California Daily Overtime & Double-Time Rules: Labor Code § 510 Guide

1. The California Statutory Overtime Framework

Under California law, overtime is calculated on both a daily and a weekly basis. California Labor Code § 510(a) codifies this standard:

"Eight hours of labor constitutes a day's work. 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 shall be compensated at the rate of no less than one and one-half times the regular rate of pay for an employee. 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. In addition, any work in excess of eight hours on any seventh day of a workweek shall be compensated at the rate of no less than twice the regular rate of pay of an employee." — Cal. Lab. Code § 510(a)

This creates four distinct statutory premium tiers that protect non-exempt hourly employees throughout the State of California.

2. The Four Statutory Premium Tiers

3. Defining the "Workday" and "Workweek"

Accurate overtime calculations depend entirely on the employer's formal definitions of "workday" and "workweek" under Labor Code § 500:

• Workday: Any consecutive 24-hour period beginning at the same time on each calendar day. If an employer does not formally establish a workday start time, the default under California law is 12:01 a.m. to midnight.
• Workweek: Any seven consecutive 24-hour periods (168 consecutive hours) starting on the same calendar day and hour each week. The default workweek runs Sunday at 12:01 a.m. through Saturday midnight.
• Anti-Manipulation Rule: Once established, an employer cannot alter the workday or workweek start times to intentionally evade overtime obligations.

4. Calculating the Statutory Regular Rate of Pay (RRP)

A common employer violation in California is calculating overtime based solely on an employee's base hourly wage instead of the true Regular Rate of Pay. Under DLSE Enforcement Manual § 49 and California case law, the regular rate must include:

• Hourly base pay
• Shift differentials and hazard pay
• Commissions and piece-rate earnings
• Nondiscretionary bonuses (e.g., attendance, production, or safety bonuses)

5. Alternative Workweek Schedules (AWS) Under Labor Code § 511

An employer may establish an Alternative Workweek Schedule (such as four 10-hour days per week) without incurring daily overtime after 8 hours only if the strict procedural requirements of California Labor Code § 511 are met:

1. The proposed schedule must be presented to an identifiable employee work unit.
2. A secret ballot election must be held, requiring approval by at least a two-thirds (66.7%) majority of affected employees.
3. The election results must be formally registered with the Department of Industrial Relations (DIR) within 30 days.
4. Under a 4/10 schedule, work between 8 and 10 hours on scheduled days is exempt from daily overtime; however, work beyond 10 hours in a day still requires 1.5x overtime, and work beyond 12 hours still requires 2.0x double-time.

6. California Overtime Worked Examples

7. Non-Exempt Salary Exemption Thresholds

Employers cannot avoid California daily overtime by classifying an employee as "salaried" unless the employee satisfies both the duties test (executive, administrative, or professional) and the statutory salary basis test under California Labor Code § 515(a).

The California salary threshold is strictly defined as no less than two times the state minimum wage for full-time employment (40 hours × 52 weeks = 2,080 hours):

Note: Paying an employee above this salary threshold does not make them exempt if their primary job duties do not meet California's strict managerial, administrative, or professional criteria.