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How Much Is a Small Business Worth? Valuation Basics for Ontario Buyers

A plain-language guide to how small business valuation works in Ontario, so you can sanity-check a seller's asking price before you make an offer.

Buying & Selling a Business6 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • Business valuation is not a precise science.
  • Professionals generally use some combination of the following approaches, then weigh them based on the type of business.
  • Even a careful valuation is only as good as the information behind it.

An asking price is just that — a price the seller has chosen to ask. It might be based on a professional valuation, a rule of thumb the seller read somewhere, sentimental attachment, or simply what they'd like to retire on. Before you make an offer on a small business in Ontario, it helps to understand the basic approaches professionals use to estimate what a business is actually worth, so you can judge the asking price against something more solid than the seller's word.

This article isn't a substitute for a professional valuation — for anything beyond a very small deal, a business valuator or accountant should be involved. But understanding the basic frameworks will help you ask better questions and negotiate from a more informed position.

Why There's No Single "Right" Number

Business valuation is not a precise science. Two qualified valuators looking at the same set of financials can reasonably arrive at different figures, because valuation depends on judgment calls: which earnings to count, how much risk to attach to the business's future, and how comparable "similar" sales really are. Treat any valuation — including your own — as a well-reasoned estimate, not a fact.

Three Common Approaches to Valuation

Professionals generally use some combination of the following approaches, then weigh them based on the type of business.

Asset-Based Valuation

This approach adds up the fair value of the business's tangible and identifiable assets — equipment, inventory, receivables, real property — and subtracts liabilities. It tends to understate the value of a profitable operating business, because it largely ignores goodwill and future earning power, but it sets a useful floor: a business is rarely worth less than the value of what it owns, net of debt.

Earnings-Based Valuation

This approach values the business based on the income it's expected to generate going forward, often starting from a "normalized" earnings figure that adds back one-time expenses, owner's personal expenses run through the business, and above- or below-market owner compensation. Earnings-based approaches are common for profitable operating businesses, but they depend heavily on how conservatively, or optimistically, those normalization adjustments are made — this is a common area where seller and buyer disagree.

Market-Based Valuation

This approach looks at what comparable businesses have actually sold for, adjusted for differences in size, industry, location, and risk. Reliable comparable data is harder to find for small private businesses than for public companies or real estate, which limits how much weight this approach can carry on its own for many small Ontario deals.

ApproachWhat it measuresWhere it's strongestWhere it's weakest
Asset-basedNet value of what the business ownsAsset-heavy or low-profit businessesUndervalues goodwill and growth
Earnings-basedOngoing income-generating capacityEstablished, profitable operationsSensitive to normalization assumptions
Market-basedWhat similar businesses have sold forIndustries with good comparable dataLimited comparable data for small private deals

Most professional valuations blend more than one approach and use judgment to reconcile the results, rather than relying on a single method in isolation.

What a Valuation Approach Can Miss

Even a careful valuation is only as good as the information behind it. Buyers should be alert to factors that a formula-driven valuation can understate:

A valuation tells you what a business might be worth on paper. Due diligence tells you whether that number will hold up in reality.

From Valuation to Offer: How Price Gets Negotiated

A valuation is a starting point, not a final price. In practice, the number that ends up in the purchase agreement is usually shaped by several additional steps:

  1. A letter of intent (LOI) sets out a proposed price and key terms — typically non-binding on price itself, even though certain other clauses within it, such as confidentiality and exclusivity, are often made binding even at this early stage.
  2. Due diligence either confirms the assumptions behind the valuation or surfaces issues that lead to a lower offer, added conditions, or a walk-away.
  3. A working capital adjustment is commonly built into the purchase agreement, comparing an estimated closing financial position to the actual position at closing, and adjusting the price accordingly.
  4. Holdbacks or earn-outs can bridge a genuine disagreement about value by tying part of the price to the business's performance after closing, rather than forcing agreement on a single number upfront.

Frequently asked questions

Do I need a professional valuator, or can I estimate value myself?

For a very small purchase, an informed buyer working with an accountant may be able to sanity-check an asking price without a formal valuation report. For anything larger, financing-dependent, or where family or business partners are involved, an independent professional valuation is generally worth the cost.

Is the seller's own valuation reliable?

Treat it as one input, not the final word. A valuation commissioned and paid for by the seller is not necessarily wrong, but it was prepared with the seller's interests in mind — an independent second opinion protects you as the buyer.

Why do "add-backs" to earnings matter so much?

Sellers often add back personal or one-time expenses to show higher "true" profitability. Some add-backs are legitimate; others are aggressive. Since earnings-based valuations are sensitive to this number, scrutinizing each add-back individually is one of the highest-value things a buyer's accountant can do.

Does valuation change depending on whether it's an asset or share deal?

Yes, indirectly. The two structures carry different tax consequences and liability exposure for buyer and seller, which affects what each side is willing to accept as a fair price even for the same underlying business.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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