What Is Due Diligence?

Why It Matters

Due diligence exists to reduce the chance of unpleasant surprises after a deal closes. Whether a company is acquiring another business, taking on an investor, or entering a significant partnership, due diligence generally helps uncover risks — financial, legal, operational, or reputational — that might not be visible on the surface.

Skipping or rushing due diligence can leave a business exposed to liabilities it didn't know it was taking on, such as pending lawsuits, undisclosed debts, or noncompliance with regulations.

How It Works

Due diligence typically unfolds as a structured review process. One party (or its advisors) requests documentation and information from the other, then analyzes it for red flags, inconsistencies, or risks that could affect the value or feasibility of the transaction.

The findings from due diligence often influence the final terms of a deal — they might lead to a lower purchase price, additional contractual protections (such as indemnification clauses), or in some cases, a decision to walk away from the transaction entirely.

Key Elements

Due diligence generally covers several categories of review, though the specific focus depends on the transaction type.

• Financial due diligence — reviewing financial statements, cash flow, and liabilities
• Legal due diligence — examining contracts, litigation history, and compliance records
• Operational due diligence — assessing business processes, systems, and key personnel
• Intellectual property due diligence — verifying ownership and protection of IP assets
• Regulatory due diligence — confirming compliance with applicable industry rules

A Business Example

As a hypothetical example, suppose a company is considering acquiring a smaller competitor. During due diligence, the acquiring company's advisors might discover that the target has an unresolved trademark dispute and several client contracts set to expire shortly after the deal would close. These findings wouldn't necessarily end the deal, but they could lead to renegotiated terms, such as a reduced purchase price or specific contractual protections addressing those risks.