Would You Buy This Company? The Due Diligence Exercise Most Owners Never Run
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Every business owner eventually sits across the table from someone evaluating their company — a lender, an investor, an acquirer. Almost none of them sit across the table from themselves. That asymmetry is expensive. The questions a buyer asks in the first ninety minutes of diligence are questions you could be asking quarterly, and answering honestly, long before anyone with leverage asks them for you.
The exercise is simple in structure and uncomfortable in practice: pretend you have received a letter of intent. A serious buyer is flying in next week. You now have to defend every number, every process, and every assumption in the business — to someone who has no sentimental stake in any of them.
Start With the Customer List, Not the P&L
The first thing a seasoned acquirer requests is not your revenue growth. It is your revenue distribution. Pull your last twelve months of invoicing and rank customers by contribution. If your top client represents more than twenty percent of revenue, or your top three represent more than half, a buyer will not treat this as a detail — they will treat it as the central risk of the transaction, and they will price it accordingly.
Owners tend to normalize concentration because it accumulated gradually. The anchor client that once represented fifteen percent grew alongside the company. That is a rational story. It is also, to an outsider, a single point of failure wearing a friendly face. The diligence question is not whether the relationship is strong. It is what happens to payroll if the relationship ends in March.
The Process Audit: What Lives Only in Someone's Head
Next, walk through your operation as if you were the incoming operator. For each recurring workflow — quoting, onboarding, billing, collections, scheduling — ask who performs it and where the instructions live. If the answer is "Dave handles it" or "we've always just done it this way," you have documented nothing, and an acquirer will classify that as an integration cost.
This is rarely about writing manuals for their own sake. It is about whether the business produces the same outcome independent of any single individual. A buyer will test this directly, sometimes by asking mid-level employees to explain workflows the owner believes are well established. The gap between what leadership thinks is documented and what the floor actually knows is a standard diligence finding, and it is almost always larger than expected.
The Founder Test Nobody Passes Comfortably
The hardest section of the exercise is the one where you interrogate your own dependency. List every relationship a buyer would consider an asset: key customers, key vendors, the bank, the largest referral sources, your best employees. Now count how many of those relationships run through you personally.
If the honest answer is "most of them," the business is not yet a business — it is a practice with employees. Buyers have a term for this: key person risk, and it is among the most common reasons deals are repriced or abandoned in diligence. The corrective work — delegating client relationships, building a second layer of management, removing yourself from routine approvals — takes years, which is precisely why it should begin long before you ever contemplate a sale.
Read Your Own Numbers Like a Skeptic
Finally, re-examine your financials with the assumption that every figure will be challenged. Are owner perks buried in operating expenses? Are revenue recognition and cash flow telling the same story? Can you explain any variance greater than ten percent without reaching for anecdote? A buyer's accountants will rebuild your numbers from source documents. If you cannot reconstruct your own EBITDA adjustments on paper, neither can they, and ambiguity in diligence always resolves in the buyer's favor.
The Point of the Exercise
None of this requires an exit strategy. The mock diligence is valuable precisely because it substitutes external standards for internal habits. Owners tolerate gaps slowly, one reasonable exception at a time. A buyer's checklist collapses that gradualism back into a single clear-eyed view.
Run the exercise annually. Score yourself the way a stranger would. The gaps you find are not indictments — they are a work plan, delivered years earlier and at far better terms than a term sheet would ever offer.
