Common seller mistakes in an M&A negotiation

The founder who negotiates the sale of their company without preparation often makes mistakes that cost time, credibility, or closed value. The most frequent: price expectations out of line with the market, delivering information late or incomplete, and focusing only on price without negotiating the consideration structure. This note describes those mistakes and how to avoid them.

Why do misaligned price expectations hurt the negotiation?

The seller who asks for 10x or 15x normalized EBITDA when the Mexican SME market pays 3x–5x enters the negotiation with the buyer in irreconcilable positions. The buyer concludes the seller does not know the market or is not serious; the seller feels lowballed. The result is usually a break or a very long process. The defense is to align expectations up front: a valuation diagnosis or advisor who explains multiple ranges by sector and size, and what drives the price down. More in why many founders ask for 10x–15x and the market pays 3x–5x.

Why is delivering data late or incomplete a mistake?

The buyer needs the CIM, the data room, and answers to diligence questions on reasonable timelines. When the seller takes weeks to open the data room, answers in half measures, or does not disclose known risks until diligence finds them, they lose credibility. The buyer assumes there are more surprises or that the seller is not committed. Standard practice is to disclose proactively in the CIM what the buyer will find in diligence and to have the data room in order before signing the LOI. The guide to preparing the data room and the post on what due diligence uncovers detail how to prepare.

Why does negotiating only price and not consideration structure hurt the seller?

Nominal price (enterprise value) is one part; the other is how it is paid: cash at closing, seller note, earn-out, adjustment mechanisms. A seller who demands “all at closing” may find no willing buyer or receive lower offers because the buyer cannot or will not put 100% in cash. Negotiating the structure — rate and term of the note, earn-out targets, working capital adjustment mechanisms — allows deals to close that otherwise would not and often improves total value received when the note pays interest and the earn-out is achieved.

What other mistakes do sellers often make in the negotiation?

Frequent mistakes:

• Treating the LOI as “non-binding” and changing their mind on terms already agreed.

• Not defining exclusivity and timelines in writing and then complaining the buyer is slow.

• Mixing emotion with numbers (“my company is worth more because I built it”).

• Negotiating without an advisor when the buyer has an experienced team.

A seller who knows the process, has aligned expectations, and delivers information on time negotiates from a much stronger position. The guide to negotiating with an institutional buyer develops strategies and dynamics in that type of negotiation.