I Found a Business I Want to Buy. What Do I Actually Need to Verify Before I Sign?
Buying an existing business is often the smarter move. You're acquiring revenue that already exists, customers who already pay, and systems someone else spent years debugging. Compared to starting from zero, you're skipping the hardest part.
But you're also buying every problem the seller hasn't mentioned. And a seller under contract is, understandably, not in the business of volunteering bad news.
Due diligence is the period where you go find it yourself. Here's what actually matters — and what most first-time buyers skip.
1. Verify the Earnings Before You Verify Anything Else
Nearly every price is built on a cash flow figure. If that figure is wrong, nothing else you check will save you.
Start here:
Three years of tax returns, and confirm they reconcile to the internal financial statements. A gap between what the seller told the IRS and what they're telling you is the single loudest warning sign in a small deal.
Bank statements and merchant processing records against reported revenue. Revenue should be traceable to deposits.
Every add-back, individually. Sellers add back personal expenses to inflate discretionary earnings. Some are legitimate — an owner's personal vehicle, a one-time legal settlement. Others are the cost of running the business dressed up as an owner perk. Make the seller document each one. Ask specifically whether a "one-time" expense has appeared in more than one year.
Deferred maintenance and understated costs. Equipment nearing replacement, a building repair the seller has been postponing, or an owner working 60 hours a week in a role you'll have to hire for. That last one is common and expensive: if the seller pays themselves nothing and works full time, the real earnings are lower than the stated ones by the cost of your replacement.
2. Find Out Whether the Revenue Will Still Be There
Historical earnings only matter if they survive the transition.
Customer concentration. Pull revenue by customer for three years. One customer at 30% or more of revenue is a material risk that should affect both your price and your deal structure.
Contracts and their assignability. Many contracts terminate or require consent on a change of ownership. Read them. A book of business that legally evaporates at closing isn't a book of business.
Customer tenure and churn. Are the top accounts twenty years old, or did they all arrive in the last eighteen months?
Who owns the relationships. If customers are loyal to the seller personally — common in professional services, trades, and anything relationship-driven — you're buying goodwill that may walk out with them.
Referral sources. If a large share of new business comes from one or two referral partners, meet them before closing.
3. Understand Why It's Really for Sale
The stated reason is retirement or a new opportunity roughly ninety percent of the time. Sometimes that's true.
Test it against the evidence. A key customer just gave notice. A new competitor opened last year. A license, franchise agreement, or major contract is up for renewal. Revenue peaked two years ago. The lease is expiring and the landlord has other plans. An industry-wide shift is about to land.
You're not looking for dishonesty — you're looking for the thing the seller has priced in and you haven't.
4. Verify the People
For most small businesses, the team is the asset.
Who's genuinely critical, and are they staying? Talk to them if the seller will allow it — often late in diligence, under confidentiality.
Are key employees under any agreement at all, or free to leave with clients on day one?
Is the seller bound by a real non-compete with defined scope, duration, and geography?
Are workers properly classified? Misclassified contractors are a liability you may inherit.
Is compensation at market? If the seller has underpaid a loyal team for a decade, your first year includes a payroll correction nobody quoted you.
5. Check the Legal and Operational Foundation
Licenses and permits, and whether they transfer or must be reapplied for. In regulated fields this can gate the entire closing.
The lease. Remaining term, renewal options, rent escalations, and whether the landlord will consent to an assignment. For a location-dependent business, the lease can be worth more than the equipment.
Litigation, liens, and tax standing — current, pending, and threatened.
Systems and intellectual property. Who owns the domain, the phone number, the customer list, the social accounts, the software licenses? These are routinely held in a seller's personal name and forgotten until after closing.
Insurance history and claims. A pattern of claims tells you about operations that the P&L doesn't.
6. Structure Around What You Can't Verify
Not everything is verifiable, and that's fine — that's what deal structure is for.
An asset purchase generally leaves unknown liabilities behind; a stock purchase generally doesn't. Escrow and holdbacks cover problems that surface after closing. Earnouts bridge disagreements about whether the growth is real. Reps and warranties put the risk of a false statement back on the seller. A transition period keeps the seller available while relationships transfer.
And know the financing rules before you negotiate. SBA acquisition loans currently require a minimum ten percent equity injection, with a defined portion of that coming from the buyer's own cash rather than seller paper — and the terms under which a seller note counts toward that injection have tightened considerably. This directly shapes what you can offer. Confirm the current requirements with your lender early, because a structure that would have closed two years ago may not qualify today.
7. Bring People Who Have Done This Before
Use a CPA experienced in acquisitions for the quality-of-earnings work, an attorney who handles business purchases for the documents, and an industry-specific advisor where the sector has quirks you don't know.
This costs real money on a deal that might not close. Spend it anyway. The diligence that kills a bad deal is the most profitable money you'll ever spend — and the discipline to walk away is what separates buyers who do well from buyers who do one deal.
Final Thoughts
Due diligence isn't about finding a perfect business. There isn't one. It's about making sure the business you close on is the same business you were shown — and that you know exactly which problems you're inheriting, so you can price them, structure around them, or walk.
The best outcome of diligence isn't confidence. It's clarity.
If you're evaluating an acquisition and want a second set of eyes on the numbers, the risks, and the structure, that's a core part of what we do on the buy side. Schedule a consultation.