Biweekly pay means you are paid every two weeks, for 26 paychecks a year. Semimonthly pay means you are paid twice a month, usually on fixed dates, for 24 paychecks a year. For the same salary, your annual pay and annual taxes are essentially identical. What differs is the size of each check and when it arrives.
The biweekly vs semimonthly question matters most for budgeting, for hourly workers, and for how benefit deductions are split up. Here is how the two compare.
Biweekly vs semimonthly at a glance
| Item | Biweekly | Semimonthly |
|---|---|---|
| Paychecks per year | 26 (27 in some years) | 24 |
| Payday | Same weekday every other week, often Friday | Two set dates, such as the 15th and last day of the month |
| Checks per month | Usually 2, with 2 months a year that have 3 | Always 2 |
| Check size for a salary | Smaller | Larger |
| Hours per check (hourly workers) | Always 80 for full-time | Varies with the calendar |
| Common with | Hourly and salaried workers | Salaried workers |
How the paycheck sizes compare
Take a single filer earning $65,000 a year in Arizona, which has a flat 2.5% income tax. These are 2026 estimates from the PaycheckHubs paycheck calculator with a standard W-4 and no deductions.
| Line | Biweekly (26) | Semimonthly (24) |
|---|---|---|
| Gross pay | $2,500.00 | $2,708.33 |
| Federal income tax | $216.15 | $234.17 |
| Social Security | $155.00 | $167.92 |
| Medicare | $36.25 | $39.27 |
| Arizona income tax | $54.47 | $59.01 |
| Net pay per check | $2,038.13 | $2,207.96 |
| Net pay per year | $52,991.38 | $52,991.04 |
Each semimonthly check is about $170 larger, but you get two fewer of them. The annual totals differ by only a few cents of rounding. Withholding tables are built for each pay frequency, so neither schedule makes you pay more tax over the year.
The same holds in any state, from no-tax Texas to higher-tax Oregon: your annual state tax depends on annual income, not on how often you are paid.
Budgeting on each schedule
Semimonthly: easy monthly math
With semimonthly pay, your monthly income is simply two checks. In the Arizona example, that is $4,415.92 a month, every month. Rent and other bills that come due on fixed dates line up well with fixed paydays.
Biweekly: plan for two checks, enjoy the third
With biweekly pay, most months bring two checks ($4,076.26 in the example), but two months a year bring three. Your average monthly take-home is the annual net divided by 12, about $4,415.95.
A common approach is to build your monthly budget on two biweekly checks and treat each third-check month as a bonus for savings or debt. Our guide to building a budget around your take-home pay covers this in more detail.
Paydays also move. A biweekly payday falls on the same weekday, so its calendar date shifts each month. A semimonthly payday has a fixed date, but if it lands on a weekend or holiday, many employers pay on the business day before.
How benefit deductions are split
Employers usually spread annual benefit costs across the number of paychecks. A health plan that costs $3,120 a year would come out as $120 per biweekly check or $130 per semimonthly check. Here is the Arizona example with those premiums:
| Item | Biweekly | Semimonthly |
|---|---|---|
| Health premium per check | $120.00 | $130.00 |
| Net pay per check | $1,944.71 | $2,106.75 |
| Net pay per year | $50,562.46 | $50,562.00 |
Some biweekly employers take benefit deductions from only 24 checks and skip them on the third check of a month, which makes those checks larger. Others spread them over all 26. Your HR or payroll team can tell you which method they use.
What hourly workers should know
For hourly employees, biweekly pay is usually simpler. A full-time biweekly check always covers 80 hours. At $24 an hour in Arizona, that is $1,920 gross and about $1,586.60 net per check.
Semimonthly periods contain a different number of workdays depending on the month, so hours and pay vary from check to check. On average, a full-time $24-an-hour worker would see $2,080 gross and about $1,718.81 net per semimonthly check, but individual checks will run higher or lower.
Overtime also gets more complex. Under the Fair Labor Standards Act, overtime for non-exempt workers is based on hours over 40 in a workweek, not in a pay period. A semimonthly period can split a workweek in two, so payroll has to track weeks separately. See how overtime pay is calculated for the details.
Which schedule is better?
Neither pays more over a year. Biweekly gives you more paydays and two extra-check months. Semimonthly gives you fewer, larger checks on predictable dates. You usually don't get to choose: employers set the schedule, and some states have rules about how often certain workers must be paid. Check your state labor department if you have questions about pay timing.
For a full rundown of every schedule, including weekly and monthly, read how many paychecks you get in a year, and if your employer has an extra payday coming up, see what happens in a 27-paycheck year.
Frequently Asked Questions
Is biweekly the same as twice a month?
No. Biweekly means every two weeks, which adds up to 26 paychecks. Twice a month is semimonthly, which is 24 paychecks.
Do I pay more tax with semimonthly pay?
No. Each check withholds more because it is larger, but annual withholding is essentially the same for both schedules.
Which months have three biweekly paychecks?
It depends on the calendar and your first payday of the year. Count every other payday from your first one to find the two months with a third check.
Can my employer switch from biweekly to semimonthly?
Employers can generally change pay schedules, subject to state pay-frequency rules and notice requirements. Your state labor department can tell you what applies where you work.
Sources
- IRS Publication 15-T, Federal Income Tax Withholding Methods
- U.S. Department of Labor: Overtime Pay
- U.S. Department of Labor: Fair Labor Standards Act
Run the numbers for your state
Written and checked against IRS, Social Security Administration and state tax agency publications for the 2026 tax year. General information, not tax, legal or financial advice. Read our editorial policy, calculation methodology and sources.