You can legally work 24 hours straight in California. No state law caps the number of hours an adult non-exempt employee can work in a single day, so the shift itself is allowed. What California does regulate, aggressively, is what the shift costs: daily overtime and double-time pay, mandatory meal and rest breaks, and rules that usually require sleep time to be paid. Between those three, a full 24-hour shift ends up costing an employer close to double what the base hourly rate would suggest, and skipping any piece of the framework triggers separate penalties.
What You’re Owed for 24 Straight Hours
California calculates overtime by the day, not just the week. A workday is any consecutive 24-hour period that begins at the same time each calendar day, and premium pay kicks in based on how many hours fall inside that window.1Department of Industrial Relations. Workday and Workweek Under Labor Code section 510, a non-exempt employee is paid:
- Hours 1 through 8 at the regular rate.
- Hours 9 through 12 at one and a half times the regular rate.
- Every hour past the twelfth at double the regular rate.2California Legislative Information. California Code LAB 510 – Eight Hours of Labor Constitutes a Days Work
Run the numbers on a $20-an-hour worker. The first eight hours pay $160. The next four, at $30 an hour, pay $120. The final twelve hours, at $40 an hour, pay $480. That’s $760 for one shift, against $480 if all 24 hours had been paid at the base rate.
Daily overtime is separate from weekly overtime. Even if you haven’t crossed 40 hours for the week, going past eight in one day triggers the premium. This is why 24-hour shifts are less common in California than in states that follow only the federal 40-hour weekly rule.
Breaks You’re Owed During the Shift
Two 30-minute meal breaks are mandatory. The first is required once you work more than five hours; the second, once you work more than ten. Labor Code section 512 does not add a third or fourth for longer shifts. Meal periods are unpaid only when you are fully relieved of duties for the entire 30 minutes. If the job requires you to stay on-site and remain responsive, an on-duty meal period can be used, but only with a written agreement, and the time counts as hours worked and must be paid.3Division of Labor Standards Enforcement. Meal Periods On a 24-hour shift, on-duty meals are often the practical reality.
Meal-break waivers exist, but neither applies here. The first meal can be waived only when the whole shift is six hours or less; the second, only when the shift is twelve hours or less and the first was taken.4U.S. Department of Labor. Minimum Length of Meal Period Required under State Law for Adult Employees in Private Sector A 24-hour shift is too long for either waiver.
Rest breaks are separate and paid. The Industrial Welfare Commission’s wage orders require a 10-minute paid rest break for every four hours worked or major fraction thereof. That comes out to six rest breaks over a 24-hour shift, ideally falling near the middle of each four-hour block. You have to be relieved of duty during the break, though the employer isn’t required to let you leave the premises.
The penalty for skipping a break is one extra hour of pay at your regular rate for each workday a required meal period isn’t provided.3Division of Labor Standards Enforcement. Meal Periods A separate one-hour premium applies for each workday a required rest break is missed. They stack: miss both on the same day and the employer owes two extra hours.
Does Sleep Time Count as Work?
For a shift of exactly 24 hours or less, yes. All time the employee spends under the employer’s control is compensable, including time spent sleeping. The California Supreme Court reinforced this in Mendiola v. CPS Security Solutions (2015), holding that on-call hours during which security guards had to remain at the worksite counted as hours worked even when the guards were asleep.
An employer can exclude sleep time only when the shift exceeds 24 hours, and only if every one of the following is true:
- The employer and employee have a written agreement to exclude a regularly scheduled sleep period.
- No more than eight hours of sleep are excluded.
- The employer provides adequate sleeping facilities.
- The employee actually gets at least five consecutive hours of sleep.
If sleep is interrupted for work duties, the interrupted time must be paid. If the employee cannot get five uninterrupted hours, the entire sleep period becomes compensable. Miss any single condition and all sleep hours are paid. For a shift of exactly 24 hours, no sleep deduction is available at all under state law, even with a signed agreement in place.
Jobs With Different Rules
A few occupations operate under modified wage-order rules. The overtime and break structure above is the default; check your industry before assuming it applies.
Ambulance drivers and attendants. Under IWC Wage Orders 5 and 9, workers scheduled for 24-hour shifts can agree in writing to exclude up to three one-hour meal periods and a regularly scheduled, uninterrupted sleep period of up to eight hours from paid time. The employer has to provide adequate sleeping and kitchen facilities, and the employee has to get at least five uninterrupted hours of sleep. If any condition fails, all sleep hours revert to paid time.5Department of Industrial Relations. DLSE Opinion Letter 1998.05.29 – Exclusion of Sleep Periods from Hours Worked Under the Ambulance Driver and Attendant Provisions of IWC Orders 5-98 and 9-98
Live-in personal attendants. Caregivers covered by the Domestic Worker Bill of Rights earn overtime after nine hours in a day or 45 in a week, not eight and 40. Double-time obligations after 12 hours still apply.
Union-covered employees. A collective bargaining agreement can modify meal-break rules under Labor Code section 512(e) if the contract pays at least 30 percent above state minimum wage, expressly addresses meal periods, and provides binding arbitration of disputes over them. The section 512(e) exception is limited to construction, certain utilities, commercial driving, and security; separate CBA exemptions exist for wholesale baking, motion picture production, broadcasting, and public transit bus drivers. Daily overtime under section 510 still applies unless the employer has adopted a valid alternative workweek schedule.
If Your Employer Skips Any of This
Keep your own hours. Write down when you clock in, when each break starts and ends, and when you finish. Employers are required to keep accurate time records, but when the records are in dispute, your log can decide the outcome.
If overtime is short, breaks are skipped, or sleep time isn’t paid when it should be, you can file a wage claim with the Division of Labor Standards Enforcement, the office of the California Labor Commissioner. You can also sue directly in civil court. Claims for unpaid wages generally have to be filed within three years, or four if the claim includes a breach of a written contract. Recovery can include the unpaid wages, waiting-time penalties, interest, and attorney’s fees, which is why most employment lawyers take these cases on contingency.