Biweekly repeats every fourteen days. Semimonthly pays twice each calendar month. They are different schedules even when both feel like twice-monthly pay.
Compare the dates
A biweekly Friday schedule remains on Friday and moves through calendar dates. A semimonthly 15th-and-last-day schedule follows numbered dates that may land on different weekdays. Holiday adjustment is a separate employer rule.
Compare the counts
Semimonthly produces 24 planned pay dates per year. Biweekly commonly produces 26 and can produce 27 depending on the year and anchor. Use a generated calendar instead of hardcoding a count.
Do not infer pay-period boundaries
The payday does not reveal the start and end of the earning period. Payroll may be paid in arrears. Keep the pay-period calendar and deposit-date calendar separate when reconciling hours.
Try it with your numbers
Generate weekly, biweekly, semimonthly or monthly pay dates for a selected year.
How do the checks compare for the same annual amount?
A hypothetical $62,400 annual amount divided by 26 is $2,400; divided by 24 it is $2,600. That comparison excludes deductions, variable pay and the employer’s treatment of 27-payday years.
Does semimonthly always mean every two weeks?
No. The gaps between fixed monthly dates vary with the month. A 14-day recurrence is specifically biweekly.
Can I identify pay frequency from two paychecks in one month?
No. Both schedules commonly produce two payments in a month. Check whether dates repeat every 14 days or follow two fixed positions within each month.
For a $62,400 annual salary, the normal biweekly gross is $62,400 ÷ 26 = $2,400. The semimonthly gross is $62,400 ÷ 24 = $2,600. The semimonthly check is larger because there are fewer checks; the annual gross is still $62,400 before variable pay and deductions.
Hourly payroll is different. A semimonthly period can contain different numbers of workdays, so multiplying an hourly rate by a fixed 86.67-hour average may not reproduce the timecard. Use actual payable hours for the employer's period.
Payroll and PTO checks before switching frequency
Map pay-period start and end dates separately from deposit dates.
Confirm how deductions are spread across 24 or 26 checks.
Confirm whether PTO posts per paycheck, per eligible hour or on another schedule.
Test holidays, weekends and the year-end boundary with a generated calendar.
Questions people ask about pay frequency
Is it better to be semimonthly or biweekly?
Neither is universally better. Biweekly provides a consistent weekday and two three-paycheck months in a typical year. Semimonthly provides two paydays each month and larger regular salaried checks.
Is every two weeks biweekly or semimonthly?
Every 14 days is biweekly. Semimonthly means twice in each calendar month, so the gap between paydays varies.
How many pay periods are semimonthly?
There are 24 semimonthly pay periods in a normal year: two in each of 12 months.
Are bimonthly and semimonthly the same?
Bimonthly can be ambiguous. In payroll, use semimonthly for twice per month and biweekly for every two weeks.
Check a Payroll Calendar Before Sharing It — Validate the frequency, anchor date and exception rules before sharing a payroll calendar. A repeating date generator cannot know your employer's payment policy.
Three-Paycheck Months in 2027: Find Yours from a Known Payday — Your three-paycheck months in 2027 depend on the biweekly cycle, not just the year. An unadjusted Friday cycle anchored on January 8 has three paydays in April and October. A cycle anchored on January 1 has three in January, July and December, with 27 dates in the year. Employer date adjustments can change the calendar.