Gross Margin Versus Net Margin

Part B: Understand the Money

Say you run a contracting company and business is great. Every job is booked, the trucks are full, the phone keeps ringing. Now answer one question: after you pay for the materials and the crew on a job, how much of the price is left? We see many owners in that spot who cannot say. They know what they charge and they know what is in the bank on a good day, and everything between those two numbers is a fog.

That fog has a name, and it splits into two pieces that people treat as one. Gross margin and net margin both describe what you keep, but they look at different layers of your business. Mix them up and you will either underprice your work or blame the wrong costs when money feels tight.

Gross margin: does the work pay for itself?

Gross margin looks only at the costs that exist because you did the job, which accountants call the cost of goods sold, or COGS. For a contractor, that is materials and the labor of the people doing the work. For a restaurant, gross margin usually means what is left after food cost, and labor is often shown on its own line, so ask your accountant how your statements treat it. For a consultant, it is the hours you spend delivering. Take the price, subtract those direct costs, and what is left is your gross profit. Divide that by the price and you have gross margin, shown as a percentage.

Here is a labelled hypothetical. Say a job is priced at $10,000. Materials and crew cost $6,000. Your gross profit is $4,000, and your gross margin is 40%, because $4,000 divided by $10,000 is 0.40. That $4,000 is the money each job contributes toward everything else the business has to carry.

Notice what gross margin is really asking. Is this job, this product, this service worth doing at this price? It is a question about the work itself, not about your rent or your advertising.

Net margin: does the whole business pay for itself?

Net margin steps back and includes everything else: rent, insurance, software, advertising, vehicles, office help, the phone bill. Those costs show up whether you do one job this month or ten. Take your gross profit, subtract all of that, and what remains is net profit. Divide by your total sales and you have net margin.

Stay with the hypothetical. Say in one month you bring in $40,000 in sales. Direct costs come to $24,000, so gross profit is $16,000 and gross margin is 40%. Then overhead, meaning rent, insurance, software, advertising and admin, adds up to $11,000. Net profit is $5,000. Divided by $40,000, your net margin is 12.5%.

Same month, two very different numbers: 40% and 12.5%. Neither is wrong. One tells you the work is healthy, the other tells you how much the business actually keeps. If you only ever look at the first, you feel rich. If you only ever look at the second, you cannot tell whether the problem is your prices or your overhead.

Why the difference changes your decisions

Small changes in price hit gross margin hard, because your direct costs do not shrink when you discount. Take the same $10,000 job with $6,000 of direct costs and offer a $1,000 discount to win it. The price is now $9,000, gross profit falls from $4,000 to $3,000, and margin drops to about 33%. A discount that looks like 10% off the price just took 25% of your gross profit, and the overhead did not get any cheaper.

Now think about the other direction. If your gross margin is fine but your net margin is thin, look at the layer underneath: overhead that grew quietly, advertising that is not producing customers, a lease you outgrew. If your gross margin is thin, no amount of trimming overhead will save you, because the problem sits in how you price and deliver the work. Which layer is your problem? We see owners guess, and guessing is expensive.

This is also why price and cost need to be looked at together. Your Resources page has a free Pricing Calculator that lets you work backward from the pay you need and your costs to a price, rather than starting with what the competitor charges. To see how your costs behave as you grow, read Fixed, Variable and Semi-Variable Expenses.

Margin also does not equal cash. A job can carry a healthy margin and still leave you short in the month you pay for it, which is the subject of Building a 12-Month Cash-Flow Forecast.

Pick your last three completed jobs, or last month if you sell products. For each one, write down the price and only the direct costs: materials, and the labor of whoever did the work, including your own time at a fair hourly value. Subtract to get gross profit, then divide by the price to get gross margin. Then take last month as a whole, subtract your overhead, and calculate net margin. Put the two percentages side by side. If the three jobs come out very different from each other, you have just learned something about which work to chase and which to price higher.

Give it about one to two hours the first time, mostly spent digging up what each job really cost, and expect the higher end if your records are messy. It is free with a pen and paper, a spreadsheet or the Pricing Calculator. After the first pass it takes about 15 minutes a month, and the next time a customer asks for a discount you will know what it does to the profit on that job.