When I do have to file my corporate income tax return?

You have to file your corporate income tax return within six months of the end of each tax year. The tax year of a corporate is its fiscal period.

If your corporation’s tax year ends on the last day of a month, the due date to file the income tax return is the last day of the six month after the end of the tax year. 

Example:

For taxation year ended April 30, the filing deadline is October 31. 
For taxation year ended August 31, the filing deadline is February 28 (or 29). 

If the last day of the tax year is not the last day of a month, file the return by the same day of the sixth month after the end of the tax year. 

Example:

For taxation year ended March 23, the filing deadline is September 23.
For taxation year ended October 2, the filing deadline is April 2.

If the deadline falls on a Saturday, Sunday, or statutory holiday, you will be considered on time if the Canada Revenue Agency (CRA) receives your tax return on the first business day after the filing deadline.

There is penalty charge if filing late.

When do I have to file my personal income tax return?

Additional information