A Simple-Numbers Look at Where Your Revenue Actually Goesa

A store selling $50,000 a month can be thriving or slowly going broke, and the revenue number alone won't tell you which. What tells you is margin: the part of every sale that's actually left after everything required to make that sale happen. For a lot of ecommerce owners, especially in the first two or three years, margin is the number they've never actually sat down and calculated line by line. They know their price. They know roughly what the product cost them. Everything in between (payment processing, platform fees, returns, ad spend, packaging) gets treated as background noise instead of the thing that decides whether the business works.

This piece walks through where the money actually goes on a typical online sale, using real fee structures from the platforms most stores run on, so the arithmetic isn't abstract. It also covers what counts as a reasonable margin by category, the mistakes that quietly erode margin without ever showing up as a single bad decision, and the levers that move margin more than a price increase usually does.

The Three Margins People Mix Up

Ask five ecommerce owners what their margin is and you'll often get three different answers to what sounds like one question. That's because "margin" isn't a single metric. It's a family of them, each answering a slightly different question.

Gross margin is revenue minus the cost of goods sold (COGS), what you paid the manufacturer or supplier per unit, including inbound freight, divided by revenue. It answers: how much room is there between what I paid for the product and what I sold it for, before anything else?

Contribution margin goes further and subtracts the variable costs that scale with each order: payment processing fees, shipping, packaging, and, in a lot of modern definitions, a per-order allocation of advertising spend. It answers: does this specific sale actually generate cash toward covering my fixed costs, or does it lose money the moment it ships?

Net margin is what's left after every cost is accounted for, including fixed overhead like software subscriptions, salaries, rent (if any), and taxes, divided by revenue. It answers the question owners actually care about: what did the business really keep?

The gap between these three numbers is often where the surprise lives. A product can have a healthy 60% gross margin and still lose money on a net basis once ad spend, returns, and overhead are subtracted, which is exactly what trips up a lot of newer direct-to-consumer brands that price based on gross margin alone.

A Worked Example: One $50 Product, Start to Finish

Hypothetical example. The figures below are illustrative, not drawn from any single real company, but the fee rates are current, publicly listed rates from Shopify and Stripe as of September 2026, and the return-rate assumption is based on the National Retail Federation's 2025 estimate for online sales. Actual results for any specific product or store will differ based on category, supplier terms, and operations.

Assume a direct-to-consumer store sells a $50 skincare product through a Shopify store on the Basic plan, using Shopify Payments (so the standard online rate of 2.9% + $0.30 applies), and ships via a standard carrier.

Sale price (revenue): $50.00, 100% of revenue.
Cost of goods sold (manufacturing + inbound freight, assumed 25% of price): –$12.50, running total 75.0%.
Gross margin: $37.50 (75.0%).
Payment processing (2.9% + $0.30): –$1.75, running total 71.5%.
Outbound shipping (assumed, average parcel): –$6.50, running total 58.5%.
Packaging materials (assumed): –$1.20, running total 56.1%.
Contribution margin before ads and returns: $28.05 (56.1%).
Advertising spend allocated per order (assumed $9 customer acquisition cost): –$9.00, running total 38.1%.
Return reserve (19.3% return rate assumption × estimated $18 average cost per return, amortized across all orders): –$3.47, running total 31.1%.
Contribution margin after ads and returns: $15.58 (31.1%).
Fixed overhead allocation (software, a portion of salaries, misc.), assumed $6.50 per order at this store's volume: –$6.50, running total 18.1%.
Net margin: $9.08 (18.1%).

The point of walking through it line by line isn't the specific 18.1% figure (a different product, category, or operating model will land somewhere else entirely), but it's that roughly 82 cents of every dollar this hypothetical store brings in is already spoken for before it counts as profit, and more than a third of that (advertising and returns combined) is variable, meaning it moves with every change in ad costs or product quality. A store that only tracks gross margin (75% in this example) is looking at a number nearly four times more flattering than what it actually keeps.

Where Margin Quietly Disappears

Four categories account for most of the gap between gross and net margin in a typical ecommerce business, and each is worth understanding on its own.

Payment processing and platform fees. Shopify's standard online transaction rate is 2.9% + $0.30 on its Basic plan, dropping to 2.7% + $0.30 on the Grow plan and 2.5% + $0.30 on Advanced, as of Shopify's published pricing. Stripe, commonly used directly or as an underlying processor, lists the same 2.9% + $0.30 as its standard rate for domestic card transactions, with additional surcharges for manually entered or international cards. On a marketplace like Amazon, there's an additional referral fee layered on top of payment processing. Amazon's fee structure charges referral fees that cluster around 15% for many categories (home goods, sporting goods, office products, and others), though the range runs from about 5% for low-priced clothing up to 45% for accessories in certain categories, with a $0.30 minimum fee per item. Selling through a marketplace instead of (or alongside) an owned store is a real trade-off between reach and margin.

Returns. This is the one most owners underestimate until they calculate it properly. The National Retail Federation's 2025 consumer returns research estimated that 19.3% of online sales would be returned, against a considerably lower overall retail return rate of 15.8%, meaning ecommerce specifically carries a heavier returns burden than retail as a whole. Every return typically costs more than just the refunded amount: return shipping (sometimes covered by the merchant), restocking or inspection labor, and in some categories the product simply can't be resold at full price afterward. Categories with high return rates (apparel and footwear especially, where sizing uncertainty drives returns) need to build that cost into pricing from day one rather than discovering it in a quarterly review.

Customer acquisition cost. As paid advertising has gotten more competitive, especially on Meta and Google, the cost to acquire a new customer has become one of the largest single line items for many direct-to-consumer brands, frequently rivaling or exceeding the cost of the product itself. This is a variable cost that scales with growth ambitions: the more a business wants to grow through paid channels, the more it typically pays per new customer, at least until it saturates its best-performing audiences.

Shipping and fulfillment. Outbound shipping costs have generally trended upward, and many stores absorb some or all of that cost as "free shipping" to stay competitive, which simply moves the cost from a line item the customer sees to one buried in the product's effective margin.

What Counts As a Good Ecommerce Margin

There's no single number that applies across categories, and any source claiming otherwise is oversimplifying. Directionally, though, a few patterns hold up across multiple industry sources tracking ecommerce financials (treat the specific percentages below as general industry reference points rather than precise benchmarks, since no single authoritative dataset publishes definitive figures by category).

General consumer goods / commodity products: typically 20–40% gross margin, 2–5% net margin.
Branded DTC (apparel, beauty, home): typically 50–70% gross margin, 5–15% net margin.
Digital or print-on-demand products: typically 60–85% gross margin, 10–25% net margin.
Handmade / low-volume niche goods: typically 60–80% gross margin, 15–30% net margin.

Two things explain most of the spread. First, categories with heavy price competition (electronics, commodity household goods) tend to have thin margins at every level because customers can easily compare prices across sellers. Second, categories with high perceived differentiation (where the brand, not just the product, is part of what's being sold) can support gross margins high enough to absorb a bigger marketing and returns burden and still land with a respectable net margin.

A single-digit net margin isn't automatically a red flag. Plenty of large, stable retailers operate on 2–4% net margins as a structural feature of their category. What matters more than the absolute number is whether the margin is stable and predictable, or eroding as the business scales, which is often a sign that growth is being bought with unsustainable ad spend or discounting.

Common Mistakes That Quietly Kill Margin

Pricing off gross margin instead of net margin. A product that looks profitable at the gross-margin level can be a net loser once realistic advertising and return costs are added. The mistake isn't the gross margin calculation itself, it's stopping there.

Treating free shipping as costless. Free shipping is a real expense wearing a marketing costume. If it's not built into the product price or a minimum order threshold, it comes directly out of margin.

Ignoring return rate by SKU. Aggregate return rate can look manageable while one or two high-return products (commonly sizing-dependent apparel) are dragging the average up and quietly losing money on every unit sold.

Chasing revenue growth through discounting. A 20%-off promotion that increases order volume by 15% often reduces total profit even though the top-line revenue number looks better, a calculation worth doing explicitly rather than assuming volume growth offsets margin loss.

Not revisiting supplier and shipping rates as volume grows. Many stores negotiate cost of goods and freight rates once, early on, and never revisit them, even after volume has grown enough to justify meaningfully better terms.

Improving Margin Without Just Raising Prices

Raising prices is the most visible lever and often the last one worth pulling, because it directly affects conversion rate and can offset any margin gain with lost volume. Several other levers tend to move net margin more reliably.

Reducing the return rate on the highest-return SKUs (through better sizing guides, more accurate product photography, or clearer materials/fit descriptions) often has an outsized effect precisely because returns carry costs beyond the refund itself.

Renegotiating cost of goods sold once order volume justifies it, or consolidating suppliers to unlock better freight rates, addresses the largest single cost line for most physical-product stores.

Lowering customer acquisition cost by improving retention and repeat-purchase rate reduces reliance on paid acquisition for every sale. A returning customer typically costs far less to sell to than a new one acquired through paid ads.

Reviewing platform and payment-processing tiers as volume grows: Shopify's transaction rate, for example, steps down at higher-tier plans, and the difference compounds across thousands of orders.

Bundling or adjusting minimum order thresholds to spread fixed costs like shipping and packaging across a larger basket size, which improves margin without touching the price of any single item.

Conclusion

Revenue tells you how much money moved through the business. Margin tells you how much of it the business actually gets to keep, and the two numbers can tell very different stories about the same store. The habit worth building isn't a single margin calculation done once, but tracking gross, contribution, and net margin separately enough to see which one is moving when something changes, whether that's a new ad channel, a shipping rate increase, or a spike in returns on one product line. That's what turns margin from an end-of-quarter surprise into a number the business can actually manage.

This article is for educational purposes only and should not be considered personalized financial, tax, legal, or investment advice.