The artificial intelligence boom is forcing the world's largest technology companies into an unprecedented spending arms race — and the financial strain is becoming impossible to ignore.
A Reuters analysis of LSEG consensus estimates reveals that the five so-called "hyperscalers" — Microsoft, Alphabet (Google), Amazon, Meta Platforms, and Oracle — are on track to spend more on capital expenditures than they generate in free cash flow by 2027. The data shows these companies will generate roughly $340 billion more in annual operating cash flow in 2027 compared to 2025, but capex is expected to rise by approximately $534 billion over the same period. That works out to about $1.57 of additional investment for every $1 of additional cash flow.
Current-year consensus estimates for the five companies' capex have surged from roughly $485 billion in January to around $730 billion in July, according to LSEG data. Analysts say the trajectory is unsustainable without either AI revenue catching up or shareholder returns taking a hit.
"Investors are underestimating how fundamentally AI is changing the Big Tech business model," said Shay Boloor, chief market strategist at Futurum Equities. "These companies were historically valued as asset-light platforms because revenue could scale much faster than capital requirements, but AI is pushing them toward a hybrid model where software, advertising and cloud economics increasingly depend on enormous physical infrastructure spending."
Oracle is the most extreme case. Its capex as a percentage of operating cash flow rose from 47% in fiscal 2022 to 174% in fiscal 2026. The database giant plans to raise $45 billion to $50 billion through debt and equity to fund cloud infrastructure expansion. Its shares have lost 36% so far this year.
Amazon's trailing 12-month operating cash flow rose 30% to $148.5 billion in the first quarter, but free cash flow fell to just $1.2 billion. Microsoft reported $35.8 billion in operating cash flow in its fiscal second quarter while recording $37.5 billion in capital expenditures.
There are some bright spots. Microsoft has said its AI business has surpassed a $37 billion annual revenue run rate, and Amazon's AWS unit grew 28% in its first quarter. Alphabet reports earnings on Wednesday, with investors watching for signs that cloud and AI revenue can keep pace with the spending surge.
But buybacks could be at risk if spending remains elevated and AI monetization takes longer than expected. "Over the next two to three years, companies need to show that AI is driving incremental revenue, expanding margins and improving cash flow," said Freddy Lavric, senior trader at Winthrop Capital Management. "If those financial benefits aren't becoming evident by then, the market will start questioning whether the investment cycle has gone too far."
