What Labor Burden Actually Costs You Per Hour

You pay a carpenter thirty dollars an hour. You estimate a job at forty hours of his time and put twelve hundred dollars of labor into the quote. That number is wrong, and depending on your state and your trade, it might be wrong by five hundred dollars.

The wage is what lands in his account. The cost is what leaves yours, and the gap between the two is labor burden.

What's actually in the burden

Everything you pay because that person is employed, beyond the hourly rate itself.

• Employer payroll taxes: Social Security, Medicare, and federal and state unemployment
• Workers compensation premiums, which vary enormously by trade classification
• General liability, to the extent it's driven by payroll
• Health insurance and any retirement contribution
• Paid time off, holidays, and sick days, which are hours you pay for and get no production from
• Training, certifications, and license renewals
• Tools, boots, uniforms, and phone allowances
• Vehicle cost if a truck goes home with them

Workers comp is usually the one that shocks people. It's rated by trade classification, and a roofer's rate can be several multiples of a carpenter's for the same wage. Two businesses paying identical hourly rates can have very different true costs purely because of what their crews do.

The calculation

Total your indirect employment costs for a period, typically a year. Divide by total base wages for the same period. That gives your burden as a percentage of wages.

If base wages were 200,000 and burden costs came to 70,000, your burden rate is 35 percent. Applied to a thirty dollar wage, true cost is 30 plus 35 percent, which is 40.50 an hour.

Across the industry, burden commonly lands somewhere between 30 and 60 percent. Lower end for a business with minimal benefits in a low-risk trade. Upper end for a trade with high workers comp exposure, real health coverage, and generous time off. What matters is your own number, calculated from your own books, not the range.

The error almost everyone makes

Here's the part that catches even contractors who do calculate burden. When you convert an annual cost to an hourly cost, the divisor has to be productive hours, not paid hours.

A full-time year is often treated as 2,080 hours. Nobody produces 2,080 billable hours. Subtract vacation, holidays, sick days, training, shop time, travel between jobs, and the hours that vanish into loading, unloading, and waiting on a delivery. What's actually billable is frequently in the 1,600 to 1,800 range, sometimes lower.

Dividing by 2,080 instead of 1,700 understates your hourly cost by roughly twenty percent. That error sits on top of any burden you've already calculated, and it's the single most damaging mistake in the whole exercise because it hides inside a calculation that looks rigorous.

The clean way to think about it: you are recovering a full year of employment cost across only the hours you can actually sell. Fewer sellable hours means each one has to carry more.

What this does to your estimates

Take the carpenter again. Thirty dollar wage, 35 percent burden, and productive hours of 1,700 against 2,080 paid. True cost per productive hour is somewhere around fifty dollars, not thirty.

A forty hour job estimated at the wage is 1,200. At true cost it's about 2,000. If you then applied a markup to the 1,200 believing it was cost, your entire profit calculation was built on a number eight hundred dollars short of reality. On a job you thought carried thirty percent margin, you may have made nothing at all.

This is how a busy contractor with good reviews and full schedules ends the year wondering where the money went. Nothing dramatic happened. Every job was priced off a wage instead of a cost.

Owners and working partners count too

If you're on the tools, your hours are job cost at a burdened rate, the same as anyone else's. Treating your own labor as free because you don't cut yourself a paycheck makes every job look more profitable than it is, and it prices you into a business that can never afford to replace you.

The test is simple. If you had to hire someone to do what you did on that job, what would it cost? That number belongs in the estimate.

Set it once, apply it everywhere

Burden is not a per-job decision. It's a rate you calculate annually, review when insurance renews or the crew changes, and apply to every hour in every estimate automatically.

Where it goes wrong is when the burdened rate lives in one person's head or in a spreadsheet nobody opens. The estimate gets built with a round wage figure because that's what everyone remembers, and the careful calculation sits in a file doing nothing. Pricing that pulls the burdened rate from one place, updated once, keeps every quote honest without anyone having to remember to be careful.

Once the real number is in front of you, some of your jobs will look worse than you thought. That's the point. You cannot fix a margin you can't see.