Semi-Monthly Payroll: How It Works and Who It's For

If you're setting up payroll for the first time, you've probably heard "semi-monthly payroll" and "bi-weekly payroll" used like they mean the same thing. They don't. And if you have hourly workers, picking the wrong one can make payday a lot more complicated than it needs to be. 

This guide breaks down how semi-monthly payroll works, how it stacks up against other schedules, and how to figure out whether it's the right fit for your business.

What you need to know about semi-monthly payroll

Semi-monthly payroll means two fixed paychecks a month, 24 per year. Whether it works for your team depends almost entirely on whether you're paying salaried or hourly workers.

• Semi-monthly and bi-weekly are not the same. Semi-monthly has 24 pay periods; bi-weekly has 26 and always falls on the same weekday.
• Semi-monthly pay meaning in plain terms: paid on two fixed calendar dates each month, for a total of 24 paychecks a year. 
• Salaried teams: clean and predictable. Fixed calendar dates align well with monthly budgeting.
• Hourly teams: overtime gets complicated. Pay periods almost never contain two complete workweeks, so overtime can straddle two periods.
• The 86.67-hours-per-period assumption is wrong. Hourly employees must be paid for actual hours worked, not an average.
• Your state may restrict your options. Pay frequency is regulated, and some states set minimum requirements for hourly workers.

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What is semi-monthly payroll?

Semi-monthly payroll is a pay schedule where your team gets two paychecks every month on two set calendar dates. It's one of four common pay frequencies employers use.

Semi-monthly pay definition: You pay on fixed dates, like the 1st and 15th, for a total of 24 pay periods a year. That's not the same as bi-weekly, which produces 26 paychecks and always lands on the same day of the week.

One thing to clear up: some people call it "bi-monthly," which actually means every two months. Semi-monthly means twice a month. Different thing entirely.

According to the Bureau of Labor Statistics Current Employment Statistics survey (February 2023), about 19.8% of U.S. private employers use semimonthly pay, compared to 43.0% for bi-weekly and 27.0% for weekly. It's more common in salaried, office-based settings than in hourly industries.

How many paychecks do employees get on a semi-monthly schedule?

Exactly 24 a year, two every month, no exceptions. Bi-weekly produces 26, and occasionally a "three-paycheck month" when the calendar lines up. For salaried employees, that means semi-monthly checks are slightly larger than bi-weekly ones, because you're dividing the annual salary by 24 instead of 26.

How does semi-monthly payroll work?

Semi-monthly payroll works by splitting each calendar month into two pay periods, with paychecks issued on the same fixed dates every month. You pick two pay dates, run payroll for each period, and your team gets paid on those dates every month. 

Simple in theory. The wrinkle is that months aren't all the same length—so how many days are in a semi-monthly pay period? It varies: sometimes 15 days, sometimes 16. That inconsistency is manageable for salaried workers, but it's where things get tricky for hourly teams. 

Most employers split the month in half: the first period covers the 1st through the 15th, the second covers the 16th through the end. For a deeper look at how all of this fits into the bigger picture, check out our guide to understanding pay periods.

Common semi-monthly pay dates

There are three setups most employers use:

• 1st and 15th: The most common. Pay drops on the first and fifteenth every month.
• 15th and last day of the month: Works well if your accounting runs on a month-end cycle.
• 5th and 20th: Less common, but some employers use it to spread out cash flow.

What happens when payday falls on a weekend or holiday?

Move payday to the Friday before, or in some cases the next business day. Set this policy before your first pay run and tell your team upfront. No one likes to find out their paycheck is a day late with no warning.

The 86.67-hour semi-monthly payroll myth 

You'll sometimes see payroll guides suggest splitting a full-time employee's 173.33 monthly hours equally across two periods, landing on a fixed 86.67 hours per check. Some semimonthly payroll systems even default to this. Don't do this.

Your hourly employees get paid for actual hours worked, not an average. The question "how many hours in a semi-monthly payroll period" doesn't have a fixed answer -- it depends on the actual workdays in each period. Semi-monthly pay periods don't have the same number of workdays, so a fixed hourly figure will either shortchange your team or overpay them. 

Either way, you've got an FLSA problem. Use real timesheets every period, not estimates.

Semi-monthly vs. bi-weekly payroll: what's the difference?

These two get mixed up constantly, and it matters, especially if you have hourly workers. Both pay employees twice per period, but they work differently in ways that affect how you manage payroll every single pay run.

Here's where they differ:

Pay periods per year: Semi-monthly has 24 pay periods while bi-weekly has 26.

Pay date consistency: Semi-monthly lands on fixed calendar dates, so the weekday shifts each month. Bi-weekly always hits the same weekday (usually Friday), which most employees find easier to plan around.

Overtime: Bi-weekly is cleaner here. Each period contains exactly two full seven-day workweeks. Semi-monthly periods don't, so overtime calculations can bleed across two pay periods.

Paycheck size: Semi-monthly checks are slightly larger for salaried employees, because annual salary divided by 24 is more than divided by 26.

Who it suits: Semi-monthly works well for salaried teams. Bi-weekly is generally a better fit for hourly or mixed teams.

For everything you need to know about bi-weekly payroll, our full guide has you covered.

Doing this math manually every pay run is where errors creep in. When your timesheets flow directly into payroll and the system does the math, it matters a lot less which schedule you're on. That's exactly how Homebase payroll works, whatever pay frequency you choose.

How semi-monthly payroll compares to weekly and monthly schedules

It helps to see the full picture. Here's where semi-monthly sits among all four common pay frequencies.

Worth knowing: construction employers use weekly pay at a rate of 65.4%, per BLS data. That tells you something about what hourly, high-turnover industries actually run on. Monthly pay, meanwhile, is rare and restricted in many states.

1. Weekly (52 pay periods/year): Common in restaurants, retail, and construction. Many hourly workers prefer it, and in high-turnover industries it can help with retention.
2. Bi-weekly (26 pay periods/year): The most popular schedule in the U.S. Same weekday every pay run, even workweeks, easy to manage for hourly and salaried teams alike.
3. Semi-monthly (24 pay periods/year): More of an office and salaried world staple. Fewer pay runs than bi-weekly, with consistent calendar dates that fit monthly budgeting.
4. Monthly (12 pay periods/year): Rare in the U.S. and restricted in many states for hourly workers. Usually only used for executive or seasonal pay.

Our weekly payroll guide has a full breakdown if you're weighing that option for your hourly team.

When payroll runs right every time, the frequency is less of a headache than you'd think. See how we handle it, whatever schedule you land on.

How is overtime calculated for semi-monthly payroll?

This is the part that trips up a lot of business owners, and where getting it wrong can be expensive.

Here's the rule you need to know: Under the Fair Labor Standards Act (FLSA), overtime is based on the 7-day workweek, not the pay period. It doesn't matter how your pay periods are set up. What matters is how many hours an employee worked in each fixed seven-day workweek.

Semi-monthly periods almost never line up with complete workweeks. Your pay period splits the calendar month in half, which means a workweek will often straddle two different pay periods. When that happens, you can't close out overtime until the second period ends and you have the full week's hours.

The U.S. Department of Labor's Fact Sheet #23 is clear: a workweek is 168 consecutive hours, and you can't average hours across weeks. The DOL's own overtime calculator example shows overtime from a split workweek getting paid out in the second period. That's exactly the kind of thing that's easy to miss without a solid system. 

For broader context, check the DOL's overtime overview and our FLSA workweek glossary entry.

If you're also weighing bi-weekly, overtime on bi-weekly payroll covers the same FLSA principles with a slightly different angle.

For hourly teams, a time clock that captures actual hours, not assumed ones, is the only solid foundation for getting overtime right. Stay compliant by making accurate time data the starting point for every payroll run.

Can hourly employees be paid semi-monthly?

Yes, in most states, but it's harder to manage than bi-weekly or weekly. The split-workweek issue above is the main reason most hourly-heavy businesses lean toward bi-weekly or weekly schedules. If your whole team is salaried, semi-monthly is smooth. If you've got non-exempt hourly workers, take a look at our guide to the best payroll schedule for hourly workers before you commit.

Does your state allow semi-monthly pay?

Pay frequency isn't just your call. It's regulated at the state level, and the rules vary a lot.

Some states require at least semi-monthly pay, meaning bi-weekly or more frequent is fine but monthly isn't. Others set different minimums for hourly versus salaried workers. A handful restrict or prohibit monthly pay for certain categories entirely. Before you lock in your schedule, make sure your state is on board.

Start with the DOL's state payday requirements page for a state-by-state overview. For more detail, our state labor law guides cover the full picture. Either way, confirm the rules with your state labor agency or an employment attorney before you make a final call.

Pros and cons of semi-monthly payroll

Every pay schedule has tradeoffs. But what do hourly employees prefer? Scott Leitner, Senior Manager of Payroll Operations at Homebase, explains: “Employees who are living paycheck to paycheck often prefer more frequent pay. A weekly or bi-weekly schedule can make it easier for them to budget week to week, and that matters for retention in hourly industries.”

Here’s how a semi-monthly payroll schedule may feel for your hourly team:

Pros:

• Fixed, predictable pay dates make it easier for employees to plan and for you to forecast cash flow.
• Fewer pay runs than bi-weekly or weekly: 24 a year instead of 26 or 52.
• Simple math for salaried teams: divide annual salary by 24, same check every time.
• Benefit deductions split evenly across two monthly checks, which simplifies admin.
• Aligns with monthly billing cycles for rent, utilities, and other recurring costs.

Cons:

• Uneven pay-period lengths (15 days one period, 16 the next) make hourly payroll messier.
• Overtime can straddle two periods when workweeks don't line up with your pay dates.
• Pay dates shift weekdays every month, which can frustrate employees who expect a Friday paycheck.
• A tough sell in hourly industries where weekly pay is the norm and employee expectations are set.

Is semi-monthly payroll right for your business?

It comes down to your team and how your cash flow works.

It's probably a good fit if:

• Most of your team is salaried and exempt from overtime.
• You want predictable, fixed pay dates that match your monthly billing cycle.
• You're looking to simplify your payroll calendar without going all the way to monthly.

It may not be the right call if:

• You have a lot of non-exempt hourly employees, where the overtime complexity adds up fast.
• Your team works in restaurants, construction, or retail, where weekly pay is the expectation.
• You're expecting high turnover, where pay frequency is a real factor in whether people stay.

For the step-by-step on running payroll once you've picked your schedule, see how to run payroll for your small business. And if you've still got basic questions, how often is semi-monthly pay and the semi-monthly pay glossary entry are good places to start.

Semi-monthly payroll: the bottom line 

Semi-monthly payroll is a solid choice for salaried teams that want predictable pay dates and a simpler payroll calendar. For hourly-heavy businesses, bi-weekly is usually the easier path: cleaner overtime, consistent Friday paydays, and a schedule your team already expects. Either way, check your state's rules before you decide.

The schedule you pick matters less than running payroll right every time. 

"With Homebase and Clover, running payroll takes five minutes. I log in, check the time cards, hit submit, and it's done," says Tiana Post, owner of Awaken Bakery. 

Homebase payroll turns your team's time cards into wages automatically, handles the overtime math, and files taxes for you. Take a look at how it works and find the right fit for your team.

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Frequently asked questions about semi-monthly payroll

What does semi-monthly mean in payroll?

Semi-monthly payroll means your team gets paid twice a month on fixed calendar dates, like the 1st and 15th or the 15th and the last day of the month, for a total of 24 pay periods a year. It's not the same as bi-weekly, which produces 26 pay periods and always falls on the same day of the week.

What does semi-monthly pay mean and what is a semi-monthly paycheck?

Semi-monthly pay means your wages are issued on two fixed calendar dates each month. A semi-monthly paycheck covers one half of the calendar month (roughly 15 or 16 days). 

For salaried employees, each check equals annual salary divided by 24. For hourly employees, the check reflects actual hours worked during that specific half-month period.

How many pay periods are in a semi-monthly payroll?

24 pay periods a year, exactly two per month. Bi-weekly has 26 and weekly has 52. Because you're dividing the annual salary by 24 instead of 26, semi-monthly checks are slightly larger than bi-weekly ones for salaried employees.

How do you calculate semi-monthly pay?

For salaried employees, divide the annual salary by 24. Someone earning $60,000 a year gets $2,500 per check. For hourly employees, each paycheck reflects the actual hours worked during that specific pay period, not an assumed average.

How is overtime calculated for semi-monthly payroll?

Overtime is based on the 7-day FLSA workweek, not the pay period. Because semi-monthly periods don't contain two full workweeks, a single workweek can straddle two pay periods. When that happens, any overtime from the split week gets included in the second period's paycheck once all hours are in.

Is semi-monthly payroll better than bi-weekly?

Semi-monthly is simpler for salaried workers: fewer pay runs, consistent calendar dates. Bi-weekly works better for hourly teams: cleaner overtime, same weekday every pay run, and it matches what most hourly workers expect. Check your state's minimum pay frequency rules before you choose either one.

What happens if a semi-monthly payday falls on a holiday?

If a semi-monthly payday falls on a holiday, most employers move payday to the Friday before, or the next available business day. Set this in your payroll policy before your first pay run and let your team know so no one's caught off guard.

What are the disadvantages of semi-monthly payroll?

The disadvantages of semi-monthly payroll include: 

• Uneven pay-period lengths that make hourly payroll messier
• Overtime complexity when workweeks don't align with your pay periods
• Floating weekday pay dates that can frustrate employees used to Friday paychecks
• Mismatch with hourly and high-turnover industries where weekly pay is the standard