The most common mistakes when selling a company

Reading time
5 minutes
Date
Jul 24, 2026
Author
Murilo Oliveira — Partner, igc Partners
The mistakes that cost the most when selling a company are not technical: they are mistakes of preparation and process. Accepting the first interested party without testing the market, starting without getting the house in order and negotiating only the price are among those that most erode value. Knowing them beforehand is the cheapest way to avoid them.

Which mistakes happen even before starting?

Several of the most expensive mistakes are made before the first conversation with a buyer. The first is starting without preparation: disorganized financial information, unresolved corporate matters, unmapped contingencies and a lack of governance lengthen the process, give the buyer ammunition and weaken the seller's position. The second is not being clear about the reason for the sale, succession, liquidity, risk reduction, capital to grow, which makes it hard to assess whether a proposal meets the real objective or only the price.

A third common mistake is anchoring the price expectation in mega-deal headlines, which have little to do with the size and reality of the company. An expectation misaligned with the market hampers the negotiation from the start.

What is the most expensive mistake during the process?

It is accepting the first interested party without testing the market. A buyer who arrives before any structured process knows it has no competition and negotiates from that position: price, structure and conditions tend to be worse than they would be under competition. Without putting other qualified buyers at the table, the seller has no way of knowing whether what is being offered is good, because they have no benchmark. The absence of competition is, probably, the largest source of lost value in company sales.

Why is negotiating only the price a mistake?

Because the headline price is not what the seller receives. The structure, how much upfront and how much in installments, how much in a conditional earn-out, which guarantees and holdbacks, which indemnification obligations, defines the net value and the actual risk. An offer with a high price but a bad structure can be worth, in practice, less than an offer with a lower but clean price. Concentrating the negotiation only on the number, leaving the structure in the background, means giving up value that often exceeds the price difference.

What other oversights tend to cost dearly?

Conducting talks without confidentiality is one of them: exposing too early that the company is for sale can rattle clients, suppliers and staff and give an advantage to competitors, hurting the valuation. Another is neglecting business continuity during the process: letting results fall while the owner's attention turns to the sale weakens the position in the final stretch. There is also the mistake of facing due diligence reactively, solving problems under pressure instead of having anticipated them.

In practice: how do these mistakes appear and how are they avoided?

The most common scene is that of the buyer who knocks on the door with a proposal that seems good. The entrepreneur, with no benchmark, negotiates alone for months, in de facto exclusivity, and only discovers the cost of this when the price falls in due diligence or when they learn, too late, what another buyer would have paid. The way to avoid it is to turn the spontaneous offer into a trigger for a process: prepare the company quickly, map other qualified buyers and put the original proposal to compete. Another typical scene is that of the seller who accepts an aggressive earn-out to reach the desired number and, two years later, disputes metrics with the new controlling owner. The prevention is to negotiate objective metrics and management protections before signing, while there is still leverage.

What separates a well-conducted sale from a hurried one?

Process. A well-conducted sale starts from preparation, defines a strategy, creates competition among qualified buyers and negotiates the entire structure in the seller's favor, under confidentiality, from beginning to end. A hurried sale reacts to an isolated offer and leaves the most important decisions to the heat of the negotiation, exactly when the asymmetry against an experienced buyer weighs most against the seller. The difference between the two is usually measured in value.

igc's view on the mistakes sellers make

igc works exclusively on the sell-side and conducts the process end to end, with the partners leading the decisive stages. The objective is to eliminate the avoidable mistakes before they cost value: prepare the company, align the expectation with the market, build real competition and negotiate the complete structure, always under confidentiality.

Across more than 520 completed transactions, the pattern repeats: the sellers who most preserve value are those who prepared and tested the market, instead of reacting to an isolated offer.

Frequently asked questions

What is the most expensive mistake when selling a company?

It is usually accepting the first interested party without testing the market. Without competition, it is very hard to know whether the price and structure offered are the best available.

I received a spontaneous offer for my company. What do I do?

Treat the offer as a trigger for a process, not as a decision. Prepare the company, map other qualified buyers and put the original offer to compete. It is the only way to know whether it is really good.

Do I need to prepare the company even though I already have an interested buyer?

Yes. Preparation organizes information, anticipates due diligence points and strengthens your position, including in front of a buyer who has already shown interest.

Is negotiating a high price enough for a good sale?

No. The structure, installments, earn-out, guarantees, holdbacks, defines how much you actually receive and when. A high price with a bad structure can be worth less than it seems.