Two people can earn the exact same annual salary and still see different numbers on their individual paychecks — because how often you’re paid changes the math, even when the yearly total doesn’t.
The two schedules
Biweekly means every two weeks, on a fixed weekday — every other Friday, for example. Since a year has 52 weeks, that works out to 26 paychecks a year.
Semimonthly means twice a month, typically on fixed calendar dates like the 1st and the 15th. That’s 24 paychecks a year — two months short of biweekly’s count, even though both sound like “twice a month” at first glance.
Why the per-paycheck amount differs
A $75,000 salary paid biweekly: $75,000 ÷ 26 = $2,884.62 per paycheck.
The same $75,000 salary paid semimonthly: $75,000 ÷ 24 = $3,125.00 per paycheck.
Same annual salary, same annual take-home pay overall — but the semimonthly paycheck looks noticeably bigger per period, simply because there are fewer of them. See Gross Pay vs. Net Pay if “same annual total” itself needs unpacking.
The “extra paycheck” month
Because 26 biweekly pay periods don’t divide evenly into 12 calendar months, two months out of the year end up with three paychecks instead of the usual two — an artifact of the schedule, not extra money. It’s worth planning around if you budget month-to-month rather than paycheck-to-paycheck, since those months look different from the rest without your salary actually changing.
Semimonthly schedules don’t have this quirk — 24 paychecks divides evenly into 12 months, two per month, every month, all year.
Which one is “better”?
Neither — they pay the same annual total for the same annual salary. The difference is purely about cash-flow timing and budgeting rhythm, not about how much you’re actually paid over a year. Your employer sets the schedule; it’s not something you typically choose.
Want to see both schedules applied to your own salary? The Paycheck Calculator supports weekly, biweekly, semimonthly, monthly, and annual pay frequencies — switch between them to see the per-paycheck difference directly.