Semi-monthly vs biweekly pay, what is the difference?
Semi-monthly vs biweekly pay comes down to the calendar. Semi-monthly means twice a month on fixed dates, such as the 15th and the last day, for 24 paychecks a year. Biweekly means every 2 weeks on the same weekday, for 26 paychecks and, in some years, 27. Annual pay is identical. Each check is not.
Semi-monthly vs biweekly pay at a glance
| Semi-monthly | Biweekly | |
|---|---|---|
| How often | Twice a month | Every 2 weeks |
| Paychecks a year | 24 | 26, and 27 in some calendar years |
| Payday | Fixed dates, such as the 15th and the last day. The weekday moves. | The same weekday, such as every other Friday. The date moves. |
| Pay period length | 13 to 16 days | Always 14 days |
| Gross check on a $60,000 salary | $2,500.00 | $2,307.69 |
| Months with 3 paychecks | None | 2 in most years |
| Overtime fit | A period can end mid-workweek, so that week's overtime lands on a later check. | Each period holds 2 whole workweeks when payday matches the workweek. |
| Share of US private establishments, February 2023 | 19.8% | 43.0% |
What does semi-monthly mean?
Semi-monthly pay The meaning of semi monthly in payroll: paid twice a month on 2 fixed dates, which is 24 pay periods a year in the IRS table of payroll periods. The IRS and the BLS both spell it semimonthly, with no hyphen.
A typical semi monthly pay schedule is the 15th and the last day of the month. A $60,000 salary becomes 24 semi monthly payments of $2,500.00 gross. Semi monthly payroll usually moves a weekend payday to a nearby business day, so check your policy.
Bimonthly is not a pay schedule
In bi monthly vs semi monthly, bimonthly carries 2 dictionary senses, twice a month and every 2 months, which is exactly why payroll avoids it. Semi-monthly never means every other month. On payroll documents, write semi-monthly, or name the 2 dates.
What is biweekly pay?
Biweekly pay Paid every 2 weeks on the same weekday, which is 26 pay periods in a standard year in the IRS table. It was the most common schedule in the US at 43.0% of private establishments in February 2023.
Bi weekly pay usually means every other Friday. Each check covers 14 days, or 80 hours at 40 hours a week. Because 2 weeks do not divide into a month, 2 months a year bring 3 bi-weekly paychecks instead of 2.
Biweekly, semi-monthly, bimonthly and semiweekly compared
| Term | Plain meaning | Times a year | In US payroll |
|---|---|---|---|
| Weekly | Every week | 52 | Common for hourly trades. 65.4% of construction establishments paid weekly in February 2023. |
| Biweekly | Every 2 weeks | 26, sometimes 27 | The most common schedule, at 43.0% of US private establishments in February 2023. |
| Semi-monthly | Twice a month | 24 | More common in information at 37.5% and in financial activities at 30.2%. |
| Bimonthly | Twice a month or every 2 months | 24 or 6 | Ambiguous in both dictionary senses. Keep it off pay documents. |
| Semiweekly (semi-weekly) | Twice a week | 104 | Names an IRS tax deposit schedule for employers, not how often staff are paid. |
| Monthly | Once a month | 12 | Least common at 10.3% of US private establishments in February 2023. |
How does biweekly pay work, step by step
- Start from the annual salary or the hourly rate Salaried pay is one annual number split across the year's periods. Hourly pay is computed from hours actually worked in each period.
- Salaried: divide by 26, or by 24 Divide the annual salary by the number of pay periods in the schedule. The annual total is the same either way. Only the size of each check changes. $60,000 divided by 26 is $2,307.69. $60,000 divided by 24 is $2,500.00.
- Hourly: count each workweek separately Overtime is figured per workweek and may not be averaged across the 2 weeks in a biweekly period. 80 hours in a period does not mean no overtime is owed. 30 hours one week then 50 the next still owes 10 hours of overtime for the second week.
- Count this year's paydays on the employer's calendar A biweekly cycle usually produces 26 paydays in a calendar year. Some cycles produce 27, so read the published payroll calendar rather than assuming.
- Plan for the two 3-paycheck months On biweekly, 2 months a year contain 3 paydays. Which 2 depends on the cycle. Deductions taken 24 times a year may skip that third check.
How many biweekly pay periods are in 2026?
26 for most employers, and 27 for some. The reason is simple arithmetic: 26 biweekly pay periods cover 26 times 14, or 364 days. A 365-day year leaves 1 day over and a leap year leaves 2, so the paydays drift forward and a 27th eventually lands inside a calendar year.
A year holds 27 biweekly paydays only when the first payday falls on January 1, or on January 1 or 2 in a leap year. January 1, 2026 is a Thursday, so a Thursday cycle paying that day has 27. A Friday cycle paying January 2, 2026 has 26, and its 27th falls on Friday January 1, 2027. Pay that one early for the holiday and 2026 shows 27.
The federal government describes the same pattern: OPM says there are usually 26 pay dates each year and that over a period of several years employees can expect 27 pay days in a calendar year. Semi-monthly payroll never has this problem, because 24 is 24 every year. For how many pay periods for biweekly apply to you, check your employer's published payroll calendar.
4 places where the schedule changes the math
A semi monthly payroll period ends on Wednesday the 15th, but the workweek runs through Saturday.
Overtime earned in a workweek is due on the regular payday for the period in which that workweek ends, so the straddling week's overtime is not on the 15th check.
Expect that overtime on the next check, and confirm your employer's workweek start day.
A benefit premium is quoted as $200 a month, and you are moving from semi-monthly to bi weekly payroll.
On 24 checks it is $100 each. On 26 checks it is either $92.31 every time, or $100 on 24 checks with 2 deduction-free checks. Plan design decides which.
Ask payroll which method your plan uses before the first 3-paycheck month.
A salaried employee on biweekly hits a calendar year with 27 paydays instead of 26.
The employer either pays 27 full checks that year, which costs an extra period of salary, or divides the annual salary by 27 so each check is smaller.
Look for a written notice before January, and check your state's rules on pay reductions.
An exempt employee's salary is spread across 27 checks to avoid paying a 27th full check.
The federal salary level of $684 a week translates to $1,368 biweekly, $1,482 semimonthly and $2,964 monthly in the regulation itself.
A divide-by-27 check must still clear $1,368. Some states set a higher level.
What US law says about how often you must be paid
Federal law does not pick a pay frequency. The FLSA requires that wages be paid on the regular payday for the pay period covered, and leaves the choice of weekly, biweekly, semi-monthly or monthly to the employer. What constrains that choice is state law, and it varies a lot.
The DOL's state payday table, dated January 1, 2023, shows the range. Arizona requires a payday 2 or more days a month, not more than 16 days apart. Massachusetts requires hourly employees to be paid weekly or biweekly and allows salaried employees to be paid semi-monthly. Alabama and Florida specify no regulation at all.
California is the strictest of the examples. Wages must be paid at least twice during each calendar month on days designated in advance, work from the 1st to the 15th must be paid by the 26th, and weekly, biweekly or semimonthly payroll must be paid within 7 calendar days of the period's end. This is not legal advice, rules change, and your state labor agency is the authority.
Bi weekly or semi monthly: a checklist for employers
- Check your state's minimum pay frequency first, before anything else
- Mostly hourly staff with overtime? Biweekly keeps whole workweeks inside each period
- Mostly salaried? Semi-monthly keeps checks equal and month-end accruals clean
- Decide the deduction method for the two 3-paycheck months
- Decide now, in writing, how a 27-payday year will be handled
- Where the state sets a lag limit, pick paydays that stay inside it
- Publish the full-year payroll calendar with every payday dated
Writing pay frequency into offer letters and job posts
Do
- Name the dates or the weekday, such as paid on the 15th and last day of each month
- State the annual salary and the gross amount of a single check
- Say how many paychecks to expect in the candidate's first calendar year
- Say what happens when a payday falls on a weekend or a holiday
Do not
- Bimonthly, which can be read as every 2 months
- Twice monthly when you actually mean every 2 weeks
- A biweekly check amount multiplied by 24 to imply an annual salary
The short version
- Semi-monthly is 24 paychecks a year on 2 fixed dates, with periods of 13 to 16 days
- Biweekly is 26 paychecks on the same weekday, 27 in some calendar years
- The annual salary is identical. The size of each check is not
- Bimonthly is ambiguous, and semiweekly is an IRS deposit term, not a pay frequency
- The FLSA sets no pay frequency. States set the minimum, so check yours
If the person who runs payroll also does the hiring
A one-line brief becomes structured filters about the person and about their current employer.
The Cognitive is recruiting software and has no payroll features. It helps with the step before anyone is on the payroll: describe the hire in plain English and it searches ~900M profiles, ranks the results and labels the strong matches.
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Frequently asked questions
What does semi monthly mean?
Twice a month. In payroll it means 2 fixed paydays each month, such as the 15th and the last day, and 24 paychecks a year. It does not mean every other month. The IRS lists semimonthly as 24 pay periods a year, alongside biweekly at 26 and monthly at 12.
What is semi monthly pay, and what does semi monthly pay mean on a pay stub?
It is a salary or wage paid on 2 set dates each month. Common pairs are the 1st and the 15th, or the 15th and the last day. A salaried worker's gross check is the annual salary divided by 24, so $60,000 a year is $2,500.00 per check. The periods are not equal length: they run about 15 or 16 days, and shorter in February.
What is biweekly pay?
On a pay stub, what biweekly pay means is pay issued every 2 weeks on the same weekday, usually every other Friday, for 26 paychecks in a standard year. It was the most common arrangement among US private establishments at 43.0% in February 2023 per the BLS. Dictionaries give biweekly a second sense of twice a week, but that sense is never what US payroll means.
How does biweekly pay work?
For salaried staff, the annual salary is divided by 26, so $60,000 becomes $2,307.69 gross per check. For hourly staff, each check covers hours actually worked across 2 workweeks. Overtime is calculated week by week and cannot be averaged across the 2 weeks, so 30 hours then 50 hours still owes overtime for the second week.
How many bi weekly pay periods are in 2026?
26 for most employers. A cycle has 27 only if it pays on Thursday January 1, 2026, or if its Friday January 1, 2027 payday is moved early to December 31, 2026 because of the holiday. Semi-monthly payroll has 24 in 2026 either way. Check your employer's published payroll calendar for the exact count.
How many paychecks are in a year on biweekly pay?
26 in a standard year, which is the figure the IRS uses. A 27th appears in calendar years where the first payday falls on January 1, or on January 1 or 2 in a leap year. In 2024, for example, that meant only cycles paying Monday January 1 or Tuesday January 2. OPM tells federal employees to expect 27 pay days over a period of several years.
Is bimonthly the same as semi-monthly?
Sometimes, and that is the problem. Bimonthly has 2 accepted senses: every 2 months, and twice a month. Because a reader cannot tell which one is meant, payroll documents use semi-monthly for twice a month and avoid bimonthly entirely. If you see bimonthly on a pay document, ask which dates are meant.
What does semiweekly mean, and how is it different from biweekly?
In semiweekly vs biweekly, semiweekly means twice a week and biweekly means every 2 weeks. In US payroll, semiweekly is not a pay frequency at all: it names an IRS tax deposit schedule for employers that reported more than $50,000 of taxes in the lookback period. The IRS states plainly that the deposit schedule has nothing to do with how often a business pays its employees.
Is it better to be paid biweekly or semi-monthly?
Annual pay is the same, so it depends on how you budget. Biweekly gives smaller, more frequent checks on a predictable weekday, plus 2 months a year with a third paycheck. Semi-monthly gives larger checks on fixed dates that line up with rent and monthly bills. Neither is better on the money itself.
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