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An accountant helps with a business valuation by turning your books into a defensible price: they clean up the earnings, pick a method, and show what a buyer, a partner or the tax authority would accept. The number matters most when it drives tax. Sell qualifying shares and the lifetime capital gains exemption can shelter up to $1,250,000 of the gain, so the value on paper decides how much of it you can use.
What does a business valuation actually need?
It needs clean, consistent numbers, and this is where most of the accountant’s time goes. Three to five years of financial statements are the usual starting point, along with tax returns, a list of assets and debts, and any contracts that tie customers or staff to the company.
Then come the adjustments. Owners often pay themselves oddly, run personal costs through the business, or hold a one-off contract that inflates last year’s profit. An accountant strips those out to show what the business earns in an ordinary year. That’s the figure everything else is built on.
How do accountants set the value?
Three approaches are common, and the right one depends on what you own. We’re describing general practice here, not a rule set by law.
| Approach | Built on | Fits best |
|---|---|---|
| Earnings | Adjusted yearly profit and a multiple or return | Service firms, steady shops |
| Assets | What the company owns minus what it owes | Property, equipment or holding companies |
| Market | Prices paid for similar businesses | Where comparable sales exist |
The multiple is the soft spot. Two honest experts can pick different ones and get results that differ by a lot. We couldn’t find an official source for typical multiples, so be wary of any page that quotes one for your industry.
Why does the tax side matter?
Because a sale creates a gain, and gains are taxed. Say you built a company, your cost base is $100,000, and someone pays $400,000 for the shares. That’s a $300,000 gain. The capital gains tax calculator adds half of it, $150,000, to your income. With $80,000 of other income in Ontario the extra tax comes to $63,691.78, or 21.2% of the gain, and you keep $236,308.22.
That calculator applies the lifetime exemption only if you tick the box for qualified property. If your shares qualify, the real bill can be much lower, and sometimes nil. The CRA’s capital gains guide says the deduction covers qualified small business corporation shares and qualified farm or fishing property, and you claim it on form T657 and on line 25400 of your return. Do your shares qualify? That’s the sort of question a valuation report and a tax accountant answer together, because the tests look at how the company earned its money and who held the shares.
What else can a valuation be used for?
Selling is only one case. Owners also order one when a partner leaves or a shareholder buys in, when a family member takes over, when they divorce, or when they need to settle an estate. In each case somebody on the other side wants proof that the price is fair.
For a buyer, the report shows what they’re paying for and where the risks sit. For you, it sets a starting price you can defend when the offer comes in low. A report from someone with no stake in the deal carries more weight than a number you made up in the car.
Where do valuations go wrong?
- Using one year of profit. A single great or awful year misleads.
- Forgetting to charge a fair salary for the owner’s own work.
- Ignoring tax on the way out. The buyer pays the price, but you pay the tax.
- Treating a rule of thumb from the internet as a valuation.
- Leaving the books unreconciled, so the accountant has to guess.
Here’s a small example of the salary point. Suppose the business shows $100,000 of profit while you pay yourself $40,000. If replacing you would cost $70,000, the adjusted profit is $70,000, not $100,000. The valuation falls with it. That’s arithmetic, not a market figure, but it shows why the adjustment step is worth paying for.
The company’s own tax matters as well. The corporate tax calculator shows $11,696 of tax on $100,000 of active business income in Ontario for a calendar 2026 year, which leaves $88,304 in the company. If you plan to take that money out, the dividend tax calculator shows how much tax comes with it. On $10,000 of dividends in Ontario the calculator shows $788.97 of extra tax.
What should you ask before you hire one?
Ask which method they’d use and why, what they need from you, and how long it takes. Ask whether the report is meant for a sale, a tax filing or a dispute, since the purpose changes how it’s written. And ask for the fee in writing before the work begins. We couldn’t confirm typical fees, so we don’t quote any.
Ask about their experience with your kind of business too. A shop with inventory and a software firm with recurring subscriptions don’t get valued the same way, and an accountant who has done five of yours will spot problems faster.
Common questions about valuations
How long does one take? It depends mostly on how tidy your records are. Neat books can shorten the job a lot, and a pile of loose receipts can double it.
Can I value my own business? You can get a rough idea, but a buyer, a bank or the CRA will give far more weight to someone independent. If the number drives a sale or a tax claim, pay for the report.
Is the value the same as the sale price? Not always. A valuation says what the business is worth on a set of assumptions. The price is whatever a real buyer will pay, and negotiation, timing and terms push it either way.
What this page is based on
The exemption amount and the form numbers come from the Canada Revenue Agency‘s page on the capital gains deduction, which gives $1,250,000 for 2025. The limit is indexed after that, so check the current year before you plan around it. Tax examples come from this site’s calculators, which use 2026 rates. This site is independent and isn’t connected to any government.
Frequently asked questions
What documents does an accountant need for a valuation?
Usually three to five years of financial statements and tax returns, a list of assets and debts, and key contracts.
Which valuation method is used?
It depends on the business. Earnings, assets and market comparisons are the common ones, and an accountant may use more than one.
Does a valuation affect my tax?
Yes. The value sets the gain on a sale, and for qualifying shares it decides how much of the lifetime capital gains exemption you can use.
How much is the lifetime capital gains exemption?
The CRA lists $1,250,000 for 2025 for qualified small business corporation shares and qualified farm or fishing property. Check the page for the current year.
Can I value my business myself?
You can get a rough idea from your earnings. For a sale, a buy-in or a dispute, an outside report carries more weight.
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