The Calgary assessment deadline, and why most people miss it
Short answer. You have 67 days from the date printed on your Calgary assessment notice to question it — that single date governs both the free Customer Review Period and the deadline to file a $50 formal complaint, and once it passes the assessment stands for the year.
One date governs everything
The 67 days run from the date printed on your notice, not from the day it reached you and not from a fixed calendar date. Two homeowners can have different deadlines. Read your own notice.
Within that window you can do both things: talk to an assessor for free, and — if that does not resolve it — file a formal complaint for $50. The window does not extend because you tried the free route first, so start early enough that the second option is still open.
Why almost nobody uses it
about 1 in 200 Calgary homeowners file. The notice arrives in the middle of January, it looks like a bill rather than a decision you can question, and the deadline is far enough away in February or March to be forgotten and then to have passed. There is no extension and no appeal of a missed deadline.
After the window closes
The assessment stands for that tax year. The next opportunity is the following year's notice, on a fresh 67-day clock. If you found a factual error in your property record, it is still worth reporting so the record is right going forward.
Questions
- When is the Calgary property assessment complaint deadline?
- 67 days after the date printed on your assessment notice. Calgary mails residential notices in mid-January, which usually puts the deadline in March, but the governing date is on your notice.
- What happens if I miss the assessment deadline?
- The assessment stands for that tax year. There is no extension. Your next opportunity is the following year's notice.
- Is the Customer Review Period the same as the complaint deadline?
- They run on the same 67-day clock from the date on your notice. The Customer Review Period is the free conversation with a City assessor; the formal complaint to the Assessment Review Board costs $50 and must also be filed inside those 67 days.
Check your own address
The lookup compares your assessed value against genuinely comparable homes in your community — and tells you when the public data cannot settle it.
Last reviewed 2026-09-22. Sources and method: what the complaint records show.