How to Calculate Profit Margin (Formula + Examples)

The profit margin formula

Every profit margin uses the same formula. Only the definition of "profit" changes.

Revenue is your total sales before any costs come out. Profit is what's left after you subtract a specific set of costs. Multiply by 100 to turn the decimal into a percentage.

That's it. If a freelance designer bills $6,000 in a month and $1,500 of costs come out, the profit is $4,500 and the margin is 4,500 ÷ 6,000 × 100 = 75%. The only real decision is which costs you subtract — and that's what separates gross, operating, and net margin.

The three types of profit margin

The three margins are layers. Each one subtracts more costs than the last, so each is smaller than the one above it. Reading all three tells you *where* your money goes.

Gross margin

Gross margin subtracts only the direct cost of what you sold — the materials, wholesale cost, or direct labor that goes into each unit. This is your cost of goods sold, or COGS.

Gross margin = (Revenue − COGS) ÷ Revenue × 100

A candle maker sells a candle for $28. The wax, wick, jar, and label cost $9.80. Gross profit is $18.20, so gross margin is 18.20 ÷ 28 × 100 = 65%. Gross margin tells you whether the product itself makes money before the overhead of running the business.

Operating margin

Operating margin subtracts COGS and your operating expenses — rent, utilities, software subscriptions, marketing, and staff wages. These are the costs of keeping the doors open, whether or not you make a sale.

Operating margin = (Revenue − COGS − Operating expenses) ÷ Revenue × 100

This is the number that tells you if the business model works, because it counts the overhead that a busy owner often forgets.

Net margin

Net margin subtracts *everything* — COGS, operating expenses, interest on any loans, and taxes. It's the bottom line, the money that's genuinely yours.

Net margin = Net profit ÷ Revenue × 100

For most small business decisions, gross and net margin are the two you'll reach for most: gross to price individual products, net to see what the whole operation leaves you.

How to calculate profit margin, step by step

Here's the process for any margin type:

1. Pick which margin you want. Gross for a single product, net for the whole business. Be clear before you start, or you'll compare numbers that don't mean the same thing.
2. Add up your revenue. Total sales for the product, order, or period you're measuring — before any costs.
3. Add up the matching costs. For gross margin, only direct costs (COGS). For net margin, every cost including tax. The costs must match the margin you chose in step 1.
4. Subtract costs from revenue to get profit. Revenue minus costs equals the profit figure.
5. Divide profit by revenue, then multiply by 100. That's your margin as a percentage.

The Profit Margin Calculator does steps 4 and 5 instantly — enter revenue and cost and it returns the margin, the markup, and the profit in one view. But do it by hand once or twice; understanding the mechanic is what lets you spot when a number looks wrong.

Worked example: a small bakery

A bakery wants to know the margin on its signature sourdough loaf, and on the business overall for the month.

Per-loaf gross margin. The loaf sells for $9. Flour, water, salt, and the energy to bake it come to $2.70 in direct costs.

• Gross profit = $9 − $2.70 = $6.30
• Gross margin = 6.30 ÷ 9 × 100 = 70%

Each loaf is strongly profitable on its own. Good — but that's before rent and wages.

Monthly net margin. Over the month the bakery does $24,000 in revenue. COGS across everything is $8,400. Rent, wages, utilities, and insurance add $11,000. Tax and loan interest come to $1,800.

• Net profit = $24,000 − $8,400 − $11,000 − $1,800 = $2,800
• Net margin = 2,800 ÷ 24,000 × 100 = 11.7%

Notice the gap: a 70% gross margin on the hero product, but under 12% net once the whole operation is counted. That gap is normal, and it's exactly why you track both. A great gross margin can still leave a thin net margin if overhead is heavy — and you can only fix what you can see.

What is a good profit margin?

There's no universal "good" number, and any source that gives you one without asking about your industry is guessing. Margins vary enormously: a software product might net 30%+, a grocery store runs on low single digits and makes it up on volume, and a service business with no inventory can hold gross margins above 60%.

A few honest reference points instead of fake benchmarks:

• Compare yourself to yourself. Is this month's margin better than last quarter's? Trend beats any industry average.
• Service businesses run higher gross margins than product businesses, because they have little or no COGS — your main cost is time.
• Product and retail businesses run thinner because inventory, shipping, and fees eat into every sale, so they need volume.
• Watch the direction. A margin that's shrinking while revenue grows means costs are rising faster than sales — a quiet problem that a revenue-only view completely hides.

If you're setting prices from scratch rather than checking existing ones, the margin you *want* should drive the price. Our guide on how to price a product for retail works backward from a target margin to a shelf price.

Common mistakes when calculating margin

• Confusing margin with markup. They use the same two numbers but a different formula, and they are never equal. A 50% markup is only a 33% margin. This one mistake quietly underprices thousands of small businesses — see markup vs margin for the fix.
• Forgetting your own time is a cost. If you don't pay yourself a real wage in the cost column, your margin is fiction. Price your labor in — the Hourly Rate Calculator shows the rate to use.
• Mixing up which costs go with which margin. Subtracting rent when you meant to calculate *gross* margin gives you a number that's neither gross nor net. Keep the layers clean.
• Measuring only revenue. "We did $30,000 this month" feels great and tells you nothing about whether you kept any of it. Margin is the number that matters.
• Using list price instead of the price actually paid. Discounts, refunds, and platform fees lower real revenue. Calculate on what actually landed in your account.

Checklist

• [ ] Decide which margin you need: gross, operating, or net
• [ ] Total the revenue for the product or period
• [ ] Total only the costs that match that margin
• [ ] Subtract to get profit, divide by revenue, multiply by 100
• [ ] Include your own labor as a cost
• [ ] Compare to your own past margins, not a made-up benchmark

FAQs

Final take

Profit margin is profit divided by revenue times 100 — one formula, three layers depending on which costs you subtract. Track gross margin to price your products and net margin to see what the business truly earns, and never let a big revenue number distract you from a thin margin underneath it. Run your own numbers through the Profit Margin Calculator, then, if you're comparing it to a markup, read markup vs margin so you never confuse the two again.