Biweekly pay arrives every 14 days, usually 26 times a year. Semimonthly pay arrives on two set dates each month, 24 times a year. On the same salary, the yearly total can match while each check and each month look different.
To decide which monthly amount to budget from, you need your per-check take-home pay, your actual pay dates and your bill due dates. The main limit: this compares timing, not taxes or benefits. Your pay stub decides the real net amount.
If you are paid biweekly, the calculator below projects which months of a year contain a third payday from one confirmed regular payday. Semimonthly schedules do not need it, because they always have two paydays a month.
Three-paycheck-month calendar
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What is the difference between biweekly and semimonthly pay?
The IRS withholding guide for employers, Publication 15-T, lists 26 pay periods a year for a biweekly payroll and 24 for a semimonthly payroll, with separate withholding tables for each period.
| Feature | Biweekly | Semimonthly |
|---|---|---|
| Pay periods per year | 26 (IRS Publication 15-T, Table 3) | 24 (IRS Publication 15-T, Table 3) |
| Payday pattern | Same weekday every 14 days | Two dates set by the employer, such as the 15th and the last day |
| Paydays in a calendar month | Usually 2; in a 26-payday year, 2 months have 3 | Always 2 |
| Days covered by each period | Always 14 | Varies with month length |
The word “bimonthly” causes confusion because people use it for both twice a month and every two months. If an offer letter or handbook says bimonthly, ask payroll how many paydays you get each year and on which dates.
Do you get paid more with biweekly or semimonthly pay?
For a salaried job, no: the annual salary is the same. The schedule only divides it differently. Hypothetical example. Input: $62,400 annual gross salary. Formula: salary ÷ 26 for biweekly and salary ÷ 24 for semimonthly.
Result: a biweekly gross check is $2,400.00, and a semimonthly gross check is $2,600.00. The semimonthly check is $200.00 larger, but the biweekly schedule has two more checks. Both schedules average $5,200.00 of gross pay per month over a full year.
What to check: whether your employer states pay as an annual salary or as a per-check amount. Also ask how a year with 27 biweekly paydays is handled. Twenty-six 14-day periods cover 364 days, so the calendar occasionally fits a 27th payday.
For hourly workers, the answer depends on hours worked in each period. A biweekly period always contains exactly two of every weekday. With periods ending on the 15th and the last day, a semimonthly period covers 13 to 16 days, so its workday count moves around.
Hypothetical example. A worker earns $20 an hour for 8 hours every weekday, with no holidays or overtime. A biweekly check covers 10 weekdays: 10 × 8 × $20 = $1,600.00. In February 2027, the 1st–15th has 11 weekdays and the 16th–28th has 9.
Those semimonthly checks would be 11 × 8 × $20 = $1,760.00 and 9 × 8 × $20 = $1,440.00. The month still totals $3,200.00, but the second check is $320.00 smaller. Budget each hourly check from its own hours rather than from an average.
Which monthly amount should you budget from?
With semimonthly pay, two checks are your ordinary month. With biweekly pay, two checks are also the ordinary month, and the third checks are extra months you can plan in advance. Using the yearly average as a monthly budget can leave most months short.
Hypothetical example. Input: $46,800 of take-home pay per year under either schedule, and no deduction differences between checks. Formula: $46,800 ÷ 26 = $1,800.00 per biweekly check; $46,800 ÷ 24 = $1,950.00 per semimonthly check; $46,800 ÷ 12 = $3,900.00 average month.
| Month type | Biweekly (26 × $1,800) | Semimonthly (24 × $1,950) |
|---|---|---|
| Two-payday month | $3,600 | $3,900 |
| Three-payday month | $5,400 (2 months in a 26-payday year) | Does not occur |
| Year total | $46,800 | $46,800 |
| Average per month | $3,900 | $3,900 |
Result: a biweekly earner who spends the $3,900 average every month is $300 short in each of the 10 two-payday months, $3,000 in total. The two three-payday months bring $1,500 above average each, which only repays that gap if the money is already committed.
What to check: build the biweekly budget on $3,600, then decide in advance where the two extra $1,800 checks go. The three-paycheck months guide covers how to find those months from your own payday.
How much should each check set aside for monthly bills?
Divide the yearly total of a bill by the number of checks you receive a year. This keeps each check responsible for the same share, even though biweekly paydays drift against calendar due dates.
Hypothetical example. Input: rent of $1,500 due on the 1st of each month. Formula: $1,500 × 12 = $18,000 a year. Semimonthly: $18,000 ÷ 24 = $750.00 per check. Biweekly: $18,000 ÷ 26 = $692.3077, rounded up to $692.31 per check.
Result: setting aside $750 from every biweekly check would collect $19,500 a year, $1,500 more than the rent. Setting aside $692.31 collects $18,000.06, six cents above the total because of rounding up.
What to check: whether enough of the set-aside money exists before each due date, especially at the start. A per-check share evens out over a year but can fall short in the first month. The biweekly bill calendar walks through dated balances.
Semimonthly paydays follow the calendar more closely, but ask payroll what happens when the 15th or the last day falls on a weekend or holiday. Whether that payday moves earlier or later is an employer policy, and a later deposit can matter for a bill due on the 1st.
What changes if your employer switches schedules?
A switch from semimonthly to biweekly, or the reverse, changes check size, the number of checks and often the first payday. Ask for the transition calendar, including how many days the first new check covers, so you can see any gap between paydays.
Take-home pay per check may not change in exact proportion to gross pay. Publication 15-T has separate wage bracket tables for biweekly and semimonthly payroll periods, and per-check benefit deductions may be recalculated. Compare your first pay stub under the new schedule with the old one.
State law can limit which schedules an employer may use. The Department of Labor’s table of state payday requirements, dated January 1, 2023, shows different rules by state. For example, its footnote says Massachusetts hourly employees must be paid weekly or biweekly.
That federal table is a summary with its own date and footnotes. Confirm the current rule with your state labor agency before relying on it in a dispute.
Does overtime work differently on a semimonthly schedule?
Under the federal Fair Labor Standards Act, overtime is counted by workweek, not by pay period. The Department of Labor’s Fact Sheet #23 defines a workweek as a fixed, regularly recurring 168-hour period and says averaging hours over two or more weeks is not permitted.
A semimonthly period does not line up with workweeks, so one workweek can straddle two pay periods. The fact sheet says overtime earned in a workweek must normally be paid on the regular payday for the period in which it was earned.
What to check: if your hours swing, compare each check with your time records week by week. The fact sheet covers the federal law only; exemptions and state rules can differ, so ask your employer or state agency when something looks wrong.
When does this comparison not fit?
- Your income is irregular. Commissions, tips or gig income change the amount of each check more than the schedule does. The irregular income budget starts from a low month instead.
- You are paid weekly or monthly. Weekly pay has 52 periods and monthly pay has 12 in the Publication 15-T table, so the two-schedule examples above do not apply directly.
- Deductions differ between checks. If your stub shows some deductions taken on only some checks, net pay per check is not a simple share of the yearly total.
- You hold jobs on different schedules. Plan each job’s paydays separately before combining them in one monthly budget.
- Your employer’s year has 27 biweekly paydays. Ask how salary is divided that year before assuming 26 equal checks.
Quick decision checklist
- Confirm with payroll whether you have 24 or 26 paydays a year, and the exact dates.
- Budget ordinary months from two actual take-home checks, not the yearly average.
- If you are biweekly, decide now where each third-check month’s extra money goes.
- Set aside yearly bill totals ÷ your number of checks, and check the first month’s timing.
- After any schedule change, compare the first new pay stub with the old one.
Sources and review
- IRS, Publication 15-T (2026), Federal Income Tax Withholding Methods, pay periods per year by payroll period and separate withholding tables.
- U.S. Department of Labor, State Payday Requirements, state payday frequency table dated January 1, 2023.
- U.S. Department of Labor, Fact Sheet #23: Overtime Pay Requirements of the FLSA, workweek basis for overtime and payment timing.
Prepared with AI-assisted research, drafting, and calculation checks. Not independently reviewed by a human financial professional.
