Due Diligence
Definition
Due diligence is the buyer's (and its financing sources') investigation of a target before signing a deal — validating the financials, business plan, legal exposure, tax position, operations, technology, and management. In a sell-side process it happens in stages: a teaser and CIM first, then data room access, management presentations, and confirmatory diligence for final bidders.
Workstreams typically include a Quality of Earnings (QoE) report from an accounting firm (scrubbing EBITDA adjustments and working capital), legal diligence on contracts and litigation, commercial/market diligence (often by consultants), and tax and environmental reviews. Findings feed the model, the purchase agreement (reps, warranties, indemnities), and price negotiations.
Diligence issues commonly drive purchase price adjustments, escrows, earnouts, or walked deals. Representations-and-warranties (R&W) insurance has become a standard way to shift diligence-related risk in private M&A.
Why interviewers ask
Interviewers ask what analysts actually do in a live deal — data room management, diligence tracker upkeep, and QoE follow-ups are the honest answer. "What would you diligence in this business?" is also a common case-style prompt in private equity and M&A interviews.
Related terms
Interviews don't test definitions — they test recall under pressure.
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