It’s the number one question business owners have for their accountants and tax specialists:
How much tax am I going to pay? And is there anything I can do about it?
The answer is it depends.
And the better question business owners should be asking themselves is:
“Am I paying more tax than I need to because I have not planned ahead?”
If you have these questions and want answers, this article is for you.
This article will help you understand:
- The main factors that affect how much tax business owners pay in Ontario, and
- Tax planning opportunities to help reduce your taxes.
Surprise: Your tax bill is not just based on your income
A common misconception is that your tax bill is based only on how much money you make.
That is only part of the story.
The Canada Revenue Agency explains that income tax rates apply to taxable income, which is your income after applicable deductions, credits and exemptions. Federal tax applies across Canada, and provincial or territorial tax applies in addition to federal tax.
That means two business owners with the same gross revenue can end up with very different tax results.
Why?
Because your tax bill may depend on whether:
- your business is incorporated or unincorporated;
- income is earned personally or inside a corporation;
- if the corporate owner pays themselves a salary, dividends, or a combination of both;
- the business has legitimate deductible expenses;
- RRSP contributions or other deductions are available;
- the owner has other personal income;
- there is a spouse, family trust, holding company, or estate planning structure involved;
- and whether the business has proper bookkeeping and documentation.
As you can see, tax is not just about what you earn. It is also about how you earn it, how it is documented, and how it is planned.
Personal tax vs. corporate tax: what business owners need to understand
For many Ontario business owners, the first big tax question is whether income is earned personally or through a corporation.
If you are a sole proprietor, business income is reported on your personal tax return. You pay personal tax on the net income of the business after allowable expenses.
If your business is incorporated, the corporation is a separate taxpayer. The corporation pays corporate income tax on its taxable income. When money is later paid to you personally, you also have personal tax considerations, depending on whether you take salary, dividends, or another form of compensation.
This is where tax planning becomes important.
An incorporated business may offer flexibility, including the ability to leave some after-tax profits inside the corporation, plan owner compensation, and support longer-term business, retirement, or estate planning goals.
However, incorporation is not automatically better for everyone. It comes with additional compliance costs, filing requirements and planning considerations.
The “right” answer depends on the business owner’s income level, cash flow needs, family situation, growth plans, retirement goals and risk profile. And those are considerations that a good tax specialist can help you navigate.
How much corporate tax do small businesses pay in Ontario?
Current Ontario Corporate Tax Rate Chart
| Ontario corporate tax rates: Federal + Ontario combined | ||||
| Type of corporate income | Applies to | Federal rate | Ontario rate | Combined rate |
| Small business income — before July 1, 2026 | CCPC active business income eligible for the small business deduction, generally up to the first $500,000 | 9.0% | 3.2% | 12.2% |
| Small business income — July 1, 2026 onward | Same as above | 9.0% | 2.2% | 11.2% |
| Small business income — calendar 2026 blended rate | Calendar-year corporations with eligible income across all of 2026 | 9.0% | ~2.7% | ~11.7% |
| General active business income | Income not eligible for the small business rate | 15.0% | 11.5% | 26.5% |
| Manufacturing & processing income | Qualifying Ontario M&P income | 15.0% | 10.0% | 25.0% |
| CCPC investment income | Passive investment income, excluding some dividend situations | 38.67% | 11.5% | 50.17% |
| Personal services business income | Incorporated contractor income caught by PSB rules | 33.0% | 11.5% | 44.5% |
Ontario’s general corporate income tax rate is 11.5%. For eligible Canadian-controlled private corporations, up to $500,000 of active business income may qualify for Ontario’s reduced small business corporate income tax rate. Ontario’s 2026 Budget proposed reducing that provincial small business rate from 3.2% to 2.2%, effective July 1, 2026, with prorating for taxation years that straddle that date.
That sounds simple, but corporate tax planning can become more complex when you factor in:
- federal corporate tax;
- the small business deduction;
- associated corporations;
- taxable capital limits;
- passive investment income;
- shareholder compensation;
- salary and dividends;
- payroll and source deductions;
- HST;
- and long-term succession or estate planning.
This is why the answer to “how much tax do I pay?” is rarely a static number for business owners.
A better question to ask your accountant is:
What is the most tax-efficient way to structure my business income, owner compensation and long-term planning?
That question is much more useful — and usually much more valuable.
Legal ways Ontario business owners may be able to reduce tax
Let’s be clear: reducing tax does not mean hiding income or inflating expenses.
Good tax planning is legal, documented and aligned with your actual business activity.
Here are several legitimate planning areas business owners may want to review.
1. Clean, accurate bookkeeping is an important tax planning advantage
Many business owners think tax planning happens at tax time. In reality, good tax planning starts with good bookkeeping.
If your records are messy, late or incomplete, your advisor may not have enough time or information to identify opportunities before year-end.
Clean books are one of the most important tax planning tools available. Accurate bookkeeping helps ensure that:
- income is properly reported;
- expenses are properly categorized;
- HST is tracked correctly;
- payroll obligations are managed;
- shareholder loans are monitored;
- year-end tax planning is based on real numbers;
- and missed deductions are less likely.
Learn more about Stern Cohen’s bookkeeping solution for your business.
2. Claim legitimate business expenses
Business owners may be able to deduct reasonable expenses incurred to earn business income. The details depend on the nature of the expense, the business and the applicable tax rules.
Common categories may include:
- professional fees;
- office expenses;
- software and subscriptions;
- advertising and marketing;
- vehicle expenses, where applicable;
- meals and entertainment, subject to limits;
- home office expenses, where applicable;
- salaries and subcontractor costs;
- insurance;
- bank charges and interest;
- and training or professional development.
The important word is legitimate.
Expenses should be supportable, reasonable, and connected to earning business income. When in doubt, ask before claiming. Claiming illegitimate expenses could result in penalties equal to 50% of the tax savings plus arrears interest in addition to the tax you tried to save.
3. Review your salary/dividend mix annually
Your best compensation strategy may change from year to year if:
- business profits increased or decreased;
- you need more personal cash flow;
- you want to build RRSP contribution room;
- you are planning to buy a home or refinance;
- you are nearing retirement;
- you have other sources of personal income;
- corporate cash is being retained for growth;
- or tax rates and dividend tax credits change.
This is especially important for incorporated business owners because corporate and personal tax planning are connected. A salary/dividend review with your accountant is not just a tax exercise. It is a cash flow, retirement, compliance and wealth planning exercise!
4. Use RRSP planning strategically
RRSP contributions can reduce taxable income, subject to contribution room and other rules.
For business owners, RRSP planning is closely connected to compensation planning. If you only take dividends, you may not create new RRSP contribution room. If you take salary, you may create RRSP room but also need to consider payroll costs and CPP contributions.
This is one reason salary vs. dividends should be discussed before year-end — not after the fact.
5. Plan before your corporate year-end, not after
Many tax-saving opportunities are time-sensitive.
By the time your year-end financial statements and tax returns are being prepared, some options may no longer be available.
Business owners should ideally review their tax position before year-end to consider questions like:
- Should I pay a bonus?
- Should I declare dividends?
- Should I make RRSP contributions?
- Should I purchase equipment before year-end?
- Are shareholder loans properly managed?
- Is HST up to date?
- Are payroll remittances current?
- Are there unusual transactions that should be reviewed?
- Should we leave more cash in the corporation?
- Are there tax instalments to plan for?
This is where proactive accounting advice can make a major difference.
6. Consider corporate cash flow and retained earnings
One potential benefit of incorporation is that not all after-tax corporate profits must necessarily be withdrawn personally right away.
If you do not need all the money personally, leaving some funds in the corporation may support:
- working capital;
- equipment purchases;
- hiring;
- expansion;
- debt repayment;
- business acquisitions;
- or longer-term investment planning.
However, retaining funds in a corporation should be reviewed carefully by your tax specialist. Passive investment income, shareholder needs, creditor protection, personal tax, retirement planning and estate planning can all affect the best approach.
The goal is not simply to pay the least tax this year.
The goal is to make smart decisions across your full financial picture and plan.
Learn more about Stern Cohen’s rationale for fractional CFO services.
7. Watch shareholder loans
Shareholder loans can create unpleasant tax surprises if they are not managed properly.
Many business owners treat the corporate bank account like an extension of their personal account. This can create problems when personal withdrawals are not properly recorded as salary, dividends, reimbursements or loans.
If shareholder loans are not repaid or cleared properly within the required timelines, there may be tax consequences.
This is another reason clean bookkeeping matters. You do not want to discover a shareholder loan issue after year-end when your options may be limited.
8. Think about estate and succession planning
For successful business owners, tax planning is not only about this year’s return. It’s about understanding how your income flows through your business and personal life — and making smart, legal decisions with the help of your advisors before tax time.
It involves long-term questions like:
- What happens to the business if I retire?
- Will my children take over the company?
- Should I sell the business?
- Is an estate freeze appropriate?
- Do I need a holding company?
- How will tax affect my estate?
- Is my corporate structure still appropriate?
- Do my will and shareholder agreements align?
Estate and succession planning can be especially important for owner-managed businesses where much of the owner’s wealth is tied up in the company.
The earlier these conversations happen with your accounting and tax specialist team, the more options may be available.
Check out Stern Cohen’s estate planning services for business owners.
The Ontario Business Owner Tax Reduction Map
Here is a simple way to think about tax planning by stage of business.
| Business stage | Common tax planning focus |
| Startup | Bookkeeping setup, HST registration, expense tracking, business structure |
| Growing | Payroll, compensation planning, cash flow, corporate tax, financing support |
| Profitable | Salary/dividend mix, RRSP planning, retained earnings, tax instalments |
| Established | Corporate structure, passive income, shareholder planning, succession |
| Transitioning | Estate planning, sale of business, family succession, retirement income |
A new consultant, a growing construction company, a professional services firm, a family business and an owner nearing retirement may all need different tax strategies.
How Stern Cohen Accountants help Ontario business owners
At Stern Cohen, we work with owner-managed businesses across Toronto, the GTA and Ontario.
Our team helps business owners with accounting, tax, bookkeeping, payroll, fractional CFO support, estate planning and advisory services. For our clients, the goal is not just to file tax returns. It’s to build a stronger financial foundation for their business.
That may include:
- cleaner bookkeeping;
- better financial reporting;
- proactive tax planning;
- owner compensation planning;
- cloud accounting systems;
- HST and payroll support;
- corporate year-end planning;
- and long-term estate or succession planning.
When should business owners speak with a tax specialist?
You should consider speaking with a CPA who is a tax specialist at a full-service accounting firm if:
- your business income has increased significantly;
- you have outgrown your current bookkeeper or accounting setup;
- you are behind on HST, payroll or corporate filings;
- you are planning to sell or transition your business;
- you are accumulating cash in your corporation;
- you have multiple corporations or family members involved;
- or you only hear from your accountant at tax time.
The earlier you get advice, the more useful that advice can be. Contact Stern Cohen today.
Key takeaways:
- The answer to “How much tax will I pay?” depends on a number of predictable factors, including how your business is structured, how you pay yourself, how profitable your business is, what deductions and credits apply, whether you have planned ahead, and crucially, whether you got the right advice at the right time from your accountant and tax specialist.
- Tax planning is much easier when there is still a runway to take action.
- Tax planning is not one trick. It is a coordinated system: bookkeeping + compensation + corporate structure + year-end planning + long-term estate/succession planning.
