Electrical Bid Calculator

Frequently Asked Questions

What is a labor unit in electrical estimating?

A labor unit is the number of labor hours it takes to install one item under normal conditions — for example 0.5 hours to install a receptacle, or 0.05 hours per foot of 3/4in EMT. You count the quantities off the drawings, multiply each by its labor unit to get hours, then multiply hours by your loaded labor rate to get labor cost. Published unit tables from NECA and distributor manuals are common starting points, but the units that matter are the ones calibrated to how your own crews actually perform.

How do you calculate an electrical bid?

Four steps. First, take off quantities by item from the drawings. Second, apply labor units to get total labor hours, then adjust for job conditions — height, occupied buildings, overtime, and difficult access all add hours. Third, price material and add waste. Fourth, add your labor burden, overhead recovery, and target profit on top of true cost. The common failure is treating overhead and profit as one 20% number bolted on at the end, which quietly prices overhead recovery as if it were margin.

What is a labor factor or difficulty factor?

Labor units assume clean new-construction conditions at normal height with open access. Real jobs rarely match that. A difficulty factor multiplies your base hours to account for conditions: work above about 12 feet, occupied or operating buildings, retrofit and demolition, restricted hours, congested ceilings, or a compressed schedule. Factors of 1.1 to 1.5 are routine on renovation and occupied work, and leaving the factor at 1.0 on that kind of job is one of the most common ways electrical bids go underwater.

What is labor burden for an electrical contractor?

Labor burden is everything you pay on top of the base wage: payroll taxes, workers compensation, liability insurance, health benefits, pension or annuity contributions, vacation, and training. On commercial electrical work burden commonly runs 35% to 60% of base wage, and it is higher again on union work with full fringe packages. Bidding at the bare hourly wage rather than the burdened rate is a reliable way to lose money on a job you thought was profitable.

Should overhead and profit be separate line items?

Yes. Overhead is a cost you must recover to break even — office, vehicles, estimating time, insurance, management salaries. Profit is what is left after every cost including overhead is covered. If you apply a single blended markup you cannot tell whether a job at that price actually earns anything. Recover overhead as a percentage of cost first, then apply your target profit margin on top of the overhead-loaded number.

Why does the same bid come out differently as markup versus margin?

Markup is calculated on cost, margin is calculated on the selling price, and they are not the same number. Adding 20% markup to $100,000 of cost gives $120,000 — but that is a 16.7% margin, not 20%. To actually earn a 20% margin you divide cost by 0.80, which gives $125,000. Estimators who type their target margin into a markup field are systematically underpricing every bid they send out.