AWS is printing money, but Amazon can’t stop spending it fast enough

Amazon dropped its Q1 numbers yesterday, and the headline is familiar: AWS is still the cash cow, growing faster than analysts predicted. Revenue hit $25.4 billion, up 17% year-over-year, which is higher than I expected given the macro headwinds. But the real story isn’t the top line — it’s where that money goes.

Capital expenditure hit $18.7 billion for the quarter, a 30% jump from last year. That’s a lot of servers, networking gear, and data center concrete. CEO Andy Jassy made it clear during the earnings call that this isn’t a temporary spike. He said they’re investing heavily in AI infrastructure, and I believe him. This is the same playbook we saw with AWS’s initial buildout: spend big, build deep, and let competitors choke on the dust.

The market reaction was interesting. Shares moved up modestly in after-hours trading, which tells me investors are okay with the spending as long as AWS keeps taking share. And it is. AWS now holds roughly 32% of the cloud market, according to Synergy Research, while Microsoft Azure sits at 23% and Google Cloud at 11%. The gap isn’t closing as fast as some expected.

But here’s my take: Amazon’s spending spree is a double-edged sword. On one hand, they’re locking in capacity and custom silicon (Trainium, Inferentia) that could give them a cost advantage for years. On the other hand, operating margins at AWS dropped slightly to 28.4% from 29.1% last quarter. That’s not alarming, but it shows the capex is eating into profitability.

Jassy also hinted at something I’ve been watching closely: the enterprise AI shift. He mentioned that companies are moving from experimenting with AI to actually deploying it in production workloads. That’s exactly what AWS needs. If enterprises start running their inference workloads on AWS instead of just training models elsewhere, that $18.7 billion quarterly spend starts looking like a smart bet.

Of course, there’s the obvious question: what happens if AI demand softens? Amazon would be stuck with a massive overhang of unused capacity. But I don’t see that happening in the near term. Every major cloud provider is in a capex arms race right now, and Amazon has the deepest pockets. Microsoft and Google are spending heavily too, but Amazon’s retail business gives it a cushion that pure-play cloud providers don’t have.

The bottom line? AWS is still the leader, and Amazon is betting that leadership requires building ahead of demand. They’re right, but the margin pressure is real. I’ll be watching next quarter’s numbers closely to see if that capex-to-revenue ratio starts to improve. If it doesn’t, even the most patient investors might start asking questions.