Pay Frequency Explained: Weekly, Biweekly, Semimonthly and Monthly

Pay frequency is simply how often payday comes around. The four common schedules are weekly (52 paydays a year), biweekly (every other week, 26 paydays), semimonthly (twice a month, 24 paydays) and monthly (12 paydays). The choice changes the size of each paycheck, how overtime and hours line up with pay periods, and how much payroll work you do each year. It does not, by itself, change how much tax an employee owes for the year.

The four schedules at a glance

Weekly: 52 paydays

Employees are paid every week, usually on the same weekday. Weekly pay is common for hourly work and industries where workers expect quick pay, such as construction and hospitality. Each pay period lines up exactly with one workweek, so overtime is easy to calculate. The trade-off is the most payroll runs of any schedule.

Biweekly: 26 paydays

Employees are paid every other week on the same weekday. This is one of the most common schedules in the US. Each pay period covers exactly two workweeks, so overtime is still straightforward. Because 26 paydays do not divide evenly into 12 months, two months of a typical year have three paydays instead of two.

Semimonthly: 24 paydays

Employees are paid twice a month on fixed dates, such as the 15th and the last day of the month. Paychecks are the same size for salaried staff, and payday aligns with monthly bills. The catch: pay periods do not line up with workweeks, and the number of workdays in each period varies.

Monthly: 12 paydays

Employees are paid once a month. It is the least administrative work, but it means a long wait between paychecks, and many states restrict monthly pay for most employees.

How frequency changes each paycheck

Take an employee with a salary of $52,000 a year. Gross pay per period works out to:

• Weekly: $52,000 ÷ 52 = $1,000.00
• Biweekly: $52,000 ÷ 26 = $2,000.00
• Semimonthly: $52,000 ÷ 24 = $2,166.67
• Monthly: $52,000 ÷ 12 = $4,333.33

Note that biweekly and semimonthly are not the same. A biweekly check is smaller than a semimonthly one, but there are two more of them each year. Mixing the two up is one of the most common setup errors on a salaried employee's stub.

Hourly employees

For hourly staff, gross pay is hours worked in the period times the rate, plus any overtime. Frequency changes how many hours fall into each check, not the hourly rate.

How frequency affects withholding

Federal income tax withholding is designed to come out about the same over a full year regardless of schedule. The IRS percentage method in Publication 15-T annualizes each paycheck: it multiplies taxable wages for the period by the number of pay periods per year (52, 26, 24 or 12), applies the annual tax tables, then divides the result back by the number of periods.

That is why the pay frequency setting matters so much. If a biweekly paycheck is processed as if it were monthly, the system annualizes $2,000 as $24,000 instead of $52,000, and withholding comes out far too low. The reverse mistake withholds far too much.

Other points to keep in mind:

• Social Security and Medicare are flat percentages of each check, so frequency only changes the size of each deduction, not the annual total. The annual Social Security wage base still applies on a year-to-date basis.
• Extra withholding an employee enters in Step 4(c) of Form W-4 is a per-paycheck amount. $50 per paycheck is $2,600 a year on a weekly schedule but $600 a year on a monthly one.
• Per-paycheck deductions, such as health premiums, need to be set for the schedule. A monthly premium split across a biweekly payroll needs a plan for the months with three paydays.
• State withholding follows each state's own method, which also depends on frequency.

Overtime and pay periods

Under the Fair Labor Standards Act, overtime is figured per workweek, a fixed and recurring period of seven consecutive 24-hour days, and hours may not be averaged over two or more weeks (DOL Fact Sheet #23). Weekly and biweekly schedules fit this naturally. With semimonthly or monthly pay, a workweek can straddle two pay periods, so you have to track hours by workweek and pay overtime in the right check. The DOL notes that overtime is generally due on the regular payday for the period in which it was earned.

State payday rules

There is no federal rule on pay frequency, but most states set a minimum. Some require at least semimonthly pay for most employees, some allow monthly pay only for certain salaried roles, and the rules can differ by industry. The U.S. Department of Labor keeps a summary table of state payday requirements; confirm the current rules with your state labor agency before you commit to a schedule. Our state pages are a good starting point.

27 paydays in a year: the biweekly surprise

A year is 52 weeks plus one day (two in a leap year). Over time, those extra days add up, and a weekly or biweekly schedule occasionally ends up with an extra payday in a calendar year: 53 weekly paydays or 27 biweekly ones. For hourly staff this is just another paycheck. For salaried staff, decide in advance whether you divide the salary by 27 that year or keep the usual amount and pay slightly more in total, and make sure benefit deductions are set correctly for the extra check.

How to choose a schedule

• Mostly hourly staff with overtime? Weekly or biweekly keeps overtime simple.
• Mostly salaried staff? Semimonthly gives equal checks aligned with monthly bills.
• Want fewer payroll runs? Biweekly is a common middle ground.
• Different groups? You can run more than one schedule, for example weekly for hourly staff and semimonthly for salaried staff, as long as each complies with state law.

Whatever you choose, keep it consistent. Changing schedules mid-year is possible but needs a transition plan, clear notice to employees and careful YTD tracking.

Set up pay schedules once, then run payroll on time

When you create a pay stub on PayStubNest, you pick the pay frequency and the payroll engine calculates withholding for that schedule. On the Payroll plan, you can save pay schedules for each group of employees and run each payday as a pay run. Learn more in our guides and FAQ.