How do you calculate profit margin?

Divide profit by revenue, then multiply by 100. Profit is revenue minus all of your costs, so a business with $200,000 of revenue and $150,000 of total costs has $50,000 of profit and a 25% margin.

What is the formula for calculating profit margin?

Net profit margin is (revenue minus total costs) divided by revenue, multiplied by 100. Gross profit margin uses only cost of goods sold in place of total costs. Gross margin is always the higher of the two because it ignores operating costs, so always check which one a figure refers to before comparing it to anything.

What is 30% margin on $100?

Thirty dollars. At a 30% margin, $100 of revenue leaves $30 of profit and $70 of cost. This is not the same as a 30% markup: a markup of 30% means $100 of cost is sold for $130, which works out as a margin of 23%.

Is a 40% profit margin high?

As a net margin, yes, it is unusually high. The average net margin across the US market is 9.74%, and software, the highest-margin sector, averages 25.49%. As a gross margin, 40% is ordinary: software averages 71.72% gross, retail 33.18% and restaurants 32.24%. So the answer depends entirely on which of the two margins you mean. Figures are from NYU Stern's margins by sector dataset, updated January 2026.

How much profit do you actually keep?

Profit Margin Calculator

Calculate how much profit you make against per dollar of sales you make

What is profit margin?

Profit margin indicates the fractional share of earnings remaining in the business after considering expenses. Revenue indicates the monetary amount of business activity that has occurred. Margin indicates how much was retained after expenses.

The formula is straightforward:

Profit Margin = (Revenue − Total Costs) ÷ Revenue × 100

Total costs include what it costs to make or deliver your product, your operating expenses, marketing, and any other outgoings.

For example, a food truck has a gross revenue of $20,000 per month, leaving $3,000 after deducting ingredient expense, employee wages, fuel costs, and permit fees.

Thus, this food truck has a net profit margin of 15%, which means that 85% of its gross revenues have been used to operate the business. Profit margins are significant indicators of business effectiveness rather than business activity alone.

How to calculate your profit margin using this calculator?

The calculator needs a few numbers from you. Each number is a part of the money that comes in and goes out of your business.

1. Revenue

Enter your revenue, the money a business earns from sales before any costs are deducted. Use the same time period for all inputs. If revenue is yearly, costs must also be yearly. Mixing yearly revenue with monthly costs will give incorrect results.

2. Cost of Goods Sold

This is what it costs you to make or deliver something to sell. For example, this includes things like the materials you need, packaging, and the money you pay workers who help make the product.

If you have a food truck, this includes the ingredients you buy and the money you pay to the cook. You should also include the fees charged for processing payments and the commissions you pay to delivery companies.

3. Operating expenses

These are all the costs you need to pay to keep your business running. Rent, insurance, software subscriptions, and your own salary if you pay yourself one.

These costs stay roughly the same whether you have a good month or a slow one, which is exactly why they matter so much to your margin.

4. Marketing expenses

Ads, agency fees, content, sponsorships. Keep this separate so you can see what you’re spending to acquire customers relative to the margin it produces. If your margin is thin and marketing costs are high, that’s usually the first place to audit.

5. Other expenses

Anything that doesn’t fit the above. Administrative costs, professional fees, interest/taxes, miscellaneous overheads. When in doubt, include it here rather than leave it out.

Once you enter all, the calculator shows your total cost, profit in dollars, and profit margin as a percentage. That percentage tells you how efficiently your business turns revenue into profit.

Here’s a quick way to read that result:

Above 20%: Strong. Your business keeps a healthy share of what it earns.
10% to 20%: Solid. Most stable small businesses fall in this range.
5% to 10%: Tight but manageable. Worth watching your costs closely.
Below 5%: Thin. One bad month or a cost increase can push you into the red.

If your margin isn’t where you want it, the next section covers the most practical ways to improve it.

How to improve your profit margin?

Profit margin improves in two ways: earn more without increasing costs, or reduce costs without losing revenue.

Review pricing. Many businesses charge less than they should. Even a small increase can improve profit more than cutting costs. Check if prices reflect the value offered.
Cut low-margin products or clients. Some sales add revenue but very little profit. Identify them and decide if they are worth keeping.
Reduce COGS. For products, negotiate supplier prices or reduce waste. For services, check where time is being lost and fix it.
Spread fixed costs. Rent, salaries, and software stay the same. More sales with the same costs improve the margin.
Track margin regularly. Check monthly or quarterly. This helps catch problems early instead of finding them at year-end.

Frequently asked questions

How do you calculate profit margin?: Divide profit by revenue, then multiply by 100. Profit is revenue minus all of your costs, so a business with $200,000 of revenue and $150,000 of total costs has $50,000 of profit and a 25% margin.
What is the formula for calculating profit margin?: Net profit margin is (revenue minus total costs) divided by revenue, multiplied by 100. Gross profit margin uses only cost of goods sold in place of total costs. Gross margin is always the higher of the two because it ignores operating costs, so always check which one a figure refers to before comparing it to anything.
What is 30% margin on $100?: Thirty dollars. At a 30% margin, $100 of revenue leaves $30 of profit and $70 of cost. This is not the same as a 30% markup: a markup of 30% means $100 of cost is sold for $130, which works out as a margin of 23%.
Is a 40% profit margin high?: As a net margin, yes, it is unusually high. The average net margin across the US market is 9.74%, and software, the highest-margin sector, averages 25.49%. As a gross margin, 40% is ordinary: software averages 71.72% gross, retail 33.18% and restaurants 32.24%. So the answer depends entirely on which of the two margins you mean. Figures are from NYU Stern's margins by sector dataset, updated January 2026.