For every dollar hyperscalers earn from AI today, they’re spending twelve dollars to build more capacity.1 That’s the bet embedded in $575 billion of capital expenditure this year.2

How fast does AI revenue need to grow to pay back this data center mortgage?

Hyperscaler CapEx vs Cash from Operations 2016-2026

From 2020 to 2024, hyperscalers issued an average of $20 billion in bonds annually.3 In 2025, that jumped to $96 billion. In 2026, it will reach $159 billion.3 Morgan Stanley projects $1.5 trillion over the next few years.4

Amazon, Microsoft, Alphabet, Meta, & Oracle will spend 90% of their operating cash flow on AI data centers in 2026, up from a historical average of 40%.2

Alphabet issued a century bond, the first by a tech company since Motorola in 1997.5 The debt matures in 2126. Who knows what AI will look like then, or whether Alphabet will exist to repay it.

Hyperscaler Bond Issuance 2020-2026

What assumptions justify this borrowing?

The depreciation schedules encode the bet. Most hyperscalers depreciate AI infrastructure over five years.6 At 60% gross margins & 5% borrowing costs, a 5-year payback on $431B in AI capex requires $180B in annual revenue.7 Current AI revenue is $35 billion.1 They’re underwriting 5x growth in five years.

AI Infrastructure Payback Period by Revenue Scenario

Nvidia’s stated goal is to release new GPU architectures every twelve months, which will compress depreciation cycles. If chips become obsolete in three years rather than five, the required annual revenue jumps to $276B, 7.9x current levels.8

As Michael Mauboussin writes, there’s information in prices. The depreciation schedules tell us what hyperscalers believe : AI revenue will grow 5x within five years. The debt markets are betting alongside them.

  1. Asymco : The Most Brilliant Move in Corporate History? ↩︎ ↩︎

  2. Bank of America Hyperscaler Capex Estimates ↩︎ ↩︎

  3. CNBC : Big Tech’s AI Bond Binge ↩︎ ↩︎

  4. Fortune : Google, Meta, & Oracle’s $1 Trillion Borrowing Spree ↩︎

  5. Bloomberg : Alphabet Plans Tech’s First 100-Year Bond Since Dot-Com Era ↩︎

  6. Hyperscaler Depreciation Policies ↩︎

  7. Calculation : $431B capex ÷ 5 years = $86B depreciation + $22B interest (5% on $431B) = $108B annual cost. At 60% margin, requires $180B revenue ($108B ÷ 0.60). ↩︎

  8. This analysis focuses on direct AI revenue & does not account for internal AI consumption (Copilot, Search, recommendations, internal engineering) that generates value through existing revenue streams. Older chips may retain residual value for inference even after becoming obsolete for frontier training. ↩︎