How the Overtime Paycheck Calculator works
This tool applies the standard time-and-a-half method used under the U.S. Fair Labor Standards Act (FLSA) to estimate gross overtime pay. It splits your hours into a regular portion (paid at your normal hourly rate) and an overtime portion (paid at a multiple of that rate), then rolls the total up to whichever pay period you're paid on.
The formula
For an hourly rate R, regular hours H (up to 40 per week), overtime hours O, and an overtime multiplier M:
Regular pay = R × H
Overtime pay = R × M × O
Weekly gross pay = Regular pay + Overtime pay
The default multiplier is 1.5, commonly called "time-and-a-half." Some employers pay 2x ("double time") for hours worked on holidays or beyond a higher daily threshold, and a few union contracts or state laws specify even higher rates — this calculator lets you choose any of those multipliers.
Worked example
At a $25/hour rate with 40 regular hours and 5 overtime hours at 1.5x: regular pay is $25 × 40 = $1,000, and overtime pay is $25 × 1.5 × 5 = $187.50. Weekly gross pay is $1,187.50. Over a full year (52 weeks) that's roughly $61,750 in gross pay, before any taxes or deductions.
Converting to your pay period
Paychecks aren't always weekly. The calculator first finds weekly gross pay, then converts it to your actual schedule:
- Weekly: gross pay is unchanged — 52 paychecks per year.
- Bi-weekly: weekly gross × 2 — 26 paychecks per year.
- Semi-monthly: annual gross ÷ 24 — paid on two fixed dates each month, so the figure differs slightly from a bi-weekly check even though both feel "twice a month."
- Monthly: annual gross ÷ 12 — 12 paychecks per year.
What this calculator does not include
All figures here are gross pay — the amount earned before federal income tax, Social Security and Medicare (FICA), state and local taxes, health insurance premiums, and retirement contributions are withheld. Actual take-home pay will be lower. The calculator also assumes overtime is owed for every hour past 40 in a single workweek, which is the federal FLSA default for non-exempt employees; check your state's rules if it uses a different threshold (such as daily overtime after 8 hours) or your position is exempt from overtime rules entirely.