Fluctuating Workweek Calculator: Half-Time Overtime Rules

The fluctuating workweek is the one lawful way to pay a non-exempt salaried employee overtime at half their regular rate instead of one and a half times it. It works because the fixed salary is treated as already covering straight-time pay for every hour worked, however many there are, so only the overtime premium remains. The result is that the regular rate falls as hours rise: an employee paid $800 a week earns $20 an hour in a 40-hour week and $16 an hour in a 50-hour week, and the overtime for those 10 extra hours is $80, not $300. Employers like it for exactly that reason, and employees who understand it generally do not.

The Department of Labor allows the method under 29 CFR 778.114 on five conditions, and since a 2020 rule change allows bonuses and shift differentials on top of the salary. Four states refuse to allow it under their own wage laws, and one restricts it. The calculator below computes pay for a week under the fluctuating method and shows what the same week would cost under standard overtime and under the salary-divided-by-40 method; the rest of the page sets out the conditions, the state positions, the arithmetic traps and when the method makes sense. For the standard calculation, see the overtime calculator.

Fluctuating workweek calculator

How the method works

Under the Fair Labor Standards Act, overtime is one and a half times the "regular rate," and the regular rate for a salaried employee is the salary divided by the hours it is intended to compensate. The usual assumption is 40 hours: an $800 salary is $20 an hour, and an hour of overtime costs $30. The fluctuating workweek method rests on a different agreement. The salary is understood to pay straight time for all hours worked in the week, whether 30 or 55. The regular rate is therefore the salary divided by the hours actually worked, and because straight time for the overtime hours has already been paid by the salary, only the half-time premium is owed on them.

Two features of the table explain both the appeal and the controversy. The employee is paid the full $800 in a 36-hour week, which is the quid pro quo: the salary does not drop when hours do. And the premium per overtime hour falls as hours rise, from $9.09 at 44 hours to $6.67 at 60, so the marginal cost of working an employee longer declines. The Department of Labor's own example in the regulation uses a $600 salary: 48 hours gives a $12.50 regular rate, a $6.25 half-time rate and $650 total, against $780 under the standard method.

The five conditions

29 CFR 778.114(a), as rewritten in 2020, lists what must be true for the method to apply. Failing any one of them means the employer owes standard overtime on the salary-divided-by-40 rate for the whole period, usually two or three years back, plus liquidated damages.

1. The employee's hours actually fluctuate from week to week. They need not fluctuate above and below 40, and the regulation says so, but a schedule that is 45 hours every week is not fluctuating, and courts have rejected the method where hours were essentially fixed.
2. The employee receives a fixed salary that does not vary with the number of hours worked. Docking the salary for a short week, or for partial-day absences, breaks the condition; the employee must receive the full salary for any week in which any work is performed. Deductions for full-day absences under a bona fide sick or vacation plan are permitted once the leave is exhausted, but the Department has warned that occasional disciplinary deductions are not.
3. The salary is large enough that the regular rate never falls below the applicable minimum wage in the employee's longest weeks. At $7.25 an hour an $800 salary supports up to 110 hours, but at a $17 state minimum wage it supports 47. The calculator checks this.
4. The employer and employee have a clear and mutual understanding that the fixed salary is compensation for all hours worked each week, however many or few. The understanding need not extend to how overtime is calculated, and need not be in writing, but employers that cannot produce a signed acknowledgment usually lose this point. A standard offer letter describing an annual salary "for a 40-hour week" defeats it.
5. The employee receives overtime pay of at least one-half the regular rate for every hour over 40, with the regular rate computed each week by dividing the salary plus any non-excludable extra pay by that week's hours. An employer that pays only the salary, or that pays straight time for overtime hours, is not using the method and owes full time and a half.

Bonuses, differentials and the 2020 rule

Until 2020 the Department of Labor's position, stated in a 2011 preamble, was that paying bonuses or premiums on top of the fixed salary was incompatible with the method because the pay then varied with hours. Courts split. The final rule published June 8, 2020 and effective August 7, 2020 settled it: bonuses, premium payments, commissions, hazard pay and shift differentials are compatible with the fluctuating workweek, and must be included in the regular rate unless they fall within an exclusion in Section 7(e) of the Act (discretionary bonuses, gifts, expense reimbursements and the like). The regulation's examples: a $600 salary plus a $5-an-hour night differential for 8 of 48 hours gives a regular rate of ($600 + $40) ÷ 48 = $13.33 and total pay of $693.33; a $600 salary plus a $100 productivity bonus for 45 hours gives ($700 ÷ 45) = $15.56, a $7.78 half-time rate, $38.90 in premium and $738.90 total. Hours-based bonuses (an extra $25 for any week over 50 hours, say) remain the most litigated, because they look like a device to pay for hours while calling the pay a bonus.

States that prohibit or restrict the method

State wage laws can be more protective than the federal Act, and several states' overtime statutes have been read not to allow half-time pay.

State daily-overtime rules (Alaska, California, Colorado, Nevada) are independently incompatible with a weekly half-time calculation, and state minimum wages well above $7.25 shrink the salary range in which the method works. Our overtime laws by state guide covers both.

Where employers get it wrong

• Treating it as a classification. The fluctuating workweek is a pay method for non-exempt employees, not an exemption. Employees paid this way still need hours recorded every week, because the regular rate changes every week. An employer that does not track hours cannot use the method.
• Docking the salary. A deduction for a late arrival, a short week or a half-day absence breaks condition two and converts every week in the limitations period to standard overtime.
• The offer letter. "$41,600 a year based on a 40-hour week" is the single most common document that defeats the clear mutual understanding. The agreement must say the salary covers all hours worked, and should say the overtime method.
• Forgetting the bonus in the regular rate. Since 2020 the bonus is allowed but must be added to the salary before dividing by hours. Paying the half-time premium on the salary alone underpays every week with a bonus.
• Using it where hours do not fluctuate. A standing 48-hour schedule paid by salary plus half-time is not a fluctuating workweek; it is a fixed workweek with underpaid overtime, and the regular rate is the salary ÷ 48 with full 1.5x owed (29 CFR 778.113 and 778.325).
• Multistate payrolls. A single salaried non-exempt job family paid under the method in Texas and Pennsylvania is compliant in one and unlawful in the other. The state of the employee's work governs.
• Reduced-hours weeks with partial pay. Furlough weeks where the employer pays a prorated salary for reduced hours break the fixed-salary condition for that week and, if frequent, undermine the mutual understanding altogether; the Department addressed this during 2020 and allowed temporary reductions only where the salary stayed fixed within each week.

When it makes sense, and when it does not

The method suits jobs where hours genuinely swing in both directions and the employee values the steady check: retail and restaurant assistant managers who no longer meet the exempt salary threshold, field service coordinators, dispatchers, some health care support roles. It is cheapest for the employer when hours are usually above 40, which is also when employees most resent it, since their effective hourly rate falls the harder they work. It saves nothing when hours rarely exceed 40, and it costs more than hourly pay when hours are often short, because the full salary is owed for a 30-hour week.

Many employers that adopted the method after the 2016 and 2019 changes to the exemption threshold have since moved the affected employees to hourly pay with a guaranteed minimum, which is simpler to explain, lawful in every state and far less often litigated. The method's defenders note that it is the only arrangement under which a non-exempt employee is guaranteed full pay in a short week, which is worth something to the employee; whether it is worth the lower overtime rate is a question the employee should be allowed to answer with full information, which is what condition four is for.

If you are paid this way

Check three things against your pay stubs. First, that your salary is the same in every week you worked at all, including short weeks; a docked salary means the method does not apply and you are owed full time and a half. Second, that you received an overtime line in every week over 40 hours equal to at least half of (salary plus bonuses) divided by that week's hours, times the overtime hours; the calculator above does the arithmetic. Third, that you work in a state that allows the method; if you work in California, Alaska, New Mexico or Pennsylvania, or in retail in Connecticut, you are owed the difference between what you were paid and standard overtime, for up to three years. Wage claims through the state labor department or the federal Wage and Hour Division are free, and your own record of hours is evidence if the employer's is incomplete.

Key takeaways

• Under 29 CFR 778.114 a non-exempt employee on a fixed salary for fluctuating hours is owed overtime at one-half the regular rate, where the regular rate is salary plus non-excludable extra pay divided by all hours worked that week.
• An $800 salary for 50 hours gives a $16 regular rate and $80 of overtime, against $300 under the standard salary-divided-by-40 method; the premium per overtime hour falls as hours rise.
• Five conditions: hours actually fluctuate, the salary is fixed and never docked, the regular rate stays above minimum wage in the longest week, there is a clear mutual understanding that the salary covers all hours, and at least half-time is paid on every hour over 40.
• The June 2020 final rule (effective August 7, 2020) allows bonuses, commissions, hazard pay and shift differentials on top of the salary; they must be added to the salary before computing the regular rate.
• Alaska, California, New Mexico and Pennsylvania do not permit the method under state law; Connecticut bars it for retail employees. Daily-overtime states are independently incompatible.
• Failing any condition, including a 40-hour offer letter, a docked salary or a fixed schedule, converts every week in the limitations period to standard time and a half plus liquidated damages.
• Employees paid this way still need weekly hours records, since the regular rate changes every week; the method is a pay formula for non-exempt staff, not an exemption.