Big Tech revenue drivers across three eras
This chart compares how aggregate Big Tech revenue growth divided between headcount and revenue per employee across three equal-length periods. It uses annual SEC filings for Apple, Microsoft, Alphabet, Amazon, and Meta and is an accounting identity rather than an estimate of AI productivity.
What does it show?
Big Tech growth was powered by expanding headcount through 2022, even as revenue per employee fell. Since 2022, about 94% of revenue growth has come from higher revenue per employee.
Methodology
Sums annual whole-company revenue and reported fiscal year-end headcount for Apple, Microsoft, Alphabet, Amazon, and Meta at the endpoints of three equal-length periods: 2016–2019, 2019–2022, and 2022–2025. Aggregate revenue growth is decomposed exactly in logs into aggregate headcount growth plus aggregate revenue-per-employee growth. Negative revenue-per-employee contributions are shown below zero, which is why this comparison uses bars rather than pie charts. The result is an accounting identity, not an estimate of AI productivity or a causal effect; acquisitions, outsourcing, prices, business mix, capital investment, and differing workforce definitions can all affect the components.