CRA objection deadline calculator

Enter the date printed on your notice. The calculator applies the statutory rules and tells you how much time you have left — free, no account needed.

The rules behind this calculator

Income tax — individuals: the later of (a) one year after the tax year's filing-due date, and (b) 90 days after the day of sending of the notice (ITA s.165(1)).
Income tax — corporations and other trusts: 90 days after the day of sending (ITA s.165(1)).
GST/HST: 90 days after the day the notice is sent (ETA s.301(1.1)). GST/HST objections must be filed on the prescribed Form GST159 — not a plain letter.
We use "sending", not "mailing" — that is the statute's word.
If the deadline lands on a weekend or federal holiday, we show the next business day and tell you to file by that date to be safe.

This is an estimate from the dates you entered — not legal or tax advice. Confirm your deadline before filing. If the deadline has passed, the extension rules (ITA s.166.1 / ETA s.303) are shown above.

Within the deadline?

The free quiz checks whether a notice of objection looks like the right track for your situation. The $39 packet then builds your letter, evidence checklist, and filing guide.

Take the free quiz See the $39 packet