What are the biggest risks when buying a business?

Every acquisition carries risk, and the goal of due diligence is to identify and price that risk rather than pretend it isn’t there. A handful of risk categories show up again and again in small and mid-size business deals in Canada, and buyers who know what to look for catch most of them before closing.

Financial misrepresentation

Reported earnings can be overstated through aggressive add-backs, revenue recognized before it’s actually collected, or expenses pushed into a period after the sale. This is why independent verification against tax filings and bank records matters more than the seller’s summary, and why a purchase agreement should include representations the seller stands behind.

Undisclosed debts and legal exposure

A business can carry liabilities that don’t show up on a simple balance sheet, including unpaid CRA remittances, registered liens against its assets, or pending legal claims. These obligations can attach to the business itself, particularly in a share sale, which is one reason both deal structure and a lien search matter before closing.

Key-person and relationship dependence

Many small businesses run almost entirely on the owner’s personal relationships with customers, suppliers, or referral sources, and that goodwill doesn’t automatically transfer with a signature. Ask directly how much of the business depends on the current owner personally, and plan a transition period that gives customers and staff time to build trust in you.

Customer and revenue concentration

• A business where one or two customers make up a large share of revenue is exposed if either one leaves after a change in ownership.
• Check contract terms and payment history with major customers, not just their current spend, to gauge how likely they are to stay.
• Ask whether pricing, terms, or volume with key customers were ever renegotiated, since that history predicts what happens after closing.