Big Tech Is Guaranteeing $300 Billion of AI Debt That Never Touches Its Balance Sheet

Alphabet's data center guarantees went from $16.9 billion to $43.8 billion in six months. Less than 2 percent of that increase shows up as a liability on its balance sheet. That is not an accounting error. It is the point.

How the guarantee actually works

The mechanism is a residual value guarantee. Investors lend billions to build a data center. The tech company does not borrow that money directly. A special purpose vehicle, a separate legal entity co-owned with a private credit firm, does the borrowing and holds the asset. The tech company signs a long-term lease to use the facility once it is built, and separately promises that if the chips or the building are ever sold for less than an agreed value, it will cover some of the shortfall.

Because the debt sits on the special purpose vehicle's books rather than the parent company's, most of the exposure never shows up as ordinary debt. Accounting rules only require companies to book the portion of a guarantee they consider a probable loss, not the full amount they are on the hook for. That gap between guaranteed and booked is where the $300 billion figure lives.

The company-by-company tally

Alphabet's version runs through Fluidstack, which leases data centers stocked with Google TPU chips and rents the capacity to Anthropic. Alphabet guarantees the lease payments, which lets Fluidstack borrow at a lower rate than it could on its own, while Alphabet books only its estimate of probable losses rather than the full guaranteed amount.

Meta's version is a joint venture called Beignet Investor, built with Blue Owl Capital for a data center project in Richland Parish, Louisiana. Meta holds a 20 percent stake; Blue Owl controls the other 80 percent. Pimco, BlackRock, and Apollo supplied roughly $27 billion of the debt, and Meta backs it with a $28 billion guarantee. The leases are structured in four-year segments specifically to avoid triggering long-term debt classification.

Nvidia has gone further still, backing a SoftBank-financed data center project for OpenAI in Ohio with a $105 billion guarantee. Broadcom carries about $29 billion of exposure tied to chip financing for Anthropic. Across nine major tech and chip companies, off-balance-sheet AI commitments now add up to close to $3 trillion, nearly five times their combined capital spending over the past year.

Regulators were already circling before this reporting

In January, members of the Senate Banking Committee sent Treasury Secretary Scott Bessent a letter asking the Financial Stability Oversight Council to formally investigate AI-related debt. The letter, addressed to Bessent as FSOC chair, argues that arrangements like credit tenant lease financing let companies obscure their true balance sheets, pointing specifically to Meta's Hyperion joint venture with Blue Owl as an example of debt that lets a company appear healthier and less leveraged than it actually is.

The letter cites its own math on the broader buildout: AI and Big Tech companies are projected to spend nearly $3 trillion on data centers by 2028, but only about $1.4 trillion of that is expected to come from their own cash. Of the resulting $1.6 trillion gap, the letter projects $800 billion will come from private credit funds, $150 billion from asset-backed and commercial mortgage securitizations, $350 billion from private equity, and $200 billion from traditional bonds.

It also flags early stress signals. A credit default swap spread on CoreWeave's debt widened by roughly 280 basis points between September and November. Oracle credit default swap volume jumped from under $200 million to about $4.2 billion in six weeks.

“A lot of that corporate issuance, I would say, is almost yield-agnostic, because the build-out for AI, the returns on that, the companies believe they're going to be so high. They don't really care what they're paying.”

Why the plumbing matters more than the headline number

None of this makes the guarantees illegal or even unusual by Wall Street standards. Residual value guarantees and special purpose vehicles are decades-old tools, common in aircraft leasing and commercial real estate long before AI needed data centers. The distinguishing feature here is scale layered onto concentration: a handful of companies, Nvidia, Meta, Alphabet, Microsoft, Amazon, and Broadcom among them, are guaranteeing each other's buildouts, selling each other chips, and leasing each other's capacity, so a slowdown at any one link does not stay isolated.

The Senate letter's most concrete illustration of that interlock involves Nvidia, CoreWeave, and OpenAI. Nvidia holds a stake in CoreWeave, whose data centers run exclusively on Nvidia chips CoreWeave has purchased. OpenAI has committed to pay CoreWeave $22 billion for computing capacity and received $350 million in CoreWeave stock as part of that deal, while Nvidia has separately pledged to backstop any of CoreWeave's unsold cloud capacity through 2032. Money and obligations move in a loop among a small number of counterparties, which is exactly the structure that turns a localized disappointment into a systemic one.

Alphabet, Meta, Nvidia, and Broadcom have not disputed the guarantee figures reported against them. What none of the four companies has said publicly is what happens to the $298 billion difference between what they have promised and what they have booked, if AI revenue growth disappoints the way OpenAI's chief financial officer and Meta's own chief executive have both said, in separate public remarks, is a real possibility.