CRA filing deadlines for Ontario businesses

A working reference for the personal, corporate, HST, payroll, and WSIB dates Ontario businesses file against — with a live countdown to the next one.

HST quarterly
Quarterly HST/GST — quarter ending Jun
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July 31, 2026

Dates and thresholds vary by situation — confirm yours with us or against CRA.

Personal income tax (T1)

Individuals and families.

Personal income tax return (T1)
Individuals
April 30, 2026
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Balance owing payment
Individuals with tax owing
April 30, 2026
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RRSP contribution deadline
Individuals contributing for the prior year
March 1, 2026
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Self-employed

Sole proprietors, contractors, and their spouses.

Self-employed income tax return (T1)
Self-employed people and their spouses
June 15, 2026
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Balance owing payment
Self-employed with tax owing (payment still due Apr 30)
April 30, 2026
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Corporate income tax (T2)

Filing dates are relative to your fiscal year-end.

Corporate income tax return (T2)
All corporations
Six months after fiscal year-end
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Balance owing payment
CCPCs and other corporations
Two months after year-end (three for eligible CCPCs)
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HST/GST

Your frequency (annual, quarterly, or monthly) is assigned by the CRA.

Annual HST/GST return
Annual filers
Three months after fiscal year-end
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Quarterly HST/GST — quarter ending Dec
Quarterly filers
January 31, 2026
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Quarterly HST/GST — quarter ending Mar
Quarterly filers
April 30, 2026
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Quarterly HST/GST — quarter ending Jun
Quarterly filers
July 31, 2026
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Quarterly HST/GST — quarter ending Sep
Quarterly filers
October 31, 2026
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Monthly HST/GST return
Monthly filers
One month after each month-end
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Payroll remittance

Source deductions and year-end slips for employers.

Regular source-deduction remittance
Regular remitters
15th of the month after the payroll
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T4 / T4A slips to employees and CRA
All employers
February 28, 2026
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Accelerated remittances
Threshold 1 & 2 remitters
Schedule depends on remitter type
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Instalments

Required when the prior-year balance exceeds the CRA threshold.

Corporate tax instalment — Q1
Corporations paying by instalment
March 15, 2026
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Corporate tax instalment — Q2
Corporations paying by instalment
June 15, 2026
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Corporate tax instalment — Q3
Corporations paying by instalment
September 15, 2026
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Corporate tax instalment — Q4
Corporations paying by instalment
December 15, 2026
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Personal tax instalments
Individuals required to remit
Mar 15, Jun 15, Sep 15, Dec 15
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WSIB

Workplace Safety and Insurance Board premiums (Ontario).

WSIB premium reporting and payment
Employers with WSIB coverage
Quarterly or annual — schedule assigned by WSIB
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Not sure which apply to you?

Tell us your situation and we'll map the exact dates you file against — and keep you ahead of every one.

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