California Overtime Law: 12-Hour Shifts, Breaks, and Pay Rules

Under California overtime law, a 12-hour shift pays your regular rate for the first eight hours, one and one-half times your regular rate for hours nine through twelve, and double your regular rate for any time past the twelfth hour.¹ This is a daily rule. It applies to that single workday no matter how many hours you have worked earlier in the week.

The Hour-by-Hour Math

Say you earn $20 per hour and work a straight 12-hour shift. Your pay for that day looks like this:

Hours 1–8 at $20: $160
Hours 9–12 at $30: $120
Shift total: $280

Without the daily overtime rule, the same 12 hours would pay $240. The extra $40 comes from those four overtime hours, and it is owed even if this is your first shift of the week.²

What Happens Past the Twelfth Hour

Every hour beyond the twelfth in a single workday must be paid at double your regular rate.¹ A 14-hour day at $20 an hour adds two hours at $40 on top of the $280 above, bringing the day to $360. The double-time rate applies to every minute past twelve, not just full additional hours. Stay twelve hours and twenty minutes, and those twenty minutes are paid at twice your regular rate.

The Regular Rate Isn’t Just Your Base Wage

All of the multipliers above run off your “regular rate of pay,” which is not necessarily your posted hourly wage. California folds most nondiscretionary compensation into the regular rate before the overtime multiplier is applied: shift differentials, production bonuses, attendance bonuses, and commissions all count.²

Here’s how that plays out. If you earn $20 an hour plus a $200 weekly production bonus and work 40 hours, your regular rate for the week is $25 ($800 base plus $200 bonus divided by 40 hours). Every overtime hour that week is then paid at 1.5 or 2 times $25, not $20. The regular rate can never fall below California’s minimum wage, which is $16.90 per hour as of January 1, 2026.³

Meal and Rest Breaks on a 12-Hour Shift

A 12-hour shift triggers two meal periods and three rest breaks under California law.

Your employer must provide a 30-minute meal break before you complete your fifth hour of work, and a second 30-minute meal break before you complete your tenth hour.⁴ There is a narrow exception written for shifts like this: if your total workday does not exceed 12 hours and you actually took the first meal break, you and your employer can mutually agree to waive the second meal break. That waiver is common in healthcare, manufacturing, and other industries built around 12-hour schedules.

Rest breaks are separate. California requires a paid 10-minute rest break for every four hours worked, which comes out to three rest breaks across a 12-hour day.⁵ These are on the clock and count as hours worked.

If your employer fails to provide a required meal period or rest break, they owe you one additional hour of pay at your regular rate for each workday the break was missed.⁶ Miss the meal break five shifts in a row and that is five extra hours of pay owed.

Weekly Overtime and the Seventh Day

The daily rule runs in parallel with a weekly one. Any hours over 40 in a workweek must be paid at 1.5 times your regular rate, even if none of them individually crossed the eight-hour daily threshold.¹ You don’t get paid twice for the same hour: if an hour already counted as daily overtime, it isn’t counted again under the weekly rule.

For someone working three 12-hour shifts in a week, that’s 36 hours total, so the weekly rule doesn’t come into play at all — the daily overtime is what matters. Add a fourth shift and you cross 40 hours, at which point the weekly rate catches anything not already covered by the daily calculation.

A separate trigger activates when you work all seven days of a workweek. On that seventh consecutive day, the first eight hours are paid at 1.5 times your regular rate, and every hour past the eighth is paid at double time, regardless of how many total hours you logged earlier in the week.² Your employer sets the fixed start day of the workweek. Changing that start day solely to avoid the seventh-day premium is a violation.

When Employers Can Skip Daily Overtime: Alternative Workweeks

An alternative workweek schedule (AWS) is the main way employers legally avoid paying time-and-a-half on shifts longer than eight hours. Under Labor Code Section 511, with the proper procedures, employees can work up to 10 hours per day within a 40-hour workweek without triggering daily overtime on hours nine and ten.⁷ This is the familiar four-day, 10-hour week.

Adopting one is not casual. The employer must provide a written proposal, hold a secret ballot election in which at least two-thirds of the affected employees vote yes, and report the results to the Division of Labor Standards Enforcement within 30 days.⁷ If any step is skipped or done wrong, the schedule is invalid and back pay at standard overtime rates is owed for every extra hour worked.

Even under a valid 10-hour AWS, protections stay: work beyond the regularly scheduled hours pays 1.5x, work beyond 12 hours in a day pays double time, and weekly overtime still applies past 40 hours.⁷

The 12-Hour AWS for Healthcare

Healthcare works under a different rule. Industrial Welfare Commission Wage Order 5 allows healthcare employers to adopt an AWS with shifts of more than 10 but not more than 12 hours per day, within a 40-hour workweek, without paying any daily overtime on those shifts.⁸ That is why three-day, 12-hour rotations are standard in hospitals and nursing facilities.

The remaining protections still bite. Double time is required for any hour past twelve in a day, and weekly overtime still applies past 40 hours. Hospitals face an added restriction: no employee assigned to a 12-hour shift can be required to work beyond 12 hours in a 24-hour period unless a Chief Nursing Officer or authorized executive declares a healthcare emergency, confirms reasonable staffing steps have been taken, and determines continued overtime is necessary.⁸ Employers must also make a reasonable effort to reassign anyone who voted for the schedule but cannot actually work the 12-hour rotation.

Who These Rules Cover

California’s overtime rules cover most hourly and salaried workers classified as non-exempt. Exempt employees, most commonly those in executive, administrative, or professional roles, must both perform specific duties and earn a salary of at least twice the state minimum wage for full-time work. For 2026, that minimum salary is $70,304 per year.³ Other exempt categories include outside salespeople, certain computer software professionals paid hourly, licensed physicians, and employees under a qualifying collective bargaining agreement.⁹

The salary test is the fastest filter. Earning less than $70,304 a year in 2026 means you almost certainly qualify for overtime regardless of your job title.

If You Aren’t Being Paid Correctly

Start with documentation. Write down your shift start and end times, when you took meal and rest breaks, and total hours per day. Save every pay stub. The more contemporaneous your records, the stronger any claim.

You can file a wage claim with the Labor Commissioner’s Office (also called the Division of Labor Standards Enforcement). Claims are accepted online, by email, by mail, or in person at a district office, and you have three years from the date of the violation to file.¹⁰ You do not need an attorney to file; the Labor Commissioner handles the investigation. You can also bring a private lawsuit to recover unpaid overtime along with attorney’s fees and interest.

1
California Legislative Information. California Code LAB 510 – Eight Hours of Labor Constitutes a Days Work
2
Department of Industrial Relations. Overtime
3
Department of Industrial Relations. Californias Minimum Wage Set to Increase to $16.90 Per Hour
4
California Legislative Information. California Labor Code Section 512
5
Department of Industrial Relations. Wages, Breaks and Retaliation
6
California Legislative Information. California Labor Code Section 226.7
7
California Legislative Information. California Code LAB 511 – Alternative Workweek Schedules
8
Department of Industrial Relations. Wage Order 5-02 – Wages, Hours and Working Conditions
9
Department of Industrial Relations. Exemptions From the Overtime Laws
10
Department of Industrial Relations. How to File a Wage Claim