Data Center Investment Surpasses America's All-Time Megaproject Spending in Just 6 Years

In 2024 dollar terms, data center capex has reached roughly $930 billion in just 6 years, surpassing the cumulative spending of America's most iconic megaprojects in history.

• The comparisons include the Interstate Highway System ($620 billion, 37 years), US Railroads ($550 billion, 71 years), F-35 Program ($400 billion), Apollo Program ($257 billion), Marshall Plan ($170 billion), ISS ($150 billion), and the Manhattan Project ($36 billion).
• The chart converts all figures into 2024 dollars and compares cumulative spending against years elapsed since each project began.
• Data center investment is already overwhelming at the 2025 baseline, and when including 2026 planned figures, it is on track to exceed $1 trillion.
• The estimates are calculated by isolating the data center share of global capex from America's big-5 hyperscalers: Amazon, Microsoft, Alphabet, Meta, and Oracle.
• The share assumption uses a scenario expanding from about 55% in 2020 to about 80% in 2026, and Chinese hyperscalers are excluded.

The core message is that AI data center investment has caught up, in just a few years, to spending levels that past large-scale national projects took decades to accumulate. At the same time, there remains room for interpretation as to whether these figures represent actual disbursed spending or a mix that includes commitments, and which items are counted within capex.