Inside a Big Four firm, the work of preparing tax memos, reviewing regulations, and drafting client advice is increasingly being handed to AI systems running quietly in the background.

KPMG is embedding an AI system into the software 276,000 employees use for client work

The accounting giant is wiring Anthropic's Claude directly into the platform that handles its global tax work. All 276,000 employees in 138 countries will get access. This is bigger than another corporate AI announcement — KPMG is not handing employees a chatbot to play with on the side.

It is rebuilding the platform that handles client work around an AI — and raising real questions about accuracy, accountability, and who actually does the math.