Biweekly, semi-monthly, and the two months a year that feel different
Figures from the May 2025 BLS release
Biweekly and semi-monthly sound like synonyms and are not. Biweekly means every two weeks — 26 paychecks a year. Semi-monthly means twice a month, usually the 15th and the last day — 24 paychecks a year.
On the same salary, that difference changes what lands in your account each time:
| Schedule | Paychecks/year | Each cheque on $60,000 |
|---|---|---|
| Weekly | 52 | $1,154 |
| Biweekly | 26 | $2,308 |
| Semi-monthly | 24 | $2,500 |
| Monthly | 12 | $5,000 |
The two extra paychecks
Because 52 weeks divides into 26 fortnights but the calendar has 12 months, a biweekly schedule produces two months a year with three paychecks instead of two. Your annual total is unchanged — $60,000 either way — but the rhythm is not.
This trips up monthly budgeting in a specific way. If you budget on the assumption of two paychecks a month, ten months are tight and two feel like a windfall. The more robust approach is to budget on $2,308 × 26 and treat the third cheque as scheduled rather than surprise income.
Semi-monthly has the opposite problem
Twenty-four equal paychecks align neatly with monthly bills, which is why finance departments like it. The cost is that pay periods do not align with workweeks, which makes overtime calculation messier for hourly staff — overtime is a weekly calculation regardless of when you are paid. That mismatch is why semi-monthly is common for salaried roles and rarer for hourly ones.
Converting between them
Divide the annual figure by 26, 24, 52 or 12 as appropriate. The converter shows every period side by side for any salary, along with the occupations that actually earn it.