TL;DR
If you've incorporated your business, you need to understand corporate taxes. Here's a plain-language guide to rates, deductions, deadlines, and common mistakes.
You incorporated your business. Good move. But now you've got a separate legal entity that files its own tax return, has its own deadlines, and can cost you real money if you get the basics wrong. I've seen new business owners miss deadlines, mix expenses, and leave thousands in deductions on the table.
Here's what you actually need to know.
The Rates
If your corporation qualifies as a Canadian-Controlled Private Corporation (most small businesses do), you get the small business rate on the first $500,000 of active business income. According to the CRA, that rate ranges from 9% to 12.5% depending on your province. In Ontario, it's about 12.2%. In Alberta, it's 11%.
Income above $500,000, or income from corporations that don't meet the CCPC definition, gets taxed at the general rate. That's 23% to 31% combined federal and provincial. Still lower than personal rates, which can exceed 50%.
The Deadlines That Matter
Your T2 corporate return is due six months after your fiscal year-end. December 31 year-end means June 30 filing deadline. But here's what catches people: the tax balance is due earlier. Two or three months after year-end, depending on your corporation type. File late and you get automatic penalties plus interest.
As Peter Drucker put it, "What gets measured gets managed." Track your deadlines like you track your revenue.
Deductions You Should Be Claiming
One of the biggest advantages of incorporation is deducting business expenses before calculating tax. Common deductions include salaries and wages, rent, utilities, professional fees, software subscriptions, equipment, and business-use vehicle costs. Interest on loans used for business purposes is also deductible.
Don't overlook tax credits. The SR&ED credit for research and development can be significant. The apprenticeship job creation credit is another one. These reduce tax payable or can result in a refund.
I worked with a tech startup that was spending $80K a year on development. They had no idea they qualified for SR&ED credits. We filed retroactively and recovered $34,000. That's money they'd already spent, just sitting there unclaimed.
GST/HST and Payroll
If your business generates more than $30,000 in annual revenue, you must register for GST/HST. Collect it on taxable sales, remit it to the CRA. Filing frequency depends on your revenue.
If you have employees, set up a payroll account. Deduct income tax, CPP, and EI from every paycheck. Remit them on time. T4 slips are due by the end of February each year. Getting payroll wrong is one of the fastest ways to get on the CRA's radar.
What To Do About It
- Know your deadlines. Put your T2 due date and tax payment date in your calendar right now. Set reminders 30 days before.
- Keep personal and business expenses completely separate. Mixed expenses are the number one audit trigger I see.
- Track every deductible expense. Use accounting software like QuickBooks or Wave. If it's a business expense, it should be in the system.
- Ask your accountant about tax credits. SR&ED, apprenticeship credits, and provincial incentives are commonly missed.
- Structure your pay properly. A mix of salary and dividends, planned in advance, can save you thousands. Don't wing it.
The Bottom Line
Corporate taxes aren't complicated once you understand the basics. Know your rates, hit your deadlines, claim your deductions, and keep your records clean. The businesses that do this well keep more of what they earn. The ones that don't end up paying penalties, interest, and their accountant's rush fees. If you need help getting your corporate taxes sorted, book a free call.
Next step: run your numbers through the free CFO scorecard.
Frequently Asked Questions
- What is the corporate tax rate for small businesses in Canada?
- Most Canadian-Controlled Private Corporations pay between 9% and 12.5% on the first $500,000 of active business income, depending on the province. Income above that threshold is taxed at the general corporate rate of 23% to 31%.
- When are corporate taxes due in Canada?
- Corporate tax returns (T2) are due six months after your fiscal year-end. If your year ends December 31, the filing deadline is June 30. However, any tax owing must be paid two to three months after year-end, depending on your corporation type.
- What business expenses can I deduct on my corporate tax return?
- Common deductions include salaries and wages, rent, utilities, professional fees, software, equipment, business vehicle costs, and interest on business loans. The SR&ED credit can also reduce tax for companies doing research and development.
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