title: "Overtime With Two Pay Rates: The Weighted-Average Fix" intro: "You clocked 30 hours on the warehouse floor and 15 on the forklift, same employer, same week. The check arrives and the numbers look low. When you wear two hats at two different hourly rates, you don’t pick one rate for overtime. Federal law requires a weighted-average calculation. Here is how to run it, step by step, and catch the errors that shortchange people."
When One Paycheck Carries Two Rates
Any time you work two different hourly rates for the same company inside a single workweek, the Fair Labor Standards Act (FLSA) demands a specific calculation. It happens more often than people think.
A retail worker splits a shift between the sales floor and the stockroom. A mechanic does detailing in the morning and engine repair in the afternoon. A nurse picks up a weekend shift differential but works weekdays at a base rate. It even applies when you do the same job but get a raise mid-week.
The core rule: your rate of pay for overtime purposes is not your highest rate, your lowest rate, or the rate you were working when you crossed 40 hours. It is the average of everything you earned divided by everything you worked. The Department of Labor calls this the “regular rate,” and when multiple rates are in play, you arrive at it through a weighted average.
The legal trigger
Under 29 CFR 778.115, the method is not optional. It is the law. You calculate a true “regular rate” for the entire week. That rate is then multiplied by 0.5 to get the half-time premium, which is added to your total straight-time earnings.
Why the average matters
Fairness. If you worked 30 hours at one rate and 20 hours at a higher rate, your overtime premium must reflect that combined earning power. Pay overtime only on the lower rate and you shortchange the worker on the value of those higher-paid hours.
Who sets the rates
The FLSA overtime threshold and the requirement to use a weighted average are set by the U.S. Department of Labor, Wage and Hour Division. Hourly pay rates themselves are set by employers within the bounds of federal, state, and local minimum-wage laws. For the current federal salary threshold for exempt employees, check the DOL Wage and Hour Division website directly; the figure changes by administrative rule and the 2024 level of $844 per week may have been updated or stayed.
How to Calculate Weighted-Average Overtime
You need a calculator, a timecard, and a list of every cent earned during the week. Do not skip a step.
Step 1: Total all compensation
Add up every dollar of gross earnings for the week. Include base pay, shift differentials, non-discretionary bonuses, and commissions. Leave out discretionary bonuses, gifts, and expense reimbursements.
Step 2: Total all hours
Count every hour worked, across all roles, in the single workweek. Do not separate them yet.
Step 3: Divide to find the average rate
Total Compensation ÷ Total Hours = Regular Rate. That number is your weighted-average rate for the week.
Step 4: Find the half-time premium
Take the regular rate and multiply it by 0.5. You do not pay 1.5 times the average rate on all hours. You pay the average rate on all hours, then an additional 0.5 times the average rate on the overtime hours only.
Step 5: Calculate total pay
Multiply the regular rate by total hours. Then multiply the half-time premium by the overtime hours. Add the two results. That is the gross pay owed.
Worked Example: Two Different Hourly Rates
Make it concrete. You work 25 hours at $16 per hour and 20 hours at $20 per hour. Total hours: 45.
Step 1: Total compensation: (25 × $16) + (20 × $20) = $400 + $400 = $800.
Step 2: Total hours = 45.
Step 3: Regular rate = $800 ÷ 45 = $17.78 per hour.
Step 4: Half-time premium = $17.78 × 0.5 = $8.89.
Step 5: Straight-time pay = 45 × $17.78 = $800.00. Overtime premium = 5 hours × $8.89 = $44.45. Total pay = $844.45.
Notice what you did not do. You did not pay 5 hours at $30 (1.5 × $20). You did not pay 5 hours at $24 (1.5 × $16). You paid the averaged rate on all hours, then added the half-time premium. That is the weighted average.
What the law says about the $16 and $20 rates
The $16 and $20 hourly figures in this example are illustrative rates set by a hypothetical employer. Actual pay rates vary by employer, location, and role. For the current federal minimum wage, visit the DOL Wage and Hour Division site; many states and cities set higher floors, so check your state labor department’s official page.
Worked Example: Base Pay Plus Shift Differential
Now add a shift differential. You are a nurse. You work 36 hours on the day shift at $30 per hour, and 10 hours on the night shift at a $4.00 per hour differential. Total hours: 46.
Step 1: Total compensation: (36 × $30) + (10 × $34) = $1,080 + $340 = $1,420.
Step 2: Total hours = 46.
Step 3: Regular rate = $1,420 ÷ 46 = $30.87 per hour.
Step 4: Half-time premium = $30.87 × 0.5 = $15.43.
Step 5: Straight-time pay = 46 × $30.87 = $1,420.00. Overtime premium = 6 hours × $15.43 = $92.58. Total pay = $1,512.58.
The shift differential is not a gift. It is part of the regular rate. Excluding it is a common error that leads to wage-theft claims.
Where the $30 base and $4 differential come from
The $30 base rate and $4.00 shift differential are employer-set figures used here to show the calculation. Actual nursing pay rates differ by facility, state, and union contract. Check your employer’s published wage schedule or your state nurses association for real-world benchmarks. The DOL confirms that shift differentials must be included in the regular rate; verify current enforcement guidance at dol.gov/agencies/whd.
Weighted Average and the “Blended Rate” Are the Same
You will hear “blended rate” and “weighted average” used interchangeably. They are the same thing. No legal difference. “Blended rate” is the practical name used in payroll departments; “weighted average” is the formal regulatory term.
Do not confuse this with the fluctuating-workweek method. That is a different calculation entirely, used for salaried non-exempt employees whose hours vary, and it pays a half-time premium on all hours worked. The weighted average is for hourly employees with multiple rates. If you are on a fluctuating workweek, you need that specific guide instead.
When the method changes
- Single rate all week: Straight time-and-a-half on hours over 40. No averaging needed.
- Two or more hourly rates: Weighted-average method described here.
- Salaried non-exempt, varying hours: Fluctuating-workweek method may apply; confirm current legal status with the DOL, as the rule has been subject to regulatory changes.
Errors That Trigger Underpayment
Using the highest or lowest rate alone
Some employers pay overtime at the highest rate to “be nice” or at the lowest rate to save money. Both are wrong. The law requires the average.
Dropping shift differentials
The DOL is explicit: shift differentials are part of the regular rate. Excluding them is a violation.
Dropping non-discretionary bonuses
If you earned a production bonus that you knew about in advance, it counts toward the regular rate. That changes your weighted average. The only exception is a true discretionary bonus, which is rare and must meet strict criteria.
Forgetting the 0.5 multiplier
You are not paying 1.5 times the averaged rate on all hours. You pay the averaged rate on all hours (straight-time pay), then an additional 0.5 on overtime hours. That is the half-time method, and it is the correct one for weighted-average calculations.
Rounding hours
You cannot round total hours to the nearest hour to make the math easier. If you worked 44.5 hours, you use 44.5. Rounding is a violation unless it follows strict time-clock rounding rules.
Averaging over two weeks
The workweek is a fixed, recurring 168-hour period. You cannot average hours over a pay period or a month. If the workweek ends on Friday, your calculation ends on Friday.
What to Do Next
The math is unforgiving, and the penalties for getting it wrong are severe.
Pull your timecard and your pay stub. Run the numbers through the five steps above. If the gross pay on your stub does not match, ask payroll for a written explanation. Escalate to your state labor department or the DOL Wage and Hour Division if the answer does not add up.
Audit your payroll system now if you run one. Pull a sample of multi-rate weeks from the last quarter and recalculate them by hand. Fix any discrepancies before a complaint triggers an investigation.
When you are staring at a timecard with multiple rates, do not guess. Run the weighted-average calculation. That is the only way to ensure the check is right.