Trade job profitability calculator
Before you commit to a price, check the job actually pays. Enter the quote and your costs to see the gross profit, the margin, and what is left before overheads, with a warning if the margin is too thin.
How it works
Gross profit here is the quoted price minus everything you buy in for the job: materials, fuel, subcontractors, waste, lead costs and anything else. It does not yet take your own labour out, so it shows the headroom you have to cover your time and still come out ahead.
Net before overheads then takes the labour off too (your hours at your cost per hour, not your charge-out rate). That is the figure that tells you whether the job genuinely pays once your time on the tools is accounted for.
How to use the result
If the net margin is thin or negative, the job is not earning its keep. Either the price is too low, the labour estimate is too high, or the bought-in costs have crept up since you last quoted this kind of work. Adjust the price until the net margin gives you a comfortable buffer over your overheads, then quote from there rather than from a day rate.
This shows profit on the job before business overheads (premises, admin, insurance not tied to the job, your own wage) and before tax. Net before overheads is not take-home pay.