What does an AI agent actually cost?

The AI is the cheap part. Here is where the money really goes, and the three numbers to ask any supplier for before you sign.

Most managers we meet expect the answer to be frightening. It usually isn't — but the money is not where people think it is, and a supplier who only quotes you the exciting number is leaving out the ones that matter.

The running cost is genuinely small

The AI itself is billed per use, like electricity. Reading a document and deciding what it is costs a fraction of a cent. Drafting a full page of text costs a few cents. For the volumes most small and mid-sized businesses have — hundreds of documents a day, not millions — the monthly AI bill for a working agent tends to land somewhere between a streaming subscription and a mobile phone contract.

To make that concrete with our own numbers: the research agent that drafts articles for this website costs us roughly ten cents per illustrated article, everything included. We publish that figure because it surprises people, and because a supplier who won't show you the equivalent number for your workload is asking you to budget blind.

Where the real money goes

Three places, in descending order.

The build. Connecting an agent safely to your email, your files or your accounting system — with its own credentials, a record of everything it does, and a human approval step where mistakes would be expensive — is skilled work, and it is most of what you pay for. Expect a first working system to cost a few weeks of professional time. Anyone quoting dramatically less is probably skipping the safety parts, and you will pay for those later, with interest.

The change. Someone has to adjust how the team works, retrain a habit or two, and be available in the awkward first fortnight. This costs time rather than invoices, which is why it gets forgotten — and unmanaged, it is the most common reason a perfectly good system ends up unused.

The keeping-it-working. Your business changes, suppliers change their document layouts, and the AI models themselves get updated. Left unwatched, agents drift — quietly, which is worse than loudly. Budget a modest monthly amount for someone to be watching, whether that's a retainer or your own staff time.

The three numbers to demand

Before you sign anything, ask for: the fixed price to build the first workflow; the expected monthly running cost at your volumes, in writing; and the hard spending cap — the ceiling the system cannot exceed no matter what goes wrong. That third one matters most. A budget enforced by the software's own architecture doesn't have bad days. If a supplier can't tell you where the cap lives, the honest answer is that there isn't one.

And the number that justifies all of it

Cost only means something against what the work costs you now. An employee spending ninety minutes a day retyping information costs you roughly a month of their year. Measure that first — ours is measured in a free review, but however you get it, get it — and the decision usually makes itself, in one direction or the other.