The four schedules
Federal law does not set how often you must be paid. The Fair Labor Standards Act requires only that wages be paid promptly on the regular payday for the period covered. What it does expect is consistency — an employer cannot vary the schedule at will.
Minimum pay frequency is set at state level instead. Most states require at least semi-monthly pay, a few require weekly for particular categories of work, and a handful set no requirement at all. State law sets a floor, not a ceiling: an employer may always pay more often than the minimum, never less. The Department of Labor maintains a state-by-state payday requirements table, which is the place to start for your own state — then confirm with your state labor agency, since these change and the federal summary is not always current.
| Schedule | Per year | Payday falls | What it means in practice |
|---|---|---|---|
| Weekly | 52 or 53 | Same day every week | Common in construction, trades and hourly shift work. Smallest, most frequent cheques. |
| Biweekly | 26 or 27 | Same day every second week | The most common US schedule. Two months a year contain three paydays instead of two. |
| Semi-monthly | 24 | Two fixed dates each month | Always exactly 24. Paydays drift across weekdays and can land on a weekend. |
| Monthly | 12 | One fixed date each month | Least common for hourly staff. Largest individual payments. |
The distinction that explains everything else
Weekly and biweekly are day-based. They count intervals — every 7 or every 14 days — so they drift against the calendar and can pick up an extra period.
Semi-monthly and monthly are date-based. They are pinned to dates on the calendar, so twelve months times two paydays is always exactly 24. They cannot drift and never gain a period.
Almost every complication on this page follows from that one difference.
Biweekly and semi-monthly are not the same thing
This is the most common confusion in payroll, and the difference is two paychecks a year.
Biweekly means every 14 days. Because 26 × 14 is 364 days and a year is 365 or 366, the schedule drifts forward slightly each year. You get 26 paydays, and twice a year a month contains three of them.
Semi-monthly means twice a month on fixed dates — the 15th and the last day, say. That is always exactly 24 payments, no drift, no extra period ever. But the interval is uneven: 13 to 16 days depending on the month.
| Biweekly | Semi-monthly | |
|---|---|---|
| Paydays per year | 26 (sometimes 27) | 24, always |
| Interval | Exactly 14 days | 13–16 days |
| Payday weekday | Always the same | Varies, can hit a weekend |
| Months with 3 paydays | 2 per year | Never |
| Hours in a period at 40/wk | 80 | 86.67 on average |
| Overtime tracking | Simple — periods align with workweeks | Awkward — periods split workweeks |
That last row is why hourly employers usually choose biweekly. Overtime is calculated per workweek, and a biweekly period is exactly two workweeks. A semi-monthly period cuts through the middle of a week, so the same week's hours land in two different pay runs.
On the same annual salary, a semi-monthly paycheck is larger than a biweekly one — 1/24th versus 1/26th — but you receive it less often. The annual total is identical.
The 27-paycheck year
Twenty-six pay periods of 14 days covers 364 days. A calendar year is 365, or 366 in a leap year. That leftover day accumulates, and eventually the calendar has room for a 27th payday. Weekly schedules do the same thing faster — 52 × 7 is also 364, but because the periods are half as long the extra one arrives about twice as often, producing a 53-paycheck year every five or six years.
Whether it happens to you depends on where your paydays fall, not on the year alone. Of the fourteen possible starting positions in any given year, one produces 27 paydays and thirteen produce 26. Averaged out, a biweekly employee sees a 27-payday year roughly once a decade — Louisiana's state payroll office puts the interval at every 10 to 12 years.
2026 is a 27-period year for many federal employees
The GSA payroll calendar for 2026 lists 27 pay periods, the last one ending December 26 with the final EFT deposit on December 31. Three-paycheck months on that schedule are January and July.
But not every federal employee is on it. Agencies serviced by the National Finance Center show 26 pay dates for the same calendar year, because their cycle sits a few days later. Two federal employees, same year, different counts — which is the clearest possible demonstration that the answer depends on your cycle rather than the calendar.
What employers do about it, and why your cheque might change
A 27th payday does not mean extra money for salaried staff. The annual salary is fixed, so the employer has to divide it differently — and there are two ways to handle it.
Divide by 27. Each paycheck that year is slightly smaller, and the annual total comes out exactly right. Someone on $60,000 gets $2,222.22 instead of $2,307.69.
Keep the same amount and pay the extra. Simpler, and staff prefer it, but the employer pays about 3.85% more in salary that year — one extra check out of twenty-six.
Hourly employees are unaffected — they are paid for hours worked, so a 27th period is simply another two weeks of work. If your salaried paycheck changes slightly in January for no obvious reason, this is usually why.
Either way it is not a bonus. Louisiana's Office of State Uniform Payroll put it plainly in its own memo on the subject: employees work and are paid for work performed for 27 full pay periods. You are being paid for time you worked, and the calendar has simply put an additional payday inside this particular year.
Why your first paycheck was late or small
Most US employers pay in arrears, meaning the payday comes after the period it covers rather than during it. If a biweekly period runs the 1st to the 14th and pays on the 20th, that six-day gap is the time payroll needs to collect timesheets, approve them and process the run.
For a new hire this compounds. You may work two full weeks before the period you were hired into even ends, then wait again for the payday. Three to four weeks between starting and your first deposit is normal, and the first one is often partial because you only worked part of that period.
The alternative, paying current, means the cheque is issued before the period ends — which requires estimating hours not yet worked, so it is mostly limited to salaried staff.
Which months have three paychecks?
On a biweekly schedule, two months each year contain three paydays instead of the usual two. Which months depends on your first payday of the year — the calculator above marks them, and the dates are listed in full so you can see where they fall.
They are not bonus money. Your annual pay is unchanged; the calendar has simply grouped three of your normal paychecks into one month. Budgeting advice often treats these as windfalls, which works if you budget on a monthly basis but is worth understanding for what it actually is.
Converting between frequencies
Per-period gross is always the annual salary divided by the number of periods. On $60,000:
| Schedule | Periods | Per paycheck |
|---|---|---|
| Weekly | 52 | $1,153.85 |
| Biweekly | 26 | $2,307.69 |
| Biweekly, 27-period year | 27 | $2,222.22 |
| Semi-monthly | 24 | $2,500.00 |
| Monthly | 12 | $5,000.00 |
Converting a figure from one schedule to another is where the arithmetic goes wrong, because the intuitive multipliers are not the right ones.
| Conversion | Multiply by | The trap |
|---|---|---|
| Weekly → biweekly | 2 | This one really is 2. |
| Weekly → monthly | 4.3333 | Not 4. A month averages 4.33 weeks, not four. |
| Weekly → semi-monthly | 2.1667 | Not 2. That is 52 ÷ 24. |
| Biweekly → semi-monthly | 1.0833 | A semi-monthly cheque is about 8.3% larger. |
| Semi-monthly → biweekly | 0.9231 | A biweekly cheque is about 7.7% smaller. |
| Monthly → weekly | 0.2308 | That is 12 ÷ 52. |
Four weeks is not a month
The most common error in pay arithmetic is treating a month as four weeks. A month averages 4.3333 weeks. Multiply a weekly figure by 4 and you understate monthly income by about 7.7% — which across a year is roughly a full month of pay missing.
The number is 52 ÷ 12 = 4.3333. The same mistake in the other direction is multiplying weekly pay by 2 to get semi-monthly; that figure is 52 ÷ 24 = 2.1667.
Hours in a pay period
For a standard 40-hour week and a 2,080-hour year:
| Schedule | Hours per period | Basis |
|---|---|---|
| Weekly | 40 | 40 × 52 = 2,080 |
| Biweekly | 80 | 80 × 26 = 2,080 |
| Semi-monthly | 86.67 | 2,080 ÷ 24 — an average, not a count |
| Monthly | 173.33 | 2,080 ÷ 12 — an average, not a count |
The 86.67 figure deserves the caveat. Semi-monthly periods genuinely differ in length — one might contain ten working days and the next twelve. For salaried staff that is invisible. For hourly staff the hours in each period really do vary, and 86.67 is a planning average rather than something anyone works.
Where the annual figure itself matters, note that the federal convention is 2,087 hours rather than 2,080, for the same drift reason that produces the 27th pay period. That is explained on the work days in a year page.
Overtime follows the workweek, not the pay period
This is the most consequential thing about pay frequency for hourly staff, and it is where employers most often go wrong. Under the Fair Labor Standards Act, overtime is owed for hours over 40 in each individual workweek — a fixed, recurring 168-hour period. The pay period has nothing to do with it.
You cannot average across a two-week period
An employee works 50 hours one week and 30 the next. Eighty hours total, so no overtime owed?
No. That is ten overtime hours in the first week. The second week being short does not offset it. The hours are counted per workweek regardless of how the pay period is drawn around them.
This is the practical reason so many hourly employers land on biweekly. A biweekly period contains exactly two complete workweeks, so overtime is computed for each week and paid together, cleanly. A semi-monthly period cuts through the middle of a week, so the same week's hours are split across two pay runs and the calculation has to reach across the boundary. Semi-monthly stays popular for salaried-only workforces, where the problem never arises.
Common questions
How many pay periods are in a year?
52 weekly, 26 biweekly, 24 semi-monthly, or 12 monthly. Biweekly and weekly schedules occasionally produce 27 and 53 respectively, depending on the calendar and your first payday.
How many biweekly pay periods are in 2026?
26 for almost everyone. Only one of the fourteen possible payday positions produces 27 in 2026 — enter your own payday above to check.
Is biweekly the same as bimonthly?
No, and the word "bimonthly" is best avoided in payroll because it is genuinely ambiguous — it can mean twice a month or every two months. Biweekly is every 14 days, 26 times a year. Semi-monthly is twice a month, 24 times a year.
Does my employer have to pay me every two weeks?
Not under federal law, which sets no required frequency. Most states do set a minimum — commonly semi-monthly — and some set different rules for different types of work. Check your state labor office for the rule that applies to you.
How many weeks are in a pay period?
Weekly is one, biweekly is two, semi-monthly is about 2.17, and monthly is about 4.33. Only the first two are whole weeks, which is why only the first two align neatly with overtime.
Can semi-monthly ever have 25 periods?
No. It is pinned to dates rather than intervals, so twelve months times two paydays is always exactly 24.
Do I earn more in a 27-paycheck year?
Not if you are salaried. Your annual figure is fixed, so either each paycheck shrinks or the employer absorbs the difference. Hourly employees are paid for hours worked, so the question does not arise.
Sources
- U.S. Department of Labor, Wage and Hour Division — Handy Reference Guide to the Fair Labor Standards Act. Prompt payment on the regular payday, the absence of any federal minimum pay frequency, and the workweek as the basis for overtime.
- U.S. Department of Labor, Wage and Hour Division — State Payday Requirements. The state-level minimum frequency framework. Note that this table is not always current; confirm with your own state labor agency.
- U.S. General Services Administration — 2026 Payroll Calendar and the 2026 GSA Payroll Newsletter. The 27 pay periods in 2026, the final period ending December 26 and the last EFT date of December 31.
- USDA National Finance Center — pay period calendar, showing 26 pay dates in the same calendar year for agencies it services.
- Louisiana Division of Administration, Office of State Uniform Payroll — Memorandum 2022-46, 27 Pay Periods. The 10-to-12-year interval, and the framing that a 27th period is pay for work performed rather than an extra cheque.
- 5 U.S.C. § 5504 — biweekly pay periods and computation of pay, and the 2,087-hour divisor.
Every date on this page is computed from the calendar rather than copied from a published schedule. Change the year and the paydays recalculate.