Revenue tells you how much money came in. Margin tells you how much of it you actually keep, and at which stage of the business it disappears. This calculator builds a small income statement from your own numbers, revenue down through cost of goods sold, operating expenses, depreciation and amortization, interest, and tax, and reports four different margin percentages, because a business rarely has just one profitability problem.
Four Margins, One Set of Numbers
Using this calculator's default example, $100,000 revenue, $60,000 COGS, $15,000 operating expenses, $2,000 interest expense, $3,000 depreciation, $1,000 amortization, and a 21% tax rate, the four margins tell four different parts of the same story:
- Gross margin — 40%. $100,000 − $60,000 COGS = $40,000 gross profit. This is pure production or service efficiency, before a single overhead dollar is spent.
- Operating margin — 25%. $40,000 gross profit − $15,000 OPEX = $25,000 EBIT. This is what's left after running the actual business, independent of financing or tax.
- EBITDA margin — 29%. $25,000 EBIT + $3,000 depreciation + $1,000 amortization = $29,000. Adding back non-cash charges approximates operating cash flow, which is why it's the number most acquisition and valuation multiples are built on.
- Net margin — 18.17%. $25,000 EBIT − $2,000 interest = $23,000 pre-tax profit; after 21% tax, $18,170 net profit. This is the only margin that reflects your actual capital structure and tax situation, and it's the one that ultimately belongs to the owners.
A business can look excellent on one of these and mediocre on another, a 40% gross margin with an 18% net margin is not a contradiction, it just means overhead, financing, and tax are taking a real bite between the top and bottom lines.
Margin vs. Markup: The Mix-Up That Costs Real Money
Margin and markup both compare gross profit to a number, but not the same number. Margin divides gross profit by revenue; markup divides it by cost. On $60,000 of cost and $40,000 of gross profit, that's a 40% margin but a 66.7% markup, the same dollars, two very different-looking percentages.
This gap matters most when pricing: if you decide to "make 40% profit" and add a 40% markup on cost, you'll actually land on a 28.6% margin, not 40%, because markup and margin only converge at 0%. If your business prices by adding a percentage on top of cost rather than working backward from a target revenue split, use the Markup vs. Margin Calculator to convert between the two before you set prices, this calculator assumes you already have finished revenue and cost figures, not a markup rate you're still solving for.
One Product's Margin vs. the Whole Company's Net Income Margin
This tool is built for analyzing a specific slice of the business, a product line, a business unit, or a defined period, where you assemble revenue, COGS, OPEX, D&A, interest, and tax yourself to see how each layer performs. That's different from asking what your entire company's net income margin is off a complete, already-consolidated income statement covering every revenue stream and cost center at once.
If you already have a finished net income figure and total revenue for the whole business, straight from your financial statements, with nothing left to build up, the Net Income Margin Calculator is the more direct tool. Use this calculator when you want to see how a specific product's margin is built layer by layer; use that one when you just need the company-wide bottom-line ratio.
Margin Questions Worth Getting Right
What counts as a good profit margin?
It depends entirely on the industry. A 5% net margin is strong for grocery retail but weak for software, where 15-25% is typical. Compare against businesses in the same industry rather than a single universal benchmark.
Why do investors focus on EBITDA margin instead of net margin?
EBITDA margin strips out financing choices and non-cash charges, making it easier to compare businesses with different debt loads and asset bases, and it's the basis for common valuation multiples, so acquirers tend to anchor on it before net margin.
Can a business survive with a negative profit margin?
Yes, temporarily, with outside funding to cover the gap. Growth-stage companies often run negative net margins for years, betting that margins improve at scale, sustainable only with a credible path to eventual profitability.
How much does a small price increase actually change my margin?
More than expected, because price increases flow straight to gross profit while COGS stays fixed. A 5% price increase on a $100 item with $60 cost lifts gross profit by 11.25%, which is why pricing is often the highest-leverage lever for improving margin.
Disclaimer: This calculator and the content above are for educational and informational purposes only and do not constitute financial, accounting, or business advice. Results depend entirely on the accuracy of the inputs provided. Consult a qualified accountant or financial advisor for decisions affecting your business finances.