PAYROLL GLOSSARY
Pay Period
Definition: A pay period is the recurring block of time an employer uses to measure wages before issuing a paycheck.
Common pay periods include weekly, biweekly, semi-monthly, and monthly. The pay period matters because payroll does not just divide salary into equal checks; it also uses the pay period to apply the correct withholding table. IRS Publication 15-T has separate schedules and worksheets for each payroll period so federal withholding tracks the right annualized wage amount.
That is why the same annual salary can produce different paycheck amounts under different frequencies. A $100,000 salary paid 24 times per year looks different on each check than the same salary paid 26 times per year, and the withholding table changes with it. Comparing two jobs without matching the pay period can produce a misleading result.
If you want the cleanest comparison, hold gross salary, filing status, and deductions constant, then change only the pay period. That shows how payroll timing changes each check without changing the annual compensation.