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Neither company’s latest disclosures show a broad retreat from AI-related infrastructure spending. Microsoft said its underlying 2026 investment expectation was unchanged; its reported capex outlook moved from roughly $190 billion to about $175 billion because of a shift from finance leases to operating leases. Amazon’s 2026 spending target was reported by the Associated Press as rising from $200 billion to $220 billion. Those are different kinds of changes, and neither guarantees that every project will proceed or that future returns will cover the investment.
What the latest figures do—and do not—say
The comparison combines forecasts with results already recorded. Microsoft’s latest figures are from its fiscal fourth quarter, ended June 30, 2026; its fiscal year also ended that day. Amazon’s latest cited results are for the quarter ended June 30, 2026. Both companies report substantial infrastructure investment alongside fast cloud growth, but the available figures do not isolate AI-specific spending on a comparable basis.
| Measure | Microsoft | Amazon |
|---|---|---|
| Latest period reported | FY2026 Q4, ended June 30, 2026 | Q2 2026, ended June 30, 2026 |
| Recent investment outlook | About $175 billion of calendar-2026 capex, after a lease-mix change; Microsoft said underlying investment expectations were unchanged. Its prior outlook was roughly $190 billion. | $220 billion of 2026 capital spending, up from a $200 billion plan, according to Associated Press reporting of CEO Andy Jassy’s remarks. The figure was not stated in the Amazon earnings release. |
| Latest quarterly infrastructure spending measure | $41 billion of capex in FY2026 Q4; $35.8 billion was cash paid for property and equipment, and $5.6 billion was finance leases. | The Q2 release does not give a corresponding quarterly capex figure in the cited material. It reports a $66.1 billion year-over-year increase in net property-and-equipment purchases over the trailing twelve months. |
| Cloud growth | Azure and other cloud services grew 43% in FY2026 Q4. | AWS net sales were $42.2 billion in Q2, up 37% year over year. |
| Free cash flow | $19.6 billion in FY2026 Q4. | A $7.6 billion outflow over the trailing twelve months through Q2 2026. |
The periods and measures are not interchangeable: Microsoft’s free cash flow figure is quarterly, while Amazon’s is trailing-twelve-month. Likewise, Microsoft’s $41 billion capex includes finance leases, whereas its $35.8 billion cash property-and-equipment figure records cash paid. Amazon’s reported full-year target is a broader spending forecast and comes from secondary reporting.
Why Microsoft’s capex outlook fell on paper
On its April 29, 2026, FY2026 Q3 call, Microsoft forecast roughly $190 billion in calendar-year 2026 capex, including about $25 billion attributed to higher component prices. On July 29, it put the reported expectation at approximately $175 billion after changing the anticipated mix of future data-center leases. Microsoft includes finance leases in its capex measure but excludes operating leases.
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Microsoft said the underlying investment expectation had not changed. The difference therefore should not be read as a $15 billion reduction in the planned physical buildout. Lease classification changes the reported capex figure, even when the broader economic commitment to data-center capacity is not described as smaller.
What Microsoft has spent and what it says comes next
Microsoft reported $41 billion of capex in FY2026 Q4. About two-thirds went to short-lived assets, primarily CPUs and GPUs; the rest went to longer-lived assets. The quarter also included $5.6 billion in finance leases, primarily for large data-center sites. Microsoft reported $55.4 billion in cash from operations and $19.6 billion in free cash flow, with higher capex among the factors affecting free cash flow.
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Demand and monetization were strong in the same quarter: Azure and other cloud services grew 43%, and Microsoft said customer demand exceeded available capacity and additional Azure capacity brought online during the quarter was quickly monetized. The company also reported $678 billion in commercial remaining performance obligations, with a weighted average duration of 2.3 years. That backlog includes commitments beyond AI and should not be treated as $678 billion of AI revenue.
For FY2027, Microsoft said capex would grow year over year and that it expected to remain free-cash-flow positive. These were management’s forward-looking statements on July 29, 2026, not reported results.
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Amazon’s spending increase and cash-flow pressure
Amazon’s July 30, 2026, Q2 release reported AWS net sales of $42.2 billion, up 37% year over year, and AWS operating income of $16.6 billion. CEO Andy Jassy said AWS grew 36.7% year over year and that Amazon’s AI and chips businesses each exceeded $25 billion annualized revenue run rates. Those are company-reported descriptions; the release excerpt does not define the businesses’ boundaries in detail.
The release reported trailing-twelve-month operating cash flow of $161.4 billion, up 33%, but free cash flow was a $7.6 billion outflow. Amazon attributed the year-over-year free-cash-flow decline primarily to a $66.1 billion increase in net property-and-equipment purchases, reflecting primarily investments in AI.
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The Associated Press reported on July 30 that Amazon expected 2026 capital spending of $220 billion, up from the $200 billion plan announced in February. The reported total includes technology, AI, robotics, semiconductors and satellites; it is not an AI-only figure. Because Amazon’s earnings release does not state the $220 billion target, treat it as AP’s reporting of Jassy’s disclosure rather than a figure directly confirmed in that release.
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Microsoft CFO Amy Hood said CPUs and GPUs make up the largest component of capex and have relatively short lead times, allowing Microsoft to slow or stagger purchases if demand changes. She also described data-center land and construction timing as flexible. These statements identify management’s potential levers; they do not establish that Microsoft has used them or eliminate the risk of underused capacity.
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The asset mix matters for investors. Microsoft said about two-thirds of its Q4 capex went to shorter-lived CPUs and GPUs, which may need replacement sooner than buildings and other long-lived assets. That creates a refresh-cycle exposure alongside the possibility of adjusting some purchases. The disclosed mix is Microsoft’s; the cited evidence does not establish an equivalent breakdown for Amazon.
What this means for investors
These disclosures support a narrower conclusion than either “AI spending is collapsing” or “the spending is certain to pay off.” Microsoft’s reported outlook change is tied to lease accounting, while Amazon’s reported full-year target increased. At the same time, quarterly and trailing-twelve-month cash-flow figures show that infrastructure investment is financially consequential, and strong cloud growth is not proof that all future capacity will earn an adequate return.
- Separate guidance from results. Microsoft’s calendar-2026 and FY2027 outlooks are forecasts; Amazon’s $220 billion 2026 figure is AP-reported guidance, not an actual spending result.
- Read the accounting basis. A capex number that includes finance leases is not directly equivalent to cash purchases of property and equipment or a measure that excludes operating leases.
- Do not equate cloud growth with AI returns. Azure and AWS growth indicate demand for cloud services, but neither company’s cited figures provide a comparable AI-only capex and return calculation.
- Watch cash generation alongside investment. Amazon’s negative trailing-twelve-month free cash flow and Microsoft’s positive quarterly free cash flow cover different periods, so they should not be used as a like-for-like ranking.
The evidence available through the companies’ late-July 2026 results and AP’s reporting does not establish a broad pullback by either company. It also cannot settle whether the infrastructure now being built will generate returns sufficient to justify its cost.
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