Tax Guide/CRA notices

Notice of Reassessment

Updated November 4, 2026

A Notice of Reassessment means the CRA changed a return it has already assessed. It could be from a change you requested, or a review.

  • You agree: pay any balance by the date shown.
  • You disagree: contact the CRA or your accountant, and watch the objection deadline.
  • You do not understand: ask for an explanation right away, as the deadline keeps running.

Interest on a new balance can reach back to the original due date.