Job Profit Calculator
The tool totals every cost of the job and subtracts it from the price you charged.
Enter Values
How to use this calculator
- Enter the revenue (the total price you charged the customer for the job).
- Add the job's costs: materials, labour hours and rate, and any other overhead. Leave a field blank to treat it as zero.
- Press Calculate to see net profit, total cost, and your net profit margin.
How it works
The tool totals every cost of the job and subtracts it from the price you charged. Labour cost = labour hours × labour rate. Total cost = materials + labour cost + overhead. Net profit = revenue − total cost.
Two profitability ratios come from those figures. Net profit margin = net profit ÷ revenue × 100 (profit as a share of the price you charged). Markup on cost = net profit ÷ total cost × 100 (profit as a share of what the job cost you). A margin can never exceed 100%, but a markup can.
Worked example
5,000 job, 1,200 materials, 40 h at 55/h, 300 overhead. Labour cost = 40 × 55 = 2,200. Total cost = 1,200 + 2,200 + 300 = 3,700. Net profit = 5,000 − 3,700 = 1,300, a net margin of 26% (and a 35.14% markup on cost).
Common mistakes
- Leaving out overhead — insurance, fuel, tool wear, admin time — which quietly turns a paper profit into a loss.
- Confusing margin with markup. A 50% markup on cost is only a 33.3% margin; they answer different questions.
- Forgetting to include your own labour hours, so the job looks profitable only because you didn't pay yourself.
Frequently asked questions
What's the difference between profit margin and markup?
Margin is profit as a percentage of the price you charged (net profit ÷ revenue). Markup is profit as a percentage of what the job cost you (net profit ÷ total cost). The same job always shows a higher markup than margin.
Should I include my own labour in the costs?
Yes. Enter your hours and an hourly rate you'd pay yourself. If you leave your labour out, the profit shown is really just covering your wage rather than being true profit on the job.
Does this include GST or sales tax?
No. Enter figures excluding tax for a clean profit picture. Tax you collect isn't income — it's passed on to the tax office, so mixing it in overstates your profit.
What if the net profit is negative?
The job cost more than you charged, so it ran at a loss. Raise the price, cut a cost, or use the figures to quote better next time.
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Cite this tool
Zerdly. (2026). Job Profit Calculator. Retrieved from https://www.zerdly.com/tools/job-profit-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.