Pay Period

The recurring schedule on which employees are paid — weekly, biweekly, semimonthly, or monthly — each with different cash-flow implications.

A pay period is the recurring time span for which an employee's wages are calculated and paid. The four most common schedules are weekly (52 paychecks per year), biweekly (26 paychecks per year, every two weeks), semimonthly (24 paychecks per year, twice a month — usually the 1st and 15th or 15th and last day), and monthly (12 paychecks per year). The choice of pay period affects how much each individual paycheck is worth, how deductions are calculated, and how employees manage cash flow.

The most commonly confused pair is biweekly vs. semimonthly. Biweekly means every two weeks on the same day (e.g., every other Friday) — this produces 26 paychecks per year, and two months per year will have three paydays instead of two. Semimonthly means twice per calendar month on fixed dates — this produces exactly 24 paychecks per year, always the same calendar dates. For a $100,000 annual salary: biweekly paychecks are $3,846.15 (÷26); semimonthly paychecks are $4,166.67 (÷24). The annual total is identical, but the per-check amount and dates differ.

Pay period matters for budgeting and benefits deductions. Health insurance, 401(k), and other benefit deductions are often set as a fixed dollar amount per paycheck — so the same annual premium spread over 26 biweekly checks is a smaller per-check deduction than over 24 semimonthly checks. Biweekly employees get 'bonus' paychecks in the two three-paycheck months. Understanding your schedule helps you plan rent, mortgage, and subscription payment timing.