Your accounting firm's payroll frequency and pay schedule determine more than the direct deposit date. It shapes how overtime accrues during tax season, whether your payroll obligations align with incoming client payments, and how cleanly December 31 closes. Biweekly and semi-monthly are both well-established in professional services — here’s how to choose between them for your team.
SurePayroll® By Paychex runs either schedule once you set it, so the choice comes down to what fits your firm.
Biweekly vs. semi-monthly: what changes at the firm level
Biweekly pay runs every two weeks — always on the same day of the week, 26 times a year. Two months will produce three biweekly pay periods instead of two.
Semi-monthly pay runs twice per month on fixed calendar dates — 24 times a year. Common pairings: the 1st and 15th, or the 15th and the last business day of the month.
The difference in pay period count has real downstream effects. With biweekly pay, each period covers exactly two full workweeks. Overtime calculations are built in: hours over 40 in any workweek trigger the 1.5x rate. With semi-monthly pay, each period spans 15 or 16 calendar days, which doesn’t align with the standard workweek. You can run semi-monthly payroll with hourly staff — you just need timesheet records or a timekeeping system that tracks overtime by workweek on a separate schedule from the pay run.
For firms with primarily salaried associates, the distinction is smaller. For firms with hourly bookkeepers, administrative staff, or seasonal support, confirm how your timekeeping handles overtime before you commit to a schedule.
What federal law requires
The Fair Labor Standards Act (FLSA) generally does not mandate a specific pay frequency for private-sector employees. Federal law requires that you pay employees on a regular, consistent schedule — but biweekly, semi-monthly, weekly, and (in some states) monthly schedules all satisfy that standard.
What the FLSA does govern is overtime. For non-exempt employees, hours over 40 in a workweek trigger the 1.5x rate. The pay schedule doesn’t change that math — it only determines when you run the calculation. You choose the schedule. Tracking workweek overtime correctly is required regardless — it’s a condition of federal labor laws, not the pay schedule.
State minimums: where to look before you commit
Some states set minimum pay frequency laws that go beyond the federal standard, and requirements vary considerably. Most require at least semi-monthly pay for private-sector employees. Some require weekly pay for hourly workers in certain industries. A few permit monthly pay with employee consent.
Accounting firms that operate across state lines — or carry remote team members in different states — need to verify minimum frequency requirements for every state where employees work, not just where the firm is incorporated. Requirements can also differ for salaried versus hourly employees within the same state.
The Department of Labor publishes state laws on pay frequency at dol.gov/agencies/whd/state/payday. Start there, then confirm with qualified employment counsel for your specific situation.
Tax season is the stress test for your pay schedule
In the financial activities sector, 37.4% of workers are paid biweekly and 30.2% are paid semi-monthly, according to the U.S. Bureau of Labor Statistics National Compensation Survey (2023). Both are well-established. For accounting firms, the distinction that matters is how each holds up during the periods that define your calendar.
January through April. This is your high-water mark. If you bring on seasonal support staff or have associates logging overtime during the push, the pay schedule shapes how that overtime accrues and how much tracking your payroll process requires. Biweekly payroll handles overtime by design — each pay period is two clean workweeks. Semi-monthly requires tracking workweek overtime on a separate layer, even when the pay run doesn’t land on a workweek boundary.
December. Both schedules converge on December 31 as a close-out deadline, but they get there differently. Semi-monthly always closes at exactly 24 pay periods, which simplifies year-end accruals, payroll tax reconciliation, and W-2 totals. Biweekly occasionally produces a 27th pay period depending on the calendar, which requires attention during year-end reconciliation.
The off-peak months. Your pay schedule runs whether it’s mid-April or mid-August. Whichever cadence you choose needs to be operationally sustainable for your admin workload at its lowest-capacity point, not just at peak.
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Biweekly pay: the cleaner option when your staff hours vary
Biweekly payroll runs on the same weekday every two weeks — 26 pay periods per year, with two months producing three biweekly pay periods.
For firms with a mix of salaried associates and hourly support staff, biweekly is typically the lower-friction option. Each pay period aligns with two complete workweeks, so overtime tracking follows the same rhythm as payroll processing. No workweeks split across pay period boundaries. No separate calculation layer.
For salaried employees, the math is annual salary divided by 26. Each paycheck is slightly smaller than a semi-monthly equivalent, but employees receive pay more frequently. The three-paycheck months aren’t a windfall or an anomaly — they’re funded from the same payroll obligations you’d have regardless, spread across an extra run.
Semi-monthly pay: a schedule that maps to how accounting firms bill
Semi-monthly pay runs on fixed calendar dates — 24 times a year. Common structures: the 1st and 15th, or the 15th and last business day of the month.
Calendar-anchored dates align with monthly accounting close. If your firm tracks billable hours, expenses, bookkeeping, and client payments by the calendar month, semi-monthly payroll fits that same grid. Payroll runs on known dates; month-end numbers close predictably.
For salaried employees, each paycheck is slightly larger than a biweekly equivalent — annual salary divided by 24. The calendar date format is also more predictable for employees who manage personal expenses around fixed monthly costs.
For hourly staff, semi-monthly requires a timekeeping system that flags workweek overtime independently of the pay period schedule. If your system handles this automatically, it’s manageable. If it doesn’t, biweekly is the lower-friction path for your hourly staff.
Net-30 billing, fixed payroll dates, and how to make them work together
For accounting firm owners, the mismatch between client billing cycles and payroll obligations is one of the most consistent cash flow pressure points. Clients pay monthly or net-30. Your team needs to be paid on a regular schedule regardless.
Semi-monthly payroll on fixed dates — especially the 15th and last business day — maps directly onto a monthly cash flow model. You know when the obligations land; you can time retainer collections, invoice follow-ups, and budget around the calendar.
Biweekly pay on a recurring weekday cycle produces more frequent but smaller obligations. That can spread cash pressure, but it also makes calendar-month cash flow management and budgeting less predictable.
Whichever cadence you choose, SurePayroll runs it on your schedule — no manual recalculation needed each pay period.
Making the call for your firm
Run through three questions:
- Is your staff primarily salaried or hourly? Salaried-majority firms can operate cleanly on either schedule. Hourly-majority or mixed teams benefit from biweekly — each pay period aligns with two workweeks, and overtime tracks without a separate layer.
- How does your billing cycle run? Monthly billing and net-30 collections pair with semi-monthly payroll. Fixed payroll dates map to fixed billing dates; you model cashflow on a calendar grid. If your billing is more variable, semi-monthly still provides a stable payroll anchor?
- Do you have employees in multiple states? If so,verify minimum frequency requirements for every state before committing. Most states permit semi-monthly; some require weekly pay for hourly employees. Start with the DOL state payday page and confirm with employment counsel.
The right schedule is the one that holds up through your busiest quarter and fits how your cash flow runs.
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Setting up your schedule with SurePayroll
Choose your payroll frequency, set the first pay date and processing cutoff, and confirm the pay period calendar for the year.
From there, SurePayroll® By Paychex handles the calendar math — including year-end close, any three-paycheck months in a biweekly cycle, and the December 31 reconciliation run. If your team includes salaried associates and hourly support staff, both run on the same account and the same schedule.
This content is for educational purposes only, is not intended to provide specific legal advice, and should not be used as a substitute for the legal advice of a qualified attorney or other professional. The information may not reflect the most current legal developments, may be changed without notice and is not guaranteed to be complete, correct, or up to date
