Buying a Business? Legal Due Diligence Mistakes That Kill Deals

Introduction 

Acquiring another business can be a powerful growth strategy - but it’s also one of the riskiest moves a startup can make. If you don’t know what you’re buying, you could inherit a legal mess that sinks your own business. From hidden liabilities to IP ownership issues, the dangers are real - and often invisible without proper legal due diligence.

In this blog, we’ll flag key considerations to help you prepare for external acquisitions - because prevention is always better than the cure. Legal issues are often overlooked as founders focus on the big launch or the issue of the day - and in a startup, there’s always an issue of the day.

Why this topic is important

This can be an important issue for start-ups because:

◼️Hidden Liabilities: You may inherit lawsuits, debts, or regulatory breaches.

◼️IP Ownership: The target company may not own its core assets.

◼️Contractual Risks: Key contracts may be non-transferable or contain change-of-control clauses.

◼️Employee Issues: Unseen HR problems can lead to post-acquisition disputes.

◼️Compliance Gaps: The target may be non-compliant with laws or licenses.

◼️Tax Exposure: Poor structuring can trigger unexpected tax bills.

◼️Valuation Errors: Without due diligence, you may overpay.

◼️Integration Problems: Legal misalignment can derail post-deal operations.

◼️Reputation Risk: Acquiring a tainted brand can damage yours.

◼️Investor Pushback: Poor diligence undermines investor confidence.

Q: What is legal due diligence in an acquisition?
A: It’s the process of reviewing a target company’s legal, financial, and operational risks before completing a purchase.

Consequences of not addressing these issues

The consequences of not attending to this issue may include the following:

1. Legal Implications

◼️Inherited Litigation: You may become liable for lawsuits filed against the target.

◼️IP Disputes: If IP isn’t properly assigned, you may not own what you think you bought.

◼️Contract Breaches: Acquiring without consent may trigger termination clauses.

2. Commercial Implications

◼️Overpayment: You may pay a premium for a business with hidden problems.

◼️Lost Customers: Poor integration or legal disputes can drive clients away.

◼️Brand Damage: Association with a legally troubled company can hurt your image.

3. Operational Implications

◼️Integration Delays: Legal issues can stall or derail post-acquisition plans.

◼️Team Disruption: Cultural and contractual misalignment can lead to attrition.

4. Biz Valuation Issues

◼️Investor Concerns: Poor diligence can reduce your credibility and valuation.

◼️Write-Downs: You may need to impair the value of the acquisition post-deal.

These are indicative issues - the relevance of which will depend on your circumstances including the nature of business undertaken by your start-up.

What you need to be doing

We have identified quite a number of potential issues that the start-up needs to consider and below are some examples of the types of steps you might want to consider taking to address these issues considered above.

Conduct Legal Due Diligence

Review corporate structure, contracts, IP, litigation, compliance, and employment matters.

Engage Legal Advisors Early

Use experienced M&A counsel to guide the process and flag red flags.

Structure the Deal Carefully

Choose between asset purchase or share purchase based on risk and tax implications.

Negotiate Warranties & Indemnities

Protect yourself with contractual promises and remedies for hidden issues.

Plan for Integration

Ensure legal systems, contracts, and teams can be merged smoothly.

The above suggestions are just a few of the steps you can consider taking. There are many more things that need to be done to ensure the associated risks are effectively and pragmatically dealt with.

Q: What’s the difference between an asset purchase and a share purchase?
A: In an asset purchase, you buy specific assets and liabilities. In a share purchase, you buy the entire company — including all its risks.

How these risks can play out

The IP That Wasn’t Theirs

A startup acquired a competitor only to discover the target’s core software was developed by a contractor — with no IP assignment. The acquirer had to rebuild the product from scratch.

The Tax Surprise

A founder bought a small e-commerce brand without checking its tax filings. Months later, the IRS came knocking with $120K in unpaid taxes and penalties.

The Deal That Fell Apart

A Series A startup rushed into an acquisition without legal review. When investors found out about unresolved litigation, they pulled out — and the deal collapsed.

Frequently Asked Questions

Q: Can I skip due diligence for a small acquisition?

A: No - even small deals can carry big risks.

Q: What documents are reviewed in legal due diligence?

A: Corporate records, contracts, IP, litigation history, compliance, employment, and tax filings.

Q: How long does legal due diligence take?

A: It depends on deal size, but typically 2–6 weeks.

Understanding the legal terminology

Due Diligence: A comprehensive review of a company’s legal and financial health before acquisition.

Indemnity Clause: A contractual promise to compensate for specific losses.

Change-of-Control Clause: A contract term that may trigger termination if ownership changes.

How GLS can help you

By building your legal team capability on the GLS platform, you will be capable of:

◼️Running fast, cost-effective legal due diligence

◼️Accessing M&A templates and checklists

◼️Structuring deals to minimize risk and tax exposure

◼️Managing post-acquisition legal integration

Final thoughts

Acquiring a business can be a game-changer - or a game-ender. If you don’t know what you’re buying, you’re gambling with your own company’s future. Legal due diligence isn’t optional - it’s your insurance policy.