PTO Accrual Calculator

Almost every payroll system tracks paid time off in hours rather than days, which can feel like unnecessary precision to a salaried employee who thinks in whole days off. The reason is that "a day" is not a fixed quantity across a workforce: a part-time employee working six-hour days and a full-timer working eight-hour days cannot share a days-based accrual system without one of them being shortchanged. Hours are the common unit that scales correctly across every schedule.

It also makes partial days straightforward. Taking a half day, leaving three hours early, or a four-hour medical appointment are all natural in an hours-based system and awkward in a days-based one.

Employers use several structures, and which one applies changes how quickly time becomes available.

Many plans limit how large a balance can grow. A carryover cap restricts how much rolls into the next year; an accrual cap (sometimes called a ceiling or a maximum balance) stops accrual entirely once a threshold is reached, and does not resume until the balance drops. The second is the one that quietly costs people time, because accrual simply stops rather than being deferred — hours that would have been earned are gone.

The legal position varies sharply by jurisdiction. Some places treat accrued PTO as earned wages that must be paid out when employment ends and prohibit use-it-or-lose-it forfeiture outright; others permit both, subject to notice. Because this is genuinely location-dependent, the only reliable sources are the employee handbook and local employment law.

A consolidated PTO bank merges vacation, sick and personal days into one pool the employee allocates as they choose. It is administratively simpler and gives more flexibility, but it has a known downside: employees tend to treat the whole balance as vacation and come to work sick rather than spend "holiday" on illness. Separate buckets avoid that but require the employer to adjudicate what counts as sick leave, and many jurisdictions now mandate a minimum quantity of specifically-designated sick leave regardless of what the general PTO policy says.