Gross Margin vs Net Margin for Small Businesses

Gross margin shows what is left after the direct cost of what you sell. Net margin shows what is left after everything. Here are the formulas, a worked example, and how to use both.

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5 min read

Published On

Nov 5, 2026

Read: 5 minutes

Last updated: November 6, 2026

In this guide

What gross margin and net margin each measure
The formulas, with a worked example
What each number tells you
How to improve both
Why margin is not the same as cash

Two Margins, Two Questions

Margin is the share of each sale that you keep. Gross margin and net margin both measure it, but at different points.

Gross margin asks: after paying for what I sold, how much is left? Net margin asks: after paying for everything, how much is left?

You need both. One tells you if your product or service earns its keep. The other tells you if the whole business does.

The Formulas

Gross margin = (revenue − cost of goods sold) ÷ revenue

Net margin = net profit ÷ revenue

Cost of goods sold is the direct cost of what you sell. For a shop, that is the stock. For a bakery, it is flour, butter and packaging. For a service business, it is often the wages of the people who deliver the work.

Net profit is revenue minus every cost: the direct costs, plus rent, wages, software, insurance, interest and taxes.

A Worked Example

Say a business has $200,000 in revenue over a year. The direct cost of what it sold was $120,000. Its other costs added up to $70,000.

Gross margin

Gross profit: $200,000 − $120,000 = $80,000
Gross margin: $80,000 ÷ $200,000 = 40%

Net margin

Net profit: $80,000 − $70,000 = $10,000
Net margin: $10,000 ÷ $200,000 = 5%

The business keeps 40 cents of each dollar after direct costs. After everything else, it keeps 5 cents.

What Each Number Tells You

Gross margin: is each sale worth making?

A low gross margin means the product or service costs too much to deliver, or is priced too low. No amount of cost cutting elsewhere will fully fix that.

Gross margin is also the number to watch when your suppliers raise their prices. If your costs rise and your prices do not, it falls first.

Net margin: is the business worth running?

A healthy gross margin can still hide a thin net margin. In the example above, the 5% net margin shows that overhead takes most of the 40% gross margin.

Net margin is the bottom line. It shows whether the business as a whole is earning more than it spends.

Reading them together

| Gross margin | Net margin | What it usually means | | --- | --- | --- | | Strong | Strong | The business is working | | Strong | Weak | Overhead is too high for the sales you make | | Weak | Weak | Pricing or direct costs need attention first |

There is no single good number. Margins differ a lot between industries, so compare yourself with your own past results first.

The Slate View

Margin is a shock absorber. Slate's question is not how much you keep today. It is how much can go wrong before you stop keeping anything.

In the example above, one point of gross margin is worth $2,000, which is 20% of the whole profit. If overhead stays fixed, a 12.5% fall in sales takes profit to zero. A supplier increase or a slow quarter that sounds small is not small at a 5% net margin. Work out your own two numbers, and you will know how much room you really have.

Common Mistakes

Putting costs in the wrong place. If delivery wages sit in overhead, your gross margin looks better than it is. Choose a rule and stick to it.
Mixing up margin and markup. Markup is profit as a share of cost. Margin is profit as a share of revenue. A 50% markup is a 33% margin.
Looking at one month. Seasonal swings and one-off bills distort a single month. Track a quarter or a year.
Ignoring your own pay. If you take no wage, your net margin looks better than it would for a business that pays someone to do your job.

How to Improve Each Margin

To raise gross margin

Raise prices. Even a small increase moves the number, especially if customers value your service.
Renegotiate with suppliers. Ask for better terms on the items you buy most.
Cut waste. Spoiled stock, rework and unbilled time are direct costs with no revenue behind them.
Sell more of what earns the most. Know which products and jobs carry your best margins.

To raise net margin

Do everything above. A better gross margin carries straight through.
Review overhead line by line. Look for unused subscriptions, and services you pay for but rarely use.
Grow sales without growing fixed costs. If rent and software stay the same, extra revenue lifts net margin.

Margin Is Not Cash

A business can have a good net margin and still be short of cash. Customers may pay late. Stock may be bought months before it sells. Payroll falls due on a set day whether or not invoices have been paid.

Margin tells you if the business earns a profit over time. Cash tells you if you can pay your bills this week. To track the second, see how to calculate cash runway and how to build a 13-week cash flow forecast.

Keep Your Margins in View

Margins are easy to work out once and forget. They are more useful when you check them every month. Slate Signals works in Claude and ChatGPT and shows you how those numbers are moving.