Fluctuating Workweek Overtime Calculator
Enter a fixed weekly salary and hours worked to get the fluctuating workweek regular rate, the half-time overtime premium, and total gross pay for the week.
Fluctuating Workweek Overtime Calculator
The fixed salary
The salary that does not change with hours worked.
Anything other than weekly is converted to a weekly figure under 29 CFR 778.113(b): biweekly divides by 2, semimonthly multiplies by 24 and divides by 52, monthly multiplies by 12 and divides by 52.
Hours and extra pay
Total hours in the FLSA workweek, including the overtime hours. The presets are the four weeks the regulation works through, plus two longer ones.
Non-discretionary pay that must go into the regular rate: productivity bonus, commission, hazard pay, shift differential. Leave at 0 for pay excludable under FLSA 7(e)(1) to (8), such as gifts and genuinely discretionary bonuses.
Enter the hours actually worked: the regular rate is the salary divided by those hours.
No overtime is owed, and under 778.114(a)(2) the fixed salary cannot be cut for a short week.
There are only 168 hours in a week.
The fluctuating workweek method pays $130.00 less for this week.
The regular rate is the salary plus non-excludable extra pay divided by every hour worked, rounded to cents, and the premium is half of that rounded rate for each hour past 40. That is the order 29 CFR 778.114(b) uses in its own examples.
How the rate slides as hours rise
| Hours | Regular rate | Overtime hours | Half-time premium | Gross pay |
|---|
Same salary, same extra pay, six different weeks. The rate falls every time the hours go up, which is the whole mechanism of the method and the reason it costs an employer less than time and a half.
Paystub earnings lines
Enter hours to generate the stub lines.
Keep the salary and the overtime premium on separate earnings lines. The premium line is the figure that maps to qualified overtime compensation at year end, and an investigator can re-derive it from hours times rate without asking you for a spreadsheet.
How the fluctuating workweek regular rate is calculated
The assumption underneath the method is that the salary has already paid straight time for every hour worked, including the overtime hours. So only the half-time premium is still owed, and the regular rate lands somewhere different every week.
Three lines of arithmetic, in the order 29 CFR 778.114 uses them:
- Straight-time earnings = fixed weekly salary plus any non-excludable additional pay for the week
- Regular rate = straight-time earnings divided by every hour actually worked, rounded to cents
- Overtime premium = 0.5 times that rounded rate, times the hours past 40
Because the numerator is fixed and the denominator is not, the rate slides down as the week gets longer. A $600 salary is $15.00 an hour over 40 hours, $12.00 over 50 hours, and $10.00 over 60 hours. The premium is half of whichever of those figures the week produced, so a longer week raises the premium far more slowly than it raises the hours.
The regulation states the reason plainly at 778.114(a)(5): "Payment for overtime hours at not less than one-half such rate satisfies the overtime pay requirement because such hours have already been compensated at the straight time rate by payment of the fixed salary and non-excludable additional pay."
Additional pay works the other way. A bonus, commission, hazard payment, or shift differential is added to the numerator, so it lifts the regular rate and lifts the premium with it. That is a different situation from an employee who works at two or more separate hourly rates in the same week, where 29 CFR 778.115 calls for a weighted average of those rates rather than a salary divided by hours. If the extra pay is a night or weekend premium, the shift differential pay calculator works that side of it in detail.
A worked example straight from 29 CFR 778.114
The regulation follows one employee on a $600 weekly salary through four weeks. Key each week into the calculator above and you should land on these figures:
- 37.5 hours: $16.00 an hour, no overtime hours, $600.00 gross
- 44 hours: $13.64 an hour, 4 overtime hours, $27.28 premium, $627.28 gross
- 50 hours: $12.00 an hour, 10 overtime hours, $60.00 premium, $660.00 gross
- 48 hours: $12.50 an hour, 8 overtime hours, $50.00 premium, $650.00 gross
The 44-hour week is worth pausing on. $600 divided by 44 is $13.6363 and so on forever. The regulation rounds that to $13.64 and then takes half of the rounded figure, which is why the premium is $27.28 rather than $27.27. This calculator rounds in the same order.
The 2020 final rule added two more variants at 48 hours. Pay a $20 nightshift premium and straight-time earnings become $620, the rate rises to $12.92, and the week totals $671.68. Pay a $100 productivity bonus instead and earnings are $700, the rate is $14.58, and the week totals $758.32. Commission works the same way, which the commission pay calculator covers on its own terms.
Now set that 48-hour week against the standard salaried method, where the salary is understood to cover 40 hours. The derived rate is $600 divided by 40, or $15.00. Overtime runs at 1.5 times that, and the week totals $780.00. The fluctuating workweek method pays $650.00 for the identical 48 hours. That $130.00 gap is why employers use the method, and why it draws litigation.
The five conditions, and where the method is banned outright
29 CFR 778.114(a) sets five conditions. All five have to hold at once, so run them as a checklist:
- The employee's hours fluctuate from week to week.
- The employee receives a fixed salary that does not vary with the hours worked, "whether few or many."
- That salary is enough to pay at least the applicable minimum wage for every hour worked in the employee's longest weeks. The calculator flags this against the $7.25 federal floor.
- The employer and employee have a clear and mutual understanding that the fixed salary covers all hours worked, apart from overtime premiums and non-excludable additional pay. This is the condition that most often fails in court, because it is the one nobody writes down.
- The employee actually receives at least half the regular rate for every overtime hour, on top of the salary and any extra pay.
Two related rules sit just below the list. 778.114(c) permits paying more than half-time, but the arrangement collapses if overtime hours are paid at no greater rate than non-overtime hours. 778.114(d) permits only occasional disciplinary deductions from the salary, and only where they do not cut into required minimum wage or overtime pay.
Federal permission is not the end of it. Four states prohibit the method: Alaska (8 AAC 15.100(d)(3)), California (Labor Code 515(d), which fixes the rate at 1/40th of the weekly salary), New Mexico (EchoStar Communications, 2006-NMCA-047), and Pennsylvania (Chevalier v. General Nutrition Centers, 2019). Connecticut allows it generally but bars it for mercantile employees under a state wage order (Williams v. General Nutrition Centers, 2017). Other states are reported to limit it, so check your state labor department before relying on it. The comparison row in the calculator is a method contrast, not a state requirement: where the method is banned, the replacement mechanics are set by that state's own law.
If you are on the receiving end of one of these paychecks and the overtime line looks too small, the paycheck error checker walks the wider set of things that go wrong on a stub.
Putting the half-time premium on a pay stub
Two earnings lines, not one. The salary goes on its own line at its stated amount, and the overtime premium goes on a separate line showing the overtime hours at the half-time rate. For the regulation's 48-hour week that reads: Salary $600.00, then Overtime premium 8.00 hrs at $6.2500 for $50.00, then Gross pay $650.00. Any extra pay for the week gets its own line above the premium, because it changed the rate the premium was built from.
The half-time rate carries four decimals for a reason. When the regular rate is an odd number of cents, half of it lands on a half cent, and rounding the rate to two decimals breaks the hours-times-rate arithmetic on the stub line. Showing $6.2500 keeps the line self-checking.
The premium rate changes every week under this method, so there is no standing rate table to point at. The stub is the record, and it is also where the year-end qualified overtime compensation figure comes from. The hourly to paystub earnings calculator turns the same figures into stub-ready rows if you are assembling several at once.
Payslip44 builds the document itself. The salary gets its own line, the overtime premium gets its own line with the hours and rate attached, and year-to-date columns run per line item across six layouts. The money math is decimal-precise, so it does not drift by a cent over a year of stubs. Everything runs on-device, and finished stubs export to PDF, PNG, CSV, or plain text. Download the app and put this week's numbers on a real stub.
Frequently Asked Questions
Common questions about fluctuating workweek overtime calculator
What is the fluctuating workweek method?
It is an FLSA overtime method for salaried non-exempt employees whose hours change from week to week. The fixed salary counts as straight-time pay for every hour worked that week. That makes the regular rate the salary, plus any non-excludable extra pay, divided by the hours actually worked. For hours past 40 the employee is owed an extra half of that rate, not time and a half. Because the salary is fixed, the regular rate falls as hours rise. It is set out at 29 CFR 778.114 and is sometimes called half-time overtime or "Chinese overtime."
When is an employer allowed to use the fluctuating workweek method?
29 CFR 778.114(a) lists five conditions, all of which must hold: (1) the employee's hours fluctuate from week to week; (2) the employee receives a fixed salary that does not vary with hours worked, "whether few or many"; (3) that salary is enough to pay at least the applicable minimum wage for every hour worked in the employee's longest weeks; (4) the employer and employee have a clear and mutual understanding that the fixed salary is compensation for all hours worked, apart from overtime premiums and any bonuses or other non-excludable additional pay (DOL notes the understanding need not extend to the specific calculation method, but a written agreement is the standard practice); and (5) the employee actually receives at least one-half the regular rate for every overtime hour, on top of the salary and any additional pay. Miss one and the method is unavailable: the employer then owes overtime the standard way, and the exposure is the difference.
Which states do not allow the fluctuating workweek method?
Four states have squarely rejected it. Alaska: 8 AAC 15.100(d)(3) lists "flex-time or flexitime plans established under 29 C.F.R. 778.114 providing a fixed salary for fluctuating hours" as not an acceptable way to comply with Alaska's overtime law. California: Labor Code 515(d) fixes the regular hourly rate of a non-exempt salaried employee at 1/40th of the weekly salary, so the rate cannot shrink as hours grow, and DLSE guidance divides the weekly salary by no more than 40 hours. Pennsylvania: the Pennsylvania Supreme Court held in Chevalier v. General Nutrition Centers, Inc. (No. 22 WAP 2018, Nov. 20, 2019) that the Pennsylvania Minimum Wage Act does not permit the method for salaried employees with fluctuating hours. New Mexico: N.M. Department of Labor v. EchoStar Communications Corp., 2006-NMCA-047, held that a fixed salary plus a half-time factor conflicts with the state requirement to pay time and a half. Connecticut is partial: in Williams v. General Nutrition Centers, Inc., SC 19829 (Aug. 17, 2017), the Connecticut Supreme Court upheld the method generally but held a state Department of Labor wage order bars it for mercantile (retail) employees. A handful of other states are reported to limit the method as well, so check your state labor department before relying on it anywhere outside the four clear prohibitions above.
Why is the overtime premium only 0.5x instead of 1.5x?
Because the straight-time half has already been paid. Under 778.114(a)(5), the fixed salary compensated every hour worked, including hour 41 and beyond, at the straight-time rate, so only the 50 percent premium portion is still outstanding. Under the ordinary salaried method the salary is understood to cover 40 hours, so the overtime hours have had no straight-time payment yet and the full 1.5x is due. Same statute, different starting assumption about what the salary bought. The comparison row on this page shows the dollar gap for the week you entered.
Do the employee's hours have to drop below 40 some weeks?
No. The regulation requires only that hours "fluctuate from week to week." DOL confirmed in the preamble to the June 8, 2020 final rule and again in opinion letter FLSA2020-14 (Aug. 31, 2020) that hours do not need to fall below 40 for the method to apply, as long as they genuinely vary. A truly fixed schedule is a different matter: no fluctuation, so the method does not fit.
Do bonuses and commissions get added to the regular rate?
Yes. The 2020 final rule settled this. 778.114(a)(5) now states that bonuses, premium payments, commissions, hazard pay, and additional pay of any kind are compatible with the fluctuating workweek method and "must be included in the calculation of the regular rate unless excludable under section 7(e)(1) through (8) of the Act." The regulation's own example: a $600 salary plus a $100 productivity bonus over 48 hours gives a regular rate of $14.58 and an overtime payment of $58.32. Put that kind of pay in the additional-pay field; the commission pay calculator covers commission on its own terms. Genuinely discretionary bonuses, gifts, and the other 7(e) exclusions stay out.
What if the salary doesn't cover minimum wage for all the hours worked?
Then the method is off the table for that arrangement. 778.114(a)(3) requires the fixed salary to provide at least the applicable minimum wage for every hour worked in the weeks where hours are greatest. The federal floor is $7.25 an hour (DOL Wage and Hour Division), and many states set a higher one that governs where it applies. This calculator flags the salary any time salary divided by hours drops below $7.25. It tests the salary on its own: extra pay in a good week does not repair a salary that is too small for a long week. Separately, 778.114(d) allows only occasional disciplinary deductions from the salary, and only where they do not cut into required minimum wage or overtime pay.
Does the "no tax on overtime" deduction apply to the half-time premium?
The OBBB deduction (IRC 225) covers qualified overtime compensation, meaning the FLSA-required pay in excess of the regular rate. Under the fluctuating workweek method that excess is precisely the half-time premium; the fixed salary itself is straight-time pay and does not qualify. The deduction is capped at $12,500 for single and head-of-household filers and $25,000 for married filing jointly, phasing out above $150,000 and $300,000 of MAGI at $100 per full $1,000 over the threshold, for tax years 2025 through 2028. The deduction is claimed on the return, not applied by this calculator, and it does not change the gross figures shown above.