A construction labor calculator answers the question the material takeoff leaves open: how many crew hours the quantities take, and what those hours cost once the wage is loaded with everything an employer pays on top of it. The arithmetic is quantity divided by a production rate to get hours, and hours times a burdened hourly cost to get the line, and both figures have to be the contractor's own, from the crew's actual pace and the payroll's actual cost. This page works the framing labor on the 40 by 30 house used across this site with a three-person crew, sets out what goes into the burdened rate, and says where the labor line sits in the estimate. The construction cost estimator on this site carries labor at your own rates.
Hours: the quantity divided by the crew's production rate
A production rate is what the crew actually does in an hour: square feet of wall framed, sheets of sheathing hung, linear feet of plate set. It comes from the last job's timesheets against the last job's quantities, not from a book, because a book's rate is somebody else's crew on somebody else's site. On the worked house the wall framing quantity from the takeoff, divided by the three-person crew's measured rate, gives the crew hours, and the roof, the floor and the stairs each get their own rate and their own hours. The sum is the framing hours, and a rate measured once and reused is the single biggest improvement a small contractor can make to an estimate.
The burdened rate: what an hour actually costs
The wage is the start. On top of it the employer pays the payroll taxes, workers' compensation at the trade's rate, liability insurance allocated per hour, any benefits, paid time off spread over the hours worked, and the small tools and consumables the crew uses. The burdened rate is the wage plus all of them, per productive hour, and for a framing crew it is well above the wage on the paycheck. The IRS's guidance on contractor versus employee status, linked below, is the reminder that a worker paid as a contractor but managed as an employee is an employee for these costs whatever the paperwork says, so the burden has to be estimated on the true status.
The line: hours times the burdened rate, by trade
Framing hours times the framing crew's burdened rate is the framing labor line, and every self-performed trade gets the same treatment with its own rate. On the worked house the framing labor line sits beside the framing material line from the takeoff, and the two together are the framing cost the estimate carries against the framing sub's quote if the contractor is deciding whether to self-perform. A labor line built from a single blended rate across trades hides the difference between a laborer's hour and a finish carpenter's, and the estimate is wrong in both directions at once.
Supervision, fall protection and the hours the production rate does not include
The production rate covers productive hours. Around them are the hours the crew spends setting up, moving materials, installing and moving fall protection, which the construction standard linked below requires above a stated height, and cleaning up, and a supervisor's hours across the whole job. Those are carried as their own lines or as a stated share on the productive hours, written down so the next estimate uses the same rule. The construction cost estimator on this site takes the hours and the burdened rate per trade and prints the labor lines beside the materials, and DrawScheduleWorks Pro keeps the timesheets against the job so next year's production rate is measured, not remembered.
Questions people ask about construction labor calculator
How do you calculate construction labor cost?
Quantity divided by the crew's measured production rate gives hours; hours times the burdened hourly cost gives the line. Both figures are the contractor's own, from timesheets and payroll, per trade.
What is a burdened labor rate?
The wage plus everything the employer pays on top: payroll taxes, workers' compensation, allocated liability insurance, benefits, paid time off spread over hours worked, and small tools. Per productive hour, it is well above the wage.
What hours does the production rate leave out?
Set-up, moving materials, installing fall protection, clean-up and supervision. They are carried as their own lines or as a stated share on the productive hours, with the rule written down.