Sell Your Business: The Complete Process From Prep to Close

Selling a business is usually described as a sequence of stages, but from the owner's side it is really a sequence of six decisions: whether to use a broker, what to ask, who to tell, which offer to accept, what to concede in diligence, and how long to stay afterwards. Each has a cost attached if you get it wrong, and the expensive ones come early. The stages take six to nine months; the decisions take minutes and determine most of the outcome.

Selling a business runs from preparation through valuation, confidential marketing, offer negotiation, due diligence, and closing, typically over six to nine months. At each stage the owner faces one decision that materially affects the outcome. The earliest decisions — whether to engage a broker and what price to ask — carry the largest consequences and the least available information.

QUICK ANSWER

Six to nine months, six real decisions. The two that cost the most are made in the first month, before you have seen a single buyer, which is why owners who prepare in advance consistently do better than owners who react.

Key Takeaways

• The process is six to nine months; the decisions that shape it are made in minutes.
• Pricing and representation are decided first and matter most.
• The highest offer is frequently not the best one, once structure is accounted for.
• Missouri adds its own closing requirements, including tax clearance before transfer.

There is no shortage of articles listing the stages of a business sale. They are accurate and mostly unhelpful, because knowing that due diligence follows the letter of intent does not tell you what to do when you are in it.

What follows is the same process organised around the decisions you will actually face, in the order they arrive, with the cost of each mistake attached. Whether you work with business selling professionals in St. Louis or run the sale yourself, these six choices are yours to make.

Decision 1 — Why Use a Broker to Sell a Small Business in St. Louis?

This one comes first and frames everything after it.

The case for handling it yourself is straightforward: you save the commission, and you know your business better than anyone. The case against is less obvious. A sale requires a pool of screened buyers, and building one from scratch while still running the company is the part owners consistently underestimate. Confidentiality is the other half — marketing a business without revealing which business it is takes structure.

Cost of getting it wrong: an unrepresented sale often means fewer competing buyers, and competition is what moves price. The IBBA and M&A Source Market Pulse Survey found that in the first quarter of 2026, 83% of deals above $5 million drew at least three offers, with sale-to-asking ratios for smaller deals sitting near 88%. A single interested buyer sets the price; three set a market.

Decision 2 — What Number to Ask

Made in month one, felt for the following nine.

Overpricing does not simply delay a sale, it damages it. Buyers watch how long a listing has been available, and a business that sits for months and then reduces its price looks like one with a problem. The reduced price then gets negotiated down from, not up.

Cost of getting it wrong: months of silence followed by a lower net result than accurate pricing would have produced on day one. A professional business valuation gives you a number with evidence behind it, which also matters later when a lender orders their own appraisal.

Decision 3 — Who to Tell, and When

Confidentiality is not paranoia. It protects the thing you are selling.

Once employees, customers, or competitors learn the business is for sale, staff start looking, customers start hedging, and competitors start calling your accounts. If the first deal then falls through, you have damaged the business and still own it.

Cost of getting it wrong: value erosion that does not reverse. Most owners tell their team only after due diligence clears and closing is near certain, and that is the right instinct.

Decision 4 — Which Offer to Accept

The highest number is not reliably the best deal, and this is where inexperience is most expensive.

• How much is cash at closing versus a seller note paid over years
• Whether any portion depends on the business hitting future targets
• How long you are required to stay, and on what terms
• Whether the buyer's financing is realistic — and whether they have spoken to a lender at all

Most acquisitions in this size range rely on SBA  7(a) financing, which generally requires a 10% equity injection and takes 60 to 120 days from a complete application. An offer from an unfinanced buyer is not really an offer. Confirm current requirements with a lender, since SBA rules were revised during 2025 and 2026.

Cost of getting it wrong: accepting a headline number that pays out over five years from a buyer who cannot secure funding, having declined a lower all-cash offer in month five.

Decision 5 — What to Concede in Due Diligence

Thirty to sixty days of the buyer verifying everything you have said, while their lender runs a parallel review.

Requests will arrive that feel intrusive, and some of them are. The judgement call is which findings genuinely warrant a price adjustment and which are negotiating posture. Owners who disclosed their problems up front have far more standing here, because nothing being uncovered is a surprise.

Cost of getting it wrong: either conceding on every point and watching the price erode, or refusing on principle and losing a buyer over something minor.

Decision 6 — How Long You Stay

Most agreements include a transition period of 30 to 90 days. Some buyers want considerably longer, particularly where the business has depended on you.

This is negotiable, and it is worth negotiating properly rather than agreeing in principle and resenting it later. A longer transition can justify a higher price. It can also mean a year of working for someone else in the company you built.

Closing in Missouri

Once the decisions are made, the closing itself is procedural — but Missouri adds requirements that are easy to leave too late:

• Filings with the Missouri Secretary of State, which vary depending on whether the transaction is structured as an asset sale or a share sale
• Clearance and final returns with the Missouri Department of Revenue. Buyers commonly require evidence that no tax is outstanding, because unpaid sales tax can follow the business to its new owner
• Liquor licence transfers through the Division of Alcohol and Tobacco Control, which do not move automatically with the business
• Local business licences, which differ across St. Charles County, St. Louis County, and the City of St. Louis
• Lease assignment, requiring landlord consent and frequently the last item to land

The Six Decisions at a Glance