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Investor Michael Burry warns that AI companies are hiding over $3 trillion in off-balance-sheet debt, threatening the global economy if the AI boom fails to deliver expected returns.
Investor Michael Burry, who rose to fame after predicting the 2008 housing crash, has a new target: a $US3 trillion ($4.3 trillion) bill he says is being hidden by AI companies, threatening to wreck the global economy.
Burry has developed a large social media following for his predictions of looming risks. In a recent essay, he dug deep into the arcane filings made by Big Tech to regulators to uncover a string of data centre debts he said risks popping the AI bubble. Burry poses a simple question: what if the AI excitement fails to live up to expectations? What if all the spending, most of it fuelled with debt, is overblown?
Hidden AI Debt Threatens Global Economy
Being forced to write down such a massive investment would deliver a huge blow to the profits of these companies, which have a combined valuation of about $US13 trillion. Yet in a worrying sign for investors, Burry's analysis suggests these companies are on the hook for far more. To make matters worse, he shows how the AI companies have kept these commitments off their balance sheets under controversial accounting rules.
A company can sign a non-cancellable 20-year data centre lease, disclose it in a footnote, and carry nothing on the balance sheet until the keys turn and the data centre boots up, Burry says. This has allowed five AI giants to sign $US1.2 trillion of leases on future data centres, of which at least $US857 billion is non-cancellable, while keeping those liabilities off their balance sheets.
Similarly, the group has made more than $US1.5 trillion worth of promises to pay for supply chain items, known as purchase commitments. These do not appear on their balance sheets either but are shown in regulatory filings. Add in various special purpose vehicles, guarantees and other items, and the total worth of their off-balance-sheet obligations climbs above $US3 trillion. Burry says the pace of growth suggests this figure could reach $US5 trillion by 2028.
Off Balance Sheet Leases Reach Trillions
Let us also remember this past year, the combined earnings of the big five are less than $US400 billion, Burry says. This is a gargantuan bet on gargantuan growth. The risk here for all of this is what happens when the music stops. Burry also points out that more than $US400 billion has been spent by the big five AI companies on construction already in progress.
These items do appear on balance sheets but are not shown as depreciating. Such fears have started to take the gloss off the magnificent seven US tech stocks, with Oracle, Microsoft and Meta all falling from their stockmarket peaks in recent weeks. The core argument is whether all of the spending by hyperscalers can generate the necessary return on invested capital to justify it, says Ross Mayfield, an investment strategist at US-based Baird.
It is a fair argument, and one reflected in both the magnificent seven and Oracle underperformance in 2026. Julian Klement, an analyst at UK-based Panmure Liberum, says that even if demand for AI does live up to the hype, the effect on hyperscaler balance sheets of these commitments will be huge. Once that off-balance-sheet debt comes on, the interest expense and the amortisation and depreciation charges start to explode for these companies, Klement says.
Once these data centres become revenue-generating in the next two years or so, this off-balance-sheet debt will have to come onto the balance sheet and will have to be serviced, including paying interest and amortising the assets acquired with this debt. Oracle this week attempted to declare force majeure on a massive data centre project in New Mexico, a legal protection designed to shield parties from events that prevent them from fulfilling a contractual obligation.
Impairment Risks Mirror Past Tech Failures
In the past, there have also been examples of what happened when the music stopped on major investments by tech companies. Meta took a $US5 billion impairment on its 2022 results when it concluded it had leased too much office space after COVID. The same could happen with AI data centres. Too little demand will lead to an oversupply of capacity.
As Burry says: Data centres, when they are not needed, will be written down. So what if the worst happens and these massive AI investments are at least partially written off? There will be a fairly large hit to their earnings, says Chris Clothier, co-chief investment officer at London-based CG Asset Management. Let us say that we get halfway or all the way through this monumental capex build out, trillions and trillions of dollars spent.
Most of it has been financed with debt. Then all of a sudden we see that the revenues are not going to be there to generate reasonable returns on those investments. The next thing that is going to happen is that the valuations of the frontier AI labs, OpenAI and Anthropic, are going to collapse, whether publicly or privately, Clothier says. Of course, the hyperscalers and the chip companies are themselves very large investors in those businesses.
Accounting Tricks Hide Growing Financial Liabilities
And then on top of that, you are then required to bring a bunch of liabilities that are currently off balance sheet onto the balance sheet. In response, Klement expects more accounting tricks from the AI hyperscalers. Microsoft announced it would shift future data centre leases from finance leases to operating leases, he says.
This means it can depreciate the leases at a lower rate, and the leases no longer show as cash out from investing activities but as cash out from operating activities in the cash-flow statement. The result of this accounting change is that its projected capex drops from $US190 billion to $US175 billion without the company actually changing its spending by one dollar. Klement would not be surprised if other companies followed suit with their accounting practices in coming quarters.
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theage:AI’s hidden $4.3 trillion bill could wreck world economy, warns Big Short investor 
brisbanetimes:AI’s hidden $4.3 trillion bill could wreck world economy, warns Big Short investorThis story was compiled and edited by the HeadTopics newsroom and HT AI from the reports above.
Michael Burry AI Debt Data Centres Off-Balance-Sheet Accounting Tech Crash Off-Balance-Sheet Liabilities Hyperscaler Capex Data Centre Leases Off-Balance-Sheet Obligations Big Tech
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