Under California law, a workday is any consecutive 24-hour period that starts at the same time each calendar day, and a workweek is any seven consecutive days — 168 hours — that begin on the same calendar day each week. Both are set by Labor Code Section 500.1California Legislative Information. California Code Labor Code 500 – General These definitions matter because every overtime calculation in the state flows from them. Get the start times wrong, or let them drift, and the overtime math changes with them.
What Counts as a Workday
A workday does not have to begin at midnight. An employer can anchor it at 7:00 a.m., 3:00 p.m., or any other hour that fits operations. Once chosen, that start time stays fixed and governs every overtime calculation for employees on that schedule.
The workday is not the same thing as a shift. A shift is the block of time you actually work. The workday is the 24-hour administrative window your employer uses to measure your hours. If your employer’s workday starts at midnight and you work from 10:00 p.m. to 6:00 a.m., those eight hours split across two separate workdays: two hours in one, six in the other. That split can determine whether any of those hours cross a daily overtime threshold, which is why the start time matters more than most employees realize.
What Counts as a Workweek
The workweek does not have to run Sunday through Saturday. A restaurant might start its week at noon on Wednesday. A warehouse might choose Monday at 6:00 a.m. The only requirement is that the chosen start point stays fixed and repeats every seven days.
Because the workweek is the frame for weekly overtime, the exact start point can change whether a given stretch of hours triggers overtime or splits across two weeks. If an employer has not designated a specific workweek, enforcement agencies will typically apply a standard calendar week for audit purposes.
Setting and Changing These Periods
Both the workday and workweek must be set in advance and kept fixed. Employers cannot shift start times week to week for scheduling convenience. The Division of Labor Standards Enforcement allows an employer to change the workday or workweek, but only if the change is intended to be permanent.2Department of Industrial Relations. Workday and Workweek Temporary adjustments designed to dodge overtime obligations violate California law.
Legitimate changes should be documented and communicated to affected employees before they take effect. Updating the employee handbook and posting the new schedule are the standard approaches. The change cannot be retroactive. Hours already worked under the old schedule stay under the old schedule.
Employees who believe their employer manipulated workday or workweek definitions to avoid paying overtime can recover the full amount of unpaid overtime, plus interest, attorney’s fees, and court costs.3California Legislative Information. California Code Labor Code 1194 Courts and the Labor Commissioner look closely at the timing and justification for any change.
How Workday and Workweek Drive Overtime Pay
California uses both daily and weekly overtime triggers, which most states do not.
Daily overtime: hours beyond eight in a single workday are paid at one and one-half times your regular rate. Hours beyond 12 in the same workday jump to double your regular rate.4California Legislative Information. California Code Labor Code 510 These calculations are tied to the workday start time, not to when your shift begins. If parts of two separate shifts fall within the same 24-hour workday, those hours combine.
Weekly overtime: hours beyond 40 in the seven-day workweek are paid at time-and-a-half.5California Department of Industrial Relations. Overtime California also has a seventh-consecutive-day rule. If you work all seven days of a workweek, the first eight hours on that seventh day are paid at time-and-a-half, and any hours beyond eight on the seventh day are paid at double time.4California Legislative Information. California Code Labor Code 510
When daily and weekly overtime overlap for the same hours, the employer pays whichever rate is higher. They do not stack. The employer must apply the calculation that produces the greatest compensation for the employee.
Alternative Workweek Schedules
California allows a significant exception to the standard daily overtime rules. Under Labor Code Section 511, an employer can propose a schedule — most commonly four 10-hour days — that lets employees work up to 10 hours in a day without triggering daily overtime, as long as the total stays within 40 hours per week.6California Legislative Information. California Code Labor Code 511
The adoption process has teeth. An alternative workweek schedule only takes effect if at least two-thirds of the affected employees in a work unit approve it by secret ballot. The employer can propose a single fixed schedule or a menu of options that employees pick from weekly with employer consent. An employer cannot simply announce a new schedule and call it adopted.
Once an alternative schedule is in place, overtime rules shift to match it. An employee working under a 4/10 schedule earns overtime only after exceeding the regularly scheduled hours established by the agreement. Double time still applies beyond 12 hours in any workday and beyond eight hours on days worked outside the regular alternative schedule. Employers also cannot cut an employee’s hourly rate because of an alternative schedule adoption or repeal.
Employees who voted in the election but cannot work the alternative hours — due to a disability, religious observance, or similar reason — must be reasonably accommodated with a schedule of no more than eight hours per day.
Makeup Time
California allows employees to make up hours lost for personal reasons without triggering daily overtime, under strict conditions. Labor Code Section 513 requires the employee to submit a signed written request for each occasion. The employer cannot suggest or encourage it.7California Legislative Information. California Code Labor Code 513
The makeup hours must be worked in the same workweek the time was lost. As long as the employee stays under 11 hours in any single workday and under 40 hours for the workweek, those extra hours are not counted toward daily overtime. Cross either limit, and normal overtime rules apply.
Who Is Not Covered
Not every worker is covered by these daily and weekly overtime protections. Exempt employees receive a salary and do not earn overtime regardless of hours worked.
The most common exemptions are executive, administrative, and professional. Qualifying as exempt in California requires meeting both a salary test and a duties test. The salary floor is at least twice the state minimum wage for full-time work. With California’s minimum wage at $16.90 per hour as of January 1, 2026, that floor is $70,304 per year.8Department of Industrial Relations. California Minimum Wage Set to Increase to $16.90 Per Hour The duties test looks at how the employee actually spends their time: more than half must be on executive, administrative, or professional work as defined by the Wage Orders. A job title or description that sounds managerial is not enough.
Several other categories are also exempt from overtime:9California Department of Industrial Relations. Exemptions From the Overtime Laws
- Outside salespeople who regularly work away from the employer’s place of business making sales or obtaining contracts.
- Hourly computer professionals who meet specific duties requirements related to systems analysis, software development, or programming.
- Commission-based employees earning more than one and one-half times the minimum wage, whose income is more than half commissions, under certain Wage Orders.
- Unionized workers covered by collective bargaining agreements that provide premium overtime rates and a base hourly rate at least 30 percent above the state minimum wage.
- Certain drivers regulated by federal Department of Transportation hours-of-service rules.
If you are classified as exempt but do not actually meet both the salary and duties requirements, you are misclassified and entitled to overtime under the standard workday and workweek rules.
If Your Employer Got It Wrong
Employees who were not paid proper overtime because their employer misapplied the workday or workweek definitions can file a wage claim with the Labor Commissioner or bring a civil action. Labor Code Section 1194 entitles employees to recover the full amount of unpaid overtime, plus interest, reasonable attorney’s fees, and court costs.3California Legislative Information. California Code Labor Code 1194
Recordkeeping often decides these cases. California employers must keep accurate records of each nonexempt employee’s work periods, meal periods, split shift intervals, and total daily hours, tied to the employer’s established workday.10Cornell Law Institute. 8 CCR 11150 – Order Regulating Wages, Hours, and Working Conditions in Household Occupations When an employer cannot produce reliable records, courts and the Labor Commissioner tend to credit the employee’s account of hours worked.
Separate from wage recovery, if an employer willfully fails to pay all wages owed when an employee quits or is fired, waiting time penalties under Labor Code Section 203 can add up to 30 days of the employee’s daily pay on top of the unpaid wages.11California Department of Industrial Relations. Waiting Time Penalty That penalty applies at the end of the employment relationship, which gives employers a strong incentive to get the final paycheck — including any outstanding overtime — right.