ETA Due Diligence Checklist

Due diligence is the most critical phase of any search fund acquisition. It begins after you sign a Letter of Intent and covers every area you need to investigate before signing a purchase agreement. According to the 2024 Stanford Search Fund Study, inadequate due diligence is among the top reasons cited by searchers whose acquisitions underperformed, making this phase the single greatest determinant of long-term success.

The goal of due diligence is not to confirm what the seller has told you - it is to independently verify every material claim about the business and uncover risks that may not be visible from the outside. Thorough due diligence protects you, your investors, and your lender. It also gives you the operational playbook you will need from day one as the new owner.

Financial due diligence

• 3-5 years of audited financial statements (P&L, balance sheet, cash flow).
• Quality of earnings (QoE) analysis - separate recurring vs. non-recurring items.
• Revenue breakdown by customer, product/service, and geography.
• Customer concentration analysis (top 10 customers as % of revenue).
• Working capital analysis and seasonal patterns.
• Capital expenditure history and future requirements.
• Debt schedule, covenants, and off-balance-sheet liabilities.
• Owner add-backs and normalization adjustments to EBITDA - see business valuation methods for how these affect pricing.
• Tax returns and any ongoing disputes with tax authorities.

The financial due diligence workstream deserves special attention because it directly affects your purchase price, debt capacity, and post-close cash flow. A Bain & Company analysis of over 2,500 M&A transactions found that rigorous financial due diligence reduced the incidence of post-close earnings surprises by more than 30%. Here are the critical sub-analyses you should perform.

Quality of Earnings (QoE) analysis.A QoE is the single most important financial deliverable. Typically conducted by a third-party accounting firm, the QoE independently verifies the company's adjusted EBITDA by examining every add-back the seller has claimed. A good QoE firm will also identify adjustments the seller did not make - both positive and negative. Expect to spend $30,000 to $60,000 on a QoE for a typical search fund acquisition. This is not the place to cut costs. Your SBA lender will almost certainly require a QoE, and your investors will expect one.

Revenue quality analysis.Not all revenue is created equal. Break down the company's revenue along every dimension you can: by customer, by product or service line, by geography, by contract type (recurring vs. project-based vs. transactional), and by vintage (new customers vs. existing). Look for trends in customer retention rates, average revenue per customer, and the mix shift between higher-margin and lower-margin lines. If the company has grown revenue but the growth is concentrated in a lower-margin service line, the headline number may be misleading.

Customer concentration.This is one of the most common deal-killers in search fund acquisitions. If any single customer represents more than 15-20% of revenue, you face meaningful risk that the loss of that customer could impair the business. Conduct direct interviews with the top 5-10 customers to assess the strength and durability of those relationships. Understand the contractual terms, renewal cadence, and switching costs from each major customer's perspective. Many experienced search fund investors will not back an acquisition where a single customer represents more than 25% of revenue.

Working capital analysis. Working capital - the difference between current assets and current liabilities - is often overlooked during deal negotiations but has significant implications for your post-close cash position. Analyze the seasonal patterns in accounts receivable, inventory, and accounts payable. Establish a target working capital peg (typically the trailing 12-month average) and negotiate that the seller delivers the business with at least that level of working capital at closing. Deviations from the peg should result in dollar-for-dollar purchase price adjustments.

Legal due diligence

• Corporate formation documents, bylaws, and shareholder agreements.
• All material contracts (customers, suppliers, leases, licenses).
• Intellectual property - patents, trademarks, trade secrets, software licenses.
• Pending or threatened litigation and historical legal disputes.
• Regulatory compliance and industry-specific permits/licenses.
• Environmental liabilities and compliance history.
• Insurance policies and claims history.

Legal due diligence should be led by experienced M&A counsel - not your family attorney or general corporate lawyer. A specialized M&A attorney knows exactly what to look for and can flag risks that a generalist would miss. Here are the areas that require the deepest scrutiny.

Contract review. Request copies of every material contract the business has with customers, suppliers, landlords, and partners. Pay particular attention to change-of-control clauses that could allow counterparties to terminate or renegotiate agreements upon a sale of the business. Also look for exclusivity provisions, non-compete restrictions, and auto-renewal terms that could limit your operational flexibility post-acquisition.

Litigation risk. Beyond current lawsuits, ask about threatened litigation, demand letters, and regulatory inquiries the company has received in the past five years. Request copies of all correspondence with regulatory agencies. If the business operates in a litigious industry (healthcare, construction, environmental services), consider hiring a specialist to assess the potential exposure. Material litigation risk should be reflected in either the purchase price or through indemnification provisions in the purchase agreement.

Employment agreements and HR compliance. Review all employment agreements, especially those with key employees. Check for non-compete and non-solicitation clauses that might be assigned to you as the buyer. Verify compliance with wage and hour laws, proper classification of independent contractors vs. employees, and the status of any employee benefits plans (especially retirement plans, which can carry hidden liabilities). In the US, ensure COBRA, ADA, and FMLA compliance; in Europe, review works council requirements and collective bargaining agreements.

Environmental and regulatory.For businesses with physical operations - manufacturing, distribution, food service - environmental liabilities can be enormous and hidden. Request a Phase I environmental site assessment for any real estate included in the transaction. Review the company's history of environmental permits, violations, and remediation efforts. In regulated industries, verify that all licenses and permits are current and transferable.

Operational due diligence

• Organizational chart and key employee identification.
• Employee contracts, benefits, and compensation structures.
• Key person dependencies - what happens if critical staff leave?
• Technology stack, IT infrastructure, and cybersecurity posture.
• Facilities, equipment condition, and lease terms.
• Supply chain dependencies and vendor relationships.
• Quality management systems and certifications (ISO, etc.).

Operational due diligence is where you build the knowledge base you will need to run the business from day one. While financial and legal diligence are largely outsourced to professionals, you should personally lead the operational workstream.

Key person risk. In small businesses, institutional knowledge and critical relationships are often concentrated in one or two individuals - sometimes including the departing owner. Map out every key function (sales, operations, finance, IT) and identify who holds the institutional knowledge for each. Develop a retention plan for critical employees that includes stay bonuses, equity incentives, or enhanced benefits. If you determine that a key employee is a flight risk, factor the cost of replacement and business disruption into your valuation.

Technology and systems.Evaluate the company's technology infrastructure with a critical eye. Is the ERP system modern and well-maintained, or is the company running critical operations on spreadsheets and legacy software? What is the state of their cybersecurity - do they have proper backup systems, access controls, and incident response plans? Technology modernization is a common post-acquisition value creation lever, but it can also be a significant unplanned expense if the current systems are more fragile than they appear.

Facility and equipment condition. Conduct physical inspections of all facilities and major equipment. Engage specialists (building inspectors, equipment appraisers) for capital-intensive businesses. Deferred maintenance is common in owner-operated businesses where the seller has been minimizing investment in anticipation of a sale. Document any deferred capex and factor it into your post-close capital plan.

Supply chain and vendor dependencies.Identify the company's critical suppliers and assess the risk of disruption. Are there single-source dependencies? What are the lead times for key inputs? Interview major suppliers to understand the health of the relationship and their capacity to support the business going forward. In a post-COVID world, supply chain resilience is no longer a theoretical concern.

Commercial due diligence

• Market size, growth trends, and competitive environment.
• Customer interviews - satisfaction, switching costs, contract renewal rates.
• Sales pipeline and new business development process.
• Pricing power and margin sustainability.
• Competitive moat - what makes this business defensible?
• Growth opportunities - organic expansion, add-on acquisitions, new markets.

Commercial due diligence validates the business's market position and growth prospects. This is where you test the thesis that the business will continue to generate strong cash flows under your ownership. Deloitte's 2024 M&A Trends Report emphasizes that acquirers who conduct thorough commercial DD are twice as likely to achieve their value-creation targets within the first two years.

Customer interviews. Direct conversations with customers are the most valuable source of commercial insight. Aim to speak with 10-20 customers, including the largest accounts, recent wins, recent losses, and long-tenured relationships. Ask about their satisfaction with the product or service, what would cause them to switch to a competitor, whether they plan to increase or decrease spending, and how they perceive the company relative to alternatives. These conversations often surface competitive dynamics and risks that do not appear in the financial statements.

Market size and competitive environment.Understand the total addressable market and the company's share of it. Map out the competitive environment, including both direct competitors and potential disruptors. For niche businesses, the competitive analysis may be more about barriers to entry (licensing, relationships, specialization) than about head-to-head competition. If you plan to grow through geographic expansion or adjacent services, validate the size of those opportunities through market research and industry expert calls.

Cultural & transition due diligence

• Seller's motivation and timeline for transition.
• Company culture and employee morale assessment.
• Transition plan - how long will the seller stay to ensure continuity?
• Relationships with key stakeholders (customers, suppliers, community). Consider working with advisors who specialize in transition management.
• Identify potential risks of ownership change on business relationships.

Cultural diligence is often underestimated, but McKinsey research on M&A integration found that cultural misalignment is the primary driver of value destruction in 30% of failed deals. In a search fund context, you are not just acquiring a business - you are stepping into an existing culture as a new leader. Dedicate time to informal employee conversations, observe how teams interact during site visits, and ask the seller about unwritten norms that shape how work gets done.

Transition planning. Negotiate a detailed seller transition period as part of your purchase agreement. Most search fund acquisitions include a 3 to 12 month consulting arrangement with the departing owner. During diligence, assess how dependent the business is on the seller's personal relationships, tacit knowledge, and day-to-day involvement. The deeper the dependency, the longer and more structured the transition period should be. Map out the critical introductions, knowledge transfers, and handoffs that must occur during this period and build them into a written transition plan before closing.

Timeline and cost of due diligence

A typical search fund due diligence process takes 45 to 60 days from LOI signing to purchase agreement execution. Some deals can be completed faster (30 days for simpler businesses), while complex transactions with environmental issues, regulatory approvals, or multi-entity structures can take 90 days or more.

Budget $75,000 to $150,000 in professional fees for a thorough due diligence process. This typically breaks down as follows:

• Quality of Earnings (QoE): $30,000 - $60,000 depending on the complexity of the business and the accounting firm you engage.
• Legal counsel: $25,000 - $50,000 for contract review, purchase agreement negotiation, and corporate structuring.
• Environmental assessment: $5,000 - $15,000 for a Phase I assessment; significantly more if a Phase II is required.
• Insurance review: $2,000 - $5,000 for a thorough analysis of existing coverage and reps & warranties insurance.
• Specialty consultants: $5,000 - $20,000 for IT assessments, equipment appraisals, or industry expert calls as needed.

These costs are typically funded from the search capital budget, though some investors will agree to fund excess diligence costs separately if the deal is compelling. Keep in mind that if the deal falls apart during diligence, these costs are sunk - another reason to be rigorous in your pre-LOI screening so you only enter diligence on deals with a high probability of closing.

Red flags that should kill a deal

Not every issue uncovered in due diligence is a deal-breaker. Many findings can be addressed through purchase price adjustments, seller indemnification, or post-close operational plans. However, certain red flags should cause you to walk away from a deal entirely.

• Financial fraud or material misrepresentation. If the seller has intentionally misrepresented financial performance - inflating revenue, hiding liabilities, or fabricating customers - walk away immediately. If they lied during the courtship, they will lie during the transition.
• Irreversible customer concentration. If a single customer represents 40%+ of revenue and there is no realistic path to diversification, the risk is too high for a leveraged acquisition. The loss of that customer could leave you unable to service your debt.
• Undisclosed litigation or regulatory exposure. Material legal liabilities that the seller failed to disclose in the LOI process signal both financial risk and a broken trust relationship.
• Key employee who will leave. If a mission-critical employee (the top salesperson, the operations manager who runs the floor) has indicated they will leave after the sale and cannot be retained, the business you are buying may not be the business you think it is.
• Structural industry decline. If your commercial diligence reveals that the company's core market is in secular decline - not cyclical but structural - the business will require constant reinvention just to maintain revenue. This is the opposite of the stable, cash-generative business that the search fund model is designed for.
• Toxic company culture. If employee interviews reveal widespread dissatisfaction, a culture of fear, or deep resentment toward the owner, you will face an uphill battle from day one. Culture problems take years to fix and cause attrition in the meantime.
• Environmental contamination. If a Phase I assessment identifies recognized environmental conditions that require remediation, the cost can be six or seven figures. Unless the seller is willing to fully indemnify and escrow funds for remediation, walk away.

Remember: the purpose of due diligence is to give you the information you need to make a fully informed decision. Walking away from a deal after spending $75,000 on diligence is painful, but it is far less painful than acquiring a business with hidden problems that impair your ability to service debt, pay your employees, and generate returns for your investors.

Frequently Asked Questions

How long does due diligence take for a search fund acquisition?

Typical due diligence takes 45 to 90 days from LOI signing to purchase agreement execution. Simpler businesses with clean financials and limited regulatory exposure can close in as few as 30 days, while complex deals involving regulated industries, multi-location operations, or environmental concerns may require 90 to 120 days. Financial and legal workstreams usually run in parallel to compress the timeline.

What are the most common due diligence red flags?

The most frequent deal-killers include declining revenue trends without a clear explanation, customer concentration above 20%, undisclosed liabilities or pending litigation, heavy key-person dependence on the departing owner, significant discrepancies between tax returns and seller-prepared financials, and environmental contamination requiring remediation. For a deeper dive, see our guide to red flags in due diligence.

How much does due diligence cost?

Budget $75,000 to $150,000 in professional fees for a thorough process. The largest line item is the Quality of Earnings report ($30,000 to $60,000), followed by legal counsel ($25,000 to $50,000), environmental assessments ($5,000 to $15,000), and specialty consultants as needed. These costs are typically funded from the search capital budget.