Due diligence and an audit are not the same thing. Due diligence is a forward-looking investigation carried out before a major financial decision, such as an acquisition or funding round, to assess risks and opportunities. An audit is a backward-looking, independent verification of a company’s financial statements to confirm they are accurate and compliant with accounting standards.
Both processes examine financial information, but they serve entirely different purposes, are triggered by different events, and are conducted by different parties. Understanding the distinction matters when you are preparing for a transaction, raising capital, or navigating investor scrutiny. The sections below break down exactly where the two processes differ and when each one applies.
When is due diligence used instead of an audit?
Due diligence is used when a specific transaction or investment decision is on the table. It is not a routine process. Instead, it is triggered by events such as a merger or acquisition, a new funding round, a refinancing negotiation, or bringing on a strategic investor. The goal is to give the buyer or investor a clear picture of what they are actually getting into before they commit.
An audit, by contrast, is often a recurring obligation. Many companies are legally required to have their annual financial statements audited, regardless of whether a transaction is taking place. Publicly listed companies, larger private companies, and companies operating in regulated industries typically face mandatory audit requirements under Dutch and European law.
The key distinction is purpose. Due diligence is commissioned to support a decision. An audit is performed to provide independent assurance on the accuracy of financial reporting. If you are a founder preparing for an exit, you will almost certainly face due diligence. Whether or not you also need an audit depends on your company’s size, structure, and legal obligations.
What does due diligence actually examine?
Due diligence examines a broad range of business information, well beyond the financial statements. It covers everything a buyer or investor needs to assess the full risk and value of a company before making a commitment. The scope is deliberately wide because the goal is to surface hidden risks, validate assumptions, and confirm strategic fit.
A comprehensive due diligence investigation typically covers the following categories:
- Financial due diligence: annual accounts, management reports, cash flow, forecasts, and the overall business plan
- Legal due diligence: incorporation documents, shareholder agreements, contracts, and ownership structure, including the UBO (Ultimate Beneficial Owner)
- Tax due diligence: VAT and payroll tax filings, corporate income tax returns, tax rulings, and incentives such as the innovation box
- Commercial due diligence: major customer relationships, supplier contracts, and market position
- HR due diligence: employment contracts, pension schemes, and key personnel arrangements
- Technical due diligence: software documentation, patents, and intellectual property rights
Financial due diligence sits at the heart of the process, but it is never the whole picture. Investors and buyers want to understand the zero moment of cash, the KPI framework, the shareholder and financing structure, and how well the finance function itself is operating. A company that can answer these questions quickly and clearly signals that it is in control.
What does an audit examine compared to due diligence?
An audit examines whether a company’s financial statements give a true and fair view of its financial position, in accordance with the applicable accounting standards. The auditor’s focus is narrow by design: they verify that the numbers reported in the annual accounts are accurate, complete, and presented correctly under the relevant framework, such as Dutch GAAP or IFRS.
Where due diligence casts a wide net across legal, tax, commercial, and operational areas, an audit stays firmly within the boundaries of the financial statements. An auditor will test whether revenue is recognised correctly, whether liabilities are fully disclosed, and whether the balance sheet reflects reality. They are not tasked with assessing whether the business model is sound, whether the customer base is concentrated, or whether the IP is protected.
Another important difference is the time horizon. An audit looks back at a completed financial year. Due diligence looks both backward and forward, examining historical performance while also scrutinising forecasts, business plans, and future cash flow projections. For a buyer or investor, knowing what happened last year matters less than understanding what is likely to happen next.
Who conducts due diligence versus an audit?
An audit must be conducted by a registered, independent external auditor, typically a certified public accountant (RA in the Netherlands). Independence is a legal requirement: the auditor cannot have any financial or personal interest in the company they are auditing. Their findings are documented in a formal audit opinion, which carries legal weight.
Due diligence is more flexible. It is typically carried out by a team assembled around the specific transaction, which may include:
- Financial advisors or interim CFOs with M&A experience
- Legal counsel reviewing contracts and corporate structure
- Tax specialists examining filings and compliance
- Technical experts assessing IP or software infrastructure
The CFO of the target company plays a critical role on the other side of the table. They are responsible for ensuring that all relevant documentation is organised, up to date, and accessible, ideally in a structured virtual data room using tools like Microsoft SharePoint or Google Drive. A CFO who can produce clean, well-organised information quickly gives investors and buyers immediate confidence that the company is well managed.
Can due diligence replace an audit, or vice versa?
No. Due diligence and an audit cannot replace each other because they serve fundamentally different purposes. An audit provides independent, legally recognised assurance on financial statements. Due diligence provides decision-support analysis for a specific transaction. One is about compliance and credibility; the other is about informed decision-making.
That said, a clean audit history does make due diligence easier. When audited financial statements are available, the financial due diligence team has a verified baseline to work from. It reduces the time spent verifying historical numbers and shifts the focus toward forward-looking analysis, which is where the real value lies for investors and buyers.
Some founders assume that because they have been audited, they are automatically due diligence ready. This is a common misconception. An audit confirms that last year’s accounts were accurate. It does not mean your data room is organised, your forecasts are credible, your contracts are in order, or your KPIs are clearly documented. Being truly prepared for due diligence requires ongoing effort, not a one-time exercise.
How Greyt supports you through due diligence
We help founders, CFOs, and finance teams prepare for and navigate due diligence from a CFO perspective, focused on insight, risk reduction, and protecting value at critical moments. Whether you are preparing for a funding round, a refinancing, or an acquisition, we make sure you are ready before the process starts, not scrambling once it does.
Our due diligence services include:
- Finance Maturity Assessment (FMA): a thorough review of your finance function, processes, systems, and reporting quality, with concrete recommendations on what needs to be strengthened before a transaction
- Refinancing due diligence: an independent assessment of your financial health, cash flow, and debt structure to support better conversations with your bank or lenders
- Acquisition due diligence: a detailed review of a target company’s financials, operations, and risks to surface hidden issues, test the valuation, and confirm strategic fit
Our team of experienced (interim) CFOs guides the entire process and delivers clear, actionable reports, not generic checklists. We work directly with founders, CFOs, and private equity and venture capital teams who need a trusted financial partner at a critical decision point.
If you want to know where you stand today and what it would take to be truly due diligence ready, get in touch with us and we will give you a straight answer.
Frequently Asked Questions
How long does a typical due diligence process take, and how can we speed it up?
A typical due diligence process runs anywhere from four to twelve weeks, depending on the complexity of the transaction and how prepared the target company is. The single biggest factor within your control is the quality and organisation of your data room. Companies that maintain clean, up-to-date financial records, well-structured contracts, and documented KPIs year-round can cut response times dramatically and reduce the risk of deal delays or value erosion caused by last-minute scrambling.
What is a virtual data room, and what should we include in it?
A virtual data room (VDR) is a secure, organised digital repository where you share confidential documents with buyers, investors, or their advisors during due diligence. It typically includes audited annual accounts, management reports, tax filings, employment contracts, shareholder agreements, customer and supplier contracts, IP documentation, and financial forecasts. Tools like Microsoft SharePoint or Google Drive can work for smaller transactions, but dedicated VDR platforms offer better access controls and audit trails for larger deals.
What are the most common red flags that surface during financial due diligence?
The most frequently flagged issues include revenue recognition inconsistencies, undisclosed liabilities or contingent obligations, customer concentration risk (where a large share of revenue depends on one or two clients), normalisation adjustments that inflate EBITDA, and weak or undocumented financial controls. Forecasts that cannot be supported by historical trends or clear assumptions are also a major concern for investors. Identifying and addressing these issues before the process starts is far better than trying to explain them under pressure.
Do we need audited financial statements to go through due diligence?
Audited financials are not always a legal requirement for due diligence, but they significantly strengthen your position. They provide the buyer or investor with a verified baseline, reduce the time spent re-checking historical numbers, and signal that your reporting is credible and independently confirmed. If your company is not yet subject to mandatory audit requirements, having at least reviewed or compiled financials prepared by an external accountant is strongly advisable before entering any serious transaction process.
How is due diligence different when we are raising a funding round versus being acquired?
The scope and intensity differ considerably. In an acquisition, due diligence is typically exhaustive across all workstreams — financial, legal, tax, HR, commercial, and technical — because the buyer is taking on full ownership and all associated liabilities. In a funding round, investors generally focus more heavily on financial performance, forecasts, the cap table, and key commercial metrics, though legal and IP reviews are still standard. Either way, the preparation required on your end is largely the same: organised documentation, credible forecasts, and a finance function that can respond quickly and clearly.
What is a Finance Maturity Assessment and when should we do one?
A Finance Maturity Assessment (FMA) is a structured review of your finance function — covering processes, systems, reporting quality, controls, and team capabilities — to identify gaps that could create risk or friction during a transaction. Ideally, you commission one at least six to twelve months before an anticipated funding round or exit, giving you enough time to act on the recommendations. Doing it too close to a deal leaves little room to fix structural weaknesses, which can directly affect valuation or deal terms.
Can a founder or internal CFO lead the due diligence preparation, or is external support necessary?
A capable internal CFO can absolutely lead the preparation, but external support adds significant value at critical moments. An experienced financial advisor or interim CFO brings transaction-specific expertise, knows exactly what buyers and investors will scrutinise, and can spot vulnerabilities that internal teams are too close to see. For founders going through their first exit or funding round, having an external partner who has been on both sides of the table is often the difference between a smooth process and a costly, stressful one.