Private Equity Due Diligence Checklist: A Guide for Owners and Executives

When a private equity firm evaluates a business, the due diligence process is its primary tool for verifying value and identifying risk before committing capital. For business owners and executives on the other side of that process, understanding what gets scrutinized, and preparing for it in advance, can meaningfully affect both the outcome and the timeline of a transaction.

Financial Due Diligence

Financial due diligence is the most intensive phase of the process. Investors will request several years of audited financial statements, tax returns, and detailed monthly financials. The primary objective is a quality of earnings (QoE) analysis which is a normalized view of EBITDA that strips out non-recurring expenses, related-party transactions, and accounting anomalies to arrive at a sustainable earnings baseline.

QoE adjustments are common in middle-market transactions and can have a direct effect on valuation. The more clearly a business can document and explain its financials ahead of time, the less room there is for a buyer to make downward adjustments during negotiation.

Key documents to have ready:

• Three or more years of historical audited annual financial statements
• Recent interim financials
• Federal and state tax returns
• A detailed schedule of any EBITDA adjustments with supporting documentation
• Revenue, gross margin, and operating expense breakdowns by period

Legal Due Diligence

Legal diligence runs parallel to the financial review and focuses on confirming corporate integrity and identifying potential liabilities. Investors will examine:

• Corporate formation documents and bylaws
• All material contracts, including customer, supplier, and debt agreements
• Litigation history and any pending legal actions
• Intellectual property ownership and registrations
• Employment agreements and labor law compliance

Undisclosed liabilities discovered late in the process are among the most common causes of deal delays or renegotiation. Reviewing these areas in advance and resolving known issues before entering a process is time well spent.

Operational Due Diligence

Where financial diligence examines the past, operational diligence assesses the business's capacity to generate future cash flow. Investors will analyze market position, competitive dynamics, customer concentration, and supply chain vulnerabilities. Management team interviews are standard, the depth and stability of leadership is a material factor in most PE investment decisions.

For companies that own their facilities, real estate is evaluated as part of operational diligence. Investors assess property condition, location, and long-term suitability for operations. They also examine how the real estate fits into the overall capital structure, including whether it represents an opportunity to unlock liquidity. A sale-leaseback, for example, can surface capital from an owned facility without disrupting operations, and is often considered alongside broader corporate recapitalization strategies. The sale-leaseback solutions overview covers how this transaction type works in practice.

Technology and ESG Diligence

Due diligence in 2026 extends beyond financials and operations. Technology infrastructure and ESG factors are now standard areas of review for most institutional PE firms.

On the technology side, investors evaluate the scalability, security, and efficiency of a company's systems. Cybersecurity is a particular focus — undisclosed vulnerabilities or prior incidents carry real remediation costs and reputational risk that can affect deal terms.

ESG criteria have become embedded in many institutional investment mandates. Diligence will typically include a review of environmental impact, workplace safety records, diversity and inclusion policies, and governance structures. Companies with documented, proactive approaches to these areas tend to move through this part of the process more smoothly. For context on how lease structures factor into operational and ESG assessments of owned real estate, the triple net lease vs. gross lease guide is a useful reference, as is the single-tenant NNN lease guide for companies in industrial or freestanding facilities.

Key Takeaways

• Financial due diligence centers on a quality of earnings analysis to establish a normalized, defensible EBITDA figure — the primary driver of valuation in most PE transactions.
• Legal diligence focuses on identifying undisclosed liabilities and confirming corporate integrity across contracts, litigation history, and intellectual property.
• Operational diligence evaluates the business's ability to generate future cash flow, including the management team's depth..
• Technology infrastructure and ESG factors are now standard components of institutional due diligence and should be prepared for alongside the financial and legal review.

Frequently Asked Questions

What is the main goal of a private equity due diligence checklist? The primary goal is to verify the seller's claims about the business and identify any risks, liabilities, or operational weaknesses before an investment is made. It allows the PE firm to confirm its investment thesis and finalize valuation and deal terms with confidence.

How long does private equity due diligence typically take? For a middle-market company, due diligence typically runs 60 to 90 days from the signing of a letter of intent. Timeline varies based on the size and complexity of the business and how prepared the seller is when the process begins.

What financial documents are required for due diligence? Investors will typically require several years of audited annual financial statements, recent interim financials, tax returns, and a detailed schedule of EBITDA adjustments. Breakdowns of revenue, gross margin, and operating expenses by period are also standard requests.

Why is real estate diligence important in a PE transaction? For companies that own their facilities, real estate diligence determines asset value, identifies environmental risks, and assesses long-term operational suitability. It also surfaces opportunities to unlock capital — a sale-leaseback, for example, can convert owned real estate into growth funding without adding debt.

What happens if a red flag is found during due diligence? Depending on the severity, a red flag can lead to price or terms renegotiation, a requirement that the seller resolve the issue before closing, or in serious cases, termination of the transaction. Most issues that surface late in a process could have been addressed earlier which is why preparing thoroughly before entering a sale process is worth the effort.

Work With Tenet Equity

If your company owns commercial real estate and you're evaluating how it fits into your long term capital strategy, Tenet Equity structures sale-leaseback transactions for middle-market businesses. Contact us to start a confidential conversation.