Amazon spent $77.3 billion in one quarter on AI buildout, and its trailing free cash flow is now negative $42.4 billion

Amazon's cloud unit grew faster than the 37% it reported a quarter earlier, and the company spent $77.3 billion on property and equipment in a single quarter. Both facts sit in the same filing. Amazon reported third-quarter 2026 results on October 29, 2026, and the numbers are the clearest picture yet of what the AI buildout costs the companies paying for it.

What Amazon reported

According to the earnings release Amazon filed with the SEC, Amazon Web Services had net sales of $46.0 billion in the quarter ended September 30, 2026, up 39% from a year earlier. Amazon puts the annualized run rate at $184 billion. Total net sales were $201.9 billion, up 12%, and operating income rose to $28.1 billion from $17.4 billion a year earlier, a 13.9% operating margin.

Amazon says the Prime Day shift into the second quarter cut about 400 basis points from third-quarter growth, which is why the company-wide figure looks modest next to AWS. The company guided fourth-quarter net sales to $240.0 billion to $247.0 billion.

The bill

The cost side is where the filing gets uncomfortable. Amazon's purchases of property and equipment were $77.3 billion in the quarter alone. On a trailing twelve month basis, gross purchases were $215.2 billion, or $210.7 billion net of proceeds and incentives, up $94.8 billion from the prior period. Amazon attributes the increase mainly to AI investment, and its outlook for 2026 cash capex is about $220 billion.

The cash result follows from that. Trailing twelve month free cash flow was an outflow of $42.4 billion for the period ended September 30, 2026, compared with an inflow of $14.8 billion a year earlier. A company that generated nearly $15 billion of free cash a year ago is now burning more than $42 billion.

To keep the comparison honest: the $77.3 billion covers all of Amazon, not only AWS, so it is not a clean ratio against AWS revenue. Even so, it is about 1.7 times the $46.0 billion AWS booked, and most of the increase is described by Amazon itself as AI spending.

Sold out, according to the CEO

Why spend like this? Andy Jassy's argument is demand. Speaking on an Andreessen Horowitz podcast on October 23, 2026, he said "2027 is largely sold out" and "A good chunk of 2028 is sold out," as quoted by 24/7 Wall St. The same report notes that Amazon has not disclosed the contracted capacity or backlog behind those statements, so they remain the chief executive's characterization rather than a filed number.

That distinction matters. A filed backlog is a legal figure that auditors look at. A podcast comment is a signal about demand, and it is also a sales message to customers deciding whether to book capacity before it runs out. Both can be true. Only one is checkable.

How it compares

Amazon is not alone in the spending. Alphabet reported $51.4 billion of capital spending for the same quarter and negative free cash flow of $9.1 billion, according to its own release. Meta reported $34.9 billion of capital spending and negative free cash flow of $2.1 billion; we covered Meta's negative free cash flow when it reported. Amazon's outflow is the largest of the three on a trailing basis.

What differs is the revenue on the other side. AWS is growing 39% on a base of $46.0 billion a quarter. That is a very large business accelerating, which is a better position than spending heavily against promises. The risk is the gap between the two lines persisting for years.

The quote and what it implies

Jassy's line in the release, "There has never been a trillion dollar revenue business, and we may have two of them in the next 5-10 years," is a statement of ambition, not guidance. Amazon's total sales are about $200 billion a quarter, which is roughly $800 billion a year at the current pace, so the claim is not absurd for the retail side. For AWS alone, a $184 billion run rate would need to grow more than fivefold to reach that mark. Nothing in the filing says which businesses Jassy means or gives a date.

What the 400 basis points tell you

Amazon's note about Prime Day timing is easy to skip and worth keeping. The company says the shift of Prime Day into the second quarter cut about 400 basis points from third-quarter growth. That means the 12% growth in net sales understates the underlying pace, and it also means year over year comparisons in the fourth quarter will be cleaner. For an AI infrastructure story the point is narrower: the retail calendar is noise around the cloud line, and the cloud line is the one to follow. AWS net sales rose 39% in a quarter that had no such distortion, and operating income of $28.1 billion shows the whole company is still very profitable while it spends. ## What to watch

Three things will tell us whether this is investment or overbuild. First, whether AWS growth holds near 40% as the base grows; Amazon's own commentary suggests it expects that. Second, whether capex per quarter stabilizes or keeps climbing toward the fourth quarter. Third, whether free cash flow turns the corner as the data centers Jassy says are sold out start earning.

Our read: the revenue acceleration is the strongest evidence yet that the demand is not imaginary, and the cash burn is the strongest evidence that the financing question is real. Anyone treating either number alone is telling half the story. The next filing will show whether the two lines are converging.