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Business guide · 2026
Should you incorporate your business in Ontario?
The honest answer for most owners is: it depends on what you do not need to draw. Incorporating is a deferral, not a discount — and a deferral only helps if the money stays in the company. Here is the arithmetic, the cases where it does not pay, and what a corporation actually costs to run each year.
The arithmetic
The saving is on what you leave behind.
A sole proprietor pays personal tax on every dollar the business earns, whether or not it is drawn. A corporation pays corporate tax on its profit, and you pay personal tax only on what you take out as salary or dividends.
In Ontario, active business income inside a Canadian-controlled private corporation is taxed at roughly 11.7% combined for a December 31, 2026 year-end — federal 9% plus an Ontario rate that falls from 3.2% to 2.2% on July 1, 2026, prorated across a year that straddles that date. From 2027 the combined figure is about 11.2%. That rate applies to the first $500,000 of active business income.
So the question is simply how much profit you can leave in the company.
An illustration
Suppose the business clears $50,000 more than you need to live on, and your personal marginal rate is around 43%.
- As a sole proprietor: roughly $21,700 of tax on that $50,000.
- Inside a corporation: roughly $5,900.
- Deferred, for now: about $15,800 — money that stays invested in the business instead of going to the CRA this year.
Two honest caveats. Your marginal rate depends on your total income, so the gap is bigger at the top bracket (Ontario's highest combined personal rate is 53.53%) and smaller in the middle. And it is a deferral: when the money eventually comes out as dividends, more tax is paid. The system is built so that earning through a corporation and paying it out lands in roughly the same place as earning personally. What you gain is the use of the money in the meantime, and control over the timing.
The quick test
Take your net business income. Subtract what your household actually spends, and the tax on that draw. What is left is the only money incorporation helps with.
If the answer is near zero, incorporating this year is a cost, not a saving.
Not only a tax question
Limited liability, continuity, and how clients and lenders see the business all matter, and sometimes they decide it on their own. A lawyer is the right person for the liability question — personal guarantees and director liability cut through the corporate veil more often than owners expect.
When it does not pay
Five situations where waiting is the better call.
| Situation | Why incorporating does not help |
|---|---|
| You draw everything you earn | There is nothing left inside to defer tax on, and you have added a corporate return, bookkeeping and a minute book to your year |
| The business is losing money | Business losses in a sole proprietorship can offset your other personal income in the year. Losses trapped in a corporation cannot — they wait for future corporate profits |
| One client, working like an employee | A corporation with a single payer and employee-like terms can be treated as a personal services business, which is taxed heavily and loses almost all deductions. This is the expensive mistake, not a theoretical one |
| You are about to apply for a mortgage | Lenders usually want two years of personal returns and notices of assessment. Switching your income to dividends, or to a small salary, can shrink what you qualify for at exactly the wrong time |
| The plan is to split income with family | The tax on split income rules limit dividends to family members who are not genuinely active in the business. Do not incorporate on that basis without checking whether the rules actually let you |
None of these are permanent. The usual pattern is a business that incorporates a year or two after the owner first asks, once profit is reliably above what the household draws.
What it costs
The running cost is the part people underestimate.
The government charges for the filing itself are modest and public. In Ontario, articles of incorporation cost $300 online, immediately. Registering a business name for a sole proprietorship is $60. The Ontario annual return costs $0 to file, although it still has to be filed.
The real cost is annual. A corporation needs bookkeeping that stands up, a T2 corporate return with financial statements, payroll if you pay yourself a salary, T4 or T5 slips, the annual return, and a minute book kept current. None of that is optional, and all of it is work the sole proprietorship did not need.
That is why the test above matters. Against a deferral worth a few hundred dollars, the compliance cost wins. Against a deferral worth five figures, it is not close.
Where you incorporate
An Ontario corporation is the usual choice for a business operating here. Federal incorporation and incorporating in another province are both available and sometimes better — a business with operations in several provinces, or one that wants stronger name protection across Canada, has a real decision to make. Professional corporations follow their own College's rules on top.
Other things to know before you decide
HST does not change. The $30,000 threshold applies to the business either way. Incorporating does not reset it.
CPP. A sole proprietor pays both halves on business income. Salary from a corporation is the same; dividends avoid CPP but build no CPP entitlement.
Passive investments. Once a corporation earns more than $50,000 a year in passive investment income, the federal small business limit starts to grind down. Ontario does not apply the same reduction.
Selling later. Shares of a qualifying small business corporation can be eligible for the lifetime capital gains exemption. The tests look back 24 months, so it is a reason to incorporate earlier rather than the week before a sale.
Quick answers
What owners ask us.
At what income should I incorporate?
There is no threshold that fits everyone, because it depends on what you draw rather than what you earn. The practical question is how much profit stays in the business after your household costs and the tax on your draw. When that number is consistently large enough that deferring tax on it outweighs the cost of a corporate return, bookkeeping and the annual filings, incorporating starts to pay.
How much tax does a small corporation pay in Ontario?
About 11.7% combined on active business income for a December 31, 2026 year-end, and about 11.2% from 2027, on the first $500,000. That is federal 9% plus Ontario, whose small business rate falls from 3.2% to 2.2% on July 1, 2026 and is prorated across a year that straddles the date.
Is incorporating a tax saving or a deferral?
Mostly a deferral. Corporate tax is low on income left in the company, but personal tax follows when it comes out as dividends. The system aims to land in the same place either way. The gain is the use of the money in the meantime, control over when you take it, and in some cases access to the capital gains exemption on a sale.
What does it cost to incorporate in Ontario?
The Ontario government charge for articles of incorporation is $300 online. What varies is the professional cost of setting it up properly — the name search where you want a named corporation, the share structure, the minute book — and the annual cost of the corporate return and bookkeeping afterwards. We quote both before you commit.
Can I incorporate and keep doing my own bookkeeping?
Yes, and plenty of owners do. What changes is that the bookkeeping now has to support financial statements and a T2, so the tolerance for a loose year is lower. Most owners who keep doing it themselves still have the year-end prepared professionally.
What is a personal services business, and why does it matter?
It is a corporation that is effectively an employee in corporate clothing — one payer, employee-like control and terms. The CRA taxes it at a much higher rate and disallows most deductions. If you would be incorporating to work for a single client on terms that look like employment, get the arrangement reviewed before you file anything.
Sources: ServiceOntario, costs and time required to register or incorporate ($300 articles of incorporation, $60 business name, $0 annual return); 2026 Ontario Budget for the small business rate change, which is prorated across a year straddling July 1, 2026; CRA, corporation tax rates for the federal small business rate and the $500,000 business limit. The illustration assumes a 43% personal marginal rate and is arithmetic, not a projection for any particular business. See also how we handle incorporations. General information, not advice for your situation.
Want the numbers run on your own business?
Call 647-870-8498 or email info@ghayurtax.com. We will look at what you earn, what you draw and what is left, and tell you plainly whether a corporation is worth it this year — including when the answer is no.