Quality of Earnings: The diligence process that can make or break a deal
Executive Summary
Most deals that fall apart in middle-market M&A do not fail because the company is unattractive. They fail because the numbers do not survive diligence. In middle-market mergers and acquisitions, few steps carry more weight than the Quality of Earnings (QoE) analysis. Financial statements may present a company's reported performance with apparent clarity, but a rigorous QoE review examines whether those numbers reflect sustainable economic performance or whether they mask risk that could affect valuation, financing, and closing certainty.
QoE has become a central diligence workstream in middle-market M&A because buyers and lenders now underwrite with far less tolerance for uncertainty. A company’s earnings story is no longer judged only by reported EBITDA. It is tested across recurring revenue, customer concentration, margin sustainability, working capital requirements, add-back support, and debt-like liabilities.
For sellers the key takeaway is simple: the best time to address QoE issues is before going to market, not after a buyer discovers them. A well-prepared seller can defend their earnings narrative, reduce the risk of re-trading, and improve the probability of closing on the originally intended terms.
What Is a Quality of Earnings Analysis?
A Quality of Earnings report is a financial due diligence assessment, typically commissioned by a buyer or their private equity sponsor, that independently evaluates the sustainability and accuracy of a target company's earnings. Unlike an audit, which confirms whether financial statements conform to generally accepted accounting principles (GAAP), a QoE analysis asks a fundamentally different question: how reliable, recurring, and representative are these earnings of the company's true economic performance?
The scope of a QoE review typically covers five interconnected areas:
EBITDA normalization and the validity of management’s add-back schedule
Revenue quality, customer concentration, and contract or revenue recognition risk
Gross and operating margin sustainability under realistic assumptions
Working capital analysis and its implications for the normalized cash-on-hand requirement at closing
Net debt adjustments and off-balance-sheet exposures
eBITDA and the Add-Back Problem
The single most contested element in most middle-market transactions is the add-back schedule, the list of non-recurring, one-time, or owner-specific expenses that management adds back to reported EBITDA to arrive at an "adjusted" figure. In theory, add-backs are legitimate adjustments that help buyers understand the company's normalized run-rate earnings. In practice, they are one of the most common sources of deal friction.
Management teams, often advised by sell-side M&A advisors, have strong incentives to present the highest defensible EBITDA. Common add-backs include owner compensation above market rates, personal expenses run through the business, one-time legal settlements, costs associated with the sale process itself, and non-recurring capital expenditures. While many of these are appropriate, buyers and their QoE advisors apply a level of skepticism that sellers sometimes underestimate.
Key Risk: A pattern of "one-time" charges appearing in multiple consecutive years is one of the most common red flags that surfaces in QoE reviews. Buyers scrutinize whether claimed non-recurring items are genuinely isolated events or reflect an operating pattern. They also examine whether the owner's replacement compensation is priced at true market rates, and whether discretionary expenses that were added back are essential to running the business at the same revenue level. When an add-back is disallowed or partially accepted, the impact compounds: a $500,000 reduction in adjusted EBITDA at a 7x multiple produces a $3.5 million reduction in enterprise value.
Revenue Quality and Customer Concentration
Revenue is rarely as simple as the top line suggests. A QoE review will assess whether reported revenue is recurring or project-based, whether it is recognized appropriately under the applicable accounting standard, and whether it reflects contracts that are genuinely committed or merely indicative.
For businesses with subscription or recurring revenue models, buyers will typically assign a premium valuation, provided the QoE confirms that churn is low, contracts are enforceable, and renewal rates support management's projections. For project-driven businesses or those reliant on a small number of customers, the picture is more complex.
Customer concentration is one of the most frequently cited valuation risk factors in middle-market deals. According to the Association for Corporate Growth (ACG), deals where a single customer represents 20% or more of total revenue regularly trigger valuation discounts or structural protections — including earnouts, escrow holdbacks, or representations and warranties insurance carve-outs. The QoE process is where this risk is quantified, not just identified.
Revenue recognition policies are another focal point. Under ASC 606, the current standard governing revenue recognition for most private companies, the timing and methodology for recognizing revenue can vary meaningfully across businesses. Buyers will assess whether the company's approach is conservative and defensible, or whether it pulls forward revenue in ways that inflate the current period at the expense of future periods.
Margins Under the Microscope
Gross margin and EBITDA margin trends are examined not just for their current level, but for their trajectory and the factors driving them. A business showing margin expansion over the trailing three years will attract a different buyer conversation than one where margins have been compressing, even if the current adjusted EBITDA is identical.
QoE advisors will disaggregate margins by product line, geography, or customer segment to identify whether headline margins are masking deterioration in core operations. They will also assess the cost structure for scalability: a business where margins are dependent on the owner's personal relationships or on pricing that cannot be maintained post-transaction is materially riskier than one with institutionalized processes and stable supplier contracts.
Input cost volatility has become an increasingly important area of focus in recent years. Businesses with significant exposure to commodity prices, labor costs, or logistics rates are subject to margin sensitivity analysis as part of the QoE process, particularly when comparing the trailing twelve months to normalized historical averages.
Working Capital: The Often-Overlooked Deal Driver
Working capital is the element of QoE that surprises sellers most often. In many middle-market transactions, the purchase agreement requires the seller to deliver a normalized level of working capital, defined as current assets minus current liabilities, at closing. The precise definition of "normalized" is negotiated, but it is grounded in the QoE analysis.
If a seller has been drawing down receivables, deferring payables, or reducing inventory in the months leading up to closing, whether they are intentional or as a natural consequence of the sales process, the working capital peg can become a significant source of post-closing adjustment. Buyers and their advisors are acutely aware of this dynamic, and the QoE review will typically include a twelve-month analysis of working capital seasonality, trends, and any anomalies.
Practical Note: Many sellers do not engage in working capital analysis until late in the process, by which point their negotiating leverage on this issue is limited. Sellers who understand their working capital position early are significantly better positioned at the table.
Disputes over working capital adjustments are among the most common forms of post-closing M&A litigation. A well prepared QoE process, where the seller has commissioned a sell-side QoE analysis prior to going to market, substantially reduces the probability of these disputes and accelerates closing timelines.
How QoE Findings Impact Valuation and Financing
The QoE analysis sits at the intersection of buyer confidence and lender underwriting. In the middle market, most acquisitions involve some combination of senior debt, mezzanine financing, and equity. Each capital provider applies its own lens to the QoE findings, and a report with significant adjustments or open questions can impair a deal's financing structure before it impairs the headline price.
Senior lenders, such as banks and non-bank direct lenders, typically underwrite to QoE-adjusted EBITDA when determining leverage capacity. A downward revision in adjusted EBITDA directly reduces the amount of debt the business can support, which in turn affects the equity contribution required from the buyer and the overall deal economics. Deals that appeared comfortably financed at a given leverage ratio can become strained or unfeasible when the QoE EBITDA is lower than management's original projection.
From a valuation standpoint, the QoE outcome often determines where within a buyer's initial valuation range a deal ultimately prices. Buyers who build their initial offers on management's adjusted EBITDA routinely negotiate price reductions when the QoE reveals unsupported add-backs, revenue recognition issues, or working capital concerns. The Harvard Business Review has noted that QoE adjustments of 10% to 20% of initially reported EBITDA are not uncommon in middle-market transactions, where each percentage point translates directly into valuation.
What Kills Deals Before They Close
Understanding what terminates transactions is essential for sellers preparing to go to market and for intermediaries structuring a process. The most common deal-killers identified by QoE findings fall into several recurring categories:
Unsupportable Add-Backs - When a seller's adjusted EBITDA is built on add-backs that cannot survive buyer scrutiny, the negotiation dynamic shifts abruptly. If the gap between management's EBITDA and the QoE-adjusted EBITDA is large enough, it can cause a buyer to walk away entirely, particularly if the seller is unwilling to renegotiate on price.
Revenue Concentration and Contractual Fragility - Deals with meaningful customer concentration have closed successfully, but only when the seller can demonstrate the durability of those relationships. Verbal agreements, informal understandings, or contracts subject to termination for convenience create risk that buyers must either price or walk away from.
Undisclosed Liabilities and Off-Balance-Sheet Items - Contingent liabilities, deferred revenue obligations, environmental exposures, or unresolved litigation that surfaces during QoE, and was not disclosed proactively, are among the fastest paths to deal collapse. Buyers interpret non-disclosure as a credibility issue, not just a financial one.
Working Capital Shortfalls at Close - As noted above, working capital disputes are common. When the closing working capital is significantly below the agreed peg, the result is a post-closing purchase price adjustment that sellers find unwelcome, or a failed closing in the cases where the shortfall is extreme.
Inconsistent or Unavailable Financial Data - Businesses that cannot produce timely, consistent, and auditable financial information, including monthly P&Ls, aging reports, and general ledger detail, create diligence delays that erode buyer confidence and, in competitive processes, can cause a buyer to redirect attention to a more prepared seller.
Preparing for the QoE: What Sellers Should Do
The most effective way to manage QoE risk is to address it before going to market. Sellers who engage a sell-side QoE analysis prior to launching a transaction gain several advantages: they understand their own earnings story before buyers do, they can address potential objections in advance, and they reduce the probability of a renegotiation or deal failure late in the process.
Beyond the sell-side QoE, preparation involves ensuring that financial statements are clean and reconcilable to tax returns, which add-backs are documented and defensible, that customer contracts are current and in writing, and that working capital has been analyzed on a trailing twelve-month basis. Sellers who engage their M&A advisor early, are better positioned to present their businesses in the most favorable and accurate light.
CONCLUSIONS
Quality of Earnings analysis is no longer a back-office exercise reserved for the largest transactions. In the middle market, it is a standard and consequential component of the diligence process, one that has the power to affirm or undermine a seller's value narrative, shape lender appetite, and ultimately determine whether a deal reaches the closing table. Buyers, lenders, and sellers alike benefit from understanding what the QoE process entails and what it reveals.
For sellers, the takeaway is straightforward: earnings quality is not an afterthought. It is built over time, through disciplined financial management, clean accounting, and a thorough understanding of what drives the business. For buyers and their advisors, the QoE remains the most important tool available for converting financial statements into genuine insight, and for ensuring that value paid reflects value delivered.
Sources: Association for Corporate Growth (ACG), Middle Market Indicator Report; Harvard Business Review, M&A Due Diligence Insights; Financial Accounting Standards Board (FASB); American Institute of CPAs (AICPA), Quality of Earnings Framework Guidelines