If you run a remodeling, construction, HVAC installation, or trade service business with 5 to 15 employees and 5 to 15 active projects at any given time, this article is written for you — and specifically for the moment you close out a job, run the numbers, and realize the margin you budgeted at 22% came back at 11%.
The crew was productive. The schedule held. Materials came in close to estimate. Nobody can explain where the money went.
In most cases, the answer is the same: the labor rate in the estimate was wrong before the job started. Not wrong by a little — wrong by 35% to 55%. Because the rate used was the wage, not the cost. This is exactly the pattern we described in Your Estimate Looked Right. The Job Still Lost Money.
Here is the number that's missing from most trade estimates — and how to calculate it correctly.
What Fully Burdened Labor Rate Actually Means
A wage is what an employee earns. A fully burdened rate is what that employee costs — every hour they are on your payroll.
The gap between those two numbers is not rounding error. It is the difference between a job that makes the margin you budgeted and a job that quietly hands back half of it.
Most contractors price labor at something close to the hourly wage, sometimes with a rough multiplier applied. The problem is that the multiplier is almost never precise enough to cover the real gap, and because nobody tracks it as a line item, the shortfall is invisible until the job closes.
The fully burdened rate includes everything that comes out of the business every time that employee is on the clock or on your insurance policy — whether they are swinging a hammer or waiting for a delivery.
The Components That Make Up the Real Rate
Base wage. The starting point. If a carpenter earns $28/hour, $28 is the floor — not the cost.
Payroll taxes. Employers pay 7.65% in FICA taxes on top of every wage dollar — Social Security and Medicare. On $28/hour, that is $2.14/hour before anyone picks up a tool, according to IRS Publication 15.
Workers' compensation insurance. For trade businesses — framing, remodeling, HVAC installation, roofing — workers' comp rates typically run 5% to 10% of payroll depending on classification and claims history. On $28/hour, that is $1.40 to $2.80/hour added to the true cost of every working hour.
General liability insurance allocation. Your GL policy has an annual premium. That premium is a real cost of labor. Divide your annual GL premium by total annual billed hours, and you get a per-hour allocation. For most trade companies this runs $0.75 to $1.50/hour per field employee.
Vehicle and fuel costs. If your crew uses company vehicles, every hour of their time carries a share of the vehicle cost — fuel, maintenance, insurance, depreciation. A conservative estimate is $0.50 to $1.25/hour per employee assigned to a vehicle.
Non-billable time. This is the most consistently under-counted component. Your $28/hour carpenter does not bill 40 hours in a 40-hour week. Some of that time is drive time to the site, waiting on inspections, attending the Monday morning meeting, making material runs, revisiting a previous phase, or handling a warranty callback. If 15% of their paid hours are non-billable, you are paying $28/hour for time that produces zero billable output — which means your effective burdened rate on the billable hours is already 17.6% higher before adding anything else.
Fully Burdened Labor Rate — Example at $28/Hour Base Wage
That is a 38% premium over the base wage. For a field crew running a 200-hour remodel, the difference between estimating at $28/hour and estimating at the true $38.72/hour rate is $2,144 — on that one employee, on that one job, before any other costs are considered. Across a crew of four and twelve jobs per year, that number becomes significant quickly.
What the Gap Does to a Job That Looked Right
A remodeling contractor estimates a bathroom renovation at $42,000. Labor is priced at $28/hour for a two-person crew over 160 billable hours. That puts labor at $8,960 in the estimate. Target margin: 24%.
When the job closes, the real labor cost — after payroll taxes, workers' comp, vehicle allocation, and non-billable hours — was $12,355. The estimate assumed $8,960. The actual cost was $12,355. The gap is $3,395 — absorbed silently into the margin. The job that looked like a 24% margin came back at 16%.
Nobody made a mistake on the job site. Nobody ordered the wrong materials. The estimate was wrong on the first day, before the crew ever showed up, because it priced labor at the wage instead of the cost.
Margin Impact — Estimated vs. Actual Labor Cost on a $42,000 Job
How to Build the Correct Rate Into Every Estimate
Step 1: Calculate your true burdened rate per employee. Take each field employee's hourly wage. Add FICA (7.65%). Add workers' comp (pull the actual rate from your policy — it varies by classification). Estimate your GL per-hour allocation. Add vehicle costs if applicable.
Step 2: Adjust for non-billable time. Track non-billable hours for one month. If your four-person crew works 640 hours and 90 are non-billable (drive time, meetings, material runs), your billable rate has to cover all 640 hours of cost on 550 billable hours. Divide total cost by billable hours only — not total hours.
Step 3: Build a single number you use every time. Contractors who get this right do not recalculate every estimate. They calculate the fully burdened rate once per employee class (lead carpenter, apprentice, HVAC installer), update it annually when rates change, and apply it to every estimate automatically.
Step 4: Separate the overhead recovery from the margin. A burdened rate is not the same as your overhead recovery or your margin. Once you know the true cost of labor, your estimate still needs to cover fixed overhead (office, tools, admin) and the margin you want to make. Stack these separately so you can see where each dollar is going.
TIM is Digital Labor — a business operating system for US service businesses with 5 to 15 employees running high-ticket projects. TIM's team handles lead follow-ups, professional quotes, project tracking, payment requests, and client communication.
When a quote is built inside TIM's Estimating Agent, labor rates are set at the burdened level, not the wage. Every line item traces back to a confirmed rate, and every deviation from scope is flagged before the work happens — not after the job closes.
The average office and administrative support role in the United States earns between $44,000 and $54,000 per year — roughly $4,000 to $4,500 per month in salary alone, according to the Bureau of Labor Statistics. TIM is priced against that $4,000/month employee, not against $20/month software.
If you are running high-ticket projects and want to stop discovering margin problems after the job closes, see TIM's pricing and find out if there is a fit.
Frequently Asked Questions
What is a fully burdened labor rate?
A fully burdened labor rate is the true hourly cost of an employee to a business — including base wage, FICA payroll taxes (7.65%), workers' compensation insurance, general liability insurance allocation, vehicle and fuel costs, and an adjustment for non-billable hours. For a trade employee earning $28/hour, the fully burdened rate is typically $37 to $42/hour — a 35% to 55% premium over the wage rate.
How do you calculate fully burdened labor rate for construction?
Start with the base wage, add FICA taxes (7.65%), add workers' comp at your actual policy rate, add a per-hour GL insurance allocation (annual premium divided by total billed hours), add vehicle and fuel costs, then adjust for non-billable time by dividing total cost by billable hours only. Update this calculation annually and apply it consistently to every estimate.
Why do contractor jobs lose margin even when labor hours were on budget?
When a contractor estimates labor at the employee's wage rate instead of the fully burdened rate, the estimate is understated by 35% to 55% before the job starts. On a 200-hour job with a $28/hour employee, pricing at wage rather than burdened rate absorbs $1,960 to $3,080 of margin silently. The hours were on budget, but the cost per hour was wrong from day one.
What is the difference between wage rate and burdened rate?
The wage rate is what an employee earns per hour. The burdened rate is what that employee costs the business per productive hour — including all employer taxes, insurance, benefits, vehicle costs, and an adjustment for paid non-billable time. For most trade employees, the burdened rate is 35% to 55% higher than the wage rate. Using the wage rate in estimates creates a systematic margin shortfall on every job.