Thinking of Buying Amazon Stock? The Company's Biggest Moneymaker Might Surprise You.

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Key Points

Amazon.com (NASDAQ: AMZN) has a clear public-facing business -- its retail website. The company's nearly ubiquitous delivery trucks provide a daily reminder of just how much shopping gets done through the e-commerce site.

But this is really just a facade, and you'll start to see that once you dig into the company's earnings statement. Here's what you need to know about Amazon before you buy its stock.

An Amazon flex driver delivering package to door step.
Image source: Getty Images.

Amazon sells a massive amount of stuff

In the first quarter of 2025, Amazon recorded nearly $64 billion worth of product sales. That's a massive figure by any stretch of the imagination. The company is clearly a retailer and an important one. But when you move down its income statement, some interesting numbers start to show up.

Specifically, the company's cost of sales figure, which includes "the purchase price of consumer products, inbound and outbound shipping costs, including costs related to sortation and delivery centers and where we are the transportation service provider, and digital media content costs where we record revenue gross, including video and music." There's a lot in there to dig through.

First off, cost of sales basically includes the costs of the products Amazon sells. That makes sense. It also includes the expenses involved in moving and sorting those products, which again seems pretty logical. But then there are its digital media content costs -- rolling those up into this metric seems odd.

However, the media business was built around Amazon's Prime offering, which pairs free shipping with streaming. Streaming is, in this case, an enticement to consumers, luring them to pay Amazon those annual subscription fees for its loyalty program. In that context, including its costs along with product sales makes sense. The problem here is that the cost of sales in the first quarter was nearly $77 billion, more than $10 billion more than its product sales.

From this perspective, Amazon is a big retailer, but it is also a pretty terrible retailer.

What Amazon does well

It's a good thing that product sales is just one of the company's two main lines of revenue. The other is services, where it generated $92 billion in income in the first quarter. Services is a broad category that includes "third-party seller fees, which includes commissions and any related fulfillment and shipping fees, AWS sales, advertising services, Amazon Prime membership fees, and certain digital media content subscriptions."