12-Hour Shifts and Overtime in California: Alternative Workweek Rules

In California, a 12-hour shift normally earns 8 hours of regular pay plus 4 hours of overtime at time and a half, unless your employer has a valid alternative workweek schedule (AWS) that allows 12-hour days at straight time. Either way, every hour beyond 12 in a single workday must be paid at double time.

The difference is large. A nurse earning $60 an hour who works three 12-hour shifts a week without a valid AWS is owed about $360 a week in daily overtime, or roughly $18,000 over a 50-week year. That is why the validity of the AWS election is often the first thing we check.

This guide explains California’s daily overtime rules, how an alternative workweek must be adopted, the special rules for healthcare workers, meal and rest breaks on long shifts, common employer mistakes, deadlines, and what to do if you think your overtime is being shorted.

California’s daily overtime rules

California is one of the few states that requires overtime by the day, not just by the week. Under Labor Code 510, non-exempt employees must be paid:

• 1.5× the regular rate for hours over 8 in a workday, over 40 in a workweek, and for the first 8 hours on the seventh consecutive day of work in a workweek.
• 2× the regular rate for hours over 12 in a workday and for hours over 8 on the seventh consecutive day.

Without a valid AWS, a standard 12-hour shift therefore includes 8 regular hours and 4 overtime hours. The fact that you work only three days a week, or under 40 hours, does not change that.

Your “regular rate” is not just your base hourly wage. It generally includes shift differentials, nondiscretionary bonuses and certain incentive pay. In Alvarado v. Dart Container Corp. (2018), the California Supreme Court held that a flat-sum bonus must be factored into the regular rate in a way that does not dilute it. Night, weekend and charge differentials are common in healthcare and must be included.

Key fact

What an alternative workweek schedule is

An alternative workweek schedule allows employees to work longer days without daily overtime, within a 40-hour week. The common examples are four 10-hour days (“4/10s”) or, in healthcare, three 12-hour days. Labor Code 511 and section 3 of the IWC wage orders permit these schedules only if strict procedures are followed.

Under a valid AWS, you are generally paid straight time for the regularly scheduled hours, but overtime still applies:

• 1.5× for work beyond your regularly scheduled hours under the AWS, and for work over 40 hours in the week.
• 2× for work over 12 hours in a day, and for work over 8 hours on days beyond the number of regularly scheduled workdays.

In most industries, an AWS can schedule days of up to 10 hours. The healthcare wage orders allow regularly scheduled shifts of up to 12 hours, which is why 12-hour schedules are so common in hospitals and other healthcare settings.

The wage orders also say that an employer may not reduce your regular hourly rate because an AWS is adopted, repealed or invalidated.

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How an AWS must be adopted

An AWS is only as good as the election that created it. Under section 3(C) of the wage orders, a valid AWS generally requires:

1. A defined work unit. The employer must propose the schedule to an identifiable group of affected employees, such as a department or shift.
2. Written disclosure. Before the vote, the employer must disclose in writing the effects of the proposed schedule on employees’ wages, hours and benefits.
3. A meeting at least 14 days before the vote to discuss those effects. The disclosure must also be provided in a non-English language if at least 5% of affected employees primarily speak that language.
4. A secret ballot vote, held during regular working hours at the worksite, with approval by at least two-thirds of the affected employees, before the schedule takes effect.
5. Reporting. The results must be reported to the Department of Industrial Relations within 30 days after the results are final.

If one-third of the affected employees petition to repeal the AWS, a new secret ballot election must generally be held, and a two-thirds vote is needed to reverse it. Employers must also make a reasonable effort to find a different schedule for employees who cannot work the alternative schedule.

The Department of Industrial Relations maintains a searchable public database of AWS election results that employers have reported. If your employer’s election isn’t there, that is worth asking about.

12-hour shifts in healthcare

Hospitals and other healthcare employers are covered by Wage Order 4 or Wage Order 5. Section 3(B)(8) of those orders allows healthcare employers to adopt an AWS with regularly scheduled 12-hour shifts within a 40-hour week. Under that provision, hours over 12 in a workday must be paid at double time, and hours over 40 in a workweek at time and a half.

The healthcare wage orders also limit how long you can be required to work:

• An employee on a 12-hour AWS shift generally cannot be required to work more than 12 hours in a 24-hour period unless the chief nursing officer or an authorized executive declares a healthcare emergency and other conditions are met.
• No employee can be required to work more than 16 hours in a 24-hour period unless by voluntary mutual agreement.
• No employee may work more than 24 consecutive hours without at least 8 consecutive hours off immediately afterward.

Registered nurses employed to practice nursing are generally not exempt from overtime, even though nursing is a licensed profession. Under Labor Code 515(f), an RN is exempt only if the RN individually meets the executive or administrative exemption, with limited exceptions for certain advanced practice nurses. Our guide on misclassification as exempt explains those tests.

💡 Example: Ana is a nurse who earns $60 an hour and works three 12-hour shifts a week. If her unit never held a valid AWS election, each shift includes 4 overtime hours, or 12 a week. The overtime premium is $30 an hour (half her rate on top of straight time), so she is owed 12 × $30 = $360 a week, about $18,000 over 50 weeks. Even under a valid AWS, if she is held over to work 14 hours one day, the last 2 hours must be paid at double time: 2 × $120 = $240.

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Meal and rest breaks on long shifts

Long shifts come with more break rights. For a 12-hour shift, California generally requires:

• Three paid 10-minute rest breaks, one for every four hours worked or major fraction of four hours.
• Two unpaid 30-minute meal periods, the first before the end of the fifth hour and the second before the end of the tenth hour (Labor Code 512).

Outside healthcare, a second meal period can be waived only if the shift is no more than 12 hours and the first meal was not waived. Healthcare workers have a special rule: under section 11(D) of Wage Orders 4 and 5, employees in the healthcare industry who work shifts over 8 hours may voluntarily waive one of their two meal periods, even on shifts longer than 12 hours. The waiver must be in a written agreement signed by both sides, and you can revoke it with one day’s written notice. California courts have upheld that rule.

When a required break is missed, short or late, you are generally owed one extra hour of pay at your regular rate of compensation for each workday (Labor Code 226.7; Ferra v. Loews Hollywood Hotel). See our guide to meal and rest break premiums.

By the numbersTwo-thirds

Common AWS violations

Problem	Why it matters	What may be owed
No secret ballot election, or no two-thirds approval	The AWS is invalid	Daily overtime after 8 hours
No written disclosure or 14-day meeting	Procedural requirement not met	Daily overtime after 8 hours
Results never reported to the state	Reporting requirement not met	Can support an invalidity claim
Schedule changes week to week	An AWS must be “regularly scheduled”	Overtime beyond 8 on irregular days
Hours over 12 paid at 1.5×	Double time is required	The unpaid half-time difference
Differentials left out of the overtime rate	Regular rate is too low	Underpaid overtime on every OT hour

Other common problems include applying an AWS adopted for one unit to employees who transferred in from another, and shifting employees between AWS and non-AWS schedules without paying overtime correctly.

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Deadlines and what you can recover

Unpaid overtime claims generally must be brought within three years (Code of Civil Procedure 338), or up to four years under the Unfair Competition Law (Business and Professions Code 17208). You can recover the unpaid overtime and double time, interest, and reasonable attorney’s fees and costs (Labor Code 1194). Penalties for inaccurate wage statements (Labor Code 226(e)) and waiting-time penalties for former employees (Labor Code 203) may also apply.

An invalid AWS usually affects an entire unit, so these claims are commonly brought as class actions or under PAGA.

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What to do if your overtime looks wrong

1. Ask for the AWS documents: the written disclosure, the election date and the vote results. Keep a copy of any response.
2. Save your schedules and pay stubs and note which hours were paid at 1×, 1.5× and 2×.
3. Track holdovers beyond 12 hours and any mandatory overtime.
4. Log missed or interrupted breaks, including meal periods you were told to waive without signing a written waiver.
5. Request your payroll records and personnel file in writing (Labor Code 226 and 1198.5).
6. Get advice before signing any release. Compare your options in our guide to Labor Commissioner claims versus hiring a lawyer.

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Overtime problems are often the tip of the iceberg

Where long shifts are common, so are related violations: automatic meal deductions for breaks nurses never get, rounded time punches at shift change, off-the-clock charting, and regular rates that leave out differentials. Our wage and hour attorneys review the whole pay picture.

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Frequently asked questions

Can my employer make me work 12-hour shifts without overtime?

Only under a validly adopted AWS. Without one, hours 9 through 12 are overtime at 1.5×, and hours over 12 are double time.

Is double time required under an AWS?

Yes. Hours over 12 in a workday must be paid at double time even under a valid alternative workweek.

Can I be forced to work past my 12-hour shift?

In healthcare, an employee on a 12-hour AWS shift generally cannot be required to work beyond 12 hours in 24 unless a healthcare emergency is declared, and there are firm limits at 16 and 24 hours.

I voted against the AWS. Am I still bound by it?

Generally yes, if it was validly adopted by two-thirds of your work unit. But your employer must make a reasonable effort to find you a different schedule if you can’t work it.

Are travel nurses and per diem staff covered?

Generally yes. California overtime law covers non-exempt employees regardless of whether they are full-time, part-time, per diem or employed through a staffing agency.

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