Canadian business tax guide 2026: What every small business owner must know
Here's your plain-English guide to Canadian small business tax 2026, from rates to deadlines.
Written by Naomi Lai— Small business & finance writer. Read Naomi's full bio
Published Friday 2 October 2026
Table of contents
Key takeaways
- A Canadian-controlled private corporation pays 9% federal tax on the first $500,000 of active business income, thanks to the small business deduction.
- You generally need to register for GST/HST once your taxable revenue passes $30,000 over four consecutive calendar quarters.
- Your main deadlines depend on your structure, but self-employed owners file by 15 June 2027, with any balance owing still due 30 April 2027.
- Incorporated businesses and sole proprietors are taxed differently, so knowing which one you are shapes what you owe and when.
What taxes do Canadian small businesses pay in 2026?
Most Canadian small businesses deal with three main taxes. Getting to know them early makes the rest of the year far calmer.
You might not owe every one of these, but here's the short version of what you're likely to pay:
- Income tax, either corporate tax if you're incorporated or personal tax if you're a sole proprietor
- GST/HST on most goods and services you sell, once you're registered
- Payroll deductions if you employ staff, covering the Canada Pension Plan (CPP), Employment Insurance (EI), and income tax withheld from pay
What is the small business tax rate in Canada for 2026?
If you run a Canadian-controlled private corporation (CCPC), you pay 9% federal tax on the first $500,000 of active business income in 2026. That reduced rate comes from the small business deduction.
Above that $500,000 limit, the general federal corporate rate of 15% applies. Your province or territory charges its own corporate rate on top of that, so the total rate is the two combined.
A few things worth knowing about how the rate works:
- The 9% rate applies only to active business income, not to investment income.
- The $500,000 small business limit is shared across associated corporations.
- Provincial rates vary, so two businesses earning the same amount can owe different totals depending on where they operate.
You can check the current federal and provincial figures on the CRA's corporation tax rates page.
Incorporated vs sole proprietor taxes
How you're taxed comes down to how your business is set up. There are two common paths, and each one changes what you file and how much tax you pay.
The two structures work like this:
- Incorporated: Your corporation is a separate legal entity that pays corporate tax on its profit, and the small business deduction can bring the federal rate down to 9%.
- Sole proprietor or partnership: Your business income is taxed at your personal rate and reported on your own tax return, so there's no separate corporate return.
Say your business earns $80,000 in profit. As a sole proprietor, that $80,000 is added to your personal income and taxed at your personal rates. As a CCPC, the corporation pays corporate tax on that profit first, and you're taxed personally only on what you pay yourself.
Neither path is automatically better. It depends on how much you earn, how much you reinvest, and your longer-term plans.
GST/HST: When to register and what to charge
You generally need to register for GST/HST once your taxable revenue tops $30,000 over four consecutive calendar quarters. Below that, you're considered a small supplier, and registration is optional.
What you charge depends on your province. GST is 5%, while provinces that use the harmonized sales tax charge more: HST is 13% in Ontario, 14% in Nova Scotia, and 15% across the other Atlantic provinces.
Here's how registration usually plays out:
- Track your rolling revenue so you know when you're close to the $30,000 threshold.
- Register with the CRA once you pass it, then charge the right rate on taxable sales.
- Collect the tax, claim input tax credits on eligible purchases, and remit the difference.
You can register voluntarily before you hit $30,000, which lets you claim input tax credits sooner. The CRA explains when you need to register and charge GST/HST in detail.
Payroll taxes: CPP, EI, and source deductions in 2026
If you employ staff, you're responsible for deducting the right amounts from their pay and sending them to the CRA. These are called source deductions.
Source deductions cover three things:
- CPP contributions, based on earnings between the $3,500 basic exemption and the year's maximum pensionable earnings of $74,600 in 2026
- EI premiums for eligible employees
- Income tax withheld from each employee's pay
As the employer, you match your employees' CPP contributions and pay a share of EI premiums too. You then remit the combined amounts to the CRA on a schedule based on your payroll size. The CRA publishes the current CPP contribution rates and maximums each year.
Key CRA tax deadlines for 2027
Missing a deadline can mean interest and penalties, so it helps to mark the ones that apply to you. Your dates depend on whether you're self-employed or incorporated.
Here are the deadlines to plan around in 2027:
- Self-employed owners have until 15 June 2027 to file, but any balance owing is still due 30 April 2027.
- Corporations file their T2 return within six months of their fiscal year-end.
- Corporations pay any balance owing within two months of year-end, though many CCPCs get three months.
- GST/HST annual filers file and pay three months after their fiscal year-end.
Paying by the balance-owing date matters even when you have longer to file, because interest starts adding up on late payments.
What changed for small business tax in 2026
A few numbers shifted for 2026, while the headline rates held steady. Knowing what moved helps you plan without any surprises.
The changes most likely to affect you:
- CPP year's maximum pensionable earnings rose to $74,600, so contributions on higher earnings go up
- Some provinces cut their small business rates, with Ontario lowering its CCPC rate from 3.2% to 2.2% effective 1 July 2026
- The federal 9% small business rate and the $500,000 small business limit stayed the same
Provincial changes like Ontario's affect only businesses in that province, so check your own province's rate alongside the federal figures.
How to get ready for tax time
Good habits through the year make filing far less stressful. A little organization now saves you a scramble later.
Follow these steps to get ready:
- Keep your records, since the CRA asks you to hold onto supporting documents for six years.
- Open a separate business bank account so personal and business money never mix.
- Track your expenses as you go, keeping receipts for anything you plan to claim.
- Set money aside for tax throughout the year so the bill doesn't catch you short.
- Use accounting software to record income and expenses and keep everything in one place.
- Note your filing and payment deadlines early so you're never caught out.
Software can take a lot of the manual work off your plate. It can help you manage your cash flow and stay on top of sending invoices so your records are ready when tax time comes.
Simplify tax time for your Canadian small business with Xero
Tax time gets easier when your income, expenses, and records live in one place. Xero brings your day-to-day finances together so you can see where you stand and file with confidence. You can track spending, reconcile transactions, and pull the reports you need without digging through paper.
FAQs on Canadian small business tax
Here are quick answers to the questions Canadian small business owners ask most about tax in 2026.
What is the small business tax rate in Canada for 2026?
A CCPC pays 9% federal tax on its first $500,000 of active business income, plus a provincial rate that varies by where you operate.
What is the $500,000 small business limit?
It's the amount of active business income a CCPC can earn each year at the reduced 9% federal rate. Income above the limit is taxed at the general 15% federal rate.
Do you need to charge GST/HST?
You generally must register and charge GST/HST once your taxable revenue passes $30,000 over four consecutive calendar quarters. You can also register voluntarily before then.
When are business taxes due in Canada?
Self-employed owners file by 15 June 2027, with any balance owing due 30 April 2027. Corporations file within six months of their year-end and usually pay within two or three months.
How much should you set aside for taxes?
Setting aside a portion of every payment as you earn it keeps you covered. A common approach is to save toward your combined income tax and GST/HST so the bill never comes as a shock.
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