Reviewed by Karim Eshqoor, Lawyer, Barbarian Law™ (LSO #83032R)
A sole proprietorship is you — debts and lawsuits included. A corporation is a separate legal person, which is where limited liability, lower active-business tax rates on retained earnings, and the lifetime capital gains exemption on qualifying share sales come from. Incorporate when earnings, risk, partners, or a future sale make “just me” the wrong permanent structure.
Every business in Ontario starts with the same quiet decision, usually made by not making it: you start selling, and congratulations — you’re a sole proprietor. That’s fine on day one. The question is when it stops being fine, because the gap between “just me” and “my corporation” is wider than most owners realize — in liability, in tax, and in what the business is eventually worth.
Barbarian Law™ incorporates Ontario businesses for clients across Aurora, York Region, and the GTA: articles, minute books, shareholder agreements, and the estate documents that complete an owner’s structure. Corporate · Fees · Wills · Contact.
What is the difference between a sole proprietorship and a corporation?
A sole proprietorship is you. Not a metaphor — legally, the business is you. Its income is your income, its debts are your debts, its lawsuits are your lawsuits. Setup is nearly free (register a business name if you’re not using your own), and you report business income on your personal return.
A corporation is a separate legal person. It owns the business, signs the contracts, earns the income, and carries the debts. You own its shares and control it as director, but you and it are legally distinct. That separation is where almost every advantage comes from.
Does incorporating protect your personal assets?
As a sole proprietor, there’s no line between business and personal assets. A contract gone wrong, an injured customer, a supplier debt the business can’t pay — creditors can reach your home, your savings, everything. A corporation puts a wall there: with exceptions (personal guarantees, director liability for certain taxes and wages, personal wrongdoing), business creditors are limited to business assets.
Two caveats. Banks and landlords routinely puncture the wall by demanding personal guarantees — which is why guarantee terms, and ILA on them, matter so much. And incorporation doesn’t replace insurance; it complements it.
How is a corporation taxed differently?
We’re lawyers, not accountants — run your numbers with your CPA — but the structure of the advantage is worth understanding.
Rate. A sole proprietor’s business income is taxed at personal marginal rates, up to 53.53% at the top Ontario bracket. A Canadian-controlled private corporation pays a combined small business rate of just 11.2% on its first $500,000 of active business income. That combined rate reflects Ontario’s cut from 3.2% to 2.2%, effective July 1, 2026; income earned before that date is taxed at the old rate.
Deferral. The low rate only helps on money you leave in the company. Pay it all out to yourself and you land roughly where the sole proprietor does. The win is for businesses earning more than the owner spends: retained profits are taxed at the low corporate rate now, and the rest waits until you take the money out. A common accounting rule of thumb: below roughly $50–80K of net income the costs outweigh the benefits; by $120K+ the annual savings are often five figures — treat as a rule of thumb, not advice.
The exit prize. Sell qualifying shares of a Canadian-controlled private corporation and the lifetime capital gains exemption — $1,275,000 per shareholder for 2026, indexed annually — can shelter the gain. A sole proprietor has no shares to sell, only assets, taxed far less kindly. If you ever plan to sell, this alone can justify incorporating years in advance, because qualifying carries holding-period conditions. Deal structure: share vs. asset purchase.
What else does incorporation get you?
Beyond liability and tax: contracts and credibility (many larger customers and lenders prefer or require dealing with a corporation), name protection in Ontario, continuity (the corporation survives you, and its shares can pass under a secondary will, sheltered from probate tax), and structure for partners and investors. You can’t give a partner 30% of a sole proprietorship, but shares divide cleanly — just sign a shareholder agreement while you’re at it.
What does incorporating cost?
Incorporation at Barbarian Law™
| Service | Price |
|---|---|
| Ontario incorporation, numbered company (incl. government filing fee) | $1,000 + HST |
| Ontario incorporation, named company (incl. filing fee and NUANS search) | $1,200 + HST |
| Shareholder agreements, minute books, amendments | $350/hour + HST |
Prices exclude HST and disbursements. Hourly work is billed against a written estimate you approve before work begins.
The other side of the ledger: government incorporation fees are modest ($300 to file articles of incorporation in Ontario, plus a name search for a named company), but the real costs are ongoing. A separate corporate tax return each year, accounting fees, a minute book that must actually be maintained, and less flexibility in using business losses against other personal income — a point in the sole proprietorship’s favour during early loss-making years. Incorporation is a commitment to running the business like an entity, not a hobby.
A corporation does not cover your guarantees
Banks and landlords often ask owners to guarantee corporate debts personally. Whatever you guarantee, you still owe.
When is it time to incorporate?
Incorporate when any of these become true: the business earns more than you need to live on; you’re signing contracts or leases with real downside; you’re hiring; you’re taking on a partner or investor; a customer requires it; you’re in a field with liability exposure; or a sale is even a distant ambition (start the LCGE clock). If you’re buying a franchise or applying for a liquor or cannabis licence, incorporate first — the structure should exist before the agreements name it.
Frequently asked questions
How much does it cost to incorporate in Ontario?
At Barbarian Law™, $1,000 plus HST for a numbered company and $1,200 plus HST for a named company, including the government filing fee and, for a named company, the NUANS search.
Should I incorporate provincially or federally?
A business operating only in Ontario usually incorporates provincially. A federal corporation gets name protection across Canada but must still register in each province where it carries on business.
Can I move my sole proprietorship into a corporation later?
Yes. The business assets are transferred to the new corporation, often on a tax-deferred basis with your accountant’s help.
The bottom line
Sole proprietorship is the right starting structure for a small, low-risk, early-stage business, and the wrong permanent one for a business that grows. The move to a corporation is cheap relative to what it protects and unlocks, and several of its biggest benefits reward doing it early rather than eventually.
Ready to incorporate — or not sure yet? Contact Barbarian Law to talk through your structure.
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Send what the business does and who the owners are. You get a written estimate before any work begins.
This article is general information about Ontario law, not legal advice, and reading it does not create a lawyer-client relationship. Every situation is different; speak with a lawyer about yours.
