Federal (FLSA)
What the calculator does: 1.5× the hourly rate for hours over 40 in each fixed 168-hour workweek, each workweek on its own, also inside biweekly and semi-monthly periods. Hours worked after the workweek boundary belong to the next workweek.
Conditions: Non-exempt employees. The rate you enter is used as the regular rate; bonuses and shift differentials can raise the FLSA regular rate. An employer may pay a whole boundary shift in the week it began only if that never lowers overtime.
California
What the calculator does: Per workday: 1.5× over 8 hours, 2× over 12. Per workweek: 1.5× once 40 regular hours are reached (daily overtime hours are not counted again). Seventh day: only when all seven days of the workweek are worked; 1.5× for its first 8 hours, 2× after.
Conditions: Non-exempt employees. Not for alternative workweek schedules (Labor Code 511) or union contracts with their own overtime terms. Unless the employer set others, the workday starts at midnight and the workweek at midnight Sunday. With rounding on, only the day’s first In and last Out are rounded: meal-period punches may not be rounded in California.
Alaska
What the calculator does: 1.5× over 8 hours in a fixed 24-hour workday, and over 40 hours a week counted without the daily overtime hours. Optional 10-hour daily limit for a voluntary flexible work hour plan.
Conditions: Employers with 4 or more employees. Exemptions include agriculture, seamen, some hospital and transport work. A flexible plan must be signed and filed with the Department of Labor.
Nevada
What the calculator does: 1.5× over 40 hours a week, and over 8 hours in a workday that starts when you begin work and lasts 24 hours, if you earn less than $18.00 an hour. Daily and weekly overtime don’t stack: the greater applies.
Conditions: Daily overtime needs pay under 1.5× the minimum wage ($12.00 since July 1, 2024) and no mutually agreed 4 × 10 schedule. Many exemptions, including businesses with gross sales under $250,000 a year.
Colorado
What the calculator does: 1.5× over 40 hours a workweek, over 12 hours a workday, or over 12 consecutive hours across midnight, whichever pays more. An unpaid gap of 30 to 60 minutes between punches is treated as a meal period (left out of the 12 hours); a shorter gap counts toward them, and a longer one ends the stretch.
Conditions: All employers, no size threshold; exempt employees and some industries are excluded (Rule 2). Meal periods may be subtracted from the 12 consecutive hours only if they meet Rule 5.1: duty-free and at least 30 minutes (Rule 4.1.5). The calculator assumes gaps of 30 minutes or more are such meal periods. Rule 4.1.1(C) as published leaves out the number; Rules 4.1.5 and 4.2 say 12 consecutive hours.
Rounding
What the calculator does: Rounds every punch to the nearest 5, 6 or 15 minutes and shows punched against paid time. With 15 minutes, 1–7 minutes round down and 8–14 round up (the 7-minute rule); with 6 minutes, 3 rounds up.
Conditions: Allowed only if, over time, it doesn’t underpay employees for time actually worked. Your employer’s policy decides whether and how punches are rounded. In California, meal-period punches may not be rounded (Donohue, 2021), and whether an employer that records exact times may round at all is before the California Supreme Court in Camp v. Home Depot, still pending on the court’s April 24, 2026 list.
Breaks
What the calculator does: The unpaid break box takes minutes out of the middle of the day’s worked time, and warns about breaks under 20 minutes or a break on a day without punches. Enter only unpaid meal breaks; short rest breaks are paid time.
Conditions: Rest breaks of 5 to about 20 minutes count as hours worked; a bona fide meal period (ordinarily 30 minutes or more, fully relieved of duty) does not. State break rules vary.
Daylight saving time
What the calculator does: With US rules on, a shift over the November change counts the repeated hour (10 PM to 6 AM is 9 hours) and a shift over the March change loses one (7 hours).
Conditions: Arizona (outside the Navajo Nation), Hawaii and the territories don’t observe DST: choose None.
No tax on overtime
What the calculator does: Tallies the qualified overtime premium: hours over 40 in each workweek × ½ × the hourly rate, whatever state rule applies.
Conditions: Tax years 2025–2028. Deduction up to $12,500 ($25,000 joint), reduced by $100 per $1,000 of modified AGI over $150,000 ($300,000 joint). State-only overtime and pay above time-and-a-half don’t qualify. Valid SSN needed; married couples must file jointly.
Rules and sources checked on September 25, 2026. The calculator states the rules and does the arithmetic; it isn’t legal or tax advice. Exemptions, union contracts and your employer’s written policies can change what applies to you.