Insurance Due Diligence: The Unsung Hero of Mergers & Acquisitions
29th September 2025
Due Diligence refers to the process of thoroughly investigating and assessing a business, person, or transaction before making a commitment, whether it’s buying a company, entering a partnership, signing a major contract, or investing.
It’s essentially a risk management and fact-checking exercise with the goal being to ensure that all relevant information is gathered, verified, and analysed so that you can make informed decisions and avoid unpleasant surprises later.
When it comes to mergers and acquisitions, most of the spotlight tends to fall on areas such as financials, operations, legals, and commercial. But there’s a quieter, often underestimated player in the room: insurance due diligence.
Whether you’re buying a business, investing in a new venture, or restructuring your organisation, understanding the insurance landscape of the company is essential.
At Caunce O’Hara Insurance Brokers Ltd (COHIBL), we believe that understanding this process is not just a box-ticking exercise, but a strategic advantage.
What Is Insurance Due Diligence?
Insurance due diligence is the process of reviewing and analysing the insurance policies, claims history, and risk exposures of a company to assess cover adequacy, and potential liabilities.
It’s typically conducted during mergers and acquisitions, but it’s equally valuable in other strategic transactions or when onboarding new suppliers or partners. Think of it as a health check for a company’s insurance programme.
The insurance due diligence process involves:
- Reviewing existing policies and cover levels
- Identifying gaps or overlaps in protection
- Assessing claims history and insurer reliability
- Evaluating premium costs and terms
- Highlighting risks that may not be covered (e.g. cyber liability, environmental exposure)
Keeping things confidential during due diligence isn’t just good practice – it’s absolutely essential. You’re often dealing with sensitive details that, if shared in the wrong way, could cause real issues for everyone involved. Putting the right safeguards in place, like NDAs and clear communication protocols, helps build trust and keeps the process running smoothly.
Why It Matters in Mergers & Acquisitions
When dealing with mergers and acquisitions, surprises are rarely welcome, and insurance due diligence plays a critical role in ensuring a smooth transition.
From a buyer perspective, the insurance due diligence process helps uncover hidden liabilities, assess the quality of risk management, and ensure that you aren’t walking into a financial minefield. Uncovered risks or pending claims can affect the valuation of a business and insurance due diligence helps ensure the price reflects the true risk profile. It allows you to negotiate better terms, potentially adjust the purchase price, or require remedial actions before completion.
From the position of the seller of a business, ensuring your business has appropriate insurance policies in place can help to maintain, or even enhance the sale value. Comprehensive insurance cover is often a sign of a well-managed business. It shows that the company understands its risks and has taken steps to mitigate them. Also, your business is more attractive to buyers and investors if you have already addressed emerging risks, such as cyber liability insurance for example.
Key Areas Assessed During Insurance Due Diligence
The in-depth insurance due diligence review starts at the beginning as if the portfolio of insurance products is being built from scratch. It analyses the current arrangements, identifying what is right and what isn’t. Robust advice is provided around the risks which emanate from the mergers and acquisitions process in both the build up to completion and post-acquisition.
Each due diligence exercise is tailored to the type of business / sector, but all exercises will typically include reviewing the following key areas:
| Area | What’s Reviewed | Why It Matters |
| Policy Cover | Types of insurance (e.g. liability, property, cyber, D&O) and their limits | Ensures the business is adequately protected whilst meeting its regulatory or contractual requirements |
| Claims History | Past and pending claims, frequency, and severity | Reveals patterns of risk or poor management |
| Exclusions & Gaps | What’s not covered or underinsured | Identifies potential financial exposure |
| Premium Costs | Current and historical premiums | Helps assess cost efficiency and future budgeting |
| Insurer Financial Strength | Credit ratings and solvency of insurers | Ensures claims will be paid if needed |
| Contracts & Agreements | Standard contracts, templates, term of business, engagement letters | Ensuring that there is synergy / they are ‘back to back’ with your insurance covers |
Common Misconceptions About Insurance Due Diligence
Some of the common misconceptions that we’ve seen crop up during mergers and acquisitions discussions are things like, “the legals will catch any insurance issues”, or, “if there’s a policy in place, we’re covered”.
Many insurance policies have clauses for change of control / ownership, therefore they cannot be relied upon to continue ‘as is’. As a purchaser, you need to be aware of what will happen to the cover upon completion. Due diligence will help, as a mergers and acquisitions event is a material circumstance that is notifiable to insurers. It’s better you understand what the provisions are in the policy before letting insurers know.
Real-World Impact: A Quick Case Study
We recently undertook a due diligence for a client that was acquiring a tech company with a seemingly clean record. But during insurance due diligence, it was revealed that:
- they’d had a data breach within the past two years.
- their professional indemnity policy had a £250,000 limit, meaning it was inadequate.
Without this insight, the buyer could face millions in liabilities and a damaged reputation. With it, they can renegotiate the deal, require remedial action, or walk away entirely.
The Benefits to You as a Client
Whether you’re a buyer, investor, or advisor, insurance due diligence offers tangible benefits:
✅ Peace of mind: Know exactly what risks you’re inheriting.
✅ Stronger negotiating position: Use findings to adjust price or terms.
✅ Better integration planning: Identify where new cover is needed post-deal.
✅ Potential savings: Understanding where there are overlaps or unnecessary covers.
Due Diligence Services at Caunce O’Hara Insurance Brokers Ltd
Insurance due diligence isn’t just about ticking boxes or checking a few documents. It’s about protecting your investment, reputation, and future operations. At Caunce O’Hara, we help clients navigate this complex but crucial process with clarity, confidence, and commercial insight – so you can be sure that the correct advice is received.
During our insurance due diligence exercise, we will confidentially provide professional advice on the existing insurance arrangements of your target business. We will identify any risks posed and outline if their current insurance programme sufficiently protects against these risks.
If we have concerns with the existing programme in place, we will make recommendations on how to mitigate any failings in the insurance programme, and action these for you, should we become your appointed broker.
If you’re planning a merger, acquisition, or investment, don’t overlook the insurance.