How to Buy a Business: The Complete Step-by-Step Guide
Buying an existing business is one of the fastest ways to become a business owner without starting from zero. You inherit revenue, customers, employees, and systems on day one, instead of building all of it from the ground up. It's also a longer, more document-heavy process than most first-time buyers expect, typically running six to twelve months from the day you start looking to the day you close.
This guide walks through the entire process in order: getting ready, finding the right business, evaluating it honestly, financing the deal, negotiating terms, surviving due diligence, and closing. Where we've covered a step in more depth elsewhere, we'll point you there.
Step 1: Decide What You're Actually Looking For
Before you look at a single listing, get specific about what kind of business you're actually trying to buy. "A profitable small business" is too vague to search effectively or evaluate quickly once you find something. Industry, size (revenue and SDE range), geography, and your role after close (owner-operator vs. semi-absentee) all narrow the search dramatically and save you from wasting months on businesses that were never a fit.
This is also the point to be honest about readiness: financially, operationally, and personally. We've written a full 10-question readiness assessment that's worth going through before you start. It catches gaps in financing capacity, industry experience, and family alignment that are much cheaper to find now than three months into a search.
Step 2: Get Your Finances in Order Before You Look
Most first-time buyers start browsing listings before they know what they can actually afford, then fall for a business they can't finance. Reverse the order.
Talk to an SBA lender or a few conventional lenders early, before you have a target business, to understand your realistic buying power. Lenders generally want to see a personal financial statement, decent personal credit, and some combination of relevant industry experience or management experience. Pre-qualification tells you your real budget, which determines which listings are even worth your time.
If you're planning to use SBA 7(a) financing, the most common route for buyers without an all-cash offer, know going in that it typically covers 70-90% of the purchase price, requires a personal guarantee, and usually asks for 10-15% equity injection from the buyer. Sellers carrying a note for part of the purchase price is common, and lenders often read it as a sign the seller believes in the business's future performance.
Step 3: Find Businesses for Sale
This is where most buyers spend the most time, often inefficiently. There are several distinct channels, and serious buyers typically use more than one simultaneously:
We've ranked and compared all six major methods for finding a business here, including realistic expectations for each. The core problem worth understanding upfront: no single source shows you everything. Listings get pulled quickly once buyers start engaging, and the best deals often move before a casual buyer even sees them. Buyers who move fast and consistently tend to check more sources, more often, than buyers who check one site occasionally.
Step 4: Screen Listings Before You Invest Time
Not every listing that matches your criteria on paper deserves a deep look. Before requesting financials or signing an NDA, do a quick pass:
This quick filter saves you real time, and eventually real diligence dollars, on businesses that were never going to work.
Step 5: Make Initial Contact and Sign an NDA
Once a listing clears your initial screen, you'll typically sign a non-disclosure agreement before the broker or seller shares real financials. This is standard and protects the seller's confidentiality; most sellers don't want employees, customers, or competitors finding out the business is for sale prematurely.
After the NDA, you should receive a Confidential Information Memorandum (CIM) or a financial package: typically 2-3 years of tax returns or financial statements, an add-back schedule explaining the seller's SDE calculation, and basic operational details. Read the add-backs skeptically. This is where sellers most commonly inflate the number buyers will value the business against.
Step 6: Make an Offer (Letter of Intent)
If the numbers hold up after your initial review, the next step is a Letter of Intent, or LOI: a non-binding document outlining your proposed purchase price, deal structure, financing contingency, and timeline for due diligence and closing. It sets the terms both sides negotiate toward, and backing out after signing without a legitimate diligence finding can damage your credibility with brokers on future deals.
A typical LOI includes purchase price and structure (cash, seller note, earnout), what's included (assets, real estate, inventory), an exclusivity period during which the seller agrees not to negotiate with other buyers, and a proposed timeline to close.
Step 7: Conduct Due Diligence
Due diligence typically covers three areas: financial, legal, and operational. More deals collapse here than at any other stage, usually because a number in the financial package doesn't hold up under scrutiny.
Financial diligence. Verify revenue and profitability against tax returns, bank statements, and merchant processing records where available, rather than relying only on the seller's summary package. Recalculate SDE yourself using conservative assumptions instead of accepting the seller's add-backs at face value.
Legal diligence. Confirm the business's legal structure, any outstanding liens or litigation, the status of licenses and permits, and whether the lease is actually transferable. Lease transferability should be confirmed directly with the landlord, not assumed from the seller's word alone.
Operational diligence. Understand customer concentration (a single customer representing 40% of revenue is a real risk factor), employee retention risk after a change in ownership, and how dependent the business is on the current owner's personal relationships and expertise.
This is also the stage where what the business is worth to you specifically matters. A business can carry different value for a buyer planning to bolt it onto an existing operation than for a first-time owner-operator, so diligence findings should be weighed against your specific plan for the business rather than a generic valuation.
Step 8: Finance the Deal
Financing typically runs in parallel with due diligence rather than starting after it's done. If you're using SBA financing, your lender will run its own underwriting process, which often includes ordering a business valuation independent of the seller's asking price. Seller financing, where the seller carries a note for part of the purchase price, is common in deals under $5 million and often signals confidence in the business's future performance. Earnouts work differently: part of the purchase price stays contingent on how the business performs after close, which can bridge a valuation gap when you and the seller disagree on what it's worth.
Step 9: Negotiate the Purchase Agreement
Once diligence is substantially complete, the LOI gets converted into a binding purchase agreement. Have this drafted by an attorney with real M&A experience; a generic contract template won't hold up if something goes wrong later. Key terms to get right: representations and warranties (what the seller is legally promising is true about the business), indemnification (what happens if something the seller represented turns out to be false), and any post-close obligations, such as a transition period where the seller stays on to train you or introduce you to key customers.
Step 10: Close and Transition
Closing involves signing the final purchase agreement, funding, and the formal transfer of ownership. Immediately after, the real work starts. Most successful transitions include a defined handoff period where the outgoing owner introduces you to key customers, vendors, and employees, and transfers institutional knowledge that never made it into any document.
The first 90 days after close are typically the highest-risk period for customer and employee attrition. Buyers who move slowly on operational changes, keep the outgoing owner's key relationships intact during the transition, and communicate clearly with staff tend to retain more of what they paid for.
How Long Does This Actually Take?
Realistically: 3-6 months of searching before finding a business worth pursuing, 30-60 days from LOI to closing for due diligence and financing, and several more months before the business feels fully "yours" operationally. Buyers who go in expecting a faster timeline often make rushed decisions at exactly the stages where rushing is most costly: diligence and financing.
Where Deals Actually Fall Apart
Most deals that fail don't fail at the offer stage. They fail at Step 7, when due diligence turns up a number that doesn't match what the listing promised, a lease that isn't actually transferable, or a customer base more concentrated than the summary package let on. Buyers who treat the LOI as the hard part and diligence as a formality are the ones who end up walking away from an earnest deposit, or, worse, closing on a business that wasn't what they thought they were buying.
If there's one place in this process worth spending more time than feels necessary, it's there.
OppDesk helps buyers run the search phase of this process more efficiently, aggregating listings across major marketplaces and brokers so you spend less time checking sources and more time evaluating businesses that actually fit what you're looking for.