Paying for the five-minute fix

Why does a repair that took five minutes feel overpriced when the same fee for a full day would not?

The engineer arrives, listens for a moment, tightens something you did not know existed, and the machine runs. Four minutes. The bill is the same as it would have been for a day, and something in you objects.

Notice how odd the objection is. You got the outcome you wanted, faster and with less disruption than you feared: by any account of what you were buying, this was the best possible visit. So the complaint cannot be about value received. What is it about?

Start with what the price is attached to. You did not want four minutes of someone's time — you can have four minutes of almost anyone's time very cheaply. You wanted the machine working. Those four minutes were worth what they were worth because they were the right four minutes, and the difficulty was never in the tightening. It was in knowing which thing to tighten.

That is the whole reversal. The visible act is the trivial part of the service, and the valuable part — the diagnosis — is invisible by its nature, because a correct diagnosis looks exactly like no work at all. The folk version is the old bill attributed to an engineer called in over a failing machine: one dollar for the chalk mark, and nine thousand nine hundred and ninety-nine for knowing where to put it. The story is almost certainly apocryphal, and survives because it names something true.

Why does the objection feel so natural, then? Because we price things by visible effort. There is decent experimental evidence for this as a general habit of mind — people rate the same painting or poem more highly when told it took longer to produce. Effort is observable and outcome quality often is not, so effort becomes the proxy, and a proxy is exactly what gets used when the thing it stands for cannot be seen. The four-minute repair strips out the effort and leaves the fee standing there unaccompanied.

Now the supplier's side, because there is a real economic answer and not only a psychological one. The tradesperson's costs are not in that visit. They are in the years of exposure that built the ability to recognise the fault, the van, the tools, the unpaid travel, and — decisively — the other jobs. The same fee must cover the visit where an identical symptom turns out to be something else and eats an afternoon, and neither party knows in advance which sort this is. A price rising only with time on site would make the quick jobs unprofitable and the hard ones a lottery the tradesperson always loses.

And a full day at the same fee feels acceptable not because it is better value — it is usually worse — but because a day of visible labour supplies the justification you were looking for. Same money, same outcome, better feeling: a sign the feeling tracks something other than what you got.

Now the uncomfortable half, which deserves the same weight. What kind of good is this? Economists call it a credence good: one whose quality the buyer cannot judge even after consuming it. You cannot tell whether that adjustment was the right one, whether it was necessary, or whether a smaller intervention would have done. The machine runs, which proves only that the machine runs.

And this is the same fact seen from both sides. What justifies the fee — that the value lay in privately held diagnostic skill you cannot check — is precisely what makes overcharging easy and hard to detect. Field studies that take a device with a single known, trivial fault around many repair shops routinely find a substantial share diagnosing extra work. So the honest position is not "the five-minute fix is fairly priced" but "it is priced on a basis you have no way to audit, and that basis is sound in principle and abusable in practice".

The gap here is not between a fair price and an unfair one; it is between two theories of what is being sold. The customer's intuition prices labour. The tradesperson prices the ability to locate the fault, spread across all the jobs that ability gets used on. Both are coherent, and the second is what keeps a repair trade in existence.

That also explains a practice customers often resent and should not: the separate callout or diagnostic fee. Naming the diagnosis as its own line makes visible the thing actually bought and detaches it from the length of the visit. It looks like an extra charge and functions as an honesty device.

None of which resolves the verification problem, and nothing entirely does. What societies build instead are substitutes for checking: licences, warranties on the work, itemised parts, second opinions, the reputational cost of a customer who returns to find the same fault. These proxies work in proportion to how repeated the transaction is — which is why the roadside breakdown and the holiday-town garage, one-shot encounters with no reputation at stake, are where the abuse concentrates.

• Why guarantees on the work, rather than on the price, are the strongest signal a repairer can offer.
• What changes when the diagnosis is done by a machine that prints a fault code, and who then captures the value.

Every term the collection defines is gathered in the glossary.