Painting profit is a coverage-and-hours problem. Get the square footage, coats, and prep right and the estimate holds; miss the prep and the labor overruns quietly.
What drives cost in a paint job
- Coverage: square footage divided by paint coverage per gallon, adjusted for surface texture.
- Coats and primer: a second coat or primer roughly changes material and labor together.
- Surface prep: scraping, patching, sanding, and caulking — usually the biggest source of labor overrun.
- Masking and protection: covering floors, trim, and fixtures takes real setup time.
- Burdened labor hours: production rate per square foot at a burdened rate.
Worked example
Paint, primer, and supplies $900, prep and masking materials $150, labor 40 hours at $36 ($1,440), and $110 of other cost give a direct cost of $2,600. A 12% overhead allocation adds $312 for a total of $2,912. Priced for a 25% margin, the job quotes at $3,882.67, an estimated profit of $970.67.
Pre-quote checklist
- Measured wall and ceiling area, not floor area.
- Number of coats and whether primer is needed.
- Honest prep hours for the surface condition.
- Masking, protection, and cleanup time.
- Access, height, and cut-in complexity.
Frequently asked questions
How is a paint job estimated?
From wall and ceiling area divided by coverage per gallon, adjusted for coats and primer, plus honest prep and masking hours.
Why does prep matter so much?
Scraping, patching, and caulking are the most common source of labor overrun. Underestimating prep is what turns a paint job unprofitable.
Should I measure floor area or wall area?
Wall and ceiling area. Floor area does not reflect the surface actually being painted.
What to do next
The MarginJob calculators use the same profit method for every trade. This page adds the cost lines and checks that matter for this specific type of work. Planning estimates only; verify quantities, codes, and pricing with current project documents.