Gross Margin: The Number Every Business Owner Should Know

Revenue is exciting. Profit is important. But gross margin is where the real story lives.

If you run a construction, trades, professional services, or other project-based business, gross margin is one of the most useful numbers on your financial statements.

And yet, many business owners don't look at it regularly.

Let's change that.

What is gross margin?

Gross margin tells you how much money is left from your revenue after paying the direct costs associated with producing that revenue.

The basic calculation is:

Gross Profit ÷ Revenue = Gross Margin

For example:

• Revenue: $500,000
• Direct costs: $325,000
• Gross profit: $175,000

Your gross margin is:

$175,000 ÷ $500,000 = 35%

That means you kept 35 cents of every revenue dollar after your direct costs.

That remaining amount is what you have available to cover your overhead and ultimately generate net profit.

Gross margin isn't the same as net profit

This is an important distinction.

Gross margin looks at the profitability of your core work.

Net profit looks at what remains after all of your expenses.

For example, your company might have a 35% gross margin but only a 7% net profit after paying:

• office expenses
• insurance
• vehicles
• accounting
• software
• rent
• financing costs
• administration
• marketing
• other overhead

This is why gross margin is so useful.

It helps you separate how profitable your work is from how expensive it is to run your business.

What belongs in gross margin?

This depends on the type of business and how you structure your financial statements.

For a contractor, direct costs might include:

• materials
• subcontractors
• project-specific equipment
• direct labour
• dump or disposal fees
• other costs directly associated with completing a job

For a professional services business, direct costs might look very different.

The important thing is consistency.

Your financial statements should be structured in a way that helps you understand how your business actually makes money.

Why contractors should pay attention to gross margin

Imagine you completed 20 jobs this year.

Your total revenue looks great.

But what if 5 of those jobs were significantly less profitable than the others?

Your overall revenue doesn't tell you that.

Job costing and gross margin analysis can.

You might discover that:

• one type of project consistently produces better margins
• certain customers are less profitable
• labour is taking longer than estimated
• material costs are creeping up
• a particular service is underpriced
• change orders aren't being captured
• overhead is increasing faster than revenue

Those are business decisions—not just bookkeeping observations.

Gross margin can help you price better

One of the biggest advantages of tracking gross margin is that it gives you historical information you can use when pricing future work.

Instead of asking:

"What did we charge last time?"

you can start asking:

"What margin did we actually make last time?"

Those are very different questions.

If a project looked profitable when you quoted it but finished with a much lower margin, that's valuable information.

You can adjust your pricing, labour assumptions, material allowances, or project management processes before repeating the same mistake.

Watch the trend—not just the number

There isn't one magic gross margin percentage that every business should have.

A construction company, engineering firm, landscaper, and consultant will all have different cost structures.

That's why your own historical numbers are often more useful than comparing yourself to a random industry benchmark.

If your gross margin has been:

42% → 39% → 35% → 31%

that's a trend worth investigating.

Your revenue might still be growing.

But your profitability per dollar of revenue is declining.

The takeaway

Gross margin answers a simple but powerful question:

"How much are we actually making from the work we're doing?"

If you're only looking at revenue and bottom-line profit, you may be missing the story in between.

Start watching your gross margin.

Then start asking why it moves.

That's where your financial statements become more than reports—they become a management tool.