What Is a Pay Period? Types Explained (2026)

A pay period is the recurring length of time employees' work is tracked and paid for — the schedule your payroll runs on. Choosing the right one affects cash flow, overtime calculations, and how employees budget. This guide explains what a pay period is, the four main types, and how to pick.

What a pay period is

A pay period is the window of time a paycheck covers — a week, two weeks, half a month, or a month. At the end of each period, hours are totaled and wages are paid. The pay date (when money actually arrives) usually falls a few days after the period ends, to allow time for processing and approval.

The four main types

Weekly (52 paychecks/year). Paid every week, usually on the same weekday. Best for hourly and shift workers; more payroll runs but the simplest for overtime, since each period is one workweek.

Biweekly (26 paychecks/year). Paid every two weeks. The most common US schedule. Aligns to whole workweeks, so overtime is clean. Two months a year have three paychecks.

Semi-monthly (24 paychecks/year). Paid twice a month on fixed dates (e.g., the 15th and last day). Fewer runs and steady monthly amounts, but periods split workweeks, complicating overtime.

Monthly (12 paychecks/year). Paid once a month. Fewest payroll runs, common for salaried staff, but a long gap between paychecks that employees must budget around.

Quick comparison

• Most paychecks: weekly (52)
• Most common: biweekly (26)
• Fewest runs, fixed dates: semi-monthly (24)
• Simplest to process: monthly (12)

How pay periods affect overtime

This is the detail people miss: overtime is calculated by workweek, not by pay period. Weekly and biweekly periods align to workweeks, so overtime is straightforward. Semi-monthly and monthly periods can split a workweek across two pay periods, so you must still calculate overtime on the full week. Getting this wrong is a common payroll error.

How to choose

• Hourly staff with overtime: weekly or biweekly, for clean overtime math.
• Mostly salaried: semi-monthly or monthly, for fewer runs.
• Cash-flow sensitive employees: more frequent periods help with budgeting.

Many companies run hourly staff biweekly and salaried staff semi-monthly for exactly these reasons.

Keep overtime correct on any schedule

Whatever pay period you run, overtime lives at the workweek level. Timesheet Maker tracks hours by workweek regardless of your pay period, so overtime is calculated correctly even when a semi-monthly or monthly period splits a week — and exports line up with your payroll schedule.

Frequently asked questions

What is a pay period? The recurring span of time a paycheck covers — weekly, biweekly, semi-monthly, or monthly — after which hours are totaled and wages paid.

What's the difference between biweekly and semi-monthly? Biweekly is every two weeks (26 paychecks); semi-monthly is twice a month on fixed dates (24 paychecks). Biweekly aligns to workweeks; semi-monthly doesn't.

Which pay period is most common? Biweekly is the most common schedule in the US, followed by weekly and semi-monthly.

How does the pay period affect overtime? It shouldn't change the overtime owed — overtime is based on the workweek. But semi-monthly and monthly periods can split workweeks, so you must still calculate overtime per week.

Pick the right schedule

Match the pay period to your workforce and keep overtime at the workweek level. To keep hours accurate on any schedule, try Timesheet Maker free.