How Microsoft and Meta Are Financing Their AI Capex Boom in 2026

Microsoft and Meta are increasingly funding their AI buildouts through a mix of operating cash flow, corporate bonds, off-balance-sheet special purpose vehicles, and finance leases—a notable shift from the cash-only funding model of just a few years ago.

Microsoft's Funding Mix

Microsoft has set 2026 capital expenditure guidance around $190 billion for the calendar year, though a lease-classification change puts fiscal spending closer to $130-145 billion including finance lease principal payments—a roughly 90% jump from the prior year. The company has issued $65 billion in investment-grade bonds over the past six months, and Citi's research desk calculates that Microsoft's roughly $80 billion annual free-cash-flow run-rate no longer covers its capex commitments, projecting an additional $100 billion in borrowings through 2027. Microsoft's long-term debt rose to $83.66 billion by mid-2026, up from $58.74 billion at the end of 2025, even as cash and marketable securities stood at $90.26 billion.

Meta's Funding Mix

Meta raised its 2026 capex guidance to $125-145 billion, citing rising memory chip costs and growing competition for land, power and skilled labor. The company priced a $25 billion investment-grade bond sale in six tranches in April 2026, its total debt has climbed from about $36 billion in 2023 to $84 billion by early 2026, and it also sold its first-ever 30-year bond tranche. Beyond corporate bonds, Meta has built at least two special-purpose-vehicle-backed data center financings, including a roughly $13 billion package for its El Paso, Texas facility led by Morgan Stanley and JPMorgan, structured as mostly debt with a smaller equity slice and a strategic venture with BlackRock.

Why Both Are Turning to Debt

Big Tech's shift toward debt marks a departure from the historical norm of self-funding expansion purely through operating cash flow, and Meta, Alphabet, Amazon and Microsoft collectively plan roughly $725 billion in 2026 capex, up 77% from 2025's already-record $410 billion. Morgan Stanley forecasts global AI-related debt issuance will nearly double to about $570 billion in 2026, while AI-linked companies already account for roughly 49% of all investment-grade bond issuance and 38% of high-yield issuance so far this year. Alphabet, Amazon, Meta, Microsoft and Oracle collectively issued $121 billion in bonds in 2025, versus just $40 billion in 2020, illustrating how sharply this financing pattern has accelerated.

Funding Sources Compared

The Balance Sheet Squeeze

Bank of America and Citi strategists warn this borrowing wave now ties Big Tech equity valuations to long-term interest rates for the first time in years, since bond investors are effectively underwriting the AI buildout alongside equity holders. Some firms are also using asset-backed securities and off-balance-sheet structures tied to physical data center assets, letting companies raise capital without loading debt directly onto their primary corporate balance sheets. Meta framed its financing flexibility as a strength, noting it can attract capital "from a wide range of markets," but Motley Fool reports bond investor demand for hyperscaler debt has actually softened in 2026 as skepticism about return timelines grows.