How to Calculate Profit Margin: Formulas & Examples

How to Calculate Profit Margin: Formulas & Examples

Profit margin tells you how much of your revenue actually becomes profit after covering costs. It's one of the simplest and most important numbers in business. If you price projects without checking your margin, it's easy to take on work that looks profitable but barely covers expenses.

Understanding how to calculate profit margin helps you price jobs properly, compare projects, and make sure your business is earning enough to grow.

What Is Profit Margin?

Profit margin is the percentage of revenue that remains after all costs are deducted. It shows how much money your business keeps from each sale.

For example, if you charge $1,000 for a project and your total costs are $700, the remaining $300 is profit.

Profit margin expresses profit as a percentage of revenue, making it easier to compare the profitability of different projects or services.

Profit Margin Formula

The standard formula is:

Profit Margin = (Revenue − Costs) ÷ Revenue × 100

Where:

• Revenue is the amount you charge the client
• Costs include materials, labor, subcontractors, and other project expenses

Profit Margin Example

Example project:

Revenue: $5,000

Total project costs: $3,800

Profit:

$5,000 − $3,800 = $1,200

Profit margin:

($1,200 ÷ $5,000) × 100 = 24%

This means 24% of the project price becomes profit.

Costs You Should Include in Your Calculation

To calculate margin correctly, include all costs connected to the job.

Common costs include:

• Labor or hourly time
• Materials and supplies
• Subcontractor fees
• Software or tools used for the project
• Travel and transportation
• Equipment wear and depreciation

Keep in mind that leaving out even small costs can make a project appear more profitable than it really is.

Margin vs Markup (Why People Get This Wrong)

Margin and markup are often confused, but they measure different things.

Markup is how much you add to costs to determine your price.

Margin is the percentage of the final price that becomes profit.

Example:

Cost: $1,000

If you apply a 20% markup, the price becomes:

$1,000 × 1.20 = $1,200

But the margin on that price is actually:

($200 ÷ $1,200) × 100 = 16.7%

Typical Profit Margins by Industry

Target margins vary depending on the type of business.

Common ranges include:

• Consulting and professional services: 40–60%
• Creative services: 30–50%
• Trades and construction: 20–35%
• Product-based services: 15–30%

These ranges are only guidelines. Your margin depends on overhead, competition, and how specialized your work is.

Why Profit Margin Matters Before Sending a Quote

Many businesses calculate margin only after the job is finished. By that point, it is too late to fix pricing mistakes.

Checking the margin before sending a quote helps you:

• Avoid underpricing projects
• Make sure the job is worth taking
• Protect your cash flow
• Maintain consistent profitability

Running the numbers before committing to a price is one of the simplest ways to protect your business.

Profit Margin Checklist

Before finalizing your price, make sure:

☐ All project costs are included

☐ Labor hours are estimated realistically

☐ Materials and subcontractors are accounted for

☐ Travel and incidental costs are included

☐ The final price meets your target margin

Once you know your target profit margin, the next step is turning that pricing into client documents. With Invoicer.ai, you can create professional invoices and estimates in minutes and keep your prices, totals, and project details organized from the start.