California vs. Federal: When State Daily Overtime Changes Everything

The Federal Baseline

The FLSA requires overtime pay for non-exempt employees who work more than 40 hours in a workweek. That is the only federal trigger. A workday of 12 hours is, in itself, not a federal overtime event. An employee who works 4 days at 10 hours each (40 total) owes no overtime under the FLSA, regardless of how long any single day was.

Most payroll systems implement this correctly for the 47 states where it is the entire rule. The problem arises when employees work in one of four states that layer a daily overtime requirement on top: California, Nevada, Colorado, and Alaska.

California — The Most Complex Daily OT Regime in the US

California Labor Code §510 and the applicable IWC Wage Orders create a three-tier daily overtime structure:

The critical design challenge: daily OT and weekly OT must not be double-counted. An hour cannot generate two overtime premiums. A day with 10 hours generates 2 daily OT hours at 1.5×; if the employee also exceeds 40 for the week, those same 2 hours do not generate additional weekly OT.

Example: 6-day, 54-hour California workweek

Mon 10h (8 reg + 2 daily OT @1.5×)
Tue 10h (8 reg + 2 daily OT @1.5×)
Wed 10h (8 reg + 2 daily OT @1.5×)
Thu 10h (8 reg + 2 daily OT @1.5×)
Fri  8h (8 reg — no OT)
Sat  6h (6 reg — no daily OT, but weekly total = 54h)

Weekly hours over 40: 14h
Daily OT already counted: 8h (Mon–Thu)
Weekly OT increment: 14h − 8h = 6h (Sat hours, not already covered)
Additional weekly OT: 6h @1.5×

A system that naively applies both the daily and weekly rule independently would calculate 8 daily OT hours + 14 weekly OT hours = 22 OT hours. The correct answer is 14 OT hours total (8 daily, plus 6 additional weekly).

Alternative Workweek Schedule (4/10)

California allows employers to establish an Alternative Workweek Schedule (AWS) under IWC regulations. A common arrangement is four 10-hour days per week. Under a valid 4/10 AWS, the daily overtime threshold shifts from 8 hours to 10 hours — eliminating the daily OT premium for the standard 10-hour day. Hours 10–12 still generate 1.5×; hours over 12 still generate 2.0×.

Nevada — The Wage Threshold Rule

Nevada is the only state with a wage-conditional daily overtime rule. Under NRS 608.018:

• Employees earning less than 1.5× the state minimum wage ($18.00/h for 2026) receive daily OT after 8 hours.
• Employees earning at or above that threshold are only subject to the federal 40-hour weekly rule.
• All employees receive weekly OT after 40 hours regardless of wage level.

The threshold is evaluated against the employee's regular hourly rate at the time of the payrun. An employee who receives a raise above $18/h mid-year transitions out of daily OT eligibility for subsequent pay periods.

Nevada also permits a 4/10 Alternative Workweek Schedule for eligible employees, which shifts the daily threshold from 8 to 10 hours (but only for those below the $18/h threshold who would otherwise be subject to daily OT).

Example: Nevada employee at $16/h, 9 hours on Monday

Hourly rate: $16.00 < $18.00 threshold → daily OT applies
Monday: 8 regular + 1 OT hour @1.5× = ($16 × 8) + ($24 × 1) = $152
Compare: same employee at $20/h, no daily OT, 9h all regular = $180

Colorado — The Higher-Of Rule

Colorado's COMPS Order #39 (§4.1.1) provides that employers must pay overtime for hours that exceed:

• 12 hours in any workday, or
• 12 consecutive hours regardless of workday, or
• 40 hours in a workweek.

The Colorado rule uses a higher-of approach: the employer pays whichever calculation produces the greater amount. Unlike California, Colorado does not have a double-time tier — all daily and weekly OT is at 1.5×. And like California, daily OT hours already counted may not be double-counted against the weekly total.

The 12-consecutive-hour rule

This is the trap that catches most systems. An employee who works 6:00 PM to 6:30 AM has worked across two calendar days. If the employer defines their workday as midnight-to-midnight, the employee worked 6 hours on Day 1 and 6.5 hours on Day 2 — neither day exceeds 12 hours individually. But the consecutive span is 12.5 hours, triggering 0.5 hours of daily OT regardless of the workday definition.

Alaska — Simple but Overlooked

Alaska AS 23.10.060 requires 1.5× for all hours over 8 in a workday. There is no double-time tier, no wage threshold, and no special 7th-day rule. The rule is simple — but it is frequently missed by employers who set up Alaska employees in a system that only enforces the federal 40-hour rule.

Alaska is particularly relevant for oil & gas, construction, and remote-project employment where 10–12 hour days are the norm. A 5-day schedule at 10 hours per day (50 hours, 2 federal OT hours) also generates 10 additional daily OT hours under Alaskan law — a total of 12 OT hours rather than 2.

State-by-State Comparison

Anti-Pyramiding: The No-Double-Count Requirement

All four states require that daily overtime hours not be double-counted against the weekly overtime threshold. The rule is called the anti-pyramiding principle. An hour can trigger either daily OT or weekly OT — never both simultaneously.

The calculation order matters:

1. Identify daily OT hours per day (hours over daily threshold)
2. Sum all hours for the week
3. If weekly total > 40, calculate additional OT hours = (weekly total − 40) − daily OT hours already counted
4. Pay the higher result (CA/CO) or sum without overlap (NV/AK)

How US.Payroll Implements This

The following describes the technical implementation in Payroll Engine's US.Payroll regulation for readers evaluating the platform. This section assumes familiarity with the PE terminology introduced at the top of this article.

State daily OT runs through a dispatch path in WT 1020. The US.WorkState CaseField routes the overtime calculation to the correct state-specific function. Each function is self-contained, with anti-pyramiding logic inlined directly (PE's Roslyn scripting environment isolates each script file, preventing cross-file class references).

Test Case References