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Top Tax Deadlines for Canadian Small Businesses

Tax season is a significant part of every business owner's year, and for small businesses in Canada, it's essential to be aware of the various tax deadlines to stay compliant and avoid penalties. In this guide, we'll provide a comprehensive overview of the key tax deadlines that small businesses in Canada need to keep in mind.

1. Income Tax Deadlines

The most crucial tax deadline for small businesses is the income tax filing deadline. The specific date can vary depending on your business structure:

  • Sole Proprietorships and Partnerships: If you're a sole proprietor or part of a partnership, your personal tax return, which includes your business income, is due on or before April 30th. However, if you or your spouse or common-law partner is self-employed, you have until June 15th to file, but any taxes owing are still due on April 30th.

  • Corporations: Corporations have six months after their fiscal year-end to file their corporate income tax return. For example, if your fiscal year-end is December 31st, your corporate tax return is due by June 30th.

  • Goods and Services Tax/Harmonized Sales Tax (GST/HST): If your business is registered for GST/HST, you must file a GST/HST return annually or quarterly, depending on your situation. These returns are due within one month of the end of your reporting period.

2. Payroll Tax Deadlines

If you have employees, you'll need to adhere to payroll tax deadlines, which include:

  • Income Tax Deductions: The income tax deducted from employees' paychecks must be remitted to the Canada Revenue Agency (CRA) on or before the 15th of the following month.

  • Employment Insurance (EI) and Canada Pension Plan (CPP) Contributions: Deductions for EI and CPP must also be remitted to the CRA on or before the 15th of the following month.

  • T4 and T4A Reporting: T4 statements for employees and T4A statements for contractors must be provided to recipients by the last day of February following the tax year. The deadline for filing these statements with the CRA is the last day of February.

3. Goods and Services Tax/Harmonized Sales Tax (GST/HST) Deadlines

For businesses registered for GST/HST, it's essential to be aware of the deadlines for filing returns and remitting taxes:

  • GST/HST Return Filing: As mentioned earlier, GST/HST returns must be filed within one month of the end of your reporting period, which could be monthly, quarterly, or annually.

  • GST/HST Remittance: The taxes collected from customers must be remitted to the CRA on or before the due date of your GST/HST return.

4. Corporate Annual Return Filing

Corporations in Canada are typically required to file an annual return with their provincial or territorial corporate registry. The due date for this filing can vary by jurisdiction, so it's essential to check with the appropriate authorities.

5. Seek Professional Guidance

Navigating tax deadlines can be complex, and missing deadlines can result in penalties and interest charges. Small businesses are advised to seek professional guidance from accountants or tax advisors who can help ensure compliance and optimize tax planning.


Understanding and meeting tax deadlines is a fundamental aspect of running a small business in Canada. By keeping track of these important dates, seeking professional advice when needed, and maintaining accurate financial records, you can ensure that your business remains compliant with tax regulations and avoids unnecessary penalties.


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