
Due Diligence When Buying a Business: A Lawyer’s Perspective
Buying an existing business can accelerate growth, but it also carries legal risk that is not always visible at the negotiation stage. From a legal standpoint, the greatest concern is not what is disclosed, but what remains undiscovered until after closing. Buyers often focus on revenue, assets, and goodwill, yet the more consequential issues tend to arise from liabilities that continue with the business.
Due diligence is the process through which those risks are identified and assessed before the transaction is completed. In Ontario, it plays a central role in determining not only whether a transaction should proceed, but also how it should be structured.
What Due Diligence Means in a Business Purchase
In practical terms, due diligence is the investigation of a target business to confirm its legal, financial, and operational position. From a legal perspective, the exercise is directed at three fundamental issues: identifying what is being acquired, understanding what obligations attach to it, and determining whether the business can continue to operate as intended after closing.
This process is not limited to verifying information provided by the seller. It requires independent review of corporate records, contracts, regulatory status, and potential claims that may not be immediately apparent.
Why Legal Due Diligence Matters
Financial review alone does not reveal the full risk profile of a business. Many of the most significant exposures arise from legal obligations that do not appear on financial statements. These may include restrictive contractual terms, unresolved disputes, regulatory deficiencies, or contingent liabilities.
Once a transaction closes, these issues often become the responsibility of the buyer. As a result, legal due diligence is not simply confirmatory; it is protective. It allows the buyer to identify risks early, quantify their impact, and address them through negotiation or restructuring.
Key Areas of Legal Review
A central component of due diligence is confirming the legal structure and ownership of the business. This includes verifying share ownership, reviewing corporate records, and identifying any restrictions that may affect the transfer. Deficiencies in corporate governance or unclear ownership can delay closing or, in some cases, undermine the validity of the transaction itself.
Where the business operates from leased premises, the commercial lease often becomes one of the most significant risk areas. Lease terms may restrict assignment, impose ongoing financial obligations, or expose the buyer to personal liability. These issues are frequently underestimated until late in the process, at which point they can affect both value and timing.
Contracts with customers, suppliers, and other third parties must also be reviewed carefully. The key issue is not only what the contracts provide, but whether they can continue after closing. Change-of-control provisions, consent requirements, or termination rights can disrupt operations if not addressed in advance.
Employment-related obligations represent another area of potential exposure. Buyers may inherit liabilities relating to employee entitlements, misclassification of contractors, or non-compliance with employment standards. These risks can arise even where the underlying issue predates the purchase.
In addition, due diligence must consider existing or potential disputes. Ongoing litigation, regulatory investigations, or unresolved claims can materially affect both the value of the business and its future operations.
Regulatory compliance is equally important. Certain businesses require licences or permits that may not transfer automatically. If these approvals cannot be maintained or reissued, the buyer may face restrictions on operating the business after closing.
Finally, a search of secured interests is necessary to determine whether assets are subject to existing claims. Security registered under Ontario’s personal property regime, including general security agreements, can affect the buyer’s ability to take clear title if not properly discharged.
The Role of Deal Structure
The scope and intensity of due diligence depend in part on whether the transaction is structured as an asset purchase or a share purchase. In a share purchase, the buyer acquires the corporation itself, including its historical liabilities. This requires a more comprehensive review. In an asset purchase, the buyer may limit exposure by selecting specific assets, but only if the transaction is properly structured and documented.
In either case, due diligence informs the appropriate structure and helps ensure that risk is allocated in a way that reflects the realities of the business.
Identifying Risk and Adjusting the Transaction
The purpose of due diligence is not to prevent transactions, but to ensure they proceed on informed terms. Where risks are identified, they may be addressed through adjustments to price, the inclusion of indemnities, or the use of holdbacks to secure potential claims. In some cases, the appropriate outcome may be to reconsider or delay the transaction.
The Importance of Early Legal Involvement
Legal involvement is most effective when it begins early in the process. Waiting until after key terms have been agreed, particularly at the letter of intent stage, can limit flexibility and reduce negotiating leverage. Early review allows the buyer to structure the transaction appropriately and preserve the ability to respond to issues as they arise.
How Kalfa Law Firm Assists
At Kalfa Law we assist buyers throughout the acquisition process, from initial structuring to closing. Our approach to due diligence is focused on identifying legal risk, assessing its practical impact, and ensuring that the transaction is structured to protect the client’s interests. This includes reviewing corporate records, analyzing key contracts, assessing regulatory compliance, and advising on risk allocation within the purchase agreement.
FAQs:
Shira Kalfa, BA, JD, Partner and Founder
Shira Kalfa is the founding partner of Kalfa Law Firm. Shira’s practice is focused in corporate-commercial and private M&A law including corporate reorganizations, corporate restructuring, mergers and acquisitions, commercial financing, secured lending and transactional law.
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The above provides information of a general nature only. This does not constitute legal or accounting advice. All transactions or circumstances vary, and specified legal advice is required to meet your particular needs. If you have a legal question you should consult with a lawyer.










