Biweekly vs Semi-Monthly Pay (2026)

Biweekly pay means a paycheck every two weeks, 26 times a year, each covering 80 standard hours. Semi-monthly pay means two paychecks a month on fixed dates, 24 times a year, each covering an average of 86.67 standard hours. The schedules sound close but behave differently for hourly workers, mainly because overtime is calculated per workweek and a semi-monthly period does not line up with workweeks.

The numbers side by side

Both schedules pay 2,080 standard hours a year for a 40-hour worker. 2,080 ÷ 26 is 80. 2,080 ÷ 24 is 86.67. The annual total is the same; only the slicing differs.

Biweekly: two workweeks per check

A biweekly period is 14 days, and if the employer's workweek start matches the period start, every check covers exactly two full workweeks. For an hourly worker that is the simplest arrangement there is. Overtime for week one and week two is calculated separately and both appear on the same stub.

A worker at $20 an hour who works 46 hours in week one and 38 in week two gets:

• Week one: 40 × $20 = $800 plus 6 × $30 = $180, so $980.
• Week two: 38 × $20 = $760, no overtime.
• Gross for the check: $1,740.

The two weeks total 84 hours, but overtime is 6 hours, not 4. Weeks are never averaged, and a system that pays overtime on hours over 80 in the period is underpaying anyone whose hours are uneven.

Biweekly schedules produce 26 paydays in most years, which is two more than the 24 you would get from paying twice a month. Those two extra checks land in two "three-paycheck months." Which months they are depends on your first payday in January. Many people treat the third check as a bonus, but it is simply the same annual pay arriving on a different calendar.

Semi-monthly: fixed dates that cut across weeks

A semi-monthly schedule pays on fixed dates, usually the 1st and 16th or the 15th and the last day of the month. Periods run 13 to 16 days depending on the month, and they almost never start on the first day of a workweek.

That creates the question hourly workers ask most: what happens to a workweek that starts in one period and ends in the next? Under federal law the workweek is still the unit for overtime. Employers generally handle it one of two ways:

1. Pay the hours worked in the period at straight time, then settle the overtime for the straddling week on the next check once the week is complete.
2. Estimate the week's overtime on the first check and true it up on the second.

Either way, the overtime from a split week may show up a period late. The hours on each check will also vary: a 16-day period in March will carry more hours than a 13-day period in February. If you see 86.67 hours on a semi-monthly stub, that is the salaried average, not an hourly count. Hourly workers should see actual hours.

Semi-monthly is popular with employers because it aligns with monthly accounting and benefits deductions. It is less convenient for hourly workers, because every check needs a careful look at which days and which workweeks it contains.

Budgeting on each schedule

Biweekly checks are the same size for a steady 40-hour week, but paydays drift relative to bills. Rent due on the 1st will sometimes be a day after a check and sometimes nearly two weeks after. The two three-check months offset that over the year.

Semi-monthly checks arrive on the same dates every month, which matches most bills, but for an hourly worker their size varies with the length of the period. A 13-day period can be noticeably lighter than a 16-day one.

Finding your workweek

Whichever schedule you are on, the workweek is what overtime depends on, and you need to know when it starts. Employers must set a fixed and regularly recurring workweek and keep it on record. Look in the handbook, on the time clock system, and on the stub where period dates appear. If it is not stated, ask payroll in writing. A workweek that starts on Thursday at 6 AM changes which hours count toward which week, and that can move hours into or out of overtime.

A quick check for either schedule

1. Write down your employer's workweek start day.
2. List the shifts on the stub by date and group them into workweeks, not pay periods.
3. Total each workweek. Hours over 40 are overtime.
4. For a week split across two checks, add both checks' hours for that week before judging the overtime.
5. Compare the overtime hours you calculated with the overtime hours on the stubs.

If the overtime hours on the stub match the hours over 80 in a biweekly period or over 86.67 in a semi-monthly one, rather than hours over 40 in each week, raise it with payroll. Keep your own dated record of punches; it is the evidence that resolves the question.