The Line Item That Isn't There

My teams build these things. And I can tell you what the invoice doesn't say.

When we deploy an AI agent for a client, the vendor economics look clean. Tokens, sessions, seats. The CFO can model it. What nobody models is what happens the first time the agent does something confidently wrong in the middle of a fifteen-step workflow. Because it won't throw an error, it'll just keep going. And by the time a human catches it, the cleanup is already three people deep.

I've watched this up close. A senior consultant spends two hours reconstructing what the agent decided and why. An engagement manager explaining to a client why the output they already acted on needs to be redone. That time doesn't show up anywhere. Not on our invoice to the client. Not on the vendor's invoice to us. It just disappears into the margin.

There's a concept getting traction right now called "hidden human cleanup costs." The idea is simple: every agent deployment has an intervention rate nobody is measuring, and even at a modest hourly cost, it compounds fast. What strikes me is how invisible it is on both sides of the table. The vendor doesn't measure it because it happens after the sale. The client doesn't measure it because it appears to be normal delivery friction. And we in consulting absorb it quietly because nobody wants to tell a client their AI pilot has a shadow labor cost attached to it.

That has to change. Not because it's a vendor problem (it's partly a vendor problem), but because if you can't name the cost, you can't manage it, and you definitely can't negotiate on it. Your ROI is in limbo until you can.