Weighted Overtime Calculator
Calculate weighted overtime with two hourly rates, shift differentials and a weekly bonus. See the regular rate, extra half-time premium and gross pay.
One workweek; federal overtime after 40 hours. Before taxes and deductions. State daily overtime, special agreements and hospital 8-and-80 schedules are excluded.
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Working at two hourly rates for the same employer, earning a night differential, or receiving a production bonus can change your overtime rate. This calculator combines those earnings for one workweek and adds the federal overtime premium after 40 hours.
Enter each hour once under rate 1 or rate 2, including overtime hours. Differential hours are a subset of those hours, not extra hours. Use zero for a second rate, differential, or bonus you do not receive. Enter only an includable bonus already allocated to this week.
Calculation sources: DOL Fact Sheet 23; DOL Fact Sheet 56a; DOL Fact Sheet 56c.
Weighted overtime examples
Each row covers one workweek. Straight-time earnings pay every worked hour; the extra half-time premium pays for hours over 40.
| Workweek | Regular rate | OT hours | Extra half-time premium | Gross pay |
|---|---|---|---|---|
| 40 hours at $22; no extras | $22.00 | 0 | $0.00 | $880.00 |
| 48 hours at $22; no extras | $22.00 | 8 | $88.00 | $1,144.00 |
| 30 hours at $20 + 20 at $30 | $24.00 | 10 | $120.00 | $1,320.00 |
| 36 hours at $22 + 12 at $25; $36 shift pay + $120 bonus | $26.00 | 8 | $104.00 | $1,352.00 |
Rates stay unrounded during the calculation. These examples exclude daily overtime, exemptions and special pay agreements.
How the calculation works
- Count all worked hours once: 36 + 12 = 48 hours.
- Base earnings: (36 × $22) + (12 × $25) = $1,092.
- Add 12 differential hours × $3 and a $120 includable weekly bonus: $1,092 + $36 + $120 = $1,248 straight-time earnings.
- Weighted regular rate: $1,248 ÷ 48 = $26/hour.
- Overtime premium: (48 − 40) × $26 × 0.5 = $104.
- Total gross pay: $1,248 + $104 = $1,352, before taxes and deductions.
Keep the regular rate unrounded until the final calculation. Compare this gross total with the same workweek on your pay stub, then ask payroll about any difference and the applicable rules.
What to check on your pay stub
- Whether overtime appears as a full time-and-a-half line or as a separate half-time premium.
- Whether the second rate already includes the shift differential.
- Whether the bonus belongs to one week or must be allocated across several weeks.
This is a gross-pay estimate for the ordinary federal weekly method. It does not determine worker classification, legal entitlement, or final take-home pay.
Frequently asked questions
How do you calculate overtime with two different pay rates?
Add straight-time earnings at both rates, plus includable shift pay and the bonus allocated to the week. Divide by total hours actually worked to get the weighted regular rate. Because straight time already covers every worked hour, add half that rate for each hour over 40.
Why is the added overtime premium 0.5 times the regular rate?
The straight-time total already pays 1 times the rate for all hours, including the overtime hours. Adding another 0.5 times the weighted regular rate for the overtime hours provides the additional premium. Adding a full 1.5 times on top would count straight time twice.
Does a shift differential count toward the overtime rate?
Ordinary night and shift differentials generally enter the regular rate. Enter the extra dollars per hour and only the hours eligible for that differential. For example, a 15% differential on $20 is $3 extra per eligible hour. Do not add it again if rate 1 or rate 2 already includes it.
Which bonuses should I include?
Include nondiscretionary compensation such as a promised production or attendance bonus, using only the amount allocated to this workweek. Genuinely discretionary bonuses can be excluded. A monthly or quarterly bonus may need allocation and overtime adjustments across several weeks; entering the whole payment into one week is not that calculation.
Can I combine two weeks from a biweekly paycheck?
No. Under the ordinary federal weekly overtime rule, calculate each workweek separately. A 50-hour week and a 30-hour week do not become two 40-hour weeks. Add the two separately calculated totals to compare them with a biweekly gross paycheck.
Does this cover California daily overtime or hospital 8-and-80 schedules?
No. It models the ordinary federal 40-hour workweek for a covered nonexempt hourly worker. State daily and seventh-day rules, valid special rate agreements, healthcare 8-and-80 schedules, exemptions, paid leave and tax deductions are outside this model.
Want the full background? Read FLSA Overtime Pay Rules: Calculation Methods, Exemptions & Legal Standards.
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Page updated October 16, 2026. See our methodology and sources. Estimates are informational, not tax, payroll, or legal advice.