Labor Burden Rate Builder

What Is Labor Burden?

Labor burden is the total cost of employing a worker beyond their base hourly wage. It includes payroll taxes the employer is required to pay, workers compensation insurance, and any benefits the employer provides. When you add all of these to the base wage, you get the true cost of an hour of labor — what it actually costs the business each time an employee works one hour.

Most contractors know what they pay their workers. Fewer know what those workers actually cost. The gap between the two is the burden, and it is larger than most people expect. On a typical construction crew, labor burden adds 25% to 40% above the base wage before any benefits are factored in. Add health insurance and the number climbs further.

Why It Matters for Estimating

If you bid jobs using bare wage rates without factoring in labor burden, you are systematically underbidding your true labor cost. A worker earning $28 per hour with a 35% burden rate actually costs $37.80 per hour. If you bid at $28, you absorb $9.80 per hour in unrecovered cost on every hour that worker puts in. On a job requiring 5,000 labor hours, that is $49,000 in unrecovered labor burden — before you account for any other estimation errors.

The labor burden rate is one of the most important inputs in your estimating process. Getting it right does not guarantee a profitable job, but getting it wrong guarantees a loss that never shows up until you are already committed.

What This Calculator Includes

The calculator builds your burden rate from four cost components:

FICA — the employer's share of Social Security and Medicare taxes, fixed at 7.65% of gross wages. This is non-negotiable and applies to every employee.

SUTA — your state unemployment insurance tax rate. This varies by state and by your claims history. The default of 2.7% is typical for a new account in most states, but your actual rate may be higher if you have had layoffs or claims. Check your annual state rate notice for your exact figure.

Workers compensation — entered as a percentage of wages. For contractors, this is one of the largest burden components and varies significantly by class code and by your experience modifier. A roofing contractor pays a very different workers comp rate than a painting contractor. Find your rate on your policy declarations page.

Health insurance — the employer-paid monthly premium per employee. Enter only the amount the company pays, not the employee's contribution. If you do not offer health insurance, leave this at zero.

What the Calculator Does Not Include

FUTA — the federal unemployment tax — is not included. At approximately $42 per employee per year, it is immaterial for most construction labor groups and would not meaningfully change the burden rate.

Retirement plan contributions, paid time off, and other voluntary benefits are also not included. If you contribute to a 401k match or pay out significant PTO, you should add those costs to your burden rate manually. The Benefits Cost as a Percentage of Payroll calculator on this site can help you quantify those additional items.

Using the Burden Rate in Estimating

Once you know your burden rate per hour, use it as your all-in labor cost when building job estimates. If your burden rate is $37.80 per hour and a task requires 200 labor hours, your true labor cost for that task is $7,560 — not $5,600 based on the base wage alone.

Many contractors express the burden as a multiplier rather than a dollar rate. A 1.35x multiplier means that for every dollar of base wages, the true cost is $1.35. Both approaches produce the same result — use whichever integrates more naturally into your estimating system.