Do I have to register a sole proprietorship?

Not necessarily to operate under your own legal name. But if you use a trade name (anything other than your own name) most provinces require you to register that business name, and you may still need a business number, GST/HST registration, and local licences.

Is a corporation always better than a sole proprietorship?

No. A corporation offers liability protection and tax deferral, but it costs more to set up and maintain and requires a separate T2 return each year. For a brand-new, low-margin, or side business, a sole proprietorship is often the sensible starting point. Get tailored advice.

Can I switch from a sole proprietorship to a corporation later?

Yes. Many businesses start as a sole proprietorship and incorporate once profits and risk grow. There are tax rules (such as a section 85 rollover) that can move assets into a corporation on a tax-deferred basis — get professional advice before you do it.

Am I personally liable in a partnership?

In a general partnership, yes — partners are jointly and severally liable for the partnership’s debts, and one partner can bind the others. A written partnership agreement and, where appropriate, a limited partnership or incorporation can reduce that exposure.

What is a unanimous shareholders’ agreement?

A USA is a contract among a corporation’s shareholders that sets out their rights and obligations — voting thresholds, dispute resolution, and rules for transferring shares. It is wise to negotiate one while everyone is still on good terms, before problems arise.

Which structure is best for taxes?

It depends on whether you have surplus income to defer. A corporation can be tax-efficient for profitable businesses thanks to the small business deduction and tax deferral; a sole proprietorship is simpler when there is little or no surplus. This is exactly the kind of question to put to an accountant.

Sole proprietorship vs. incorporation in Canada: which is right for you?

One of the first real decisions a new Canadian entrepreneur faces is how to structure the business. The choice affects your taxes, your personal liability, your paperwork, and even how you will eventually sell or pass on the business. There is no single right answer for everyone — but understanding the trade-offs makes the decision far easier. This guide draws on themes from tax lawyer Dale Barrett’s "A Quick and Dirty Business Start-Up Guide" and adapts them for today.

What is a sole proprietorship?

As Dale Barrett puts it in his start-up guide, "A Sole Proprietorship is a business owned and run by a person. There are no partners and there are no shareholders." It is the default structure the moment you start doing business under your own name — you can open a business bank account, register for GST/HST, and start invoicing clients almost immediately.

The key thing to understand is that there is no legal separation between you and the business. Even if you register a trade name like "Bob’s Auto Repair," there is no separate legal entity. The business income is your personal income, you report it on your personal T1 return, and there is no separate corporate (T2) return to file.

That simplicity is the appeal: a sole proprietorship is the cheapest and easiest structure to start and maintain. The trade-off is that the business and the owner are one and the same — including for debts and lawsuits.

Fast and inexpensive to start
No separate corporate tax return — income flows onto your personal T1
No legal separation between you and the business
You are personally responsible for all business debts and taxes

What is a partnership, and what is the hidden risk?

If two or more people start operating a business together with the intention of earning a profit, they have formed a partnership — whether or not they ever signed anything. Like a sole proprietorship, a partnership is quick to start, low-cost to maintain, and is not a separate legal entity, so each partner reports their share of the income on their own return.

The risk that catches people off guard is two-fold. First, each partner can generally bind the partnership — meaning one partner can sign contracts, hire, and incur debts that all partners are jointly and severally liable for. Second, without a written partnership agreement, a general partnership between two people can end when one partner dies or leaves, which can leave a deceased partner’s family with no interest to inherit.

A written partnership agreement is therefore essential. A limited partnership is a variation with one general partner who carries the liability and limited partners with limited liability and control — and, unlike a general partnership, it requires formal registration.

What is a corporation, and why do many advisors prefer it?

A corporation is owned by shareholders, who elect a board of directors, who in turn appoint officers (president, treasurer, and so on) to run the company day to day. Unlike the other structures, a corporation is its own separate legal entity in the eyes of the law.

That separation creates a liability shield: generally, shareholders and their personal assets are protected from creditors and lawsuits against the corporation. There are important exceptions — certain "trust" amounts like unremitted GST/HST and payroll source deductions can pierce the shield and attach to directors personally.

For tax, qualifying Canadian-controlled private corporations pay a much lower rate on active business income up to the small business limit, and a corporation lets you keep surplus earnings inside the company and defer personal tax instead of being taxed on money you do not yet need. If you bring on co-owners, a unanimous shareholders’ agreement (USA) is strongly recommended to govern what shareholders can and cannot do and how shares transfer.

Separate legal entity with a liability shield (with exceptions)
Lower tax rate on active business income up to the small business limit
Ability to retain earnings and defer personal tax
More paperwork: annual T2 return, minute book, filings
A unanimous shareholders’ agreement is wise once there is more than one owner

How do the structures compare on tax and liability?

A useful rule of thumb from the book: if you consistently earn more than you need to live on, a corporation may make sense because it lets you defer tax on the surplus. If there is no surplus left at the end of each month, the tax advantage of incorporating may be limited. From a pure liability standpoint, the corporation is generally the strongest structure — though good insurance can mitigate many risks for any business.

Remember that incorporation is not a magic shield against everything. As discussed in our companion article on paying yourself and director’s liability, the taxes a business collects on the government’s behalf are treated very differently from corporate income tax.

This is general information, not legal, tax, or accounting advice. Rules, rates, and thresholds change often and vary by province — verify current requirements with the Canada Revenue Agency, your province, and a qualified professional before you act.

When should you talk to a professional?

Choosing a structure is one of those decisions where an hour with an accountant or tax lawyer often pays for itself. The right answer depends on your income, your risk exposure, whether you have co-owners, and your long-term plans for the business — including how you intend to exit it one day.

It is also worth thinking ahead: the structure you choose affects your eventual exit, the lifetime capital gains exemption, and how the business passes to your family. We cover that in our article on business succession and why owners need a will and power of attorney.

Frequently asked questions

Do I have to register a sole proprietorship?: Not necessarily to operate under your own legal name. But if you use a trade name (anything other than your own name) most provinces require you to register that business name, and you may still need a business number, GST/HST registration, and local licences.
Is a corporation always better than a sole proprietorship?: No. A corporation offers liability protection and tax deferral, but it costs more to set up and maintain and requires a separate T2 return each year. For a brand-new, low-margin, or side business, a sole proprietorship is often the sensible starting point. Get tailored advice.
Can I switch from a sole proprietorship to a corporation later?: Yes. Many businesses start as a sole proprietorship and incorporate once profits and risk grow. There are tax rules (such as a section 85 rollover) that can move assets into a corporation on a tax-deferred basis — get professional advice before you do it.
Am I personally liable in a partnership?: In a general partnership, yes — partners are jointly and severally liable for the partnership’s debts, and one partner can bind the others. A written partnership agreement and, where appropriate, a limited partnership or incorporation can reduce that exposure.
What is a unanimous shareholders’ agreement?: A USA is a contract among a corporation’s shareholders that sets out their rights and obligations — voting thresholds, dispute resolution, and rules for transferring shares. It is wise to negotiate one while everyone is still on good terms, before problems arise.
Which structure is best for taxes?: It depends on whether you have surplus income to defer. A corporation can be tax-efficient for profitable businesses thanks to the small business deduction and tax deferral; a sole proprietorship is simpler when there is little or no surplus. This is exactly the kind of question to put to an accountant.