Contractor Profit Margin Calculator

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Gross Profit vs. Net Profit: What’s the Difference?

Gross profit and net profit are related, but they are not the same thing.

Gross profit generally measures the money remaining after subtracting the direct costs associated with producing the work.

For a contractor, that might include direct labor, materials, equipment and subcontractors.

Net profit accounts for the broader expenses required to operate the entire business.

Those expenses may include:

• Office and administrative salaries
• Rent
• Advertising and marketing
• Business software
• Accounting
• General business insurance
• Office expenses
• Professional services
• Other company overhead

This calculator is primarily designed to analyze job-level gross profit and gross margin.

A profitable job still needs to contribute enough gross profit to cover company overhead before the business ultimately produces net profit.

That distinction is important.

Gross profit tells you what the job produced. Net profit tells you what the business ultimately kept.

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How to Calculate Gross Profit on a Contracting Job

The basic calculation is straightforward:

Gross Profit = Selling Price − Direct Job Costs

Suppose you complete a project with the following numbers:

Selling price: $20,000

Materials: $5,500

Direct labor: $3,500

Equipment: $800

Subcontractors: $1,200

Other direct costs: $500

Your total direct job cost would be:

$11,500

Your gross profit would therefore be:

$20,000 − $11,500 = $8,500

But knowing that you made $8,500 of gross profit is only part of the story.

You also need to know how that profit relates to the selling price.

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What Is Gross Profit Margin?

Gross profit margin expresses your gross profit as a percentage of your selling price.

The formula is:

Gross Margin = Gross Profit ÷ Selling Price × 100

Using the previous example:

Selling price = $20,000

Gross profit = $8,500

The gross margin would be:

$8,500 ÷ $20,000 × 100 = 42.5%

That means 42.5% of the project’s selling price remained after the direct job costs included in the calculation.

Gross margin makes it easier to compare jobs of different sizes.

A $5,000 job and a $50,000 job obviously produce very different dollar amounts, but their gross margins can tell you how efficiently each project converted revenue into gross profit.

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Markup vs. Margin: They Are Not the Same Thing

This is one of the most important pricing distinctions for contractors to understand.

Markup and margin are not interchangeable.

Markup measures profit relative to cost.

Margin measures profit relative to selling price.

Suppose a job costs you $10,000 and you add a 50% markup.

Your selling price becomes:

$10,000 + $5,000 = $15,000

Your markup is 50%.

But your gross margin is:

$5,000 ÷ $15,000 = 33.3%

So:

50% markup ≠ 50% margin

This distinction matters when contractors establish pricing targets.

If you want a particular gross margin, simply adding that same percentage to your costs as markup will not produce that margin.

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How to Calculate Markup

Markup compares gross profit with the cost of producing the job.

The formula is:

Markup = Gross Profit ÷ Total Direct Job Cost × 100

Using a job that costs $10,000 and sells for $15,000:

Gross profit = $5,000

Total direct job cost = $10,000

Markup:

$5,000 ÷ $10,000 × 100 = 50%

Gross margin:

$5,000 ÷ $15,000 × 100 = 33.3%

Both numbers describe the same job from different perspectives.

For estimating and pricing, understanding both can prevent costly mistakes.

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Why Profit Per Crew-Day Matters

Gross margin tells you how profitable a job was relative to its selling price.

But contractors also have another limited resource:

Time.

Suppose two projects each generate $8,000 in gross profit.

The first requires a crew for four working days.

The second requires that same crew for eight working days.

Although the gross profit is identical, the first project produced twice as much gross profit per crew-day.

The calculation is:

Gross Profit Per Crew-Day = Gross Profit ÷ Crew-Days

In this example:

Job A:

$8,000 ÷ 4 days = $2,000 gross profit per crew-day

Job B:

$8,000 ÷ 8 days = $1,000 gross profit per crew-day

That information can help contractors compare different types of projects and understand how effectively their limited production capacity is being used.

A profitable job can still be a poor use of crew capacity if it takes too long to produce that profit.

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What Costs Should Contractors Include in Job Cost?

Your numbers are only as useful as the costs you enter.

Whenever possible, use the actual direct costs associated with completing the project.

Direct labor

Include the labor cost associated with employees who performed the work.

Using true burdened labor cost rather than base hourly wages can provide a more realistic picture of job performance.

Materials

Include materials purchased or consumed specifically for the project.

Depending on the trade, this could include lumber, concrete, pavers, plants, pipe, wire, fixtures, paint, roofing materials or other supplies.

Equipment

Include appropriate job-specific equipment expenses.

This may include equipment rentals or an internal equipment cost your company assigns to projects.

Subcontractors

Include payments to subcontractors hired specifically to complete portions of the project.

Permits and fees

Include permits, inspections and other costs incurred specifically because of the job when applicable.

Other direct costs

Include other expenses that can reasonably be attributed directly to completing that particular project.

The goal is not to make job costing unnecessarily complicated.

The goal is to capture enough of the real costs to understand what the job actually produced.

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Example: Did This $25,000 Contracting Job Make Enough Money?

Suppose your company sells a project for $25,000.

The final direct costs are:

Materials: $7,000

Direct labor: $5,000

Equipment: $1,000

Subcontractors: $1,500

Permits and other direct costs: $500

Total direct job cost:

$15,000

Gross profit:

$25,000 − $15,000 = $10,000

Gross margin:

$10,000 ÷ $25,000 = 40%

Markup:

$10,000 ÷ $15,000 = 66.7%

Now suppose the crew required 8 working days to complete the project.

Gross profit per crew-day:

$10,000 ÷ 8 = $1,250

Those numbers give you far more information than simply knowing you sold a $25,000 job.

You can now compare the project’s gross margin, markup and gross profit per crew-day against other work your company completes.

That is where job costing becomes useful for future estimating.

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Contractor Job Profit Calculator FAQs

What is a good profit margin for contractors?

There is no single gross profit margin that is appropriate for every contractor. Labor intensity, materials, equipment, subcontracting, overhead, market conditions and trade all affect the margin a business needs. Contractors should determine the margins necessary to cover their own overhead and produce their desired net profit.

What is the difference between markup and margin?

Markup measures profit relative to cost, while margin measures profit relative to selling price. A 50% markup on $10,000 of cost produces a $15,000 selling price and a 33.3% gross margin.

Should labor be included in job cost?

Yes. Direct labor used to complete the project is generally an important component of job cost. Using true burdened labor cost can provide a more realistic picture than using employees’ base wages alone.

Should overhead be included in this calculator?

This calculator is primarily designed to measure job-level gross profit using direct job costs. General company overhead is intentionally treated separately. Your gross profit ultimately needs to be sufficient to cover company overhead and leave an acceptable net profit.

What is gross profit per crew-day?

Gross profit per crew-day measures how much gross profit a project generated for each working day your crew spent completing it. It can help contractors compare jobs that require different amounts of production time.

Why can a high-revenue job still be a bad job?

Revenue alone does not measure profitability. A large project can consume significant labor, materials, equipment and time. If those costs are too high relative to the selling price, a high-revenue project can produce a weak gross margin.

Can this calculator be used by different types of contractors?

Yes. The calculator is intended for construction, landscaping, hardscaping, concrete, electrical, plumbing, HVAC, roofing, painting, remodeling and other contracting and field-service businesses.