If you run a business, revenue (the total money you bring in) is only half the story. To understand if your business is actually successful, you need to know how much of that revenue you get to keep. That is your profit margin.
Disclaimer: This guide provides educational information on fundamental business calculations. It is not financial or accounting advice.
What is a Profit Margin?
A profit margin is a ratio that measures profitability. It represents the percentage of sales that has turned into profits.
For example, if your business has a 10% profit margin, it means you keep $0.10 in profit for every $1.00 you make in sales. The other $0.90 goes toward the costs of running the business.
However, "profit margin" is a broad term. In business accounting, there are three distinct levels of profit margin you must track:
1. Gross Profit Margin
Gross profit margin only looks at the direct costs associated with producing your product or delivering your service. This is known as the Cost of Goods Sold (COGS). It does not include rent, marketing, or admin salaries.
Gross Margin Example
- You sell a custom t-shirt for $20 (Revenue).
- The blank shirt and ink cost you $5 (COGS).
- Your Gross Profit is $15 ($20 - $5).
Gross Margin = ($15 ÷ $20) × 100 = 75%
A high gross margin is crucial because it means you have plenty of money left over to pay your other operating expenses.
2. Operating Profit Margin
Your operating margin takes the gross profit from the previous step and subtracts all of your day-to-day operating expenses (OPEX). This includes rent, utilities, software subscriptions, marketing, and the salaries of staff not directly involved in production.
Operating margin shows how well your business is managed on a daily basis. If your gross margin is high but your operating margin is low, it means you are spending too much money on overhead and administration.
3. Net Profit Margin
This is the "bottom line." Net profit margin takes the operating profit and subtracts everything else, including taxes, interest payments on loans, and any one-time expenses.
Net margin tells you the final, absolute profitability of your business. When investors or banks ask what your "profit margin" is, they are almost always asking for your net profit margin.
The Bottom Line Math
If your company makes $1,000,000 in total revenue for the year, and after paying for materials, rent, salaries, marketing, interest, and taxes, you have $100,000 left in the bank:
Net Profit Margin = ($100,000 ÷ $1,000,000) × 100 = 10%
To easily calculate these figures for your own business or products, use our Profit Margin Calculator.