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Tax Due Dates

This is where you’ll find most answers. If you have any further questions, please do not hesitate to contact us.

Important Dates for Corporations

Payments

Filing

Reassessments

Appeals

  • You have 90 days from the date of the notice of assessment or reassessment to file a formal objection.  See resolving disputes for more information.

Refund interest

  • When CRA refunds or applies an overpayment, CRA pays refund interest from certain dates.

Carryback

  • CRA will calculate late payment interest, refund interest, or both, for the carryback from 30 days after certain dates.  See effect of a carryback on interest for more information. 

Registration

Fiscal period

Tax year-end

  • A corporation can use a calendar year for the GST/HST account or use the same fiscal period as the corporation income tax account.