Fixed salary, changing weekly rate
Fluctuating Workweek Calculator
Model a fixed weekly salary across variable hours, add user-classified additional pay, and review half-time overtime alongside a conditions checklist that produces warnings rather than an eligibility verdict.
Why the regular rate changes each week
Under the modeled fluctuating-workweek method, a fixed weekly salary covers straight-time compensation for all hours in the week. Dividing the same salary by a different number of actual hours produces a different regular rate. The fluctuating workweek calculator performs that week-specific division instead of converting the salary with a permanent 40-hour divisor.
A salary does not by itself mean a worker is exempt. This tool is expressly a nonexempt pay-method scenario and still does not decide whether the method is available under federal or state law.
Fixed salary, additions, and the checklist
Enter non-excludable bonus, commission, hazard, or other additional pay as Included only when that is the scenario you want to model. Excluded amounts remain visible, and Unsure amounts do not silently affect the primary result. The same weekly numerator is used for the regular rate and additional premium calculation.
The checklist covers fluctuating hours, a salary intended for all straight-time hours, a salary that remains fixed subject to applicable rules, a clear mutual understanding, a minimum-wage review, and premium paid in addition. It is a risk checklist rather than an automated legal test.
Fluctuating-workweek half-time formula
At the default 1.5 multiplier, the remaining premium factor is 0.5 because the salary is modeled as straight-time compensation for all hours. The comparison line showing regular rate times 1.5 times overtime hours is informational and is never added to the fluctuating-workweek total.
Hours of zero cannot produce a rate. A user-entered minimum-wage reference only creates a sanity warning; it does not select the controlling wage or establish compliance.
includedCompensation = fixedSalary + includedAdditionalPay
regularRate = includedCompensation / actualHours
overtimeHours = max(actualHours - threshold, 0)
halfTimePremiumRate = regularRate x (multiplier - 1)
overtimePremium = halfTimePremiumRate x overtimeHours
estimatedTotal = includedCompensation + overtimePremiumThe same $900 salary at 45 and 50 hours
At 45 hours, the tested result is a $20.00 regular rate, five overtime hours, and $50.00 additional premium. Estimated weekly compensation is $950.00.
At 50 hours, the regular rate falls to $18.00 while overtime rises to ten hours. The half-time premium becomes $90.00, and the modeled total is $990.00. The changing divisor is the point of the comparison.
What this scenario cannot determine
The calculator cannot establish a clear mutual understanding, verify that the salary actually stayed fixed, determine whether hours truly fluctuate, or decide how deductions affect the method. It cannot decide coverage, exemption, compensable time, or whether a bonus is excludable.
State law may prohibit or modify the method. Review current official sources and jurisdiction-specific rules before using the output for payroll. Treat every unchecked condition and minimum-wage warning as a prompt for factual review, not proof of eligibility or ineligibility.
Fluctuating Workweek Calculator FAQ
Why does the regular rate decrease when hours increase?
The modeled fixed salary is divided by actual hours each week, so the divisor changes while the salary remains the same.
Does a fixed salary make someone exempt?
No. Salary payment alone does not decide exemption status, and this tool does not evaluate exemptions.
Are bonuses allowed in this calculation?
The calculator accepts additional pay and uses the treatment selected by the user. Whether a payment must be included depends on applicable rules and facts.
Does checking every condition prove the method is valid?
No. The checklist records assumptions and warnings only; it does not issue an eligibility or legal-validity decision.
Official sources
Educational estimate
This calculator provides an estimate for educational purposes only. Overtime rules vary by country, state, industry, employment status, and company policy. It is not legal, tax, or payroll advice.