ARG Accountax
Ontario Tax Specialist

Tax Deadline Calendar

Key CRA and Ontario filing deadlines for 2026. Never miss a date.

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Personal Tax (T1) Filing Deadline

April 30, 2025

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Self-Employed T1 Filing Deadline

June 15, 2025

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Corporate Tax (T2) — 6 months after fiscal year-end

6 months after year-end

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HST Annual Return — 3 months after fiscal year-end

3 months after year-end

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Quarterly Tax Instalments

Mar 15, Jun 15, Sep 15, Dec 15

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Full interactive deadline calendar with email reminders coming soon.

Sign up for email reminders 30, 7, and 1 day before each deadline.