The CFO job has gone from accountant to banker to builder, and the whole finance function is being rebuilt around it: 1. Data stopped being the bottleneck. AI pulls and reconciles data across systems, so teams spend more time acting on numbers instead of chasing them. 2. The finance stack is becoming part of the finance team. AI-native tools stand up in days, pull their own data, and turn a monthly close into a daily one. 3. The rise of the finance engineer. Finance people proficient in Claude Code or Codex are building their own tools. 4. The finance team gets smaller and higher leverage. The old heuristic of finance at 5% of headcount is heading to 2% for the leanest teams. 5. Planning becomes continuous. Usage-based revenue (tokens, API calls) moves too fast for a monthly forecast, so planning shifts from annual budgets to a live view. 6. Controls become a critical feature of the product. Every number an agent touches keeps an audit trail back to its source, and finance still owns sign-off. 7. Finance gets a bigger mandate. Compute spend, people versus software, and build versus buy are now finance decisions. "The CFO is becoming a builder and architect of the company's operating system... The job is still finance, but more of the job now is designing how finance gets done." a16z's @seemaamble, @IvanoMakSF, and David Borecky on why you need a new CFO: https://www.a16z.news/p/you-need-a-new-cfo