Biweekly vs. semimonthly pay
The two schedules sound similar, but their timing and number of normal pay periods are different.
Biweekly pay normally arrives every two weeks. Semimonthly pay normally arrives twice each month. That difference affects the number of regular pay periods, the spacing between paydays, and the amount of an equal annual salary allocated to each period.
| Feature | Biweekly | Semimonthly |
|---|---|---|
| Typical frequency | Every 14 days | Twice per month |
| Typical periods per year | 26 | 24 |
| Payday spacing | Consistent weekday interval | Calendar dates; interval varies |
| Some months | May contain 3 paydays | Normally 2 paydays |
| Hourly schedule alignment | Often maps cleanly to two workweeks | May split a workweek at a period boundary |
Why the paycheck amount differs for the same salary
When an annual salary is distributed evenly, a schedule with 26 periods divides the annual amount into more checks than a schedule with 24. Each normal biweekly check is therefore smaller than each normal semimonthly check, even though the annual gross salary can be the same.
Example: a $62,400 annual salary
Across 26 biweekly periods, the gross allocation is $2,400 per period. Across 24 semimonthly periods, it is $2,600 per period. The difference reflects pay frequency, not a different annual salary.
Why hourly pay needs the actual hours
For an hourly worker, a biweekly check is not simply annual pay divided by 26 unless annual earnings are already known and stable. Use the hours from each of the two workweeks, keep overtime treatment separate by week where required, and add other earnings afterward. Semimonthly hourly payroll can cover a changing number of workdays, so the actual period dates matter.
Three-paycheck months
A 14-day cycle produces 26 normal paydays in most years, so two calendar months will commonly contain three paydays. This does not create an extra annual salary payment when the salary has already been allocated across 26 periods; it changes the monthly cash-flow pattern. Deductions may also be handled differently on those checks, depending on the plan and payroll setup.
Partial periods and first checks
A first or final paycheck may cover fewer days than a normal period. Do not use a normal biweekly or semimonthly amount as the expected result until you know the covered dates, the employer's proration method, and whether unpaid time or delayed earnings are involved. Compare the pay stub's period dates with the payroll calendar before treating a difference as an error.
How to compare an offer or paycheck
- Identify whether the quoted amount is hourly, per pay period, monthly, or annual.
- Confirm the stated number of pay periods.
- For hourly work, use the actual regular and premium hours in each workweek.
- Compare gross pay before using deductions to judge the conversion.
- Check the payroll calendar for partial periods, holidays, and first or final checks.
Use the Biweekly Pay Calculator for a two-week gross estimate and the Salary to Hourly Calculator to compare annual, weekly, and hourly equivalents. The IRS Publication 15 is an official U.S. employer tax guide; payroll withholding is outside the scope of these gross-pay calculators.