What is net profit margin?
Of all the margins, net profit margin is the bottom-line one — literally. It's the percentage of every sales dollar that survives all the way down to profit after everything is paid.
Skip the math — the free break even calculator runs this from your own figures.
Open the free calculator →The definition
Net profit margin is your net profit divided by your revenue, expressed as a percentage. If you keep $12 of profit for every $100 of sales, your net profit margin is 12%.
Unlike gross margin, which only subtracts the direct cost of what you sold, net margin subtracts everything — direct costs, overheads, interest, and tax. It's the truest single measure of how profitable the whole business is.
The formula and an example
Net profit margin = (net profit ÷ revenue) × 100. Net profit is what's left after all expenses: cost of goods, operating expenses, interest, and tax.
Example: on $500,000 of revenue, if total costs are $450,000, your net profit is $50,000 and your net margin is 50,000 ÷ 500,000 = 10%. Every sales dollar leaves you ten cents of profit.
Net vs gross vs operating margin
These three margins step down the income statement. Gross margin subtracts only direct costs. Operating margin also subtracts overheads, showing profit from core operations. Net margin subtracts everything left — interest and tax included.
Comparing them is diagnostic: a healthy gross margin but a thin net margin points to heavy overheads, debt, or tax eating your profit. Each margin isolates a different part of the story.
What's a good net margin
It depends heavily on your industry, but as a loose guide many small businesses treat a net margin around 5% as lean, 10% as healthy, and 20%+ as strong. High-overhead or high-volume, low-price models sit lower; lean service businesses can sit much higher.
The most useful comparison is against your own past and against similar businesses — not against a company with a completely different cost structure.
How to improve it
Net margin improves from both ends: raise gross margin (better pricing, lower unit costs, richer product mix) and control the costs below it (overheads, interest, waste). Because net margin is the end of the chain, small gains at each stage compound into it.
Since pricing is usually the fastest lever, the free calculator below prices from a target margin and shows the break-even volume behind it — so a margin goal becomes a concrete price and sales target.
Questions
What's the difference between net profit margin and net profit?
Net profit is a dollar amount — the actual money left after all costs. Net profit margin is that amount as a percentage of revenue. Profit tells you how much you made; margin tells you how efficiently you made it. A business can grow net profit while its margin falls if costs rise faster than sales, so it's worth watching both.
Should the owner's salary be counted before net margin?
If you pay yourself a wage through the business, yes — it's an operating cost and should be included, so net margin reflects true profitability after paying for your role. If instead you take the leftover profit as your income, then net profit effectively is your pay, and the margin represents what the business earns before rewarding you. Be consistent so the number means the same thing over time.