
Tax season in Ontario comes around every year, yet many individuals and business owners still find themselves scrambling at the last minute. Missing a deadline can mean interest charges, penalties, and unnecessary stress. Whether you are filing your personal taxes or managing corporate filings, keeping track of key dates is essential.
Personal Tax Deadlines in Ontario
Most Canadians, including Ontario residents, must file an annual personal income tax return. Here are the key dates to keep in mind:
- April 30 - This is the deadline to file your personal income tax return and pay any balance owing.
- June 15 - If you or your spouse/common-law partner are self-employed, you have until June 15 to file. However, any taxes owing must still be paid by April 30.
- RRSP Contributions - The deadline to contribute to your Registered Retirement Savings Plan (RRSP) for the previous tax year is 60 days after year-end, usually March 1 (or February 29 in a leap year). Contributions made by this date can reduce taxable income for the prior year.
Staying on top of these dates helps avoid late-filing penalties and ensures you take advantage of all available deductions and credits.
Corporate Tax Deadlines in Ontario
Running a corporation comes with additional responsibilities, including corporate income tax filing and installment payments. The main deadlines are:
- Corporate Tax Return (T2) - Must be filed within six months of the corporation's year-end. For example, if your year-end is December 31, your T2 return is due by June 30.
- Corporate Tax Balance Owing - Payment is due within two or three months of year-end, depending on the corporation's circumstances. Most Canadian-controlled private corporations (CCPCs) have three months, while others must pay within two.
- Installment Payments - If your corporation owes more than $3,000 in taxes in a given year, the CRA typically requires quarterly installment payments for the following year.
Because year-ends vary, each business must track its own schedule. Missing these deadlines can lead to costly interest charges.
Why Staying Organized Matters
Ontario tax deadlines are predictable, yet many individuals and businesses still run into trouble because of poor planning. Tracking due dates, setting reminders, and keeping your bookkeeping up to date can make all the difference. When your financial records are organized, tax filing becomes straightforward instead of stressful.
How SHARP & Associates Can Help
At SHARP & Associates, we make sure you never miss a deadline. Our team provides full tax planning and filing services for both individuals and corporations, with a special focus on small businesses and childcare centres across Ontario. We handle the details, so you can focus on running your business with confidence.
Reach out today to learn how SHARP & Associates can keep you on track with every Ontario tax deadline - and help you minimize your tax bill in the process.


