Last updated: October 2026

How Overtime Is Calculated Under Federal and State Rules

Overtime calculation starts with the regular rate, not the hourly rate.

The Regular Rate Is Not Your Hourly Rate

Federal law under the Fair Labor Standards Act (FLSA) defines the regular rate of pay as total compensation for the workweek divided by total hours worked. Straight hourly wages are only part of that number. Nondiscretionary bonuses, shift differentials, commissions, piece-rate earnings, and on-call pay all fold into the regular rate before the overtime premium kicks in. This rule does not apply to true discretionary bonuses, such as a holiday gift the employer has no obligation to pay. If a bonus is promised in advance or tied to productivity or attendance, the FLSA treats it as nondiscretionary.

An employee earning $20 per hour with a $100 weekly shift differential does not have a regular rate of $20. If that employee worked 50 hours, the regular rate is ($20 x 50 + $100) / 50, which equals $22 per hour. The overtime premium applies at $22, not $20.

Your hourly rate is a starting point, not a finish line.

How Is Overtime Calculated for Time and a Half

The standard federal formula is straightforward once you know the correct regular rate. Multiply the regular rate by 1.5 for every hour worked beyond 40 in a single workweek. No averaging across pay periods is allowed under FLSA rules.

Take a warehouse worker earning $18 per hour who logs 48 hours in one week with no other compensation. The regular rate equals $18. Overtime pay for those 8 extra hours is $18 x 1.5 x 8, totaling $216.

Gross pay for the week: ($18 x 40) + $216 = $936. That part is simple.

Now give that same worker a $200 production bonus covering the same workweek. The regular rate jumps to ($18 x 48 + $200) / 48 = $22.17 per hour. The bonus adds $4.17 to the regular rate, so the employer owes another half of that $4.17 on each of the 8 overtime hours, or $16.67 for the week. An employer who paid the bonus without recalculating has paid $1,136.00 against a correct $1,152.67. The time and a half multiplier was right. The number being multiplied was not.

Nondiscretionary Bonuses Blow Up Overtime Math

A nondiscretionary bonus paid monthly or quarterly must be retroactively allocated across every workweek in the bonus period. The employer then owes an additional 0.5x overtime premium on every overtime hour worked during that entire span.

Picture a $500 quarterly bonus for an employee who worked 520 straight-time hours and 40 overtime hours over the quarter. First, find the per-hour bonus value: $500 / 560 total hours = $0.893 per hour. Next, multiply by 0.5 for the overtime premium: $0.893 x 0.5 = $0.446. Finally, multiply the unrounded figure by 40 overtime hours: $17.86 in additional overtime pay owed for the quarter.

Skip that $17.86 and multiply it across 200 employees over four quarters. The annual exposure reaches $14,288 before liquidated damages, which double the total under FLSA.

Bonuses are generous until they trigger a wage claim.

Weighted Averages When Employees Work Two or More Rates

Employees who perform different jobs at different pay rates within the same workweek need a weighted average to determine the regular rate. A restaurant worker earns $15 per hour as a host and $18 per hour as a server. If that worker logs 25 host hours and 20 server hours (45 total), the week's earnings are ($15 times 25) plus ($18 times 20), or $735. Divided by 45 hours, the weighted regular rate is $16.33.

Because all 45 hours were already paid at their job rates, the employer owes an additional half of the regular rate on the 5 overtime hours, or $40.83. The worker is due $775.83 for the week against the $735 already paid. Federal rules require the weighted average unless the employer and employee agree in advance to use the rate of the job being performed during overtime hours.

The tradeoff with weighted averaging: it demands accurate time tracking by job code, not just total hours.

California Daily Overtime Changes Everything

California overtime rules operate on a daily threshold, not just a weekly one. Any nonexempt employee working more than 8 hours in a single day earns 1.5x for hours 9 through 12 and double time for every hour beyond 12. An employee working four 10-hour days (40 hours total) earns 8 hours of overtime pay in California, while the same schedule under federal FLSA rules triggers zero overtime.

Seven consecutive workdays in the same workweek also trigger daily overtime in California, starting with 1.5x for the first 8 hours on day seven and double time after that.

Double time is not just a union perk in California.

Other states with daily overtime provisions include Alaska (over 8 hours) and Nevada (over 8 hours at less than 1.5x minimum wage). Colorado requires time and a half past 12 hours in a day. Federal FLSA acts as the floor, not the ceiling.

Fluctuating Workweek and Public Sector Comp Time

The fluctuating workweek method applies to salaried nonexempt employees whose hours genuinely vary week to week. Under this approach, the salary covers all hours worked at straight time. The employer pays only an additional 0.5x premium for overtime hours, not 1.5x, because the base rate already compensates those hours at 1.0x. A salaried nonexempt employee earning $900 per week who works 50 hours has a regular rate of $18 per hour. The overtime premium is $18 x 0.5 x 10 = $90, making total pay $990.

Had the same $900 salary been intended to cover 40 hours instead, the regular rate would be $22.50. The 10 overtime hours would then earn time and a half, bringing total pay to $1,237.50. That savings comes with strict conditions. The salary must remain fixed regardless of hours, the employee must understand the arrangement, and the hours must actually fluctuate.

Public sector employers have a separate option: compensatory time off in lieu of overtime pay. Under Section 207(o) of the FLSA, state and local government agencies can offer 1.5 hours of comp time for every overtime hour worked, up to 240 hours. Public safety, emergency response and seasonal work can accrue up to 480 hours. Private employers cannot legally offer comp time instead of overtime pay under current federal law, regardless of what the employee prefers. The One Big Beautiful Bill Act did not change this. It created a tax deduction, not an hours rule, and comp time accrued under section 207(o) counts toward that deduction only when it is paid out as wages.

Overtime Mistakes That Lead to Back Pay Claims

Averaging hours across a two-week pay period instead of calculating each workweek separately violates FLSA even when the employee consents. A worker logging 50 hours in week one and 30 in week two still earns 10 hours of overtime in week one.

Most exemptions require meeting both a salary test ($684 per week in 2026) and a duties test, and salaried nonexempt overtime covers what is owed when they are not met. Paying someone a salary does not make them exempt. Job title does not determine status; actual daily duties do.

Rounding time punches in the employer's favor violates FLSA's requirement for neutral rounding. Failing to count pre-shift and post-shift work, such as putting on safety gear or attending mandatory briefings, also generates unpaid overtime when those minutes push a worker past 40 hours.

Verify Your Overtime Process Before the Next Pay Run

Pull last quarter's payroll reports and check whether any nondiscretionary bonuses were included in regular rate calculations. If bonuses posted as flat additions with no overtime adjustment, you owe retroactive premiums to every affected worker.

Recalculate overtime for your three highest-overtime employees following the overtime calculator guide, using their actual total compensation, not just base rates. Compare your payroll system's output to your result.

Audit your exempt classifications next. Review the actual duties of every salaried employee classified as exempt.

Reclassifying proactively costs overtime pay going forward. Reclassifying after a Department of Labor finding costs back pay for up to three years, plus an equal amount in liquidated damages. Reach the overtime compliance hub for additional calculation tools.

This is not legal or financial advice. Consult a qualified professional for your specific situation.