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Electrical Job Cost Calculator

Compare what a job was supposed to cost against what it actually cost, and see exactly where the margin moved.

An estimate predicts whether a job should be profitable. Job costing shows what actually happened once the labor hours were worked, the material invoices arrived and the last trip to the supply house was made.

This calculator compares estimated and actual labor, materials and other direct job costs so electrical contractors can identify where a job gained or lost margin. It uses only the numbers you enter — no assumptions, no averages, no recommended targets. Learn how electrical job costing works.

Run the numbers

Estimate

Required. The contract or invoiced amount for this job.

Field wages plus payroll burden for the hours worked on this job.

Only include allocated overhead here if your job-costing method uses a separate overhead allocation. Do not double-count overhead already embedded in another cost input.

Actual

Required. The contract or invoiced amount for this job.

Labor Hours (Optional)

Enter both fields to see labor hour variance. Financial results are calculated with or without them.

Your results

Enter the estimate and the actual figures for a completed job, then select Calculate Job Results.

Everything is calculated in your browser. Nothing you enter is saved, stored or transmitted.

What Is Electrical Job Costing?

Job costing is the practice of collecting every cost a specific job consumed — loaded labor, materials, rentals, subcontractors, permits and any overhead your method allocates — and comparing that total against what the job billed.

The output is a profit figure and a margin figure that reflect the work as it was performed rather than as it was priced. For the full process, read the electrical job costing guide.

Estimate vs Actual

An estimate is a forecast built from assumptions: how many hours the work should take, what the material package should cost, which crew should run it. Job costing is the scorecard that grades those assumptions after the fact.

Neither number is more important than the other. The estimate sets the price and the actual result tells you whether the pricing model behind it still holds. Reviewing the two together is what turns one job's outcome into a better bid on the next one.

Why Labor Variance Matters

Labor is usually the largest and least predictable cost on an electrical job, and it is the category most often responsible for the gap between estimated and actual profit. Tracking both actual hours and actual loaded labor cost separates two different problems: the job took longer than expected, or the hours cost more than expected.

Loaded labor cost only reflects reality if the underlying rate does. How to calculate an electrical labor rate walks through the build-up, and the labor rate calculator produces the figure. Because overhead recovery sits inside that rate for many contractors, it is worth reviewing how to calculate electrical business overhead and running the overhead calculator before deciding whether to allocate overhead per job.

Why Margin Variance Matters

Dollars of cost variance tell you how far off the estimate was. Margin variance tells you what that miss did to the profitability of the job as a share of its revenue, which is the figure that scales across a year of work.

Margin variance is reported in percentage points because a job estimated at a 30% margin that finished at 20% dropped ten points — describing that as a 33% decline invites confusion. Markup vs margin for electrical contractors covers why the base of a percentage matters, and the markup vs margin calculator converts between the two.

How Job Costing Improves Future Pricing

One job's variance is an anecdote. A pattern across ten jobs is information. When the same category runs over on the same type of work, the estimating assumption behind it is wrong and can be corrected — hours per fixture, material waste, travel time, callback exposure on a particular customer or service mix.

That feedback loop is what connects job results back to your labor rate, overhead recovery and markup decisions. Explore the pricing and profitability hub or browse the rest of the contractor tools.

Frequently Asked Questions

It is a tool that places the estimated cost of an electrical job next to what the job actually cost, then reports the difference in dollars and in margin. It uses only the figures you enter — there are no hidden assumptions, industry averages or recommended targets built into it.

Subtract total job cost from job revenue. Total job cost is loaded labor plus materials, equipment and rentals, subcontractors, permits and job-specific fees, and any overhead your method allocates to the job. Profit = Revenue − Total Cost.

Divide actual profit by actual revenue. A job that produced $2,000 of profit on $10,000 of revenue finished at a 20% margin. Margin is always measured against revenue, not against cost.

Cost variance is actual total cost minus estimated total cost. A positive number means the job cost more than estimated. A negative number means it cost less. The same subtraction applied category by category shows where the difference came from.

Margin variance is actual margin minus estimated margin, expressed in percentage points. A job estimated at a 30% margin that finished at 20% has a margin variance of −10 percentage points. Percentage points avoid the ambiguity of describing that gap as a percentage change.

It depends on your method. If overhead recovery is already built into your loaded labor rate, adding it again as a separate job cost double-counts it. Either allocate overhead explicitly and keep it out of the labor figure, or leave the overhead field blank and evaluate overhead at the company level.

Callback labor, materials and travel are real costs of the job that produced them. When they are left out, a job appears to have finished stronger than it did, and the estimating assumptions behind it never get corrected. Adding callback costs to the actual side keeps the comparison honest.

Yes. If actual costs exceed actual revenue, profit is negative and margin is negative even though the invoice was collected in full. This calculator displays loss outcomes rather than blocking them.

Turn Job Results Into Better Business Decisions

Job-cost results are only useful when they feed something. The same numbers inform pricing, estimating assumptions, labor and utilization expectations, overhead recovery and the profitability reviews that catch a trend before it repeats for a year.

Contractor Core walks through those pieces together so a completed job becomes an input to how the business runs rather than a number that gets filed away.

Explore Contractor Core