"Should I incorporate?" might be the most-asked question in Canadian small business, and most answers are either "yes, immediately" from someone selling incorporations or "it depends" with no actual numbers. Let us do better. Here is how each structure is actually taxed in Ontario in 2026, a worked example with real dollars, what it costs, and a checklist you can use today.
How is a sole proprietorship taxed in Ontario?
A sole proprietorship is you. There is no separate legal entity. Every dollar of business profit lands on your personal T1 return in the year you earn it and gets taxed at your personal marginal rates, the same brackets that apply to a salary. Earn more, and each additional dollar is taxed at a higher rate.
The mechanics are simple, which is the structure's biggest selling point:
- You report business income and expenses on your T1 (via form T2125). No separate corporate return.
- Your filing deadline is June 15 as a self-employed person, but any balance owing is still due April 30.
- You can still deduct legitimate business expenses. The write-off rules are largely the same as for corporations.
- Once revenue passes $30,000 you must register for HST, incorporated or not. That happens two ways: gradually, over four consecutive calendar quarters, or all at once inside a single quarter, in which case you lose small supplier status immediately and have 29 days to register.
One cost that surprises people: sole proprietors pay both halves of CPP. An employee pays 5.95% and their employer matches it. When you are self-employed, you are both, so you pay 11.9% on net self-employment income between the $3,500 exemption and the $74,600 ceiling in 2026. At the maximum, that is $8,460.90 per year on top of income tax.
Then there is a second layer most guides stop short of. Since 2024 there is a second CPP contribution, CPP2, on earnings above the first ceiling. In 2026 it applies between $74,600 and $85,000 at 4% per side, so a self-employed person pays the full 8% on that $10,400 band, another $832.00. Add the two together and the real 2026 maximum is $9,292.90, not $8,460.90.
| 2026 CPP for a self-employed owner | Earnings band | Rate (both sides) | Maximum |
|---|---|---|---|
| Base CPP | $3,500 to $74,600 | 11.9% | $8,460.90 |
| CPP2 | $74,600 to $85,000 | 8.0% | $832.00 |
| Total | $3,500 to $85,000 | $9,292.90 |
This matters to the comparison because it is a cost you carry personally as a sole proprietor and a cost your corporation carries for you if you pay yourself a salary. Pay yourself in dividends instead and CPP disappears entirely, along with the pension it buys. That trade-off has its own guide: salary vs. dividends in Canada.
How is a corporation taxed?
A corporation is a separate taxpayer. It earns the profit, files its own T2 corporate return, and pays its own tax. And as of July 1, 2026, that tax got cheaper: Ontario cut its small business rate from 3.2% to 2.2%, so a Canadian-controlled private corporation now pays a combined 11.2% (9% federal plus 2.2% Ontario) on its first $500,000 of active business income.
You probably do not pay 11.2% on your 2026 profit. The cut takes effect partway through the year, and Ontario prorates it by days for any taxation year that straddles July 1, 2026. A corporation with the usual December 31 year end gets 181 days at the old 3.2% and 184 days at the new 2.2%, which blends to about 2.70% Ontario and roughly 11.7% combined for 2026. The clean 11.2% arrives with your first full fiscal year, so January 1, 2027 for a calendar-year corporation. Every guide quoting a flat 11.2% for 2026 is quoting next year's number.
Here is the part the "incorporate and pay 11.2%!" pitch skips: that rate applies to money that stays in the corporation. The moment you pay yourself, a second layer of tax kicks in:
- Salary is deductible to the corporation, but taxed in your hands at personal rates, with CPP on both sides.
- Dividends come out of after-tax corporate profit and are taxed personally at dividend rates designed to roughly account for the corporate tax already paid.
The tax system is built so that a dollar earned and fully paid out to you ends up taxed at roughly the same total rate either way. If you need every dollar the business makes to live on, incorporation is not a tax play. Its power shows up only when money stays behind.
What is the deferral advantage, in real dollars?
This is the whole ballgame, so let us work an example.
Say your business earns $150,000 of profit and you need $80,000 to live on.
As a sole proprietor: all $150,000 is taxed on your personal return this year, at marginal rates that climb well past 40% at that income level, whether you spent the money or not. The $70,000 you did not need still gets taxed as if you did.
As a corporation: you pay yourself an $80,000 salary, which the corporation deducts. That salary is taxed personally, similar to the sole proprietor's first $80,000. But the remaining $70,000 stays in the company and is taxed at just 11.2%, about $7,840, leaving roughly $62,160 working inside the corporation. (Run the same example in a 2026 calendar year, at the blended 11.7% above, and the corporate bill is about $8,190 instead. The point does not change; the arithmetic does.)
Compare the treatment of that same $70,000: if it were taxed personally at a marginal rate above 40%, the bill would top $28,000. Inside the corporation, it is $7,840. That difference, usually $20,000 or more in this scenario, is not permanently saved. You will pay personal tax when you eventually take the money out. But until then, it is capital you can use to hire, buy equipment, build a cash cushion, or invest. That is the deferral advantage, and it compounds every year you leave profit behind.
Flip the example and the advantage vanishes: if you need all $150,000 to live on, everything flows to you and gets taxed personally either way, and you have added corporate filings and accounting fees for roughly nothing.
What about liability protection?
Tax is only half the decision. A corporation is a separate legal person, so business debts and lawsuits generally stop at the corporation instead of reaching your house and savings. That matters more in some businesses than others: contractors, anyone signing leases or supplier contracts, businesses with employees, or work where something going wrong gets expensive.
Two honest caveats. Banks routinely ask small business owners for personal guarantees, which pierce that protection for the debts that matter most. And no corporation shields you from your own professional negligence, which is what insurance is for. Liability protection is real, but it is a reason to incorporate alongside the tax math, rarely instead of it.
How much does it cost to incorporate in Ontario?
Less than most people think up front, more than most people think ongoing:
| Cost | Typical amount (2026) |
|---|---|
| Ontario government fee, DIY online | ~$300 one time |
| Incorporation with professional help (articles, share structure, registrations) | $1,000 – $2,000 one time |
| Ongoing accounting (bookkeeping, financial statements, T2) | $1,500 – $4,000/year and up |
The ongoing line is the one that matters. A corporation must file a T2 every year, even with no activity, and needs proper books and financial statements behind it. If you want to see exactly what that annual job involves before you commit to it, our step-by-step T2 filing guide walks through all ten steps. Realistically, incorporating adds a few thousand dollars a year in professional costs, so the tax deferral needs to beat that before incorporation nets out positive.
Should you incorporate federally or in Ontario?
Once you decide to incorporate, this is the next question, and it is the one the internet gets wrong most often. Start with the part that matters least: the tax math above does not change either way. A federal corporation and an Ontario corporation are both Canadian-controlled private corporations, so both pay the same 11.2% small business rate. Incorporating federally does not lower your tax bill by a dollar. The real differences are cost, name protection, and where you plan to operate.
| Ontario (OBCA) | Federal (CBCA) | |
|---|---|---|
| Government filing fee | $300 online, Ontario Business Registry | $200 online, Corporations Canada |
| Registering to operate in Ontario | Included | No fee. Corporations Canada registers you with Ontario during online incorporation |
| Annual return | Filed through the Ontario Business Registry within 6 months of fiscal year end, no fee | Filed with Corporations Canada every year, $12 online or $40 by mail |
| Name protection | Ontario only | Across Canada |
| Operating in another province | Register extra-provincially there | Register extra-provincially there |
One number to be careful with. Several 2026 incorporation guides claim a federal corporation must pay $330 to register extra-provincially in Ontario, putting the "real" federal cost at $530. That is wrong. Corporations Canada states plainly that there are no fees for registering with the province of Ontario, and it completes that registration for you as part of online federal incorporation. The $330.70 Extra-Provincial Licence applies to corporations formed outside Canada, not to federal Canadian ones. Federal incorporation for an Ontario business is $200, not $530.
The practical read:
- Operating only in Ontario? Either works. Ontario is marginally simpler (one registry, one annual return, no annual fee). Federal costs $100 less up front but adds a $12 annual return to Corporations Canada forever.
- Planning to sell in other provinces? Federal, for the national name protection. You still register in each province where you carry on business, and those provinces do charge: Nova Scotia $274.10, Newfoundland and Labrador $560.
- Worried about your business name? Ontario name protection stops at the provincial border. Federal protection is nationwide, which is the single most common reason to pay for the federal route.
When does incorporating start making sense?
There is no magic revenue number, because the trigger is not revenue. It is profit you can leave in the company. As a rough rule for Ontario in 2026:
- Retaining $30,000+ per year? The deferral outruns the added costs comfortably, and the real crossover sits well below that. The next section works out exactly where it is.
- Spending everything you earn? Stay a sole proprietor for now, unless liability or a specific contract pushes you the other way. Revisit annually.
- Non-tax triggers: clients that only contract with corporations, bringing on a partner or investor, building something you may sell one day, or meaningful liability exposure.
Here is the side-by-side:
| Question | Points to sole proprietorship | Points to incorporation |
|---|---|---|
| Can you leave meaningful profit in the business each year? | No, you spend what you earn | Yes, usually $10,000+ after paying yourself |
| Tax on retained profit | Personal marginal rates on everything | 11.2% on the first $500,000 |
| Liability exposure | Low-risk services | Contracts, employees, physical risk |
| Admin appetite | One T1 return, minimal paperwork | Comfortable with a T2, minute book, and accountant |
| Annual cost tolerance | Keep it near zero | A few thousand in fees is fine if the deferral beats it |
| Future plans | Lifestyle income | Sale, investors, partners, growth |
What is the break-even point for incorporating in Ontario?
Most guides answer this with a revenue number, and revenue is the wrong variable. The crossover is set by how much profit you leave in the company. At a typical $3,000 a year for a T2 return and financial statements, incorporating usually starts paying for itself once you retain roughly $9,000 to $26,000 of profit after paying yourself. The crossover falls as your personal income rises, because every dollar you keep out of your own hands is a dollar you would otherwise have been taxed on at a higher marginal rate.
Here is the first-year arithmetic, assuming you draw $80,000 to live on and leave the rest in the company. The middle columns compare the same retained slice taxed two ways: at 2026 combined federal and Ontario personal marginal rates including the Ontario surtax, or at the 11.2% small business rate.
| Business profit | Left in the company | Personal tax on that slice | Corporate tax at 11.2% | Deferred in year one | After $3,000 of corporate costs |
|---|---|---|---|---|---|
| $80,000 | $0 | $0 | $0 | $0 | Minus $3,000 |
| $100,000 | $20,000 | $6,023 | $2,240 | $3,783 | $783 |
| $120,000 | $40,000 | $13,105 | $4,480 | $8,625 | $5,625 |
| $150,000 | $70,000 | $26,128 | $7,840 | $18,288 | $15,288 |
| $200,000 | $120,000 | $49,224 | $13,440 | $35,784 | $32,784 |
| $250,000 | $170,000 | $73,822 | $19,040 | $54,782 | $51,782 |
At an $80,000 draw the line is crossed at about $96,100 of business profit, which is roughly $16,100 left in the company. Below that, the corporation costs more to run than the deferral is worth. Note how far that sits from the $100,000 to $150,000 range most articles quote, and note that the $100,000 row is barely above water: at $783 of net benefit, incorporating for tax reasons alone at that level is a rounding error, not a strategy.
Where the crossover sits at other income levels
Change the amount you draw and the crossover moves, because the personal rate on the slice you would otherwise take moves with it. Same $3,000 of annual corporate cost throughout:
| You draw | Break-even business profit | Profit you must retain | Your marginal rate on that slice |
|---|---|---|---|
| $40,000 | About $65,900 | About $25,900 | 23.15% to 29.65% |
| $60,000 | About $76,300 | About $16,300 | 29.65% |
| $80,000 | About $96,100 | About $16,100 | 29.65% |
| $100,000 | About $113,700 | About $13,700 | 31.48% to 37.91% |
| $120,000 | About $129,300 | About $9,300 | 43.41% |
| $150,000 | About $158,900 | About $8,900 | 44.97% |
The pattern is the useful part: an owner who already draws a high salary needs to retain very little for the corporation to earn its keep, while an owner drawing $40,000 needs to retain nearly three times as much. Two businesses with identical revenue can land on opposite sides of this line purely because of what their owners spend.
What this calculation does not say
- It is a deferral, not a saving. Every figure above is tax postponed. When you take the money out as dividends you pay personal tax then, and the combined result is roughly what you would have paid as a sole proprietor. The benefit is the use of the cash in the meantime, which is real but is not free money.
- The $3,000 is an assumption, and it moves the answer. Ongoing accounting for a corporation usually runs $1,500 to $4,000. At $2,000 the crossover at an $80,000 draw drops to about $10,800 of retained profit; at $4,000 it rises to about $21,100. Ask what your accountant will actually charge before you decide.
- Salary carries CPP that the table ignores. Paying yourself a salary through a corporation funds both halves of CPP, which the sole proprietor also pays. It is close to a wash between the two structures, so it is left out to keep the comparison clean, but it is not zero.
- 11.2% applies to the first $500,000 of active business income, and to a fiscal year that falls entirely after July 1, 2026. A year straddling that date blends to roughly 11.7%.
- Tax is not the only reason to incorporate. Liability, contracts that require a corporation, partners and investors all sit outside this arithmetic, and any one of them can be the right reason at any income level.
Should you incorporate if you earn under $100,000?
Usually not, for tax reasons alone. Under roughly $100,000 of profit, most owners draw out nearly everything they earn to cover living costs, and money you pay yourself is taxed at your personal rates whether or not a corporation sits in the middle. There is nothing left inside the company to enjoy the 11.2% rate, so the deferral that justifies incorporating never really starts.
Meanwhile the costs are real and immediate: roughly $300 to $2,000 to set up, then $1,500 to $4,000 every year for a T2 return and financial statements. At $80,000 of profit that you fully spend, you are usually paying a few thousand dollars a year for paperwork and getting very little tax back.
The exceptions are not about tax at all. Incorporate under $100,000 if a client will only contract with a corporation, if you are taking on a partner or investor, or if your work carries real liability exposure. Those reasons stand on their own, and they are often the right call at any income level.
What happens if you incorporate while losing money?
This is the scenario most incorporation guides skip, and it is where the two structures differ most. Losses are not treated the same way, and getting it wrong in your early years can cost you a refund you were entitled to.
As a sole proprietor, a business loss lands on your personal T1 and reduces your other income in the same year. If you left a $90,000 job in March and your business lost $20,000 by December, that loss comes off the employment income already on your T4, and you usually get some of the tax withheld on that salary back as a refund. If the loss is bigger than your other income, the leftover becomes a non-capital loss you can carry back 3 years using form T1A or carry forward up to 20 years.
As a corporation, the loss stays in the corporation. A corporation is its own taxpayer, so its non-capital loss can only be applied against the corporation's own taxable income, tracked on T2 Schedule 4 and carried back 3 years or forward 20 years. It does nothing for the tax on your personal salary this year. If the company is losing money and has no past profits to carry the loss back against, the deduction just sits there waiting for income that may take years to arrive.
| If your business loses money | Sole proprietorship | Corporation |
|---|---|---|
| Can the loss reduce your personal income this year? | Yes, on your T1 | No, it stays in the corporation |
| Where the loss is claimed | T1 with form T2125 | T2 Schedule 4 |
| Carry back | 3 years (form T1A) | 3 years |
| Carry forward | 20 years | 20 years |
The practical read: if you expect your first year or two to be lean and you have other income, staying a sole proprietor usually puts cash back in your pocket now. You can incorporate later, once the business is actually profitable and there is something to defer.
What should you do next?
If you are close to the line, the decision deserves an hour with real numbers: your actual profit, your actual living costs, and your plans for the next three years. A good advisor will also flag the details this guide left at a high level, like the right share structure, which is covered in our guide to choosing a small business accountant in Toronto. The other big one, how you actually get money out of the company once it exists, has its own guide: salary vs. dividends in Canada.
Already incorporated or about to be? Get ahead of the filing side with our T2 corporate tax guide. And if you want a straight answer on your own situation, take the free assessment. It takes five minutes and does the math on your numbers, not a hypothetical.
Frequently asked questions
How much does it cost to incorporate in Ontario?
Incorporating in Ontario costs roughly $300 in government fees if you do it yourself online, or $1,000 to $2,000 with professional help for articles, share structure, and initial registrations. Budget another $1,500 to $4,000 per year for ongoing accounting, since a corporation files its own T2 return and needs proper financial statements.
Is it better to incorporate federally or provincially in Ontario?
Neither is better for tax. A federal corporation and an Ontario corporation both pay the same 11.2% small business rate. Ontario incorporation costs $300 online and its annual return is free. Federal incorporation costs $200 online, protects your name across Canada, and adds a $12 annual return to Corporations Canada each year. Registering a federal corporation with Ontario is free, so the widely repeated $530 federal total is wrong. Choose federal if you plan to operate outside Ontario or want national name protection, and Ontario if you will stay provincial and prefer a single registry.
Should I incorporate my small business in Ontario?
Incorporation usually starts making sense when you can leave meaningful profit in the company each year, usually somewhere between $9,000 and $26,000 after paying yourself depending on your personal income, or when liability protection matters for your industry. If you spend everything the business earns, the tax advantage mostly disappears and the extra costs usually outweigh the benefits.
What is the break-even point for incorporating in Ontario?
There is no single revenue number, because the crossover is set by how much profit you leave in the company rather than by what you bill. At a typical $3,000 a year for a T2 return and financial statements, incorporating usually starts paying for itself once you retain roughly $9,000 to $26,000 of profit after paying yourself. At an $80,000 draw the crossover is about $16,100 of retained profit, which is roughly $96,100 of business profit. The number falls as your personal income rises, because each retained dollar is one you would otherwise be taxed on at a higher marginal rate.
How much tax does incorporating actually save in Ontario?
On $150,000 of profit where you draw $80,000 to live on, the $70,000 left in the company is taxed at 11.2%, about $7,840, instead of about $26,128 at 2026 combined federal and Ontario personal marginal rates. That is roughly $18,288 deferred in the first year, or about $15,288 after a typical $3,000 of corporate accounting costs. It is a deferral rather than a permanent saving, because you pay personal tax when you take the money out.
Should I incorporate if my business is losing money?
Usually not. As a sole proprietor, a business loss goes on your personal T1 and reduces your other income in the same year, so if you also have employment income you often get part of the tax withheld on it back as a refund. In a corporation the loss is stuck: it only offsets the corporation's own income, tracked on T2 Schedule 4, carried back 3 years or forward 20 years, and it does nothing for your personal tax bill this year. If you expect early losses and have other income, staying unincorporated usually puts cash back in your pocket sooner.
What is the small business tax rate in Ontario in 2026?
As of July 1, 2026, the combined federal and Ontario small business rate is 11.2% on the first $500,000 of active business income: 9% federal plus 2.2% provincial, after Ontario cut its rate from 3.2%. Fiscal years straddling July 1, 2026 get a blended rate of roughly 11.7%.
Do sole proprietors pay more CPP than incorporated owners?
Sole proprietors pay both halves of CPP, the 5.95% employee share plus the 5.95% employer match, on net self-employment income between $3,500 and the $74,600 ceiling in 2026, which is $8,460.90 at the maximum. On top of that, CPP2 applies at 8% on earnings between $74,600 and $85,000, another $832.00, so the real 2026 maximum is $9,292.90. An incorporated owner paying themselves a salary also funds both halves, but through the corporation, and an owner paid only dividends pays no CPP at all.
Do I pay less tax overall if I incorporate?
Not automatically. Money you pay yourself gets taxed personally either way, so if you spend everything the business earns, incorporation saves little. The real advantage is deferral: profit left in the corporation is taxed at 11.2% instead of your personal marginal rate, leaving more money working inside the company until you take it out.
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