The DIY Tax: A CFO's Guide to Sustainable AI in Accounting

The conversation has shifted from "should we invest in AI?" to "can we make this on our own?". Teams start building, and initial results are encouraging—then the month-end hits.

This guide provides a clear path to understanding the "DIY Tax"—the hidden operational and financial costs of DIY AI—and provides a roadmap for getting out of it. By the second close cycle, cracks appear; by the fourth, hidden costs often exceed the price of a purpose-built platform.

We share how to:

• Identify the six hidden costs of DIY AI, including key-person dependency, the auditability gap, and version fragility.
• Quantify the DIY Tax by accounting for infrastructure costs ($6,500–$18,600) and the necessity of a high-cost AI Admin.
• Meet new audit standards, specifically COSO Principles 7 and 16, which require immutable audit trails that most DIY builds lack.
• Analyze the three-year TCO to see how DIY costs compound over time while purpose-built platform costs stay flat.
• Evaluate your implementation model to ensure you are using experts with CPA-level knowledge who prioritize long-term team independence.

Your accounting close process can get unparalleled support from AI, and we’re here to show you how to ensure that support is sustainable and audit-ready.

The DIY Tax is a choice, not an inevitability.