Professional Corp Sale LCGE Calculator 2026 Quebec: Your Exact Number by Income, Age, and Province

You built a professional corporation in Quebec over 15 or 20 years. Now a buyer is offering $2.5M for the shares, and you need to know one number: what do you actually keep after tax? The answer depends on whether the Lifetime Capital Gains Exemption (LCGE) applies to your sale, how much of it you've already used, and whether your professional regulatory body allows a share sale in the first place. This calculator gives you that number. For background on how capital gains tax works in Canada, start there.

Your Professional Corp Sale Calculator

Plug in your sale price, adjusted cost base, other income in the year of sale, and province. The calculator computes your capital gain, applies the LCGE if your shares qualify as QSBC, and shows your estimated tax bill at current 2026 combined federal + provincial rates. Toggle the 5-year capital gains reserve to see the installment-sale comparison.

The $333,000 Question: QSBC Qualification for Professional Corps

On a $2.5M professional corporation sale with a $100K cost base, the LCGE shelters $1,250,000 of the $2,400,000 capital gain. At Quebec's top combined rate of 53.31%, that shelter is worth approximately $333,000. But it only applies if the shares qualify as QSBC shares under ITA s. 110.6. Three tests:

Professional corporations are uniquely vulnerable to failing the 90% test. A Quebec dentist, lawyer, or physician who built the practice over 20 years often has substantial retained earnings sitting in corporate GICs, mutual funds, or a corporate-owned life insurance policy. A professional corp worth $2.5M with $400K in passive investments and a $150K insurance CSV is at $2.5M total / $550K passive = 78% active. That fails at the 90% threshold.

How to Purify Before the Sale

The standard fix is a pre-sale “purification” — removing passive assets from the corporation before the sale date. Options:

• Pay a dividend to yourself: Extract the excess cash or investments as a taxable dividend before the sale. You'll pay dividend tax now, but you preserve the $333,000 LCGE shelter. The math almost always favours the dividend.
• Transfer passive assets to a holding company: Use an ITA s. 85 rollover to move passive investments to a separate holdco at tax cost. The operating professional corp is left with only active assets. Timing matters — this may restart the 24-month holding period on the operating company shares.
• Repay shareholder loans: If the corporation owes you a shareholder loan, repaying it reduces corporate assets without triggering tax.

The critical point: purification must be complete before the sale closes. An accountant who has done professional-corp dispositions in Quebec should run the 90% test calculation on the exact date of the anticipated closing.

Worked Example: $2.5M Quebec Dental Practice

A Laval dentist, age 58, sells her incorporated dental practice for $2.5M (share sale). She incorporated 22 years ago with $100,000 of initial capital. She has never previously used her LCGE. Her other income in the year of sale is $150,000 from locum work.

Without the LCGE — say the shares failed the 90% test because of $400K in corporate investments — the full $2,400,000 gain at 50% inclusion produces $1,200,000 of taxable income. Combined federal + Quebec tax at the top rate: approximately $640,000. After-tax proceeds: $1,860,000. The LCGE is worth $333,000 on this single transaction.

Share Sale vs. Asset Sale: The Structure That Changes Everything

This is the decision that determines whether the LCGE applies at all.

The asset-sale path also triggers a layer of double taxation: the corporation pays corporate tax on the asset gains, then you pay personal tax when extracting the after-tax proceeds as dividends. The combined effective rate can exceed 60% on some asset categories.

Quebec Professional Regulatory Bodies and Share Transfers

In Quebec, professional corporations are governed by the Professional Code and each profession's specific regulations. The Collège des médecins du Québec (CMQ), Ordre des dentistes du Québec (ODQ), Barreau du Québec, and other orders have rules about who can hold shares in a professional corporation. Generally, only members of the profession (or a closely related professional) can be shareholders. This means your buyer pool for a share sale is limited to other licensed professionals in your field — which can affect sale price and timeline.

Province-by-Province: What Your $2.5M Sale Costs Across Canada

Same $2.5M sale, same $100K ACB, full LCGE applied. The only variable is province of residence.

The spread between Quebec (53.31%) and Saskatchewan (47.50%) on $575,000 of taxable gain is approximately $33,400. That is not a reason to relocate — but if you're already planning a move for retirement, the timing of your sale relative to your change of residence matters. The tax applies based on your province of residence on December 31 of the year of sale.

The 5-Year Capital Gains Reserve: Installment-Sale Tax Savings

If your buyer is paying in installments, ITA s. 40(1)(a)(iii) lets you spread the capital gain over up to 5 years. On the unsheltered portion of a $2.5M professional corp sale, the reserve can save $40,000–$70,000 by keeping each year's income in lower brackets.

The catch: the buyer must actually pay in installments for the reserve to apply. You can't take a lump sum and then claim the reserve. And the reserve is mandatory — you must include at least 20% of the gain per year (the gain is fully recognized by year 5).

Toggle the “5-year capital gains reserve” checkbox in the calculator above to see the comparison for your numbers. The savings are most significant when the unsheltered gain exceeds $500,000 and your other income drops significantly after the sale year (typical for a professional leaving practice).

Intergenerational Transfers: Passing the Practice to Your Child

The January 2024 amendments to ITA s. 84.1 expanded the rules for transferring a business to the next generation while using the LCGE. But professional corporations face a structural constraint: your child must hold the same professional licence. A Quebec dentist can only sell practice shares to another licensed dentist. If your child is a dentist, the intergenerational rules allow a share transfer that uses your LCGE while keeping the practice in the family — subject to a 36-month gradual transfer timeline and the requirement that the child be an arm's-length employee of the business.

For more on how the LCGE works on consulting and professional practice sales, or the broader mechanics of lump sum vs. installment vs. deferral on family business sales, those articles walk through the full decision tree.

Pre-Sale Checklist for Quebec Professional Corp Owners

See also: how the LCGE decision tree works for professional corporation owners across Canada and the Quebec-specific tax deployment for executive severance and capital gains.