Understanding PTO Accrual Methods
An accrual system deposits a fraction of an employee's total annual leave into their "PTO bank" over time. The two most common methods are accruing by pay period (a fixed amount deposited every paycheck) and accruing by hour worked (a variable amount based on timesheets).
Setting up the right calculation depends on your company's payroll frequency—such as weekly, bi-weekly, semi-monthly, or monthly—and whether the employees are salaried or hourly.
How to Calculate PTO per Pay Period
To find the accrual rate per pay period, you must divide the total number of PTO hours an employee is entitled to per year by the total number of pay periods in that year.
Formula: Accrual Rate = Total Annual PTO Hours / Number of Pay Periods
Worked Example: An employee is granted 120 hours of PTO per year and is paid bi-weekly (26 pay periods in a year). Calculation: 120 / 26 = 4.615 hours. The employee earns 4.615 hours of PTO on every paycheck.
How to Calculate Hourly PTO Accrual
For part-time or hourly workers with fluctuating schedules, it is often fairer to calculate PTO based strictly on the hours they work. This requires knowing the standard annual working hours (typically 2,080 hours for a 40-hour week).
Formula: Hourly Accrual Multiplier = Total Annual PTO Hours / Standard Annual Working Hours
Worked Example: If the annual grant is 80 hours for a full-time equivalent (2,080 hours), the multiplier is 80 / 2080 = 0.03846. If an employee works 30 hours in a week, they accrue: 30 × 0.03846 = 1.15 hours of PTO for that week.
Managing Caps and Carryover Limits
To prevent massive liabilities, employers often implement accrual caps (a maximum amount of PTO an employee can hold at any one time) and carryover limits (a maximum amount of unused PTO that can roll into the next calendar year).
For example, a company might grant 120 hours annually but cap the maximum balance at 160 hours. Once the balance hits 160, the employee stops accruing new time until they take a vacation. It is vital to clearly document these rules in the employee handbook.
Frequently asked questions
How many pay periods are in a year?
Weekly is 52 periods. Bi-weekly (every two weeks) is 26 periods. Semi-monthly (twice a month) is 24 periods. Monthly is 12 periods.
What happens to accrued PTO when an employee quits?
This heavily depends on local labor laws. Many jurisdictions consider accrued PTO to be earned wages, meaning the employer must pay out the unused balance upon termination.
Do employees accrue PTO while on leave?
Company policies differ, but generally, employees do not accrue additional PTO while they are on unpaid leave. Some companies allow accruals while the employee is actively using paid leave.
Can an employer change the PTO accrual rate?
Yes, employers can typically change future accrual policies with proper notice, but they usually cannot retroactively take away PTO that an employee has already accrued.