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Financial Due Diligence – Reading Balance Sheets Before It Gets Costly

Acquiring a business is one of the most significant entrepreneurial decisions you will ever make – and errors in financial due diligence can have serious consequences. Financial due diligence is therefore far more than a box-ticking exercise: it is the key to identifying risks, accurately assessing opportunities, and laying the groundwork for a successful entry. In this article, you will learn how to read the most important balance sheet metrics correctly, validate forecasts, apply standard audit procedures, and understand the role that auditors and modern tools play in the process.

1. Understanding Financial Ratios: EBIT, EBITDA, Cash Flow, Working Capital & SDE

EBIT (Earnings Before Interest and Taxes):
EBIT is a key metric for assessing a company's operational earning power. It shows how profitable the core business is – independent of financing structure and tax effects. A stable, growing EBIT is an indicator of a healthy business model.

EBITDA (Earnings Before Interest, Taxes, Depreciation and Amortisation):
EBITDA is very similar to EBIT, but additionally accounts for depreciation on tangible assets and amortisation of intangible assets. It is frequently used as a proxy for operating cash flow, as it reflects a company's internal financing capacity and operational performance – independent of investment activity, financing structure, and tax effects. Particularly for small and medium-sized enterprises, EBITDA is one of the most important metrics in the context of business valuations and purchase price assessments.

Cashflow:
Operative cashflow indicates how much money is actually generated from day-to-day business operations. It is less susceptible to accounting embellishments than profit and shows whether the company is capable of funding investments, debt repayments, and distributions from its own resources.

Working Capital:
Working capital (current assets minus current liabilities) measures liquidity and operational flexibility. Negative or highly volatile working capital can indicate liquidity shortfalls, inefficient receivables management, or inventory issues – all risk factors that warrant particularly close scrutiny during due diligence.

SDE (Seller's Discretionary Earnings) / Seller's Discretionary Earnings:

In the SME and business succession context in particular, the so-called SDE (Seller's Discretionary Earnings) is frequently used. The SDE represents the profit available to the owner after deducting all operating expenses, but before accounting for their own owner's salary. Personal or one-off expenses (e.g. private vehicles, family members on the payroll, extraordinary costs) are often added back in. Pay close attention to adjusted or "dressed-up" line items – a central issue that also plays a role in the investment thesis.

Important notes for founders and buyers:

The SDE is particularly susceptible to dispute, as it depends heavily on individual structuring decisions and the seller's transparency.
It is essential, as part of the due diligence process, to carefully examine which expenses have actually been added back and how plausible these adjustments are in the context of your own future management of the business.
It is common practice in SDE calculations to "adjust" one-off or non-operating costs in order to inflate the result – this warrants particular caution.
A professional, independent analysis and critical scrutiny of all SDE adjustments are strongly recommended.

Practical tip:
A solid understanding of the key balance sheet metrics – in particular EBIT, EBITDA, cash flow, working capital and SDE – is essential for founders and buyers to identify risks, assess opportunities realistically and make sound decisions when acquiring or succeeding a business. With SDE and EBITDA in particular: scrutinise how the figures are derived and seek independent advice whenever in doubt.

2. Validating Forecasts

The valuation of a business is often based on future projections – but forecasts are not a wish list. The following guiding questions help to critically evaluate such statements:

Is the revenue growth realistic, measured against historical figures and market trends?
Are revenues one-off, repeating, or recurring? Depending on the answer, different multiples are justified.
Are cost increases, margins, and investments derived in a transparent and traceable manner?
What assumptions underlie the forecasts (e.g. new products, customers, markets)?
Are there external benchmarks or industry comparisons available for verification?
How sensitive is the model to key assumptions (sensitivity analysis)?

Practical tip:
Always ask for detailed explanations of forecasts and request scenario analyses. Question whether the assumptions are consistent with actual developments over recent years.

3. Typical Audit Trails in Practice

The financial due diligence typically follows a clear methodology:

Analysis of the last 3–5 annual financial statements:
Review of the balance sheet, profit and loss account, and cash flow statement for trends, one-off effects, and inconsistencies.
Reconciliation of accounting records and bank account:
Verification of whether reported revenues and receivables have actually been received.
Receivables and liabilities structure:
Analysis of the ageing structure of receivables and liabilities to identify risks arising from payment defaults or overdue invoices.
Inventory valuation:
Review of whether stock levels are realistically valued and not overstated.
Disclosure of contingent liabilities:
Identification of risks arising from guarantees, pending proceedings, or off-balance-sheet obligations.

4. The Role of Auditors and Tools

Auditor:
An experienced auditor is indispensable for a professional, independent assessment. They identify risks, verify compliance with accounting standards, and provide an objective evaluation of the figures. Involving an auditor is essential, particularly in the case of complex structures or international business activities.

Modern Tools:
Digital due diligence tools and data rooms facilitate structured reviews, enable automated analyses, and increase transparency. AI-based solutions support pattern recognition, anomaly analysis, and benchmarking. For the initial analysis of smaller businesses, specialised controlling tools or Excel models can also be a practical choice.

Conclusion

Financial due diligence is the foundation of a successful business acquisition. Understanding balance sheet metrics, critically evaluating forecasts, and consistently applying standard audit procedures protects you from costly mistakes. The support of experienced auditors and the use of modern tools provide additional security and efficiency throughout the review process. Find out how to calculate business values realistically in Unternehmensbewertung verstehen. Legal due diligence complements the financial analysis and ensures comprehensive protection.