when you enter one. It does not attempt to model every employer’s stop-and-restart timing rule inside each intermediate pay period.

PTO carryover and rollover

Carryover or rollover is PTO that moves from one plan year into the next. Some employers allow the full unused balance to carry over, some impose a limit, and others use a different plan structure. State and local rules may also affect how certain vacation or PTO policies operate.

If you know the number of hours carried into the period, enter them as the starting/carryover balance in the calculator.

PTO accrual for part-time employees

Part-time PTO can be handled in several ways. An employer may use the same hours-worked accrual rate for everyone, provide a reduced annual allowance, prorate benefits based on scheduled hours, or exclude some part-time classifications from the plan.

If the policy accrues PTO per eligible hour worked, the hours-worked mode is usually the more natural calculator option. For broader context on part-time schedules and benefit eligibility, see How Many Hours Is a Part-Time Job?.

PTO accrual for new hires

New hires may begin accruing PTO immediately, after a waiting period, or on a prorated schedule for the rest of the year. If a new employee starts in the middle of a pay period, the employer may credit a full accrual, a partial accrual, or no accrual for that period depending on the written plan.

Do not assume an annual PTO allowance should always be divided by 12 or 26 and automatically prorated from the hire date. Use the employer’s actual eligibility and proration rules.

Will I have enough PTO by a future date?

The projection fields are designed for this question. If PTO accrues by pay period, enter how many additional qualifying pay periods will occur before your target date. If PTO accrues by hours worked, enter the additional eligible hours you expect to work before that date.

Compare the projected balance with the number of hours you need for the planned absence. Remember that future usage, caps, waiting periods, schedule changes, and unpaid time can change the real balance.

PTO accrual vs PTO payout

PTO accrual answers how much paid time off you have earned or may earn. PTO payout answers how much unused time may be worth in cash. They are related but different calculations.

Unused PTO may also appear alongside severance or final-pay discussions, but it is separate from severance itself. See the Severance Pay Calculator for severance estimates. A dedicated PTO payout calculator should use the employer’s payout policy and applicable state rules rather than assuming every unused hour must be cashed out.

PTO vs holiday pay

PTO is a general paid-leave balance that may cover vacation, personal time, sickness, or other approved absences depending on the employer’s plan. Holiday pay is compensation connected with a designated holiday and may involve paid time off, a premium for holiday work, or both.

For holiday-work premiums such as time-and-a-half or double time, use the Holiday Pay Calculator.

Is PTO required by federal law?

For most private-sector workers, the federal Fair Labor Standards Act does not generally require employers to provide paid vacation or general PTO. These benefits are commonly created by employer policy, employment agreements, or collective bargaining agreements. Other federal, state, or local leave laws may create separate paid or unpaid leave rights in particular situations.

For the federal baseline on vacation and personal leave benefits, see the U.S. Department of Labor guidance on personal leave.

Because state rules can affect vacation/PTO accrual, carryover, forfeiture, and payout, this calculator does not make a state-specific legal determination.

Common PTO accrual mistakes

• Using the wrong number of pay periods: Biweekly usually means 26 pay periods, while semimonthly usually means 24.
• Treating front-loaded PTO as accrued PTO: The timing and plan rules are different.
• Ignoring a balance cap: A theoretical accrual can exceed what the employer actually allows you to hold.
• Counting every paid hour as eligible: Some plans accrue only on specified worked or paid hours.
• Forgetting PTO already used: Accrued hours and available balance are not the same thing.
• Assuming unused PTO must always be paid out: Payout rules can depend on policy and applicable state law.

Frequently asked questions

How do I calculate PTO accrual?

For a pay-period plan, divide annual PTO hours by the number of accrual periods in the year. For an hours-worked plan, multiply eligible hours worked by the PTO accrual rate.

How much PTO accrues per biweekly paycheck?

If the annual allowance is 120 hours and it accrues evenly across 26 biweekly periods, the accrual is about 4.62 hours per paycheck. Use the employer’s actual schedule because some years or payroll systems can differ.

How many days is 40 hours of PTO?

At 8 hours per workday, 40 PTO hours equals 5 days. At 10 hours per workday, it equals 4 days.

How do I calculate PTO based on hours worked?

Multiply eligible hours worked by the employer’s PTO accrual rate. For example, 80 eligible hours × 0.0577 = about 4.62 PTO hours.

Does PTO accrue while I am using PTO?

It depends on the employer’s policy. Some plans accrue on paid hours that include PTO, while others accrue only on hours actually worked or other defined eligible hours.

Can PTO stop accruing at a cap?

Yes, if the employer’s plan has a maximum accrual or balance cap. The policy should explain when accrual stops and whether it resumes after the balance falls below the cap.

Is PTO the same as vacation time?

Sometimes. A combined PTO bank may cover vacation, personal time, and other approved absences, while another employer may keep vacation and sick leave in separate banks.

Calculate your PTO accrual

Use the calculator at the top of the page with the accrual method, pay frequency or eligible-hours rate, starting balance, PTO used, and any balance cap from your employer’s written policy. For the most reliable projection, use the same definitions and rounding rules your payroll or HR system uses.

This page provides general educational information and a planning estimate. It is not legal, tax, payroll, HR, or employment advice. PTO rules can vary by employer, jurisdiction, agreement, worker classification, and specific facts.