One of the most expensive suppliers in a mid-market business is often a firm nobody has a single contract with.

The controller pulled the accounts payable file last quarter, sorted it by supplier instead of by cost centre, and found one advisory firm sitting in three of them. Marketing had engaged it on a brand project. Operations had engaged it on a process review. The finance team's own systems upgrade carried a third engagement letter. Each one sat below the approval threshold, each was signed by someone with a real problem and a reasonable instinct, and none of the three people knew about the other two.

That is how professional services get bought. Legal, advisory, audit support and consulting arrive one problem at a time, brought in by whoever has the problem, so the category never assembles as a category. The day rates differ between engagements, the scopes overlap, and the firm quotes each buyer separately with no reason to mention who else down the corridor is already paying it.

Her CFO had assumed someone was watching it. Someone was watching each engagement, which is not the same as watching the firm.

Nothing in this needs a programme. It needs the total in one row, with a name beside it. Once the sum is visible, the rates, the overlap and the renewal dates become questions a person can ask, and a conversation about the whole relationship looks nothing like three conversations about three projects.

That firm has three engagement letters and one supplier record, and nobody has yet read them together.

The freight renewal sat on the agenda for a few minutes, between the insurance update and the lease review, and nobody asked a question.

The category manager said what he always says. "We negotiated that one properly. It's handled." He believes it, and so does the CFO, partly because she remembers the original negotiation as a good one and partly because the alternative is a conversation nobody has time for.

"The only asset in this business never tested for impairment is the person signing off the impairment tests."

The instinct behind that sentence has real grounds. A team that has run a category for years knows its suppliers, the relationship has been steady, and reopening the price implies that someone was careless. A CFO with larger problems on the desk is right to spend attention elsewhere, and the rate was a good one on the day it was signed.

Two renewals later, the same rate sat in the same file. Untouched.

A signed rate records a judgement made at one moment, and every invoice since has confirmed it simply by matching it. Nobody is searching for drift. They are checking that the deal is being honoured, which is a different search entirely, and the supplier, who prices for a living and has watched this customer renew without a question, has no reason to volunteer the gap. Freight, telecommunications, insurance and cleaning all behave this way in a mid-market business: the longer nobody tests them, the more a quiet premium starts to look like the market rate.

So take a narrow question into the next review. When was this category last tested against the market, by someone with no stake in the answer, and on the full cost across the contract life rather than the headline price? If the honest answer is "when we signed it", the rate is not competitive. It is unexamined. Those are different problems.

The CFOs who hold their margin through a downturn are the ones who tested their rates before anyone asked them to.

The freight renewal comes round again next quarter, and the category manager will say it is handled.