Direct answer
Build the estimate from direct labor, materials, equipment, disposal, travel, and a fair share of overhead. Add a risk allowance for uncertain work, then calculate the selling price using the margin your business needs—not by copying a competitor's number.
Write down the full cost of the job
Start with the work you can observe: crew hours, wage burden, materials, equipment time, subcontractors, permits, disposal, travel, and cleanup. Then assign an appropriate portion of recurring overhead such as insurance, software, vehicles, rent, administration, and nonbillable sales time.
A quote that covers materials but ignores loaded labor and overhead can look busy while losing money. Keep assumptions next to the estimate so you can compare them with what actually happened after the job.
Use margin and markup correctly
Markup is added to cost; margin is the portion of the selling price left after the covered cost. They are related but not interchangeable. If a job costs $800 and sells for $1,000, the markup on cost is 25 percent while the gross margin on sales is 20 percent.
Choose a target that fits the business, the type of work, demand, warranty exposure, and uncertainty. There is no universal correct percentage.
Review the result before sending it
Check quantities, tax treatment, exclusions, schedule assumptions, payment terms, and the exact work included. For uncertain conditions, use allowances or clearly priced options rather than hiding risk inside a vague total.
After the job, compare estimated and actual labor, materials, and delays. That feedback is more valuable than a one-time perfect-looking spreadsheet because it improves the next estimate.
Common questions
What is the difference between markup and margin?
Markup compares profit with cost; margin compares profit with the selling price. A 25 percent markup on $800 creates a $1,000 price and a 20 percent gross margin.
Should every job use the same margin?
Not necessarily. Capacity, complexity, uncertainty, equipment, warranty risk, and competitive conditions can differ. Use a documented policy and review exceptions.
What belongs in overhead?
Recurring costs that support the business but are not tied neatly to one job, such as insurance, administration, rent, software, vehicles, and nonbillable time.
Sources and further reading
- Break-even PointU.S. Small Business Administration
- Job Cost EstimatingVirginia Cooperative Extension
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