How Amazon gets paid when you shop elsewhere

The shopfront is not the whole business

Imagine buying a kitchen accessory from a small brand’s own website. You pay that brand, receive its order confirmation and expect its parcel. Behind the scenes, the merchant may have chosen Amazon’s Multi-Channel Fulfilment service to store, pick, pack and deliver the order. Amazon can therefore earn a service fee even though the customer did not check out on Amazon’s marketplace.

The important word is chosen. This is a commercial service, not a compulsory toll on everybody else’s shopping. Amazon’s multichannel tools illustrate how a business can sell access to its capabilities as well as sell products. A useful first question for an owner is: what does the customer buy from us, and which other businesses get paid before we finish delivering it?

The parcel offers a better starting point than an enormous revenue headline. Follow one order all the way through. Who finds the customer? Who owns the stock? Who stores it? Who handles a return? Each answer identifies a cost, a dependency or an opportunity to provide a service.

Three receipts, three different questions

Think of the transaction as three receipts. The shopper’s receipt records the sale. The service providers’ invoices record fulfilment, selling and acquisition costs. The merchant’s own calculation shows what is left. These are connected, but they are not interchangeable.

A service provider’s revenue is not automatically its profit. A merchant’s gross margin is not necessarily its contribution after delivery and advertising. And a profitable order is not necessarily money in the bank today if the stock was paid for weeks before the customer paid.

This distinction is especially useful when comparing a direct website with a marketplace. A channel with a lower visible commission can still be expensive if finding the customer costs more. A channel with more fees can still work if it delivers reliable demand or reduces other costs. Compare the complete order economics, not one conspicuous line on the invoice.

When 50% more sales leaves 25% less contribution

Here is a deliberately hypothetical example, not an Amazon rate card or a claim about any real seller. An item sells for US$50. Product cost is $20, a combined allowance for channel and fulfilment costs is $12, and returns and other variable costs are $3. That leaves $15 before advertising and before fixed overheads and tax.

At $5 of advertising per order, contribution is $10. One hundred orders produce $5,000 of sales and $1,000 of contribution. Now suppose a larger campaign produces 150 orders but costs $10 in advertising per order. Sales rise to $7,500. Contribution falls to $5 per order, or $750 in total.

The extra volume did not rescue the thinner economics. Across the two complete scenarios, sales rose 50% while contribution fell 25%. This is not a calculation of the incremental profit on the extra 50 orders: the assumed advertising cost changed across all 150 orders. Growth has done an impressive job of making the sales dashboard look busy.

The lesson is to test the cost of the next stage of growth. Cheap early customers may not represent the customers you have to win next. Use the calculator below to change the assumptions, then repeat the exercise with your own channel costs.

Amazon’s accounts ask a second question

Amazon’s June 2026 Form 10-Q reports Q2 operating income of US$27.461 billion. AWS contributed $16.621 billion of that segment operating income. These are operating measures for a quarter, not free cash flow or the profit on an individual parcel. Advertising revenue is disclosed, but this does not establish a separate advertising profit margin.

For the twelve months ended 30 June 2026, Amazon reported $161.403 billion of net operating cash flow. Subtract $169.007 billion of net cash property-and-equipment expenditure and its stated free cash flow measure is negative $7.604 billion. Net expenditure here is $173.028 billion of purchases less $4.021 billion of sale proceeds and incentives. These are consolidated amounts, not an AWS-only investment total.

The accounting lesson is broader than Amazon. Buying equipment uses cash when paid for; depreciation recognises an expense over time. Operating profit, the timing of the investment payment and the eventual return from that equipment answer different questions. Strong operating cash generation can coexist with negative free cash flow during substantial investment. Neither number alone proves that future payback will be good or bad.

Use the mechanism in a smaller business

Start with one product and one sales channel. Write down net selling price, product cost, selling fees, fulfilment, payment processing, expected returns and customer acquisition. Use a consistent tax basis. For a New Zealand business, that usually means not mixing GST-inclusive revenue with GST-exclusive costs in the same comparison.

Then put dates beside the money. When must stock be paid for? When does the platform release receipts? When does the customer refund leave the bank? A margin percentage cannot describe this calendar. A simple weekly cash forecast often makes the pressure visible sooner than a monthly profit report.

Finally, choose a decision, not just another metric. You might test a minimum order value, a smaller campaign, a different shipping offer or more disciplined purchasing. Record the assumption, the result you expect and the condition that would make you stop. A useful dashboard should change a decision; otherwise it is expensive wallpaper.

The question to take away

Amazon’s reach beyond its shopfront is a reminder that the visible seller is only one participant in a transaction. Infrastructure, distribution and customer access can each become businesses in their own right. For the merchant, the practical challenge is to understand what those capabilities cost and what value they create.

The next time sales rise, ask what happened to contribution per order, total contribution and the cash needed to serve the growth. All three deserve an answer. You do not need Amazon’s scale to use this discipline. You need one honest order calculation and a calendar.