In an illustrative job, revenue of $100,000 and defined direct costs of $75,000 leave $25,000 before the remaining costs included outside that direct-cost definition. Gross margin under that definition is $25,000 ÷ $100,000 = 25%. Markup on the $75,000 cost is $25,000 ÷ $75,000 = about 33.33%.
The denominator changes the answer. Agree on which labor, material, subcontractor, and other costs belong in the company’s calculation. Keep the same definition in the estimate and completed-job report.
Do not compare a labor-only service metric with an installation metric containing equipment and subcontractor costs without explaining the difference. A useful comparison needs a consistent cost basis and job category.