Selling a business is one of the most consequential events in any entrepreneur’s life. Yet most founders who go through it describe the experience as unlike anything they imagined — longer, more invasive, more emotionally draining, and procedurally far more complex than they anticipated. The purpose of this guide is to give you a clear, plain-English picture of what a typical mergers and acquisitions transaction actually looks like from start to finish: who is involved, what they do, what you will be asked to provide, and how each stage builds toward the moment when the wire transfer hits your account.
Understanding the process in advance does more than reduce anxiety. It allows you to prepare your business before buyers arrive, to recognize when something in a deal is off-track, to ask better questions of your advisors, and to make decisions from a position of knowledge rather than confusion. With that in mind, here is how a deal actually unfolds.
The Players: Who Is Sitting at the Table
Before walking through the timeline, it helps to understand who the major participants are, because each one plays a distinct role and you will be dealing with all of them simultaneously at various points.
On your side of the table, you will typically have an investment banker (also called an M&A advisor or business broker, depending on the size of the deal), a transaction attorney, and an accountant or CPA with M&A experience. Your investment banker manages the sale process, runs the marketing effort, and negotiates deal terms on your behalf from a commercial perspective. Your transaction attorney drafts and negotiates the legal documents, advises you on legal risk, and ultimately represents your interests in the purchase agreement. Your accountant helps structure the deal for tax efficiency, prepares financial information the buyer will need, and helps you understand what you will net after taxes. You may also have a financial advisor or wealth manager helping you think about what to do with the proceeds.
On the buyer’s side, you will encounter a mirror image of that team. Strategic buyers — meaning companies that operate in your industry and want to acquire you for operational reasons — typically have in-house M&A teams supported by outside counsel. Financial buyers, such as private equity firms, are professional acquirers who do many deals per year. They often move faster, ask more pointed questions, and have highly polished deal teams. Both types of buyers will hire their own attorneys, accountants, and sometimes specialized consultants to dig into your business.
Throughout the process, you will also encounter a variety of third parties: quality of earnings accountants hired by the buyer to audit your financial statements; environmental consultants if your business has any real property exposure; industry experts who may conduct customer interviews; and lenders, if the buyer is using debt financing, who have their own diligence requirements. It is not unusual for a mid-market deal to involve dozens of people across multiple firms working simultaneously on different aspects of the same transaction.
Stage One: Preparation and Positioning
The work of selling your business begins long before any buyer hears your name. If you are working with an investment banker, the engagement typically starts with a period of several weeks during which your banker learns your business in depth. They will conduct extensive interviews with you and your management team, review your financial statements, study your customer base and contracts, and analyze your competitive position. The goal is to understand what makes your business valuable and to anticipate the questions buyers will ask.
From this work, your banker prepares two key marketing documents. The first is a teaser — a one or two-page anonymous summary of your business that can be sent to prospective buyers without revealing your identity. The second is the Confidential Information Memorandum, often called the CIM or the book. This is a detailed document, typically between twenty and sixty pages, that describes your business, its history, its financial performance, its management team, its customers, its market position, and its growth opportunities. Writing a compelling CIM is a genuine craft, because it must be accurate while also presenting your business in its best light.
During this preparation phase, your transaction attorney will also begin reviewing your corporate records to identify any legal issues that need to be resolved before buyers arrive. This might include cleaning up your cap table, making sure your intellectual property is properly assigned to the company, verifying that your key contracts do not contain problematic change-of-control provisions, and ensuring that your corporate governance documents are in order. Arriving in due diligence with clean records saves time and often saves money.
Stage Two: Marketing the Business and Initial Buyer Outreach
Once the marketing materials are ready, your banker begins reaching out to prospective buyers. Depending on the process, this might be a broad auction in which dozens of buyers receive the teaser, or a targeted process in which your banker approaches a curated list of strategic and financial buyers who are most likely to see value in your specific business. Both approaches have advantages and tradeoffs, and the right choice depends on your industry, your size, how much confidentiality matters to you, and how urgently you want to close.
Interested buyers sign a Non-Disclosure Agreement, or NDA, before receiving the CIM. The NDA is a legal contract that prohibits the buyer from sharing your confidential information with third parties and from using it for any purpose other than evaluating a potential acquisition. NDAs are standard, but they are not identical, and your attorney should review them carefully. The scope of the confidentiality obligation, the duration, and any carve-outs matter — particularly if you are concerned about a strategic buyer who is also a competitor learning details about your business and then walking away without buying.
After receiving the CIM, interested buyers are asked to submit an Indication of Interest, or IOI. This is a non-binding letter in which the buyer states a preliminary valuation range and describes the broad outlines of how they would structure a deal. IOIs are intentionally high-level and carry no legal weight, but they serve an important filtering function: they let your banker identify which buyers are genuinely interested, what price range they are contemplating, and whether any structural issues are likely to arise.
Stage Three: Management Presentations and the Letter of Intent
After reviewing IOIs, your banker helps you select a group of buyers — typically between three and eight — to advance to the next stage. These buyers are invited to a management presentation, which is usually a half-day or full-day meeting at which you and your key executives present the business in detail and answer the buyer’s questions. Management presentations are critically important. They give the buyer a chance to assess you as a leader and to develop confidence that the business can be successfully transitioned. How you present yourself, how well you know your numbers, and how you handle hard questions all influence the buyer’s perception of risk.
Following the management presentations, qualified buyers are invited to submit a Letter of Intent, or LOI. The LOI is a more detailed document than the IOI and contains the buyer’s proposed price, deal structure, key terms, and a request for an exclusivity period during which only they can negotiate with you. While most of the LOI is non-binding, certain provisions — particularly the exclusivity clause and the no-shop provision — are binding and highly significant. Signing an LOI that gives a buyer sixty or ninety days of exclusive access to you means you cannot negotiate with anyone else during that time, even if the deal deteriorates or new information emerges. Selecting which LOI to accept and negotiating its key terms is one of the most important decisions in the entire process.
Stage Four: Due Diligence
Once an LOI is signed, the deal enters due diligence — and this is where the real work begins. Due diligence is the buyer’s systematic investigation of everything you told them about your business. They want to verify that the financial results are accurate, that the customers are real and contractually committed, that the intellectual property is owned by the company, that there are no undisclosed liabilities, that the employees are properly classified, and that dozens of other factual claims you made in the CIM and in conversation are true.
Most deals use a virtual data room, which is a secure online portal into which you upload thousands of documents — financial statements, tax returns, contracts, leases, employment agreements, corporate records, insurance policies, litigation history, and much more. The buyer’s team, their lawyers, and their accountants all work through the data room simultaneously, generating requests for additional information as they go. A typical mid-market transaction will see hundreds of individual diligence requests by the time the process concludes.
The buyer will also conduct a Quality of Earnings analysis, commonly called a QofE. This is a financial audit conducted by an accounting firm the buyer hires specifically for this purpose. The QofE examines your financial statements in granular detail, looking for adjustments that might change the picture of your business’s profitability — one-time revenues, owner perks that run through the business, revenue recognition issues, changes in working capital, and similar items. The QofE often produces a normalized EBITDA figure that differs from what you and your banker presented to buyers, which can create tension and sometimes affects the final price.
As the founder, you will be heavily involved throughout due diligence. You will need to respond to information requests promptly, prepare for and attend calls with the buyer’s advisors, explain anomalies in your financial records, and provide context for anything the buyer finds surprising. This is exhausting work that occurs simultaneously with running your business. One of the most common mistakes founders make during this period is allowing the business to underperform because they are too distracted by the deal. Buyers are watching your current-period results throughout diligence, and a sudden drop in revenue or profit can trigger a renegotiation or even a deal collapse.
Stage Five: Negotiating the Definitive Agreement
While due diligence is underway, the attorneys on both sides begin drafting and negotiating the definitive purchase agreement. In an asset sale, this is typically an Asset Purchase Agreement. In a stock sale or merger, it is a Stock Purchase Agreement or a Merger Agreement. This document, which often runs to one hundred pages or more, is the legally binding contract that governs the transaction in detail.
The purchase agreement contains the final purchase price and any adjustments to it, the representations and warranties each party is making, the indemnification obligations that apply if any of those representations turn out to be false, the closing conditions that must be satisfied before the deal can close, the post-closing covenants that govern what each party must and cannot do after closing, and numerous other provisions. Negotiating this document is where a skilled transaction attorney earns their fee, because the specific language of every clause can have real economic consequences for you years after the deal closes.
Key negotiating points typically include: the survival period for your representations and warranties (how long the buyer can come back to sue you for breach); the size of the indemnification basket and cap (how much must go wrong before you owe anything, and the maximum you can owe); whether you are required to put money in escrow as security for your indemnification obligations; whether the deal involves earnout payments tied to future performance; the definition of the working capital target used to adjust the purchase price; and the scope and duration of any non-compete obligation you must accept.
Stage Six: Regulatory Approvals and Pre-Closing Conditions
Depending on the size of the deal and the industries involved, the transaction may require regulatory review before it can close. The Hart-Scott-Rodino Antitrust Improvements Act, commonly called HSR, requires parties to large transactions to notify the Federal Trade Commission and the Department of Justice and to observe a waiting period before closing. In 2024, the HSR filing threshold was approximately $119.5 million, though the thresholds adjust annually. Deals that raise competition concerns — for instance, because the buyer and seller are direct competitors — may face extended review or require divestitures as a condition of approval.
Other regulatory requirements can include industry-specific approvals (for example, in banking, insurance, telecommunications, or healthcare), CFIUS review if the buyer has foreign ownership and the business operates in a sensitive sector, state-level regulatory approvals, and third-party consents required by key contracts. Identifying these requirements early in the process prevents delays at closing. Your attorney should conduct a thorough consent and approval analysis at the outset of the engagement.
Stage Seven: Closing
When diligence is complete, the purchase agreement is fully negotiated, and all closing conditions are satisfied, the deal closes. In the modern era, most closings are conducted electronically — documents are signed via DocuSign or similar platforms, funds are wired, and the parties exchange closing deliverables without needing to be in the same room. Your attorney will prepare a closing checklist that tracks every document and step required to consummate the transaction, and the parties work through that checklist in the days leading up to closing.
On the day of closing, you execute the purchase agreement and numerous ancillary documents — an officer’s certificate, a secretary’s certificate, stock certificates or assignments of interest, assignment and assumption agreements, and whatever transition documents the deal requires. The buyer wires the purchase price to an account designated by you or your attorney. A portion of the purchase price is typically held back in escrow to secure your indemnification obligations. Once everything is signed and the wire is confirmed, the deal is done.
How Long Does All of This Take?
From the beginning of the marketing process to closing, a typical middle-market M&A transaction takes between four and nine months. The preparation phase usually takes four to eight weeks. Marketing and management presentations take another six to twelve weeks. LOI negotiation is usually quick — one to three weeks. Due diligence and purchase agreement negotiation together typically take sixty to one hundred twenty days. Regulatory approvals, if required, add additional time on top of that.
Founders frequently underestimate how long the process takes and how demanding it is. Planning for at least six months, building a strong internal team so the business continues to run while you are focused on the deal, and working with experienced advisors who keep the process moving are the most effective ways to manage the timeline.
What Will Be Asked of You Throughout
Selling your business requires a sustained personal commitment that goes far beyond simply saying yes to a deal. During the preparation phase, you will spend significant time being interviewed by your banker and helping to write the CIM. During marketing, you will prepare for and participate in management presentations. During due diligence, you will respond to hundreds of information requests, explain your business in granular detail, and attend calls and meetings with the buyer’s team. During purchase agreement negotiation, you will make dozens of business decisions about risk allocation and deal terms. Throughout the entire process, you must continue to run the business well.
The founders who have the best outcomes are those who invest heavily in preparation before the process starts, assemble excellent advisors, delegate effectively to their management teams so the business does not suffer during the process, and approach negotiations with patience and discipline. The sale of a business is not a sprint — it is a marathon, and the founders who understand that from the beginning are far better positioned to cross the finish line on favorable terms.