How to read capex without mixing cash, leases and guidance

A capex headline can describe a cash payment, equipment obtained under a lease or management's plan for next year. Each can be useful. The mistake is treating them as the same number because they all have a dollar sign.

The November 5 chip-stock selloff shows why fears about future AI spending should not be confused with cash already paid for equipment.

This guide is about reading the definition, not ranking spending or predicting share prices. The examples below come from reports for the quarter ended Sep 30, 2026, checked against the original disclosures. Our guide to reading a 10-Q shows where those statements sit in a filing.

Start with the statement, not the headline

Find purchases of property and equipment, sometimes called additions to property and equipment, in investing activities. That is a cash-flow line. Do not substitute the balance-sheet value of property and equipment: the balance sheet is a stock of assets at a date, while the statement reports flows over a period.

Microsoft's Sep 30, 2026 10-Q makes the distinction concrete. It reports $39.367 billion of cash additions to property and equipment for the three-month period. Its balance sheet shows $346.844 billion of net property and equipment at quarter-end. Neither number is a substitute for the other.

Leases create more than one clock

A finance lease can put equipment into service before all the cash has been paid. The lease note can therefore show an asset added, interest paid and principal paid at different amounts. Adding them together without a definition can count different parts of the same arrangement more than once.

In Note 12 of the same Microsoft filing, for the three months ended Sep 30, 2026:

• Right-of-use assets obtained in exchange for finance-lease obligations were $5.192 billion.
• Financing cash flows from finance leases were $1.000 billion.
• Operating cash flows from finance leases were $769 million.

The first is a noncash asset-and-obligation event; the latter two are cash flows related to leases. They are not three versions of new cash capex. Read the company's reconciliation before attempting to bridge an earnings-call capex figure to its cash-flow statement.

The filing also discloses leases that have not yet commenced. A future lease commitment is not the same thing as equipment paid for in the current quarter. Keep commitments in a separate column rather than adding them to the quarter's cash purchases.

Four reports, four reading checks

All the following examples relate to the quarter ended Sep 30, 2026 unless explicitly labelled otherwise. Figures are in US dollars. They are intentionally not summed.

The source tables are in Microsoft's 10-Q, Alphabet's release, Amazon's release and Meta's reconciliation.

Meta's arithmetic combines components of its own explicitly defined measure. That does not authorize combining Meta's measure with another company's differently defined headline number. The definitions, rather than their shared label, decide whether a comparison is valid.

Check the period before calculating a change

Quarterly, year-to-date and trailing-twelve-month figures often appear beside one another in the same release. Amazon's Q3 cash-flow table has all three. Its trailing-twelve-month net equipment purchases were $210.657 billion, while gross purchases in the single quarter were $77.259 billion. A percentage change between those two would compare different windows, not show growth.

Use the same length of period and the same definition on both sides of a calculation. A fiscal quarter label can also differ from the calendar label: Microsoft's period ended Sep 30 is its first quarter of fiscal 2027, while the other examples here use calendar Q3 2026.

If the definition changes between reports, describe the change before presenting a trend. A neat-looking chart cannot repair an inconsistent denominator.

Guidance is a forecast, not an invoice

Amazon's Oct 29 release says it continues to expect approximately $220 billion of 2026 cash capital expenditures. Meta's Oct 21 release gives $135–145 billion of 2026 capital expenditures including principal payments on finance leases. These are management forecasts with different definitions, not amounts already spent or interchangeable estimates of AI-only investment.

Record the statement date, the forecast period, whether the figure is a range and exactly what management includes. An increased forecast can signal more planned capacity, but it does not tell you when equipment arrives, when a site is energized or when it generates revenue.

Likewise, do not label all company-wide property and equipment purchases as GPU spending. Our explainer on where AI infrastructure capex goes covers chips, networking, buildings and power; the cash-flow line alone does not split them out.

Build a comparison you can audit

For each company, keep one row with the period, currency, cash equipment purchases, any proceeds netted against them, lease principal, newly recognized lease assets and the separately stated guidance. Attach the original source and a short definition beside every figure.

Leave a cell blank when the matching measure is not disclosed or cannot be reconciled. Do not fill it with a different measure just to produce a total. If you also track free cash flow, use the company's stated reconciliation rather than inventing a uniform formula that silently changes its treatment of leases.

Capex tells you about resources committed to long-lived assets. It does not, by itself, establish demand, future returns or whether the spending is profitable. A defensible reading starts with a smaller claim: what was paid, what was acquired, what was promised and over which period.