Amazon swings to $42.4 billion free cash outflow as AI spending surges

Amazon just showed that a business can grow fast and still worry its shareholders. The company’s free cash flow over the trailing twelve months swung to an outflow of $42.4 billion as of September 30, 2026.

A year earlier, that same measure was an inflow of $14.8 billion. The culprit is a capital spending spree aimed squarely at artificial intelligence infrastructure, and Wall Street noticed.

Shares closed down 4.3% on October 29, the day Amazon released its third-quarter results. They then slid further after the bell, falling 7% in after-hours trading.

Strong growth, bigger bills

Start with the good news, because there was plenty of it. Total revenue grew 12% year-over-year to $201.9 billion for the quarter.

Amazon Web Services, the cloud division that rents out computing power to other companies, did even better. AWS revenue rose 39.3% to $46 billion, its fastest growth rate in nearly five years.

In the third quarter alone, Amazon spent $77.3 billion on property and equipment. That is more than double what it spent in the same quarter a year earlier.

Free cash flow is the money left over after a company pays for its operations and its investments in physical assets. When it turns negative, the company is spending more on building things than its business brings in. Amazon’s spending outpaced its cash generation by $42.4 billion over twelve months.

Operating cash flow, the cash produced by Amazon’s day-to-day activities, rose 29% to $168.3 billion over the trailing twelve months.

The $220 billion question

The company maintained its capital expenditure guidance at an estimated $220 billion for 2026. It also signaled that spending may climb even further in 2027.

Amazon’s long-term debt increased to approximately $173 billion.

How Amazon got here

The swing from a $14.8 billion free cash inflow to a $42.4 billion outflow in a single year shows how dramatically the AI buildout has changed that math.

The spending is concentrated on AI infrastructure designed to strengthen AWS. The 39.3% revenue growth suggests the demand side is showing up.

What this means for investors and the AI trade

A quarter with 12% revenue growth and the fastest AWS expansion in nearly five years still produced a 7% after-hours drop.

There are a few specific things worth tracking from here. First, whether Amazon holds to roughly $220 billion in capital expenditures for 2026 or adjusts that figure. Second, how much higher 2027 spending goes, given the company’s signal that it may rise further. Third, whether AWS can sustain growth near its current 39.3% pace.

The debt load, now approximately $173 billion in long-term borrowings, is the other variable. Amazon’s operating cash flow of $168.3 billion provides a substantial cushion.