One date starts several timelines
A corporation's year-end anchors its annual accounts and T2 reporting period. Payroll and GST/HST may follow different schedules. Keep a separate calendar for each account instead of treating the corporate year-end as the only date that matters.
Confirm the established year-end from the corporation's records. The first period, a proposed change and events such as an amalgamation may need particular attention. Do not assume a different accounting-software setting changes the tax year.
Close the period with evidence
A year-end close needs the balances and transactions around that date. Outstanding customer invoices, unpaid supplier bills, loans, inventory information and equipment changes can all affect the accounts even when the related cash movement happens later.
For example, a supplier invoice received in the following month may relate to goods delivered before year-end. Preserve the dates and supporting documents so the cutoff can be considered properly.
Separate filing from payment
Corporation return filing and tax payment are separate obligations. An extension to prepare the accounts should not be assumed to extend a payment deadline. Use the CRA's current guidance and the company's circumstances to confirm the relevant dates.
Before a busy period, ask your accountant when records are needed, when a preliminary tax estimate will be available and who is responsible for scheduling payments.
Sources & editorial notes
Sources checked October 23, 2026. The examples are illustrative and provide general information. Discuss how the guidance applies to your circumstances with your accountant.
- Determining your corporation's tax yearCanada Revenue Agency
- When to file your corporation income tax returnCanada Revenue Agency
- Corporate income tax payment due datesCanada Revenue Agency
Rules and guidance can change. Use the current official source and confirm the treatment for your facts. To flag an error, contact Sora.