Daily Overtime and Double Time in California: Labor Code 510

Eight hours. Under Labor Code section 510(a), “Eight hours of labor constitutes a day’s work,” and California nonexempt employees earn time and a half for work past eight hours in a workday and double time past 12. Federal law looks only at the 40-hour week. A company that schedules four 10-hour shifts, or lets a shift run long without tracking it by the day, can owe daily overtime even when nobody works more than 40 hours. These claims add up quickly in a class action.

When does California require daily overtime?

Whenever a nonexempt employee works more than eight hours in a workday. Section 510(a) requires time and a half for “Any work in excess of eight hours in one workday and any work in excess of 40 hours in any one workweek and the first eight hours worked on the seventh day of work in any one workweek.”

The daily rule runs alongside the weekly one. An employee who works nine hours on Monday and six hours on each of the next four days works 33 hours for the week but is owed one hour of overtime for Monday. That’s the most common gap between California payroll and federal payroll.

Federal law doesn’t have a daily rule. The Fair Labor Standards Act requires overtime for an employee who works “a workweek longer than forty hours,” under 29 U.S.C. section 207(a)(1). Multistate employers that run California payroll on a federal model are the usual source of daily overtime claims.

How is a workday measured?

As a fixed 24-hour period, not a calendar day. Labor Code section 500(a) defines “workday” as “any consecutive 24-hour period commencing at the same time each calendar day.” A workweek is “any seven consecutive days, starting with the same calendar day each week,” under section 500(b).

That definition matters for overnight work. If a company’s workday runs from midnight to midnight, an employee who works 6 p.m. to 2 a.m. and then returns at 10 a.m. the next morning may have worked more than eight hours inside one 24-hour period. The way payroll defines the workday can create or eliminate overtime on those shifts.

The safer practice is to set the workday start in writing and leave it alone. A workday definition that moves around, or that payroll applies differently from what the handbook says, invites the argument that the company chose it to avoid overtime.

When does double time apply?

After 12 hours in a day, and after eight hours on the seventh consecutive day of the workweek. Section 510(a) provides that “Any work in excess of 12 hours in one day shall be compensated at the rate of no less than twice the regular rate of pay for an employee.”

The statute also avoids stacking. It says “Nothing in this section requires an employer to combine more than one rate of overtime compensation in order to calculate the amount to be paid to an employee for any hour of overtime work,” according to section 510(a). An hour that qualifies for both time and a half and double time is paid at the higher rate, not both.

The seventh-day rules come with their own questions about day-of-rest obligations and when the seventh day is reached. Those are separate from the daily rule discussed here.

Can an employer schedule 10-hour shifts without daily overtime?

Only under a valid alternative workweek schedule. Section 510(a) says its daily overtime requirements “do not apply to the payment of overtime compensation to an employee working pursuant to” an alternative workweek adopted under section 511, one adopted through a collective bargaining agreement under section 514, or one exempt under section 554.

Without one of those, a four-day, 10-hour schedule owes two hours of daily overtime per shift, or eight hours a week per employee. Employers that adopted a “4/10” schedule informally, or that let one department copy another department’s schedule without its own election, often discover the problem in a demand letter.

Alternative workweek elections have strict procedural requirements, and a defective election generally leaves the employer exposed to daily overtime for every shift worked under it. That process deserves its own review before any long-shift schedule starts.

How do daily overtime claims usually start?

Usually from records, not complaints. A plaintiff’s lawyer who obtains time punches can calculate daily overtime for every employee and every day in the class period, and a few patterns show up again and again.

Long shifts paid at straight time are the simplest. A 13-hour shift at a $25 regular rate costs $400 under section 510: $200 for the first eight hours, $150 for the next four at $37.50, and $50 for the last hour at double time. Paying $325 in straight time leaves $75 unpaid on that shift alone.

Work outside the punches is the next pattern. Pre-shift security checks, post-shift cleanup, or calls answered after clocking out can push a shift from eight hours to nine. A one-hour difference on one day is small, but it becomes overtime for each affected employee, and wage statement and final pay claims usually follow.

The regular rate is the third. Daily overtime is paid at a multiple of the regular rate, so a nondiscretionary bonus or shift differential left out of the rate produces an underpayment on every overtime hour, daily or weekly.

What can an employee recover on a daily overtime claim?

The unpaid overtime with interest, plus attorney fees. Labor Code section 1194(a) lets an employee who received less than “the legal overtime compensation” recover the unpaid balance, “including interest thereon, reasonable attorney’s fees, and costs of suit.” Fee shifting under that section runs only to employees.

Liquidated damages don’t apply to overtime. The liquidated damages statute, section 1194.2(a), covers minimum wage claims and adds that “Nothing in this subdivision shall be construed to authorize the recovery of liquidated damages for failure to pay overtime compensation.” Plaintiffs sometimes plead them anyway, and that request is worth challenging early.

Derivative claims carry most of the risk. Unpaid overtime can support claims for inaccurate wage statements and for waiting time penalties at separation, along with PAGA penalties. The underlying overtime calculation drives the value of each one.

Next steps when a demand letter alleges unpaid daily overtime

Daily overtime is a math problem, and the defense starts with the employer’s own data. The firm’s page for employment defense attorneys in California has more on how these claims are handled.

1. Preserve the time punches and payroll registers with the matching wage statements and schedules. Keep any alternative workweek election records, along with the emails and texts of the supervisors who set or approved hours.
2. Calendar the response deadline on the demand, PAGA notice, or complaint, and check for an arbitration agreement and an EPLI policy that requires notice.
3. Identify the payroll staff and supervisors who know how the workday was defined and how long shifts were paid, and avoid any action against the employee who raised the claim.
4. Rerun a sample of the plaintiff’s shifts against section 510, using the company’s actual workday definition and regular rate, to see whether the claimed shortfall is real.
5. Get legal advice before changing schedules, making back payments, or responding to the demand, because each of those steps can affect the class and PAGA exposure.

Daily overtime questions

Do exempt employees get daily overtime?

No, if they are properly classified. Daily overtime applies to nonexempt employees. An employer that pays a salary to someone who doesn’t meet the duties and salary tests for an exemption can owe daily overtime for every long day that employee worked, so misclassification claims often carry a daily overtime component.

Can an employee waive daily overtime?

No. California overtime rights can’t be waived by individual agreement. An employee who asks to work longer days in exchange for a shorter week still earns daily overtime unless the company has a valid alternative workweek schedule or a qualifying union agreement. Separate makeup time rules apply in narrow circumstances.

Does a long lunch break reset the workday?

No. A meal period that is off duty isn’t counted as hours worked, but it doesn’t start a new workday. Only the hours worked inside the same 24-hour workday count toward the eight-hour and 12-hour thresholds.

Does daily overtime apply to part-time employees?

Yes. A part-time employee who works a single 10-hour day earns two hours of daily overtime even if the weekly total is well under 40. Employers with part-time staff who pick up occasional long shifts should check that payroll calculates overtime by the day.

If your company faces a daily overtime claim

If your company has received a demand letter, PAGA notice, or class action complaint alleging unpaid daily overtime, the time records and the way payroll defines the workday usually decide how much of the claim holds up. Rosenberger + Kawabata represents employers defending employment lawsuits and claims through its business litigation practice, including claims involving unpaid daily overtime and double time. Contact Rosenberger + Kawabata online for a confidential consultation, or call (310) 894-6921.

Sources

The statutes are Labor Code section 500, section 510, section 1194, section 1194.2, and 29 U.S.C. section 207.

This post is general information about California and federal employment law as of November 7, 2026. It is not legal advice, and reading it does not create an attorney-client relationship. Employment statutes, regulations, and court decisions change often, and the outcome of any claim depends on its facts. Past results do not guarantee future outcomes.