M&A Due Diligence: The Red Flags That Kill Deals
Due diligence is the final boss of an M&A process. This guide breaks down the most common red flags that kill deals and gives you a tactical playbook to get your house in order before the buyer walks in.
TL;DR: M&A due diligence is an exhaustive audit of your company. Acquirers look for red flags in four main areas: financials, legal/IP, team/culture, and product/customers. The biggest deal-killer is not the existence of problems, but undisclosed surprises. Proactively identifying and addressing issues like poor financial controls, unclear IP ownership, or high customer concentration is critical to closing the deal.
Key takeaways
- Audit your financials for the 12-18 months pre-diligence. Look for inconsistencies, revenue concentration, and weak cash flow.
- Ensure every line of code and piece of IP is owned by the company, with clear assignment from all employees and contractors.
- Identify key-person dependencies. Have a plan for who runs what if a critical team member leaves post-acquisition.
- Not every red flag is a deal-killer. Proactively disclosing and proposing a solution can build trust and save the deal.
- The biggest red flag of all is a surprise. Be ruthlessly honest with your data room and your acquirer.
- A deal is not closed until the money is in the bank. Stay focused on running the business through the entire diligence process.
Your House Must Be in Order
M&A due diligence is a forensic audit of your business. The buyer’s goal is to verify your claims, uncover hidden risks, and confirm the strategic value of the acquisition. It is intense, invasive, and exhausting. If you aren’t prepared, it will kill your deal.
An acquirer isn't looking for a perfect company. They are looking for a company they understand. The biggest red flag is not the existence of a problem—it’s a problem you didn’t disclose. Surprises destroy trust, and trust is the currency of a successful acquisition.
This guide outlines the major red flags that kill deals, framed so you can get your house in order *before* you enter a process. Most of these can be mitigated, but only if you find them first.
Financial Red Flags: Numbers Don’t Lie
Your financials are the first wall the diligence team will try to breach. They will have a team of accountants—often from a Big Four firm—combing through every transaction. Your job is to make their job easy and predictable.
The Checklist: Audit Yourself First
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