A $1,000 Salary at 60 Hours Pays $1,166.67, Not $1,750
That $583.33 gap is the fluctuating workweek method in action. A salaried non-exempt worker whose hours swing from week to week gets overtime at half the usual rate because the fixed salary is treated as straight-time pay for every hour worked. The more hours, the lower the effective hourly rate, and the smaller the overtime add-on. Employers call it the half-time method. Payroll departments call it Chinese overtime. The math is the same either way.
The Half-Time Multiplier Replaces Time and a Half
Conventional overtime multiplies the base rate by 1.5. The fluctuating workweek method multiplies it by 0.5. That is the entire difference.
Say the weekly salary is $1,000. Under the standard formula, a 50-hour week at a fixed $25 hourly rate yields $1,375.00. Under the fluctuating method, the same week yields $1,100.00. The salary absorbs the straight-time portion of every overtime hour. The employer only adds half the computed hourly rate for hours beyond 40. As the workweek stretches, the hourly rate shrinks, and the half-time add-on shrinks with it.
Four Conditions the DOL Requires
Employers cannot adopt this method casually. The U.S. Department of Labor and federal courts demand four things.
A Salaried Non-Exempt Worker
The worker must receive a fixed weekly paycheck that does not rise or fall with hours worked. Hourly employees do not qualify.
A Salary That Clears Minimum Wage Every Week
That salary must clear the applicable minimum wage in every week, even the longest ones. For 2024, the federal floor is $7.25 an hour. Some states set higher floors. The salary must clear the highest applicable minimum.
Hours That Actually Fluctuate
A pattern of busy weeks and slow weeks is essential. A worker who consistently logs 50 hours with no variation does not qualify.
A Clear Mutual Understanding
Employer and worker must share a documented understanding that the salary covers straight time for all hours. A signed, plain-language agreement is the strongest evidence. A payroll history that consistently applies the half-time calculation helps. Without this understanding, a court may decide the salary was meant for a fixed schedule, and the employer will owe back wages at the full 1.5x rate.
The Calculation, Step by Step
Two steps. No shortcuts.
Step 1: Find the Effective Hourly Rate
Divide the weekly salary by total hours worked. A $1,000 salary across 45 hours gives $22.22. Across 60 hours, it gives $16.67.
Step 2: Compute the Half-Time Premium
Multiply that rate by 0.5, then multiply by the overtime hours. At 45 hours: $22.22 × 0.5 × 5 = $55.56. At 60 hours: $16.67 × 0.5 × 20 = $166.67.
Add the premium to the salary. Done.
Four Weeks, One Salary, a Widening Gap
Take a salaried non-exempt worker earning $1,000 weekly.
A 40-Hour Week
Rate: $25.00. Overtime premium: $0.00. Total: $1,000.00.
A 45-Hour Week
Rate: $22.22. Overtime premium: $55.56. Total: $1,055.56.
A 50-Hour Week
Rate: $20.00. Overtime premium: $100.00. Total: $1,100.00.
A 60-Hour Week
Rate: $16.67. Overtime premium: $166.67. Total: $1,166.67.
Now compare those totals with conventional overtime at a fixed $25 hourly rate, using figures from the federal time-and-a-half formula.
| Hours | Fluctuating Method | Conventional Overtime | Difference |
|---|---|---|---|
| 40 | $1,000.00 | $1,000.00 | $0.00 |
| 45 | $1,055.56 | $1,187.50 | $131.94 less |
| 50 | $1,100.00 | $1,375.00 | $275.00 less |
| 60 | $1,166.67 | $1,750.00 | $583.33 less |
The conventional overtime totals come from the FLSA formula: 40 hours at the base rate plus overtime hours at 1.5x. At $25 an hour, 45 hours means 40 hours at $25 ($1,000.00) plus 5 hours at $37.50 ($187.50), totalling $1,187.50. At 50 hours: $1,000.00 plus 10 hours at $37.50 ($375.00) equals $1,375.00. At 60 hours: $1,000.00 plus 20 hours at $37.50 ($750.00) equals $1,750.00.
The fluctuating method pays less every time hours exceed 40. The gap is not a fixed percentage. It grows with every additional hour.
Conventional Overtime vs. the Fluctuating Method
| Feature | Conventional Overtime | Fluctuating Workweek |
|---|---|---|
| Overtime multiplier | 1.5x the computed rate | 0.5x the computed rate |
| Computed rate | Fixed or stable | Falls as hours rise |
| Straight time for OT hours | Paid inside the 1.5x total | Already inside the salary |
| Employer cost | Higher | Lower |
| Legal exposure | Low | High, and rules shift |
Conventional overtime is the default under the Fair Labor Standards Act. The fluctuating workweek method is a narrow exception. Most workers will never see it. Most businesses should not touch it without a wage-and-hour attorney.
The Legal Ground Keeps Shifting
The U.S. Supreme Court upheld the method in 1942 in Walling v. Youngerman-Reynolds Hardwood Co. Since then, lower federal courts have split. The DOL has changed its regulatory stance more than once.
The Federal Rule Today
A 2020 DOL rule explicitly endorsed the method, and that rule stands. But some federal appeals courts have rejected the method in specific cases, usually where hours did not truly fluctuate or the mutual understanding was absent.
The 2024 Salary Threshold Change
The DOL issued a rule raising the salary threshold for exempt staff to $43,888 annually ($844 weekly) effective July 2024, with a further increase to $58,656 ($1,128 weekly) scheduled for January 2025. A federal court stayed the rule. Check the current threshold with the DOL Wage and Hour Division before relying on any figure.
State Law Adds Another Layer
California restricts the method: the salary must cover all hours at no less than the state minimum wage, and the half-time premium must be paid on top. Other states have not addressed the method at all. Contact your state labor department for the rules that apply where the work is performed.
Employer Arithmetic: Lower Cost, Higher Risk
A predictable salary bill is attractive. An overtime premium that shrinks as hours climb is cheaper than 1.5x. But the risks are real.
A single misstep voids the method. If a court finds the mutual understanding was missing, the employer owes the full 1.5x rate retroactively, plus liquidated damages and the worker's legal fees. The lookback period can reach three years for willful violations. Payroll systems must apply the half-time calculation consistently. A written agreement signed by the worker is not optional. It is the minimum.
Worker Arithmetic: Stable Pay, Shrinking Return
A fixed salary means a slow week does not cut the paycheck. That is the upside. The downside is that every extra hour beyond 40 returns less than it would under conventional overtime. At 60 hours, the effective hourly rate for those final 20 hours is $8.33, half the $16.67 computed rate. A worker cannot predict the total pay from week to week because the premium depends on hours logged. If the employer miscalculates, the worker is underpaid and may not notice.
What to Do Now
For Employers
Get a written opinion from a wage-and-hour lawyer before adopting this method. Do not rely on a payroll provider's default settings. Do not assume a handshake counts as a clear mutual understanding.
For Salaried Non-Exempt Workers
Examine your pay stub. If overtime hours are paid at anything less than 1.5x your effective rate and you never signed a fluctuating workweek agreement, contact the DOL Wage and Hour Division or your state labor agency. Federal law allows claims going back two years, or three years for willful violations.
For the conventional overtime formula, see the how to calculate overtime pay guide. For when a salary does not block overtime rights, read overtime pay for salaried employees. For workers paid at multiple rates, the weighted average overtime calculation applies.
The half-time method is legal. Legal is not the same as fair, and it is not the same as simple. Know the math. Check your state's rules. Never assume the employer got it right.