Mistakes Founders Make When Selling Their Company: How to Protect Deal Value and Net Proceeds

Building a successful business requires years of relentless focus, but negotiating an exit demands a completely different set of skills. The process of selling a business presents numerous financial and strategic pitfalls, and even experienced entrepreneurs can make critical errors during a transaction.

Avoiding the common mistakes founders make when selling their company can materially affect how much of the sale price you keep, whether through avoidable taxes, unpaid earn-outs or unfavorable deal terms. This guide explores the most frequent structural and strategic missteps founders make during an M&A exit and outlines ways to help protect the value you have built.

1. Focusing Exclusively on Headline Purchase Price Over Net Liquid Proceeds

A common mistake founders make when selling their company is confusing the gross valuation number in a term sheet with actual cash in the bank. Deal structures can raise the headline purchase price while shifting risk back onto the seller.

• Paper Wealth vs. Realized Cash: Term sheets often blend cash at close with non-cash or deferred elements such as buyer stock, seller notes, or contingent earn-outs. Treating these deferred or contingent elements as equivalent to cash at close overstates what you are likely to receive.
• The Earn-Out Trap: Agreeing to a large earn-out based on aggressive post-sale growth projections can leave part of your payout dependent on how a buyer, rather than you, runs the business after closing.
• Unmanaged Working Capital Adjustments: Failing to agree the working capital target (the “peg”) and how it will be calculated early, ideally in the letter of intent, can lead to purchase price reductions in the post-closing working capital true-up.

Key Takeaway: Always evaluate a purchase offer on its net cash proceeds after adjusting for taxes, escrows, transaction fees, and probability-weighted deferred payments.

2. Neglecting Pre-LOI Tax Planning and Estate Structuring

Waiting until a Letter of Intent is signed to consider personal tax positioning is another common oversight. Once exclusivity is granted and deal terms firm up, your flexibility to restructure equity or use federal and state tax planning opportunities narrows considerably.

• Overlooking the Section 1202 QSBS Exclusion: Section 1202 can allow eligible non-corporate shareholders of a qualifying C corporation to exclude a substantial amount of gain from federal income tax: up to the greater of $10 million or 10 times basis for stock issued on or before 4 July 2025, and the greater of $15 million or 10 times basis for stock issued after that date. Eligibility turns on facts fixed long before a sale: the shares must have been acquired at original issuance; the company must meet gross-assets and active-business tests, and many service businesses are excluded; and the shares must be held more than five years (stock issued on or before 4 July 2025) or at least three years for a partial exclusion (stock issued after that date). Some states, including California, do not follow the federal exclusion.
• Late Estate Planning Transfers: Transferring equity to trusts such as Grantor Retained Annuity Trusts (GRATs) or Spousal Lifetime Access Trusts (SLATs) once a sale is effectively agreed can backfire. Under the anticipatory assignment-of-income doctrine, courts have taxed donors on the gain from shares they gave away when the sale was already virtually certain, for example in Ferguson v. Commissioner (9th Cir. 1999) and Estate of Hoensheid v. Commissioner (T.C. Memo. 2023-34), both involving gifts of stock to charity shortly before a sale. Transfers are best completed well before deal terms are settled.
• Overlooking State Tax Domicile Rules: Selling while resident in a high-tax state can mean significant state income tax on the gain. A genuine change of domicile before a sale can reduce that tax in some cases, but states closely scrutinize moves made shortly before a large sale, and a move generally does not avoid state tax on gain from an asset sale, which is sourced to the states where the business’s assets are located. Some trust strategies are also restricted. New York and California tax incomplete-gift non-grantor (ING) trusts as if the founder still owned the assets.

3. Running a Single-Buyer Negotiation Instead of a Competitive M&A Process

Entering exclusive negotiations with a single strategic or private equity buyer can reduce your negotiating leverage. A buyer that knows it is the only party at the table has less reason to concede on terms.

• Loss of Negotiating Leverage: Without alternative suitors, it is harder to push back on restrictive indemnities, long escrow holdbacks, or high indemnification caps.
• Exclusivity Drag: Once an exclusivity agreement is signed, time tends to work in the buyer’s favor. Prolonged due diligence can lead to fatigue and give a buyer an opening to renegotiate the price (a “re-trade”) before the definitive agreement is signed.
• Inadequate Advisory Representation: Attempting to handle buyer negotiations without experienced M&A advisers and legal counsel can result in accepting terms less favorable than those commonly negotiated.

4. Allowing Operational Performance to Slip During Due Diligence

The M&A process is an intense full-time job that can distract management from running the day-to-day business. A drop in financial performance during due diligence can lead a buyer to reprice the deal or walk away.

• Diligence Fatigue: When key executives focus entirely on data requests, operational momentum can slow, contributing to missed quarterly revenue targets or customer churn.
• Price Re-Trades: If financial results dip during the diligence window, buyers gain leverage to request price reductions or demand larger earn-out allocations.
• Inadequate Data Room Preparation: Assembling financial records and contract documentation reactively can create delays and may signal weak financial controls to prospective buyers.

Securing Your Legacy Through Strategic Exit Planning

Selling your business is a milestone event that requires careful coordination across legal, financial, and personal wealth disciplines. By identifying the common mistakes founders make when selling their company well in advance, you can approach the transaction process with leverage, help protect your net proceeds, and plan your transition into your post-exit chapter.

Planning an exit or liquidity event within the next 1 to 3 years? Contact us to discuss how our advisory services may be relevant to your situation. 

Important Disclosures

This material is provided for informational and educational purposes only. It does not constitute investment, legal, tax, accounting, or estate-planning advice and should not be relied upon as such. The strategies described involve complex tax and legal rules, may not be suitable for every individual or situation, and should be evaluated with your own tax, legal, and financial advisers. Nothing in it is an offer to sell or a solicitation of an offer to buy any security. Receipt of this material does not create an advisory or client relationship. An advisory relationship is established only upon execution of a written agreement.

Information is as of October 28, 2026, and is subject to change without notice. Tax law in particular changes frequently. Statements about future events or market conditions are forward-looking and may prove incorrect. There is no guarantee that any strategy will achieve its objective or reduce tax liability. Past performance does not guarantee future results. All investing involves risk, including the possible loss of principal.

Calado Capital is a state registered investment adviser. Registration does not imply a certain level of skill or training. Additional information about Calado Capital, including its Form ADV Part 2A brochure, is available at adviserinfo.sec.gov.