CRA Deadlines Every Ontario Business Owner Must Know in 2026

Mark Your Calendar

Missing a CRA deadline doesn't just mean a late filing — it means penalties, interest charges, and potential loss of benefits. For Ontario business owners, staying on top of deadlines is non-negotiable.

Key 2026 Deadlines

Personal Tax (T1)

Filing deadline: April 30, 2026. Self-employed individuals: June 15, 2026 (but any balance owing is still due April 30).

Corporate Tax (T2)

Due 6 months after your fiscal year-end. Payment is due 2-3 months after year-end depending on your corporation type.

HST/GST Returns

Filing frequency depends on your annual revenue — monthly, quarterly, or annually. Annual filers with a December 31 year-end must file by June 15, 2026.

Payroll Remittances

Due by the 15th of the month following the pay period. Late remittances incur escalating penalties from 3% to 10% depending on how overdue.

How Fusion Financial Keeps You on Track

We maintain a compliance calendar for every client, ensuring no deadline is missed. From HST filings to payroll remittances, we handle submissions directly and keep you informed at every step. Learn more about our CRA compliance services.