Owners tend to assume that diligence is the buyer's accountant checking whether the numbers are true. That is a small part of it. What a serious buyer actually runs is a quality of earnings review — a reconstruction of your profit, built their way, to answer the one question the price depends on: how much of what you earn is real, durable, and still there after you leave. Understand what that review is looking for and you can prepare for it, instead of being surprised by it.
1. A quality of earnings review is a reconstruction, not an audit
An audit asks whether your statements follow the rules. A quality of earnings review asks a different question: what does this business really earn on a normalized, ongoing basis? The buyer's team rebuilds your EBITDA from the ground up — stripping out what will not repeat, adding back what is genuinely discretionary, and reworking the timing of revenue and expense until the number reflects the business a new owner would actually inherit. It is less an inspection of your books than a second opinion on your earnings.
2. Every add-back gets tested on its own
The gap between your tax-return profit and your "real" earnings usually lives in the add-backs — the owner salary above market, the personal expenses run through the company, the one-time legal bill. Owners present these as a single confident number. A quality of earnings review takes them apart line by line, and the ones that survive are the ones you can document. An add-back you can prove with an invoice stands; one that rests on your word tends to come out. The cleaner your support, the more of your adjusted earnings the buyer is willing to accept.
3. Working capital is part of the price, whether or not anyone says so
Most owners think of the deal as a number for the business. Buyers think of it as a number plus the working capital needed to run it. A quality of earnings review studies your receivables, payables, and inventory over time to establish what a "normal" level of working capital looks like — and that level is what you will be expected to leave in the business at closing. Get it wrong and you can hand over more cash than you planned, effectively lowering the price after you thought it was set. This is one of the quietest ways money moves in a deal.
4. Revenue quality matters more than revenue size
Two businesses with the same earnings are not worth the same if one earns it from a hundred customers under contract and the other from three that could leave next year. A quality of earnings review looks past the total at the shape underneath it: how much revenue recurs, how concentrated it is, how customers churn, how much depends on the owner's own relationships. Durable, diversified, contracted revenue holds its multiple. Earnings that lean on a few accounts or on the founder personally get discounted — not because the number is wrong, but because it is fragile.
5. The prepared seller shapes the review before the buyer runs one
The owners who come through diligence with their price intact are almost always the ones who did the work first. That can mean clean, consistent financials for the trailing few years, a documented schedule of add-backs with support attached, and — on larger deals — a sell-side quality of earnings review commissioned before going to market. A seller who hands the buyer an organized, defensible picture of earnings does not just move faster; they set the terms of the conversation. The buyer is checking your work rather than building the case from scratch.
The takeaway
Diligence is not the buyer confirming your numbers are true — it is the buyer rebuilding your earnings to see how much of the profit is real, repeatable, and transferable. The add-backs you can document, the working capital you understand, and the revenue that does not depend on you are what carry a headline price through to closing. Do that reconstruction yourself, before a buyer does it for you, and the number you agreed to is far more likely to be the number you get.
