Free tool · Ontario

Corporate tax due date calculator

Enter your fiscal year end and get your T2 filing date, your balance due date, your HST dates and your slip deadlines, with what actually happens if you miss each one.

Runs in your browser. Nothing reaches us unless you ask us to send you something at the end.

Your fiscal year end

The last day of your corporation's tax year.

Is this a CCPC claiming the small business deduction?

Almost every owner-managed Ontario corporation is. If unsure, leave it as yes.

GST/HST filing frequency

Do you run payroll or issue T4 or T5 slips?

Deadlines for a year end of

What	When	If you miss it

General rules only. Weekend and holiday adjustments, accelerated remitter status, first-year corporations and CRA-specific circumstances can move these dates. Confirm your own before relying on them.

Email me before each date

Estimate only, based on the assumptions listed below this tool. General information, not tax advice for your situation. Confirm your own position, or ask us, before acting on it.

Have someone else track these

The calendar file covers every dated deadline at once and sets a reminder two weeks before each. On a phone, the + Add to calendar link beside each date is usually quicker. The email reminders need nothing imported at all: two weeks before each of your dates, nothing else, and one click stops them.

The two dates people get wrong

The balance is due before the return. A CCPC claiming the small business deduction pays the balance three months after year end, but does not have to file until six months after. Interest starts running at the three-month mark on money you have not calculated yet. That is why a rough estimate in month two is worth doing.

T4 and T5 slips run on the calendar year, not your fiscal year. They are due the last day of February following the calendar year the payments were made, whatever your year end is. Businesses with an off-calendar year end miss this one regularly.

See how we handle corporate tax →

Rather not track these yourself?

Clients on a full-service package do not watch these dates. We file on schedule and tell you what is coming before it arrives.

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