What to check before buying a business in Canada

Before you sign a letter of intent or pay a lawyer and an accountant to run formal due diligence, screen the business yourself. A pre-purchase screen works from what a seller will share informally — a summary of the numbers, a walk-through of the premises, a plain conversation about why they’re selling — and it tests one thing: whether the numbers plausibly hold together, the licences and key contracts actually transfer, and nothing about the deal is being rushed past you faster than the facts justify. Pass the screen and the deal is worth the professional fees and weeks that formal due diligence costs; fail it, and you have saved yourself both.

Screening comes before due diligence, not instead of it

Due diligence is the buyer’s structured investigation of a business before closing — reviewing financial records, contracts, legal standing, employees, assets and regulatory position against what the seller has represented — and it only starts once both sides have signed a letter of intent and the seller has agreed to open real books and records to outside review. The complete due diligence guide for Canadian buyers covers that formal stage end to end: who is involved, what a data room holds, and what happens when it turns something up. Screening is everything before that point. It happens while you are still one of several interested buyers, before either side has committed to anything in writing, and it draws only on what a seller volunteers, what is publicly checkable, and a short list of direct questions. How to buy a business in Canada places screening inside the wider sequence — after you have set your buying criteria and sourced candidates, and before you finance, formally verify and close.

Screening is also the part of the process a buyer can reasonably run alone. Whether you can do meaningful due diligence yourself, or need advisors involved from the start, comes down to which task you’re looking at: reading what a seller sends, visiting the business and checking its public footprint do not require a professional licence to do competently, which is more than can be said once you reach the reviews that come with financial statements, tax filings and contracts. Decide how much of that split you’re comfortable with before you are under time pressure to decide it. It also pays to set expectations about pace: once a deal clears your screen and moves to a signed letter of intent, how long due diligence itself takes has no fixed answer in Canadian law, and treating a timeframe from a different deal as a promise for this one is a common source of frustration on both sides.

Start with whether the numbers hold together

The first real test of a screen is whether the profit a seller describes survives being checked against something the seller does not control. How do I check whether a business actually makes money answers this directly: compare three independent records against each other — bank deposits, point-of-sale or sales-system totals, and what was actually filed with the CRA — because the seller’s own summary is the one document in that comparison that is not independent. Where a seller is willing to go further before any formal engagement, how do I verify a seller’s financial statements sets out how to cross-check those statements against tax returns and bank or merchant records without yet paying an accountant to do it for you.

Cash-handling businesses need a sharper version of the same test. How do I verify a business’s cash sales walks through comparing daily register or point-of-sale reports against bank deposits over a long enough run of days to catch a pattern rather than a lucky week, because cash revenue is both the easiest figure to inflate informally and the hardest one to verify from outside. None of this needs a data room or a signed letter of intent. A seller who will not show even a redacted version of these comparisons before you have committed anything in writing is itself useful information, and a seller whose records could not survive the comparison in the first place was never going to clear formal diligence either.

Find out what you would actually be inheriting

A business can look profitable and still come with liabilities that never show up on a summary income statement. How do I check a business for hidden debt starts with a lien and execution search against the corporation and, where relevant, the individual owner, plus confirmation of the status of any loans, leases and supplier arrears the seller has not already disclosed. A lien search checks the provincial personal property security registry — the same registry a PPSA registration is filed in to give a lender priority over a company’s assets — and running one against a target is standard practice before any asset purchase closes, not a step reserved for after a letter of intent.

Unpaid tax and payroll exposure is the liability that a casual read of the financials will not surface. How do I check a business for unpaid taxes covers asking the seller to request confirmation directly from the Canada Revenue Agency, and it is worth asking separately whether payroll source deductions have actually been remitted rather than simply accrued on the books — a gap that stays invisible until someone asks the CRA directly, and one an Ontario employer’s WSIB account can carry its own version of if premiums have fallen behind. It is also worth checking, through the federal register of individuals with significant control, that the people who actually control the business match who is negotiating with you, and confirming the corporation itself is on the books and in good standing with its home province’s registry — Ontario runs the Ontario Business Registry, and every other province keeps its own. How do I check for liens on business assets is worth running early precisely because it is cheap and fast, and it tells you whether the equipment or receivables you are pricing into the deal are already pledged to someone else.

Confirm the licences and permits actually transfer

A licence or permit is issued to a specific person or entity, and assuming it carries over with a change of ownership is one of the more expensive assumptions a buyer can make. Licence re-application is the general concept: applying fresh, in the buyer’s own name, rather than inheriting the seller’s standing, because most Canadian licences and registrations do not automatically follow a sale. Do trade licences transfer when I sell my business confirms the same is true of trade certifications — they belong to the individual who earned them, not to the business — and any licence tied personally to the seller in a way that cannot pass to any buyer at all is worth surfacing at the screening stage, not after a deposit is down.

Liquor licence transfer explains that a licence does not pass automatically when a bar, restaurant or retail store changes hands, and can I transfer my liquor licence when I sell answers the buyer-side version directly: in Ontario, the AGCO generally requires a fresh application or a formal transfer process, and the business typically cannot serve liquor under the old licence the moment ownership changes — other provinces run their own liquor authority and their own process. A food-service business carries a parallel check under its own food-premises rules, and any business built around a specific site or agreement — a zoning-dependent use, a franchise that requires the franchisor’s consent to a change of ownership — needs the same treatment: find out whether the transfer is even possible before you get attached to the deal. Whatever any of this takes, how long does licence transfer and landlord consent take is a useful reset — it runs on the regulator’s or landlord’s clock, not the buyer’s or seller’s, and there is no single Canadian rule that applies across every licence type or lease.

Look at who keeps the business running

How do I check employment records in due diligence covers requesting an accurate org chart and employment and payroll records even at an informal stage, because the shape of the answer — is this a team, or is it one person the business cannot function without — changes how you think about the deal before you have spent a dollar on advisors. A business that depends entirely on the owner’s personal relationships, technical knowledge or licence carries a specific risk a clean income statement will not show, and it is worth asking directly what would happen to revenue if the current owner took a month away from the business, and whether a collective agreement or a union relationship comes with the sale — both change what you are actually buying.

Test the relationships the business depends on

A customer list and a supplier base are only as good as their independence from the seller personally. How do I verify a seller’s customer list means cross-checking it against the invoicing or CRM system it actually came from, confirming how many of the largest accounts have a relationship with the business itself rather than with the owner by name, and understanding how concentrated revenue is in a small number of relationships that could walk on a change of ownership. How do I check a business’s supplier relationships covers the same risk from the other side: asking for written supply agreements where they exist, understanding how much of cost of goods sold rides on a single vendor, and checking whether the business’s key contracts are actually assignable to a new owner rather than silent, or worse, giving the counterparty a right to walk away or renegotiate the moment ownership changes. Where the business operates from leased premises, the lease itself is the contract most worth reading early, since a landlord’s consent to assign it is rarely automatic.

Look at the business the way a stranger would

A buyer who only ever sees a business through the seller’s eyes misses what a new customer sees first. How do I check a business’s online presence and reviews covers confirming who actually owns and administers the Google Business Profile, social accounts and website, since none of that is worth anything if it does not transfer with the sale, and reading review timing for the kind of pattern that suggests it was inflated rather than earned. Confirming who actually owns the trademarks and domain names behind a business is worth doing at the same time, for the same reason — a brand you cannot legally use after closing is not the asset the listing implied, and if the business holds any meaningful amount of customer data, how it has actually been collected and stored is worth a plain question before you inherit the compliance obligation that comes with it. When a deal does move forward, how do I transfer domains and software licences when buying a business sets out the mechanics: a domain moves through the registrar with an authorization code, but most software licences and social accounts are not automatically assignable at all and have to be checked one by one rather than assumed to follow the sale.

Watch for the signs that show up before you have spent a dollar

Some problems announce themselves before you ever request a document. What are the red flags in a business for sale sets out the clearest ones: numbers that look unusually clean for a small cash-handling business, a reason for selling that shifts depending on who answers, dependence on one customer or relationship, and pressure to move faster than the process actually justifies. None of these proves a problem by itself, but each is a specific, answerable question, and how a seller reacts to being asked it is often more informative than the answer itself. That is a different, earlier thing from what does a genuine red flag in due diligence look like, which describes what a real problem looks like once you are inside a data room with professional advisors — an undisclosed liability, a number that will not reconcile after a real attempt, a dependency the seller was not upfront about. A screening-stage flag tells you to ask more questions before you commit to anything in writing; a diligence-stage flag tells you the deal itself may need to change.

Screening looks different depending on what the business actually is

Every business carries the checks above, and a meaningful share of the library beneath this page covers what only applies to what a business specifically does. Software and AI-native businesses are the biggest single cluster right now, and each variant carries its own screening quirk:

• AI agent platform due diligence — the audit trail behind every action an autonomous agent has actually taken, not just its output.
• AI business due diligence generally — four questions most buyers have not had to ask before an AI feature was part of the pitch.
• AI consulting practice due diligence — proof of delivered outcomes for past clients, not just the client logos on the website.
• AI content generation tool due diligence — where the training and fine-tuning data actually came from.
• AI document automation business due diligence — chain of title behind the models the product actually runs on.
• AI-enabled BPO business due diligence — which specific automation claims in the marketing are actually true.
• AI governance and compliance consulting practice due diligence — the documentation that proves the advice given was actually followed.
• AI implementation and integration business due diligence — whether results are attributable to the business or to the platforms it configures.
• AI infrastructure and GPU services business due diligence — capacity commitments and who actually owns the underlying hardware.
• AI recruiting technology business due diligence — bias and compliance exposure built into the matching model itself.
• AI sales and marketing automation business due diligence — how customer data is actually handled once it leaves the platform.
• AI search and retrieval platform due diligence — what rights the business actually holds to the content it has indexed.
• AI training and enablement business due diligence — who is actually delivering the training, and whether that person is staying on.
• Applied-AI product studio due diligence — contract-by-contract ownership of what was actually built for each client.
• The AI business buyer checklist gathers the version of this list built specifically for a buyer working through it.

Screening looks just as specific outside software. Accounting practice due diligence starts with the buyer’s own professional eligibility, before the client list matters at all. Advertising agency due diligence turns on the actual terms of the agency-of-record contracts, not the pitch deck. Aerospace parts manufacturer due diligence starts with the certification that keeps the plant eligible to supply at all.

• Affiliate marketing site due diligence — whether reported commission income is actually verifiable at the network level, not just in a dashboard screenshot.
• Agronomy services business due diligence — how much of the client roster is tied to one advisor’s personal relationships rather than to the business itself.
• Amazon FBA business due diligence — the trademark behind the brand registry the listing’s whole value is built on.
• Apparel DTC brand due diligence — trademark ownership, checked separately from the storefront and the supplier relationships behind it.
• Aquaculture operation due diligence — the tenure documents and an independent environmental read on the site.
• Architecture practice due diligence — every professional licence the practice’s work actually depends on.
• Audiology clinic due diligence — the items that do not show up cleanly in a standard financial review.
• Auto repair shops carry an entirely different set of checks — technician certification, hoist and diagnostic-equipment inspection status, and whether OMVIC registration applies if the shop also sells vehicles — gathered in the auto repair business buyer checklist.

Decide what the screen is telling you, and what happens next

A screen that raises no serious questions is a green light to spend real money, not proof the deal will close. Before you commit that spend, line up who needs to be involved and when: the buyer advisory team checklist sets out which professionals to engage and in what order — a lawyer and accountant before an offer goes out, financing lined up early, specialists brought in only where the specific deal calls for them — and the buyer financing readiness checklist lists what a lender will actually ask for, so you are not assembling it for the first time against a financing condition’s deadline. The business sale timeline checklist places all of this on a single sequence, from preparation through closing and the weeks after, so you can see roughly where you sit and where delays tend to creep in.

Formal due diligence and the advisors who run it cost real money, and it is worth planning for that cost before you are inside the process. How much does due diligence cost when buying a business explains that the figure is driven mainly by which advisors you engage and how complex the business is, not by a fixed schedule, and how do I budget for due diligence and legal fees is the practical version of the same point: those fees are paid out of pocket as the deal progresses, not out of the acquisition loan, because a lender generally will not advance financing until well into the process. Once you are ready to formalize the request list itself, the buyer due diligence checklist is the document that carries you from a passed screen into the structured review that follows — commercial and customer risk, physical and technology assets, and the questions a standard document request tends to miss.

Even a clean screen and a thorough diligence process don’t cover everything

Two things exist precisely because no amount of checking removes all risk. Reverse due diligence is the mirror image of everything above — the investigation a seller runs on a prospective buyer’s financial capacity and track record — and it is a reminder that you are being screened too, and that acting evasively during your own process costs you credibility with a seller you still need to close a deal with. Once you do close, the closing checklist is the master list of documents, signatures, consents and licence transfers a sale actually needs to complete — the practical proof that everything this screen and the diligence that followed it turned up has actually been resolved, not just discussed.

Where a screen and formal diligence still leave a gap — a risk you cannot fully verify before closing, or one a seller cannot fully substantiate — due diligence vs warranty protection explains the tool that exists for exactly that situation: a contractual warranty and remedy that covers what diligence did not or could not find. It is a complement to checking things yourself, not a substitute for it, and leaning too hard on either one changes what actually protects a buyer after closing.