The Short Answer
Profit margin is a percentage that shows how much of every dollar in sales a business keeps as profit after expenses. A higher margin means more of each sales dollar turns into profit; a lower margin means more of it gets absorbed by costs. Margins are usually shown as “gross” (after just the cost of the product) or “net” (after every expense the business has).
In short, profit margin turns raw profit dollars into a percentage that’s easy to compare across time periods, products, or competitors.
How Profit Margin Is Calculated
- Gross profit margin = (Revenue − Cost of Goods Sold) ÷ Revenue. Shows how efficiently the core product or service is produced or delivered.
- Net profit margin = Net Income ÷ Revenue, where net income is what’s left after cost of goods sold, overhead, interest, and taxes are all subtracted.
- Both are expressed as a percentage, making it easy to compare a small business to a large one regardless of size.
Gross Margin vs. Net Margin
- Gross margin — revenue minus only the direct cost of the product or service. Reflects production and pricing efficiency.
- Net margin — revenue minus every cost the business has, including overhead, interest, and taxes. Reflects true bottom-line profitability.
A Simple Example
Example: A shop brings in $50,000 in sales and spends $20,000 on inventory, leaving $30,000 in gross profit — a 60% gross margin ($30,000 ÷ $50,000). After paying $22,000 in rent, wages, and other expenses, the shop’s net income is $8,000, for a 16% net margin ($8,000 ÷ $50,000). The gap between the two numbers shows how much overhead and other costs are absorbing.
Using Profit Margin
- Compare margins within the same industry, since “normal” margins vary hugely — grocery stores often run thin margins while software companies can run very high ones.
- Rising revenue with a shrinking margin can be a warning sign that costs are growing faster than sales.
- Track margin over time, not just in a single month, to see whether profitability is trending up or down.
- Small margin improvements can mean large profit gains once a business reaches meaningful sales volume.
The Bottom Line
Profit margin translates raw profit into a percentage that shows how efficiently a business turns sales into money it actually keeps. Gross margin isolates how well the core product is priced and produced, while net margin reveals what’s really left after every bill is paid — and tracking both together gives a clearer picture than either one alone.
Frequently Asked Questions
What is a profit margin in simple terms?
It’s the percentage of each sales dollar a business keeps as profit after subtracting costs, either just the cost of the product (gross margin) or all costs (net margin).
What’s considered a good profit margin?
It depends heavily on the industry. A 10% net margin is solid in many retail businesses, while service or software businesses often run much higher. Comparing against similar businesses is more useful than a single universal number.
Why is my gross margin high but net margin low?
That gap usually points to high overhead, interest, or tax costs eating into an otherwise efficient product margin — worth reviewing operating expenses rather than the pricing of the product itself.
Can a profit margin be negative?
Yes. A negative margin means the business is losing money overall — expenses exceeded revenue for that period.
Is a higher profit margin always better?
Usually, but not automatically — an unusually high margin compared to competitors can also mean prices are set high enough to limit sales volume or invite new competition.
How is profit margin different from markup?
Markup compares profit to cost (profit ÷ cost), while margin compares profit to the selling price (profit ÷ revenue). The two numbers look similar but are calculated differently and shouldn’t be used interchangeably.
This article is for educational purposes only and is not financial, accounting, tax, or legal advice for your business. Rules, methods, and best practices vary by industry, business size, and location. Consult a qualified accountant or financial professional for guidance specific to your business.