Financial Due Diligence: The Complete Guide for Advisory Professionals
Master financial due diligence for M&A transactions. Checklists, common findings, red flags, and building a due diligence practice.
What Is Financial Due Diligence?
Financial due diligence (FDD) is the investigation and analysis of a company's financial information performed before a business transaction. It confirms accuracy of financial data and identifies risks affecting deal value. It's needed for M&A, private equity investments, venture capital rounds, partnerships, management buyouts, and franchise purchases.
The Financial Due Diligence Process
Phase 1 Planning (Week 1): Define scope, assemble the team, create document request list, set up virtual data room, establish timeline. Phase 2 Information Gathering (Weeks 1-2): Request financial statements, tax returns, bank statements, general ledger, AR/AP aging, revenue and vendor contracts, leases, loans, insurance, employee data, and litigation summary.
Phase 3 Analysis (Weeks 2-4): Quality of Earnings analysis normalizes EBITDA by removing non-recurring items, analyzes revenue quality and customer concentration, normalizes expenses for owner compensation and related-party transactions, and determines normal working capital levels. Also covers revenue deep dive, expense analysis, balance sheet review, and cash flow analysis.
Phase 4 Reporting (Weeks 4-5): Deliver comprehensive report with executive summary, quality of earnings analysis, working capital analysis, identified risks and opportunities, recommended deal adjustments, and items requiring further investigation.
Common Due Diligence Findings
Revenue issues: revenue recognized too early, one-time revenue mixed with recurring, high customer concentration, unsigned contracts, related-party revenue inflation. Expense issues: below-market owner compensation understating costs, deferred maintenance, underfunded benefits, missing accruals, personal expenses in the business. Balance sheet issues: uncollectible receivables, obsolete inventory, understated liabilities, off-balance-sheet arrangements.
Red Flags in Due Diligence
Revenue growing but cash flow declining suggests revenue manipulation. Significant related-party transactions indicate potential value leakage. Frequent accounting policy changes may be managing earnings. Large year-end adjustments need investigation. Customer concentration over 25% creates business risk. Declining gross margins signal pricing pressure. Delayed financial statements may indicate problems. Reluctance to provide information is always suspicious.
Building a Due Diligence Practice
Build expertise in quality of earnings analysis. Create templates for checklists, document requests, and reports. Network with M&A attorneys, business brokers, and PE firms. Start with sell-side prep helping owners prepare. Pricing: sell-side readiness $5,000-$15,000, small deal buy-side $10,000-$25,000, mid-market buy-side $25,000-$75,000, quality of earnings report $15,000-$40,000. Financial due diligence is one of the highest-value services a fractional CFO can offer.
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