Angel Investors Network
    Glossary

    Due Diligence Period

    The due diligence period is a defined timeframe—typically 30-90 days—during which an investor conducts thorough investigation of a company before committing capital. During this window, investors verify financial statements, assess market opportunity, evaluate management, and uncover risks. It's the critical pause that separates impulsive checks from informed investments.

    The due diligence period is a contractually defined timeframe—usually 30-90 days, sometimes longer for complex deals—when an investor investigates a company's operations, finances, and prospects before finalizing an investment. Think of it as your legal window to verify everything before money changes hands. During this period, you have the right to request documents, conduct background checks, speak with customers and employees, and hire advisors. The deal remains conditional until you formally approve and close.

    How It Works

    The due diligence period typically begins after you've signed a term sheet or investment agreement. The startup provides access to a data room—either physical or digital—containing financial records, cap tables, customer contracts, and legal documents. You and your team (accountants, lawyers, technical experts) review these materials and ask questions. At the end of the period, you either proceed to closing, renegotiate terms based on findings, or walk away without penalty. Some deals include a non-binding period where either party can exit; others are binding once the period expires.

    Why It Matters for Investors

    This period protects your capital by giving you time to verify the investment thesis. You confirm revenue claims, assess competitive positioning, evaluate management capability, and identify hidden liabilities or legal issues. For angel investors, this is your due diligence period to catch red flags—undisclosed lawsuits, inflated customer numbers, key employee departures, or technology that doesn't work. Skipping this step is how investors lose money. A thorough process also builds negotiating power; if you uncover issues, you can renegotiate valuation or terms before closing.

    Example

    You commit to invest $250,000 in a SaaS startup with a 60-day due diligence period. Your lawyer reviews their cap table and finds a disputed equity claim from a co-founder. Your accountant audits revenue and discovers 40% is from a single customer under a terminable contract. Your technical advisor identifies a critical security flaw. These findings give you leverage to request a lower valuation, board seat, or additional protective provisions—or to walk away entirely. Without the due diligence period, you'd be locked in after closing.

    Key Takeaways

    • The due diligence period is your contracted window to investigate before capital closes—typically 30-90 days.
    • Use it to verify financials, assess management, check references, and identify legal or operational risks.
    • A thorough process protects your capital and strengthens your negotiating position on terms.
    • Walking away during due diligence is normal and better than closing with unresolved concerns.