What Buyers Find in Every Lower Middle Market Diligence

Every diligence process in the lower middle market surfaces the same set of findings. The specific details vary by company. The categories do not. Experienced buyers know exactly what to look for, and they have practiced the conversation about each finding with dozens of sellers. Most sellers walk into diligence having thought about none of them.

Finding 1: Owner dependency

Owner dependency is the finding that appears in nearly 100% of lower middle market diligence processes. The buyer's diligence team will map every key relationship -- top customers, key vendors, lender relationships, critical employees -- and ask who owns each one. If the answer is consistently the founder, that is not a business. That is a practice.

Buyers use owner dependency to argue that the business cannot sustain performance post-close without the seller's involvement, which increases deal risk and reduces supportable enterprise value. The remedy is a management package: a team that demonstrably owns the revenue relationships and operational decisions.

Finding 2: Undocumented addbacks

Addbacks are the mechanism by which a seller argues that reported EBITDA understates run-rate earnings because certain expenses are non-recurring or owner-related. In the lower middle market, addbacks frequently include owner compensation above market, personal vehicle expenses, owner health insurance and benefits, one-time legal or consulting fees, and non-recurring project costs.

The problem is documentation. Buyers accept addbacks that are supported by invoices, board minutes, or clear one-time characterization. They reject addbacks that are asserted without documentation, or that appear in multiple years. Quality-of-earnings firms hired by buyers are specifically trained to challenge addbacks. Every rejected addback flows directly to adjusted EBITDA, which flows directly to valuation.

Findings 3 through 5: Capex, concentration, and key employees

Deferred capital expenditure is one of the most systematically overlooked pre-sale issues. Sellers who have underinvested in equipment, facilities, or technology in the years before a sale often do so rationally -- it improves near-term cash flow and EBITDA. Buyers see it immediately. The diligence team will compare capex as a percentage of revenue against industry benchmarks, inspect equipment age and condition, and model the required catch-up investment. That catch-up capex becomes a price reduction argument.

Customer concentration above 20-25% in any single customer is a standard diligence risk flag. Above 40%, it becomes a financing risk: lenders will tighten leverage, and some buyers will not proceed without a customer estoppel letter or contractual commitment. Even in cases where concentration is disclosed upfront, buyers use it in post-LOI negotiations to argue for escrow or an earnout structure that shifts risk back to the seller.

Key employee risk is the concentration equivalent on the human capital side. If a single employee controls a major customer relationship, owns critical institutional knowledge, or is the operational core of a department, buyers identify them in diligence and use it to negotiate retention escrow, employment agreements, or price reductions.

Findings 6 through 8: IT systems, working capital, and contract documentation

IT and systems gaps create two diligence problems. First, they signal operational immaturity that buyers associate with hidden costs and post-close disruption. Second, they create practical integration risk that buyers will price into the deal structure through indemnification provisions or escrow.

How buyers weaponize findings to retrade

The LOI is not the final deal. In lower middle market transactions, the post-LOI period is when buyers surface findings and translate them into price adjustments. The playbook is consistent: identify the finding during diligence, quantify it in dollar terms, frame it as newly discovered risk, and negotiate a price reduction as the alternative to walking.

Sellers who have done pre-diligence preparation walk into this period with documented responses. Sellers who have not walk in blind. The difference in outcomes is measurable: pre-diligence-ready sellers retain an average of 5-8 percentage points more of their LOI headline multiple at close (Axial 2024).