Published October 13, 2026 · Payroll
Biweekly vs Semi-Monthly Pay: What's the Difference?
Biweekly means every 14 days. Semi-monthly means twice a month. The labels sound alike, and the paycheck is not.
A biweekly employee is paid every two weeks and usually receives 26 paychecks a year. A semi-monthly employee is paid twice a month and receives 24 paychecks. Split the same salary either way and each check changes, even though the year does not.
Paycheck size on a $62,400 salary
Divide annual salary by the number of paychecks:
- Biweekly: $62,400 ÷ 26 = $2,400 gross
- Semi-monthly: $62,400 ÷ 24 = $2,600 gross
The semi-monthly check is $200 larger. Over 12 months both schedules still pay $62,400. A monthly budget should use two biweekly checks ($4,800) in a normal month, or two semi-monthly checks ($5,200). Do not plan the year around a month that happens to contain an extra payday.
| Schedule | Pays per year | Gross check | Payday |
|---|---|---|---|
| Biweekly | 26 | $2,400 | Same weekday, every 14 days |
| Semi-monthly | 24 | $2,600 | Fixed dates, such as the 15th and last day |
The calendar is the real difference
Biweekly paydays stay on one weekday. If you are paid every other Friday, the date moves through the month: the 2nd, then the 16th, then the 30th. Two months in a typical year contain three of those Fridays. The third check is not extra income. It is one of the 26 checks arriving early on the calendar.
Semi-monthly dates stay put. The 15th and the last day of the month do not drift, and you never get a third check. The period length does change: February can be 13 or 14 days in one half and 14 or 15 in the other, while a 31-day month is uneven too.
Most calendar years contain 26 biweekly paydays. A 27th payday happens when the first payday of the year falls early enough that 26 gaps of 14 days still end inside that year. In a non-leap year, that means a payday on January 1. Payroll teams often annualize salary at 26 checks, so a 27th date has to be handled on purpose or the year is overpaid.
Hourly hours are not 80 on both schedules
A standard full-time year is often counted as 2,080 hours (40 × 52). That lines up cleanly with biweekly pay:
- Biweekly: 2,080 ÷ 26 = 80 hours per check
- Semi-monthly: 2,080 ÷ 24 = 86.67 hours per check
At $24 an hour, those standard periods gross $1,920 biweekly and $2,080 semi-monthly. Annual pay is $49,920 either way. Use the hourly to salary calculator when you need the year, and the biweekly time card when you are entering 14 actual days.
Overtime follows the workweek
The Fair Labor Standards Act counts overtime by workweek, not by pay period. More than 40 hours in one workweek is overtime for a non-exempt employee, even if the biweekly total is 80 or the semi-monthly total looks normal.
Example: 45 hours in week one and 35 hours in week two. The biweekly total is 80 hours. Federal overtime is still 5 hours from week one. Averaging the two weeks into a flat 40 is the mistake.
Semi-monthly periods make this easier to miss because a workweek can be split across the 15th. Track each workweek on its own, then pay it on whichever check includes that week. The overtime calculator and the guide on how to calculate overtime pay cover the rate. State rules can add a daily threshold on top of the weekly one.
Benefit deductions change the take-home check
Health insurance is often priced by the month and then spread across paychecks. A $600 monthly premium is $7,200 a year:
- Biweekly: $7,200 ÷ 26 = $276.92 per check
- Semi-monthly: $7,200 ÷ 24 = $300.00 per check
Some employers deduct benefits from only 24 of the 26 biweekly checks, so the two "extra" checks are larger. Ask which method your payroll uses before you treat a fat Friday as a raise. Federal income tax, Social Security, and Medicare still come out of every check. The paycheck calculator estimates take-home after those taxes.
Which schedule shows up where
In February 2023, the U.S. Bureau of Labor Statistics estimated that 43.0% of private establishments paid biweekly, 27.0% paid weekly, 19.8% paid semimonthly, and 10.3% paid monthly. Biweekly was more common at larger employers. Construction leaned weekly (65.4%). Financial activities and professional services used semimonthly more often than construction did. Those figures are a point-in-time snapshot from the Current Employment Statistics survey, not a rule about what your employer must do.
Hourly teams usually fit biweekly pay because the timecard is 14 days and each week is a clean overtime block. Salaried office pay often uses semi-monthly dates because rent, loans, and benefits already fall on the 1st and the 15th. State payday laws set how soon wages must be paid after they are earned. They do not require one of these two schedules nationwide.
How to convert a check you already have
- Multiply a biweekly gross check by 26 to estimate annual pay. Multiply a semi-monthly gross check by 24.
- Divide that annual figure by the other schedule's count if you are comparing an offer.
- Keep hourly offers in hours. A higher semi-monthly check can hide a lower rate if the period assumes 86.67 hours.
Offer A: $2,500 semi-monthly. Annual gross is $2,500 × 24 = $60,000. Offer B: $2,400 biweekly. Annual gross is $2,400 × 26 = $62,400. Offer B pays more for the year even though the check is smaller. The salary to hourly calculator turns either annual figure into a rate.
Frequently asked questions
Is biweekly the same as semi-monthly?
No. Biweekly pay is every 14 days, usually 26 paychecks a year. Semi-monthly pay is twice a month on set dates, always 24 paychecks a year.
Which paycheck is larger, biweekly or semi-monthly?
For the same annual salary, the semi-monthly check is larger because the year is split into 24 pays instead of 26. A $62,400 salary is $2,600 semi-monthly and $2,400 biweekly.
Do biweekly employees earn more money?
Not from the schedule alone. The same salary pays the same amount over a full year. Hourly workers are paid for hours worked, so a longer semi-monthly period is not a raise.
How is overtime calculated on a semi-monthly schedule?
Under the Fair Labor Standards Act, overtime is based on the workweek, not the pay period. Hours over 40 in one workweek are overtime even when that week is split across two semi-monthly checks.
Why do some months have three paychecks?
A biweekly Friday payday lands three times in two months of most years. Those months are not a bonus. They are the same annual pay arriving on a different calendar.
Related calculators
- Biweekly time card calculator for a 14-day pay period
- Weekly time card calculator when overtime must be split by week
- Paycheck calculator for take-home pay after taxes
- Overtime calculator for time-and-a-half on hours over 40
This guide is for planning and checking a paycheck. It is not legal, tax, or payroll advice. Confirm your pay dates, deductions, and overtime rule with your employer. Pay-frequency shares are from the Bureau of Labor Statistics, Current Employment Statistics, February 2023.