A Nikkei investigation found that Alphabet, Microsoft, Amazon, Meta, and Oracle have $1.65 trillion in debt that doesn’t appear on their balance sheets, more than the $1.35 trillion they officially report. These are GPU contracts, data center leases, and joint ventures that don’t count as debt under accounting rules until the facilities go live. Meta’s hidden debt is $420 billion, triple its reported debt. Oracle’s grew 30-fold in four years. All five declined to comment.

Nikkei examined the actual filings and put a number on something the BIS already flagged as “shadow borrowing” back in March. These companies owe more off their balance sheets than on them, and the accounting rules let them keep it that way until the data centers go live.

While that’s technically legal, but it means investors looking at quarterly earnings this week are seeing less than half the picture. The reported debt will look manageable, and the $1.65 trillion in footnotes won’t make the headlines. But when those data centers start operating, the leases hit the books all at once. If AI demand comes in below projections, those facilities get marked down and the losses land on the investors and insurance policyholders who funded the construction through private credit and project bonds without realizing how much total exposure they were carrying.