TaxFight
TaxFight is live but not open for business yet. The screener runs against the City of Calgary's live assessment data, so everything it tells you about a real address is real. Checkout is not connected (a database, Stripe keys, a Resend key), so nothing can be bought and no card can be charged.

Deadlines for the 2027 cycle

The 2027 dates are not published. Everything below is either the 2026 pattern or is marked as not yet known. Read the deadline off your own notice.

What we know, which is the 2026 cycle

Valuation date2025-07-01
Notices mailed2026-01-14
Customer review period ended2026-03-23
Complaint deadline2026-03-23
Reduced filing fee untilJanuary 31

What that suggests for 2027, and why we will not state it as fact

Notices have mailed in mid January and the deadline has fallen in the second half of March. That is a pattern, not a schedule.

We will not print a 2027 deadline here until the City publishes one, and here is the specific reason. The City's own pages describe the review window inconsistently: one says the period runs 67 days from mailing and another calls it a 60 day period, while the 2026 window actually ran 68 days. Anyone deriving a deadline by counting days from a mailing date is going to be wrong, and being wrong by a day on this particular number costs you the entire year.

The one date that governs

The complaint deadline printed on your own assessment notice. Not this page, not any other website, not what happened last year. Read it off the notice and work backwards from it.

Working backwards from your deadline

  • Before January 31. File and the fee is $40 rather than $50. Filing early also leaves the whole review period to negotiate in.
  • The whole review period. Talk to the assessor. A correction agreed here costs nothing and needs no hearing.
  • The deadline itself. The complaint must be in, with its fee. There is no extension and the customer review period does not pause it.
  • 21 days before any hearing. Your evidence is disclosed, or it cannot be heard.
  • 3 days before. Rebuttal.

The board publishes key dates at https://www.calgaryarb.ca/home.html. The City's review period page is at https://www.calgary.ca/property-owners/assessment/ask-the-assessor.html.

Sources on this page:

  • City of Calgary and Calgary Assessment Review Board, effective 2026-01-14, last checked 2026-09-13. 2027 dates are not published. Expect notices to mail mid January and the deadline to fall in the second half of March. Enter the real deadline per file from the notice.
  • Calgary Assessment Review Board, effective 2026-01-14, last checked 2026-09-13. Caps set by Matters Relating to Assessment Complaints Regulation, Schedule 2, AR 201/2017. Fees apply per roll number. Residential condominiums count as single residential properties.

We link the official pages rather than reproducing them, because they change and a copy here would go stale without anyone noticing.