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Biweekly vs Semimonthly Pay: What's the Difference?

Updated September 2026 · 3 min read

The core difference

Biweekly: paid every 2 weeks = 26 paychecks/year. Semimonthly: paid twice a month (e.g., 1st & 15th) = 24 paychecks/year. Annual salary is identical — only the split differs.

The famous "third paycheck" months

On a biweekly schedule, two months per year have 3 paychecks instead of 2. Many people use these bonus paychecks for savings or debt payoff.

Biweekly (26)Semimonthly (24)
$52,000 salary$2,000/paycheck$2,166.67/paycheck

Which is better?

Neither pays more per year. Biweekly is the most common US schedule and makes overtime math cleaner. See both breakdowns in our calculator.