How to Calculate Overtime When Construction Workers Earn More Than One Pay Rate

If your plumbing company client runs a crew of any real size, there's a good chance some of those workers are paid using an ITIN instead of a Social Security number. It's common in the trades, and there's nothing wrong with it — but it's also one of the easiest places for payroll to go quietly wrong. 

On Monday, your foreman runs the excavator. On Wednesday, he's framing. On Friday, he's back on general labor. That's three jobs at three pay rates in one week, and if he works more than 40 hours, his overtime might be calculated wrong.

This is one of the most common payroll mistakes we see in construction. It's rarely intentional. Many payroll systems default to paying overtime at one rate, usually the lowest one or whatever rate the worker happened to be on last. Under federal law, that may not be enough.

Here's how overtime is supposed to work when a worker earns more than one rate, and what you can do to get it right.

Why This Comes Up So Often in Construction

Construction crews don't stay in one lane. A single worker might:

• Operate equipment at a higher rate and do cleanup at a lower rate
• Work a prevailing wage job in the morning and a private job in the afternoon
• Earn a different rate for a specialty trade like concrete finishing or welding
• Pick up shift or hazard differentials on certain jobs

Each of those can mean a separate hourly rate on the same timecard. Once total hours pass 40 in the workweek, the question becomes: time and a half of what?

The Default Rule: The Weighted Average Method

Under the Fair Labor Standards Act, the default is to calculate a weighted average "regular rate" for the week. Overtime is then based on that blended rate, not on whichever rate is easiest.

Here's how it works for a worker who puts in 50 hours in one week:

1. Add up straight-time pay for all hours: $1,300.00
2. Divide by total hours worked to get the regular rate: $1,300 ÷ 50 = $26.00 per hour
3. Figure the overtime premium, which is half the regular rate for each overtime hour: $13.00 × 10 hours = $130.00
4. Add it to straight-time pay: $1,300.00 + $130.00 = $1,430.00

If that same week were paid with overtime at the $20 labor rate, the premium would come out to $100.00. That's $30 short for one worker in one week. Across a crew of 20 over two years, a small shortfall like that can add up to tens of thousands of dollars in back wages.

The Alternative: Paying Overtime at the Rate for the Work Performed

Federal rules also allow another option. You can pay overtime at one and a half times the rate for the work the employee was actually doing during the overtime hours. For example, if all 10 overtime hours in the example above were spent on general labor, overtime would be paid at $30.00 per hour (1.5 × $20).

This method comes with conditions:

• The employer and employee have to agree to it before the work is performed
• The agreement should be documented in writing
• Your time records have to show exactly which hours were spent on which type of work

Without that advance agreement and detailed time tracking, the weighted average method generally applies. State rules might add their own requirements, and prevailing wage jobs can have separate overtime and fringe benefit rules, so it's worth confirming how they apply to your crews.

Common Mistakes That Can Lead to Back Wages

These are the errors that tend to show up when the Department of Labor reviews construction payroll:

• Paying overtime at the lowest rate the worker earned that week
• Paying overtime at whatever rate was entered last on the timecard
• Treating each job or project as its own workweek, so no single job goes over 40 hours
• Leaving bonuses or differentials out of the regular rate calculation
• Not keeping records of which hours were worked at which rate

If the DOL finds underpaid overtime, employers might owe back wages for up to two years, or three years if the violation is found to be willful. They can also owe an equal amount in liquidated damages, which can double the bill.

How Baron Payroll Can Help

Baron Payroll has worked with construction businesses for over 25 years. We understand that your crews don't fit a one-size-fits-all payroll setup.

We can help you set up multiple pay rates per worker, track hours by job and rate, and calculate overtime correctly every pay period. Unlike some large national providers, you'll talk to a US-based team that knows construction payroll, not a call center reading from a script.

Want to see what it would cost? Get an instant price at baronpayroll.com/instant-price, without even speaking with a salesperson.

Frequently Asked Questions

How do you calculate overtime for an employee with two pay rates?

Add up straight-time pay for all hours worked in the week, then divide by total hours to get the weighted average regular rate. Each overtime hour gets an extra half of that rate on top of straight-time pay.

Can I pay overtime at the lower of two rates?

Generally, no. Unless you have an advance agreement to pay overtime at the rate for the work performed during overtime hours, overtime is based on the weighted average of all rates earned that week.

Does each job site count as a separate workweek?

No. Under federal law, the workweek is a fixed, recurring period of 168 hours. All hours worked for the same employer in that week count toward overtime, no matter how many jobs or sites they're spread across.

Do bonuses count toward the regular rate?

Many do. Nondiscretionary bonuses, such as production or attendance bonuses, and shift differentials are generally included in the regular rate, which raises the overtime premium.

How far back can the DOL go for unpaid overtime?

Usually two years, or three years if the violation is willful. Employers might also owe an equal amount in liquidated damages.

If you found this article helpful, here are some others you might like: