Fake or inflated revenue is the most expensive trap in buying a small business, because a buyer who pays for profit that does not exist has overpaid from the very first day.

The single most reliable check is also the simplest: claimed revenue must appear as real deposits in the business bank account, and any gap between the two needs a documented explanation.

Other warning signs include growth spikes with no cause, revenue concentrated in a few customers or a single month, and a seller who refuses live access to payment processors or accounting software.

When several warning signs appear together, the safest move is to discount the price heavily or walk away, since a good deal never requires you to ignore evidence.

This additional check rounds out the picture and helps you act with confidence rather than guesswork.