Acquiring a company, investing in a startup, or onboarding a major customer – all these decisions require thorough vetting. Due diligence isn't a necessary evil; it's your protection against nasty surprises.
In this article, you'll get a battle-tested checklist for your due diligence – from quick business partner screening to comprehensive M&A transactions.
What is Due Diligence?
Due diligence (literally: "required carefulness") refers to the systematic examination of a company before a transaction or business relationship. The goals are:
- Identify risks – legal, financial, operational
- Verify information – are the claims accurate?
- Create valuation basis – what is the company worth?
- Strengthen negotiating position – where are the leverage points?
Types of Due Diligence
| Type | Focus | Typical Occasion |
|---|---|---|
| Financial DD | Finances, assets, liabilities | M&A, Investment |
| Legal DD | Contracts, litigation, compliance | M&A, Partnerships |
| Tax DD | Taxes, risks, structures | M&A |
| Commercial DD | Market, competition, customers | M&A, Investment |
| Operational DD | Processes, IT, personnel | M&A |
| HR DD | Employees, contracts, culture | M&A |
| Environmental DD | Environmental risks, contamination | Real estate, Industry |
| KYC/AML DD | Identity, integrity, sanctions | Business partners |
The Due Diligence Checklist
Phase 1: Basic Screening (30 Minutes)
Use the Due Diligence Checklist as an interactive tool for these checks:
Company Identity
- [ ] Verify commercial register extract (via Commercial Register Search or Firmenbuch Search)
- Correct company name and legal form
- Registered address and business address
- Date of incorporation
-
Authorized representatives
-
[ ] Verify ownership structure
- Who are the shareholders?
- What is the ownership structure?
-
Are there parent companies or group connections?
-
[ ] Confirm signing authority
- Is the signatory authorized to represent?
- Sole or joint representation?
- Are authorized signatories (prokura) recorded?
Basic Financial Data
- [ ] Retrieve current financial data
- Most recent available annual report
- Is equity positive?
-
Revenue development over recent years
-
[ ] Check creditworthiness indicators
- Payment experiences (if available)
- Collection proceedings or payment orders?
- Credit insurer status
Red Flags in Basic Screening
⚠️ Examine more closely when: - Company younger than 2 years - Minimum share capital (€25,000 for GmbH) - Frequent management changes - Registered at known shell company address - No findable web presence - Negative equity
Phase 2: Extended Review (2-4 Hours)
For larger business relationships, suppliers, or investment decisions:
Financial Due Diligence
- [ ] Analyze financial statements (3-5 years)
- Revenue development
- Profit development
- Equity ratio
- Debt-to-equity ratio
-
Liquidity ratios
-
[ ] Question balance sheet items
- Receivables plausible?
- Inventory appropriately valued?
- Provisions sufficient?
-
Depreciation methods consistent?
-
[ ] Examine cash flow
- Operating cash flow positive?
- Investments relative to depreciation
- Free cash flow available?
Legal Due Diligence
- [ ] Corporate documents
- Articles of association / bylaws
- Shareholder resolutions
-
Management changes
-
[ ] Research litigation
- Active lawsuits or proceedings?
- Check insolvency announcements
-
Negative press or media reports?
-
[ ] Review contractual relationships
- Material customer contracts
- Supplier contracts and dependencies
- Lease and rental agreements
Operational Due Diligence
- [ ] Locations and infrastructure
- How many locations?
- Owned or leased?
-
Condition of assets
-
[ ] Personnel and organization
- Employee count and development
- Organization chart and key personnel
-
Turnover and vacancies
-
[ ] Customer and supplier structure
- Customer concentration (Top 5 customers = ?% revenue)
- Supplier dependencies
- Contract durations
Phase 3: Complete Due Diligence (Weeks to Months)
For M&A transactions and larger investments:
Financial Deep Dive
- [ ] Detailed accounting analysis
- Sample document review
- Reconciliation of main and subsidiary ledgers
- Intercompany transactions
-
Proper period allocation
-
[ ] Working capital analysis
- Days Sales Outstanding (DSO)
- Days Payable Outstanding (DPO)
- Inventory turnover
-
Normalized working capital
-
[ ] EBITDA normalization
- Identify one-time effects
- Non-operating income/expenses
- Owner salaries and benefits
- Run-rate adjustments
Legal Deep Dive
- [ ] Complete contract analysis
- Change-of-control clauses
- Termination rights upon ownership change
- Non-compete agreements
-
IP rights and licenses
-
[ ] Compliance review
- Data protection (GDPR)
- Industry-specific regulation
- Environmental requirements
-
Employment law compliance
-
[ ] Liability risks
- Warranties and guarantees
- Product liability
- Environmental liability
- Tax arrears
Market Deep Dive
- [ ] Market analysis
- Market size and growth
- Market shares
-
Trends and disruption risks
-
[ ] Competitive analysis
- Main competitors
- Competitive advantages
-
Price positioning
-
[ ] Customer analysis
- Customer satisfaction
- Churn rates
- Customer lifetime value
Red Flags: When to Walk Away
Some warning signs are so severe that they justify immediate withdrawal:
Absolute Dealbreakers
🚫 Stay away when: - Evidence of fraud or deliberate deception - Serious compliance violations (corruption, money laundering) - Irremediable legal risks - Management refuses transparency - Significant, unexplainable accounting gaps
Yellow Flags (Examine Closely)
⚠️ Caution when: - High dependence on few customers - Key personnel without succession plan - Outdated IT systems - Expiring important contracts - Unclear ownership structures - Frequent strategy changes
Documenting Due Diligence
Thorough documentation is essential:
Due Diligence Report
Your final report should contain:
- Executive Summary
- Overall assessment
- Material risks
-
Recommendation
-
Detailed Analyses
- Financial
- Legal
- Operational
-
Market
-
Risk Matrix
- Identified risks
- Probability of occurrence
- Potential impact
-
Mitigation measures
-
Appendices
- Reviewed documents
- Data room index
- Q&A protocol
Practical Tips for Efficient Due Diligence
1. Prioritize by Risk
Not all areas deserve equal attention. Focus on: - Largest value drivers - Highest risks - Dealbreaker potential
2. Use Digital Tools
Manual registry research is time-consuming. Modern tools like Firmium aggregate data from various sources and significantly accelerate your analysis.
3. Ask "Why?"
Question anomalies: - Why this revenue jump? - Why this provision? - Why the management change?
4. Document Everything
What isn't documented didn't happen. Keep records of: - Documents reviewed - Questions asked - Answers received - Open items
Conclusion
Due diligence isn't a formality – it's your protection against costly mistakes. With this checklist, you have a structured framework for:
- Quick basic screening of new business partners
- Extended analysis for important business relationships
- Complete due diligence for M&A transactions
Tip: The Due Diligence Checklist guides you step by step through the review. For deeper analysis, use the Commercial Register Search, Ownership Structure Analysis, and Company Search.