10 MISTAKES OWNERS MAKE WHEN SELLING THEIR BUSINESS
You Wouldn’t Walk Into a Courtroom Unprepared. So Why Sell Your Business That Way?
The 10 mistakes that quietly turn a great exit into a painful one — and how to avoid them.
You would never walk into a courtroom without knowing your case, a board meeting without knowing your numbers, or a marathon without months of training. Yet most business owners walk into the single biggest financial event of their lives — selling the company they spent decades building — with no plan at all.
A trial lawyer preps witnesses for weeks before opening arguments. A CEO rehearses the earnings call until every figure is second nature. None of them show up and improvise, because they know the outcome of that one day is decided by everything they did beforehand. Selling a business works exactly the same way.
I have spent my career sitting across the table from business owners at the single most consequential moment of their financial lives: the day they sell the company they built. Some walk away with a multimillion-dollar exit and a clear conscience. Others walk away with a smaller check, a bigger tax bill, and a nagging sense that they left something on the table.
The difference is preparation. Selling a business is not just a transaction — it is the final act of a plan you should have started building years earlier. Here are the ten mistakes I see owners make again and again, and what to do instead.
✅ THE 10 MISTAKES THAT COST OWNERS THE MOST
1. Starting the process two months before closing
The most expensive mistake is also the most common. Owners decide to sell, call a broker, and expect a clean exit in ninety days. Real value gets built in the three to five years before a letter of intent, while you still have time to do things that will increase your business value like diversify your customer base, clean up your financials, and build a real management team. If your exit timeline is shorter than your improvement timeline, the buyer captures the upside, not you.
2. Treating tax planning as a closing-day event
By the time the purchase agreement is drafted, most of your tax planning options are gone. Qualified small business stock, an F reorganization, a trust holding part of your equity, an installment sale, a charitable remainder trust — all of these have holding-period and ownership requirements.
Ask early, and the tax savings can dwarf every fee you pay.
Ask late, and you write a check to the government instead.
3. Confusing purchase price with what you keep
Owners fixate on the headline number. Buyers negotiate the structure. Escrows, earnouts, seller notes, working capital adjustments, rollover equity, and non-compete allocations all determine how much of that headline you take home and when. An eight-figure deal can deliver less cash at closing than a smaller, cleaner one. Model your after-tax, after-adjustment proceeds before you fall in love with a purchase price number.
4. Being the business
If every key relationship, pricing decision, and technical judgment runs through you, you haven’t built a company — you’ve built a job with an owner-dependency discount attached. Buyers pay premiums for businesses that keep performing after the founder leaves. Delegating real authority isn’t an operational nicety. It’s a valuation strategy.
5. Neglecting the quality of the financial record
Due diligence is where deals die or are discounted. Commingled personal expenses, inconsistent revenue recognition, missing contracts, and a general ledger nobody can reconcile all tell a buyer the same story: the company is a risk. A quality-of-earnings review and a properly organized data room cost far less than the price reduction a nervous buyer will demand.
6. Ignoring the legal housekeeping
Un-assignable customer contracts, expired leases, unregistered intellectual property, missing minute books, and an operating agreement whose transfer provisions contradict your plan. Every one of these becomes a due diligence exception, and every exception becomes leverage for the buyer. Fixing them before you go to market costs a fraction of what it costs mid-deal.
7. Negotiating with only one buyer
A single interested party is not a market; it’s a monopoly on your outcome. Owners who accept an unsolicited offer without testing the field routinely discover afterward that a competitive process would have produced a higher price, a shorter earnout, and a smaller escrow. Competition is the cheapest negotiating tool you will ever buy.
8. Failing to align the family and the ownership group
Deals unravel when a minority shareholder objects, a spouse discovers the plan at the eleventh hour, or a child who expected to inherit the business learns it’s being sold. Buy-sell agreements, voting arrangements, and estate plans all need to be reviewed well in advance. The legal documents matter, but so does the conversation. Have it early, and have it honestly.
9. Assuming your advisors are interchangeable
Your longtime generalist attorney and the accountant who has prepared your returns for twenty years are valuable — and they may never have closed a transaction like yours. A sale demands a deal team: transactional counsel, a tax specialist, an investment banker who knows your industry, and a wealth advisor ready for the liquidity event. The cost of that team is may be expensive and is measured in fees. But the cost of not having a strong deal team may cost you even more in the amount you take home.
10. Planning the exit without planning the life after it
This is the mistake nobody warns you about. Owners spend thousands of hours negotiating a sale and almost no time deciding what the money is for, or how the proceeds fit into their estate and charitable goals. Decide what the exit is funding before you sign, not after.
The Common Thread
Every mistake on this list comes from the same root cause: treating the sale as an event rather than the culmination of a system and process over time. The owners who exit well are the ones who built their businesses to be transferable long before they intended to transfer them — governance, management succession, financial rigor, legal hygiene, tax positioning, and personal planning, all addressed as one integrated program instead of a series of emergencies.
You do not need a buyer at the table to start. Start today and run your business every day as though a sophisticated buyer will examine it — because someday, one will.