Net margin
Net margin is the percentage of revenue left as profit after every cost the business pays: cost of goods, variable order costs, marketing, and fixed overheads such as team, rent and software. Calculated as net profit divided by revenue, ecommerce operators use it to judge whether the whole business model works.
| Variable | What it covers |
|---|---|
| Net profit | What is left after every cost - product, variable order costs, marketing and fixed overheads - on the accounting basis you report (before or after interest and tax; say which). |
| Revenue | Net revenue - gross sales minus discounts, returns and refunds. |
Net margin is the bottom of the ladder that starts at gross margin and passes through contribution margin. Each level answers a different question; net margin answers the last one.
Worked example
Example numbers. A 58.0% gross margin becomes 25.0% contribution and 6.0% net once every cost is paid - each step is a different decision, which is why each has its own entry.
What is a good net margin?
It depends on more than any benchmark can hold: the margin structure upstream of it, how hard you are reinvesting in acquisition (a growth-heavy month books the cost now and the payback later), the size of your fixed cost base, whether founders pay themselves a market salary, and the accounting basis in use.
For scale rather than a target: Finaloop’s aggregated dataset of hundreds of 7-8 figure US brands (2023-2025) put median EBITDA near 5% - EBITDA being a close, slightly flattered cousin of net margin. Build your own view with the free Shopify P&L template rather than borrowing someone else’s number.
Net margin vs related metrics
| Metric | What comes out of revenue | The question it answers |
|---|---|---|
| Gross margin | COGS only. | Can the product carry its cost? |
| Contribution margin | Every variable cost. | Does the next order make money? |
| Fixed costs | Not a margin - the block of cost separating contribution from net. | What does it cost to exist, before you sell anything? |
| P&L statement | Not a metric - the document the whole walk lives in. | Where did the dollars actually go? |
Common mistakes
- Judging campaigns or SKUs on net margin. Fixed costs do not move with an order; per-order decisions belong to contribution margin.
- Not paying yourself. A net margin that only exists because founder hours are free is not a margin, it is a subsidy.
- Reading net margin as cash. Inventory bought this month is cash out but not yet COGS - a profitable month can still drain the bank. See the cash conversion cycle.
- Mixing accounting bases. Swapping between cash and accrual month to month makes the trend meaningless.
- Panicking at one growth-heavy month. Front-loaded acquisition depresses this month’s net margin while the cohort pays back over the following ones - judge the cohort, not the calendar month.
Net margin FAQ
Related
Blufire S2 Unit Economics shows the layer beneath net margin - true contribution on every order, customer and SKU in the Profitability Cube and the CM waterfall & bridge. The Math teaches the full step-down free.
Updated July 2026