Due Diligence Checklist for Buying a Business in Canada

Falling for a business is easy. The numbers on the first page look strong, the owner is personable, and the opportunity feels right. But the buyers who avoid expensive mistakes are the ones who slow down and verify everything before they commit. That process is called due diligence, and it's where good deals are confirmed and bad ones are caught.

This checklist walks through what to examine before buying a business in Canada. It's part of our complete guide to how to buy a business in Canada, and works alongside our guide to how to value a business in Canada.

1. Verify the financials — don't just trust them

The asking price is built on the business's earnings, so those earnings must be real and documented. Request at least three years of financial statements and tax returns, and confirm they match each other. Scrutinize how Seller's Discretionary Earnings (SDE) were calculated — which expenses were added back, and are those add-backs legitimate? If a business reports strong cash flow but can't produce clean records to prove it, treat the numbers with caution.

2. Understand where the revenue really comes from

A business dependent on one or two large customers is riskier than one with a broad base. Ask for a breakdown of revenue by customer and by product or service. If losing a single client would seriously damage the business, that concentration risk should be reflected in the price. Also check whether revenue depends on the current owner's personal relationships — those don't always transfer to a new owner.

3. Review the operations and assets

Financials tell part of the story; operations tell the rest. Examine:

• Lease — how long remains, and can it be transferred or renewed?
• Equipment and assets — condition, age, and what's included in the sale.
• Suppliers — key supplier relationships and whether contracts transfer.
• Staff — who are the key employees, and will they stay after the sale?
• Inventory — its value and condition, if applicable.

4. Check the legal and regulatory side

Confirm the business has all required licences and permits and that they're transferable. Check for outstanding debts, liens, or legal disputes. Make sure the business complies with the regulations of its industry. An otherwise healthy business with an expiring lease, a non-transferable licence, or a pending lawsuit is not the bargain it appears to be. This is where a business lawyer earns their fee — you can find qualified professionals in the BizListings advisor directory.

5. Understand why the owner is really selling

"Retirement" is a common and often genuine reason — but it's worth understanding the true motivation, because it can reveal problems the financials won't show: a new competitor, a major client about to leave, or equipment nearing the end of its life. Ask directly, then verify what you're told against the other evidence. Our list of key questions to ask before buying a business covers what to raise in that conversation.

6. Confirm what's included and how it's structured

Be clear on exactly what you're buying — assets, inventory, customer lists, intellectual property, the business name — and how the deal is structured. Most business sales are structured as an asset sale or a share sale, which have different legal and tax consequences; the closing section of our complete guide to buying a business in Canada covers how that choice affects you.

Bring in professionals

You don't have to do this alone, and you shouldn't. An accountant can validate the financials, and a lawyer can review contracts and structure the deal safely. The cost is small relative to the protection it provides on a purchase this significant. Your lender will expect the same diligence before approving financing.

The bottom line

Due diligence isn't about distrust — it's about buying with your eyes open, so the business you fall for turns out to be the business you actually get. Work through each area methodically, verify rather than assume, and involve professionals for the financial and legal pieces.

Once diligence is done, the deal structure comes next — see asset sale vs. share sale in Canada. Still deciding between an acquisition and a startup? See buying a business vs. starting one. Ready to apply this? Browse businesses for sale across Canada, and read the rest of our complete guide to buying a business in Canada.

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This guide is general information, not financial or legal advice. Always confirm with a qualified accountant, lawyer, or advisor before making decisions.

Before a seller shares the documents in this checklist, you will almost always sign a confidentiality agreement — see what an NDA is and why you sign one when buying a business.

Diligence normally starts once a letter of intent is signed, and what you verify depends on whether the deal is an asset sale or a share sale.

Download the asset sale vs. share sale due diligence checklist (PDF)