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How to Calculate Overtime With Two Different Pay Rates

By Frame Sixty Labs · Last updated: November 6, 2026

When does one week have two pay rates?

More often than it sounds. A cashier who also covers shift-lead hours at a higher rate. A server who bartends two nights a week. A care aide whose weekend hours carry a shift differential. A warehouse worker whose raise took effect on a Wednesday. In each case the week’s hours were paid at two rates, and if the week went past 40 hours, someone has to decide what the overtime rate is.

Two things go wrong at this point. The first is treating each job as its own timesheet, noticing that neither one reached 40, and paying no overtime at all. The second is picking one of the two rates — usually the lower — and paying time-and-a-half on that. Neither is how it works. As general United States guidance, overtime is owed on all hours worked for the same employer in the workweek, regardless of job or rate, and the rate it is based on is the weighted average of everything the employee earned that week.

How do I calculate overtime with two pay rates?

1. Total the hours at each rate, then the week. Add the hours and minutes at rate A, then at rate B, then add the two subtotals. Keep everything in H:MM until the arithmetic is done.
2. Find the overtime hours from the combined total. Overtime is the hours over 40 in the whole workweek. 44:45 − 40:00 = 4:45, no matter how the hours were split between jobs.
3. Convert to decimal. Divide the minutes by 60. 27:15 is 27.25 hours, 17:30 is 17.5, 44:45 is 44.75 and 4:45 is 4.75. Our guide to decimal hours for payroll has a conversion table.
4. Work out straight-time pay. Hours at rate A × rate A, plus hours at rate B × rate B. This pays every hour of the week once, including the overtime hours, at the rate they were actually worked.
5. Find the regular rate. Straight-time pay ÷ total hours. This is the weighted average: it leans toward whichever rate had more hours. Keep all the decimals.
6. Pay half the regular rate on the overtime hours. 0.5 × regular rate × overtime hours. It is half, not 1.5, because the other 1.0 was already paid in step 4.
7. Add and check. Straight-time pay + premium = gross. Then confirm it the other way: 40 hours at the regular rate plus the overtime hours at 1.5 times the regular rate should land on the same cent.

Worked example: a 44:45 week at $16.00 and $20.00

An employee is paid $16.00 an hour as a cashier and $20.00 an hour when scheduled as shift lead. The workweek runs Monday to Sunday. Here is the week of October 26, 2026, from the employee’s own record, breaks already deducted:

Step 1, the totals. Cashier hours: 8:15 + 7:50 + 6:40 + 4:30. The minutes are 15 + 50 + 40 + 30 = 135, which is 2:15, and the hours are 8 + 7 + 6 + 4 = 25, so the subtotal is 27:15. Shift-lead hours: 9:10 + 3:00 + 5:20 = 17:30. The week is 27:15 + 17:30 = 44:45.

Step 2, the overtime. 44:45 − 40:00 = 4:45. Notice that the cashier job alone is under 40 and the shift-lead job alone is well under 40. That does not matter. The employee worked 44:45 for one employer in one workweek.

Step 3, decimals. 27:15 = 27.25 · 17:30 = 17.5 · 44:45 = 44.75 · 4:45 = 4.75.

Step 4, straight-time pay.

• Cashier: 27.25 × $16.00 = $436.00
• Shift lead: 17.5 × $20.00 = $350.00
• Straight time for the week: $436.00 + $350.00 = $786.00

Step 5, the regular rate. $786.00 ÷ 44.75 = $17.5642… an hour. It sits between $16.00 and $20.00, closer to $16.00 because more of the week was cashier hours.

Step 6, the premium. 0.5 × $17.5642 × 4.75 = $41.72.

Step 7, gross pay and the check. $786.00 + $41.72 = $827.72. The other route: 40 × $17.5642 = $702.57 for the first 40 hours, and 4.75 × ($17.5642 × 1.5 = $26.3464) = $125.15 for the overtime, which is $702.57 + $125.15 = $827.72. Both agree.

Why is the premium half the rate, not time-and-a-half?

Because of how the hours were paid in step 4. Every one of the 44.75 hours, including the 4.75 overtime hours, has already been paid once at the rate it was worked. Time-and-a-half means 1.5 times the regular rate on the overtime hours; 1.0 of that is already in the $786.00, so only the remaining 0.5 is owed. That is why the premium is written as 0.5 × regular rate × overtime hours.

If you prefer to think in time-and-a-half, you can: pay the first 40 hours at the regular rate and the overtime at 1.5 times the regular rate. The step 7 check shows this gives the identical $827.72. What you cannot do is pay the first 40 hours at their actual rates and then the overtime at 1.5 times one of the two rates. The regular rate has to be one number for the whole week, and it has to be the weighted average.

What about paying overtime at the rate of the job being worked?

There is a second method. As general US guidance, federal rules allow an employer and employee to agree in advance that overtime hours will be paid at 1.5 times the rate of the job actually being performed during those hours — the “rate in effect” method. In that case there is no weighted average; instead you have to know precisely which hours fell after the 40th.

In the example, the running total reaches 40:00 fifteen minutes before the end of Friday’s shift-lead shift (Monday through Thursday is 34:55, and 34:55 + 5:05 = 40:00). So the overtime hours are the last 0:15 of Friday at $20.00 and all 4:30 of Saturday at $16.00. The premium is half of each rate on those hours: 0.25 × $10.00 = $2.50 plus 4.5 × $8.00 = $36.00, which is $38.50, and gross pay is $824.50.

Same week, same hours, $3.22 less than the weighted average — because the overtime happened to fall mostly on the lower-paid job. Had the same 4:45 all been shift-lead hours the premium would have been 0.5 × $20.00 × 4.75 = $47.50; had it all been cashier hours, $38.00. The rate-in-effect result moves with the schedule. The weighted average does not, which is one reason it is the default when nothing was agreed. Which method applies to you is a question for your employer, your agreement or a qualified adviser, not this article.

How the weighted rate moves with the mix of hours

The same two rates produce a different regular rate every time the split changes. Here is a 44:45 week at $16.00 and $20.00 with the 4:45 of overtime held constant and only the mix varied:

Two rows deserve a second look. In the second row the employee worked exactly 40 cashier hours and then 4:45 as shift lead. It is tempting to say the overtime “was” the shift-lead hours and pay $47.50. Under the weighted average it is $39.01, because the regular rate reflects the whole week, not the last shift. And in no row does the regular rate equal $18.00, the simple average of the two rates, except by coincidence when the hours happen to be equal. Averaging the rates instead of weighting them is one of the mistakes below.

What are the common mistakes?

• Paying each job separately. “Cashier was 27:15 and shift lead was 17:30, so neither one hit 40.” The result is $786.00 and no overtime at all — $41.72 short. Hours for the same employer in the same workweek combine.
• Using the lower rate for all overtime. 0.5 × $16.00 × 4.75 = $38.00, gross $824.00. That is $3.72 short of the weighted answer, and it is not even the rate-in-effect answer, since some of those hours were at $20.00.
• Averaging the two rates. ($16.00 + $20.00) ÷ 2 = $18.00, premium $42.75, gross $828.75. In this week it overpays by $1.03; with most hours at the higher rate it would underpay. The regular rate is weighted by hours, not averaged across job titles.
• Paying 1.5× on the overtime hours on top of straight time for every hour. That pays the overtime hours 2.5 times. Either pay all hours straight and add 0.5×, or pay 40 straight and 1.5× on the rest. Not both.
• Typing H:MM as a decimal. Enter the subtotals as 27.15 and 17.30 and the week becomes 44.45 “hours” with 4.45 of overtime. Straight time comes out as $434.40 + $346.00 = $780.40, the regular rate as $17.5568, the premium as $39.06 and gross as $819.46 — $8.26 short, purely because minutes run to 60 and not 100. Our post on why a phone calculator can’t add time explains the trap.
• Rounding the regular rate early. $17.56 × 0.5 × 4.75 = $41.71, a cent short. Over a year of weeks and a whole payroll it adds up. Round once, at the end.
• Forgetting the differential or the mid-week raise. A shift differential is a second rate, and so is a raise that took effect on a Wednesday. Both go into straight-time pay before the regular rate is calculated, and both raise it.

How do I check a paycheck that mixes two rates?

Rebuild it from your own record using the seven steps, and compare line by line rather than just the total. A stub for the example week should show something equivalent to 27.25 hours at $16.00, 17.5 hours at $20.00 and an overtime premium line of 4.75 hours at $8.78 (half of $17.5642), or the same money arranged as 40 regular hours and 4.75 overtime hours at the blended rates. If the stub shows 44.75 hours and no overtime line, or 4.75 hours at exactly $8.00, you have found the problem. Our guide to checking if your paycheck is correct walks through the comparison, including what to do when the total hours match but the money does not.

Frequently asked questions

Do hours at two different jobs for the same employer count toward overtime together?

As general US guidance, yes. Overtime is based on all hours worked for the same employer in the workweek, whatever the job title or rate. 27:15 at one rate and 17:30 at another is a 44:45 week with 4:45 of overtime, even though neither job alone reached 40. Rules vary by state and agreement.

What is the weighted average overtime method?

Divide the week’s total straight-time pay by total hours to get one regular rate, then pay an extra half of that rate on each hour over 40. $786.00 over 44.75 hours is $17.5642; 4.75 overtime hours earn 0.5 × $17.5642 × 4.75 = $41.72; gross is $827.72.

Why is the overtime premium half the rate and not 1.5 times?

Because straight time on the overtime hours is already included when every hour is paid at its own rate. Only the extra half remains. Paying 40 hours at the regular rate and the rest at 1.5 times it gives the same total: $702.57 + $125.15 = $827.72.

Can overtime be paid at the rate of the job worked during the overtime hours instead?

As general US guidance, federal rules allow a rate-in-effect method when it was agreed in advance: the overtime hours earn 1.5 times the rate of the job actually being done in those hours. You need to know exactly which hours fell after the 40th. Without such an agreement the weighted average is the default. This is not legal advice.

Does a shift differential count as a second pay rate?

Yes. Hours with a differential are hours at a higher rate, so the differential goes into straight-time pay and raises the weighted average regular rate before the premium is calculated. The same is true of a rate that changed partway through the week.

What if I average the two hourly rates instead of weighting them?

You get the wrong regular rate unless the hours at each rate happen to be equal. The simple average of $16.00 and $20.00 is $18.00, but 27.25 hours at $16.00 and 17.5 hours at $20.00 weight to $17.5642. The simple average overpays by $1.03 in that week and would underpay if most hours had been at the higher rate.