Contractor Profit Per Job Calculator — guide

The calculator takes the revenue you charge for a job and subtracts all the direct costs associated with completing it: materials, labor (yours and subcontractors'), travel mileage, fuel, tolls, parking, and any other job-specific costs. The result is an estimated gross profit and margin for that job.

It is designed for independent contractors, tradespeople, consultants, and small construction businesses who want to understand job-level profitability before, during, or after a project.

Independent contractors, tradespeople, and construction businesses estimating whether a job is profitable before quoting.

Contractors reviewing completed jobs to understand actual margin.

Freelancers and consultants who bill by project rather than hourly rate and want to understand their effective cost structure.

Anyone who drives to job sites and wants to include the mileage cost in their profitability analysis.

Required — Job revenue: the total amount billed or to be billed to the client for this job.

Optional — Materials cost: all materials, supplies, and parts purchased for the job.

Optional — Labor cost: wages or subcontractor payments for work on the job (not including your own time if you are the sole worker, unless you assign yourself a cost rate).

Optional — Mileage: miles driven to and from the job site. The tool applies the IRS standard mileage rate as a cost reference for this field.

Optional — Fuel cost: separate fuel cost if you prefer to enter it directly rather than use the mileage reference.

Optional — Tolls and parking: job-related road tolls and parking fees.

Optional — Other direct costs: permits, equipment rental, disposal fees, or any other job-specific expense.

Total direct costs = materials + labor + mileage cost + fuel + tolls/parking + other costs.

Mileage cost = miles × IRS standard business mileage rate for the current period (used as a reference only — not a filed deduction).

Gross profit = job revenue − total direct costs.

Gross margin % = gross profit ÷ job revenue × 100.

The tool does not model overhead allocation, indirect costs, or taxes. The profit shown is gross, not net.

Results show total direct costs, gross profit in dollars, and gross margin percentage. A positive margin indicates the job covers its direct costs; a negative margin indicates a loss on direct costs alone.

Keep in mind that gross margin must also cover your business overhead (office costs, insurance, marketing, and so on) before arriving at true net profit. A 40% gross margin is often considered a healthy starting point for contractors, though this varies significantly by trade and region.

A plumbing contractor prices a bathroom fixture installation job:

Revenue: $2,400.

Materials (fixtures, fittings, pipe): $620.

Labor (helper for 4 hours at $35/hr): $140.

Mileage to/from site (80 miles × $0.725 IRS reference): $58.

Parking: $12.

Total direct costs: $830.

Gross profit: $2,400 − $830 = $1,570.

Gross margin: $1,570 ÷ $2,400 = 65.4%.

The tool calculates gross profit only — it does not account for overhead costs (rent, insurance, marketing, accounting fees) that must be covered from gross profit to arrive at net profit.

The mileage cost shown uses the IRS reference rate as a proxy for vehicle operating cost. Depending on your vehicle, actual cost per mile may be higher or lower.

Labor cost should include your own labor at a realistic market rate if you want an accurate margin — otherwise the profit figure will be overstated by the value of your time.

Every truck roll has a mile cost. MileLedger logs job-site miles and related expenses on your phone as you work, so your mileage records stay organized job by job rather than as an undifferentiated annual total.

Learn more at /solutions/construction.