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Is salary calculated by 26 days or 30 days? US payroll basics

February 12, 2026Taxes5 min read

By Helium Day Tax

Is salary calculated by 26 days or 30 days? Most employers use paychecks per year, not day-count months. Assistance from Helium Day Tax & CPAs.

Is salary calculated by 26 days or 30 days? US payroll basics

Is salary calculated by 26 days or 30 days?

In the United States, salary is rarely figured with a 26-day or 30-day month. Payroll systems, in general, leverage the number of paychecks in a year. Therefore, “26” generally points to a biweekly paycheck cycle.

What does “26” usually mean on a pay schedule?

It signifies payroll takes the annual salary & divides it by 26 in order to set the gross amount of each biweekly check.

General paycheck counts

  • Weekly: 52 checks
  • Biweekly: 26 checks
  • Twice a month: 24 checks
  • Monthly: 12 checks

Pay cycle

Checks per year

Simple gross-pay math

Weekly

52

annual salary ÷ 52

Biweekly

26

annual salary ÷ 26

Twice a month

24

annual salary ÷ 24

Monthly

12

annual salary ÷ 12

Why do some people use “30 days” in salary math?

It’s due to the “daily rate” contracts that treat a month as 30 days. In US payroll, day-based calculations appear more frequently as proration when someone starts mid-period or takes unpaid time & receives a final check.

If you necessitate a proration in line with the hours:

  1. Simply convert the annual salary to an hourly rate: annual salary ÷ 2,080
  2. Afterwards, multiply by the hours worked — or paid leave hours

How do I estimate net pay in Washington state?

Take the gross amount from the pay cycle into consideration, then factor in federal withholding and FICA as well as Washington payroll programs like the WA Cares Fund & Washington PFML. Specific positions might also present a Washington L&I deduction. Washington has no state personal income tax. Therefore, the state-related lines you see are generally these payroll premiums.

In case of leveraging a Washington Paycheck Calculator, the following items will be necessary:

  • Gross pay amount & pay cycle
  • W-4 filing details as well as any extra withholding
  • Pre-tax benefits — health plan, 401(k), HSA), if any

Contact Helium Day Tax & CPAs for professional aid

Want a second set of professional eyes on a paystub or withholding & Washington program deductions? Reach out to us to review the details.