Receiving a Notice of Assessment or Notice of Reassessment that you believe is wrong is a stressful experience. The good news is that Canada's tax system gives every taxpayer a formal legal mechanism to challenge CRA's decisions: the Notice of Objection. This guide walks you through the full CRA objection process in 2025, from understanding when to file to what happens if your case proceeds to Tax Court of Canada.
A CRA objection is a formal legal dispute of a decision made by the Canada Revenue Agency. You have the right to file one when you disagree with a Notice of Assessment (NOA) or Notice of Reassessment (NOR) because:
An objection is not simply a request to revisit your file — it is a statutory right under the Income Tax Act (ITA), and it triggers a formal review process that is separate and independent from the CRA division that originally assessed you. Filing an objection is also a legal prerequisite before you can appeal to Tax Court of Canada, which means skipping this step forfeits your right to judicial review.
Timing is critical. Under the ITA, you must file your Notice of Objection within the later of:
For example, if CRA reassesses your 2023 personal return and the notice is dated March 1, 2025, you have until May 30, 2025 (90 days) to file, or until April 30, 2025 (one year from your 2023 filing deadline) — whichever is later. In this case, May 30 gives you more time.
Missing the deadline is serious. CRA may reject your objection as out of time, and you would lose your right to dispute the assessment through this channel. CRA does have authority to grant a late-filing extension under subsection 166.1 of the ITA, but extensions are not guaranteed and require you to demonstrate that you were unable to act within the deadline or that it is just and equitable to grant the extension. Do not rely on an extension being approved — act as early as possible.
A Notice of Objection can be filed in two ways:
Whichever method you use, your objection must include:
The strength of your objection often determines the outcome. A vague statement that you "disagree with the assessment" is rarely successful. A well-constructed objection should include:
At Swift Accounting Calgary, we prepare objections that are legally grounded and document-rich. The difference between a generic objection and a precise, well-supported one can be the difference between a full reassessment in your favour and years of further dispute.
Once your Notice of Objection is received, CRA assigns it to an Appeals Officer within the Appeals Division — a branch that is independent from the Auditing Division that issued your assessment. This separation is important: the Appeals Officer is not defending the auditor's original decision. They are conducting a fresh review (de novo) of the file.
The Appeals Officer may:
Processing times vary significantly. Straightforward objections involving a single disallowed deduction may resolve within 60 to 90 days. Complex business disputes, transfer pricing matters, or cases with large amounts at issue can take anywhere from 6 to 24 months. CRA's Appeals backlog has grown in recent years, so patience — and proactive follow-up — is important.
After the Appeals Officer completes their review, one of four outcomes is possible:
If CRA confirms the assessment after your objection, you have 90 days from the date of the confirmation to file an appeal with Tax Court of Canada. There are two procedures:
Tax Court is genuinely independent of CRA and has the authority to overturn CRA assessments entirely. While going to court is a significant step, taxpayers do win — particularly when supported by thorough preparation and strong documentation.
Generally, CRA does not enforce collection of the disputed amount during the objection period or while a Tax Court appeal is pending. This is an important protection — it means you typically will not face garnishments or liens on the amount under dispute while your case works through the process.
However, interest continues to accrue on any unpaid tax balance throughout this period. If you ultimately lose your objection, you will owe the original tax plus all accrued interest. For this reason, some taxpayers choose to voluntarily pay the disputed amount to stop interest from running, and then request a refund if the objection is successful. CRA will refund the overpayment with applicable interest if you prevail.
If you are facing a significant balance and are unsure whether to pay now or hold, a tax professional can help you model both scenarios and make an informed decision.
Navigating a CRA objection without professional support is possible, but the stakes are high and the procedural requirements are strict. A missed deadline, a vague submission, or missing documentation can undermine an otherwise valid dispute. The team at Swift Accounting in Calgary has experience preparing and managing CRA objections across a range of issues — from disallowed business expenses and rental losses to unreported income disputes and GST/HST assessments.
If you have received a Notice of Assessment or Reassessment that you believe is incorrect, act quickly. The sooner you engage professional support, the more time you have to build a strong objection.
Contact Swift Accounting today to speak with a Calgary tax professional about your CRA objection — we will assess your situation, explain your options, and help you respond with the strongest possible case.
Processing times depend on the complexity of your case. Simple objections involving a single issue may be resolved in 60 to 90 days. More complex matters — multi-year disputes, business deductions, or cases requiring significant document review — can take 6 to 24 months. CRA's Appeals Division has faced increasing workloads in recent years, so delays beyond CRA's own service standards are common. Staying in contact with your assigned Appeals Officer and responding promptly to any information requests can help avoid unnecessary delays.
Yes, filing your return late does not eliminate your right to object to an assessment. The 90-day objection deadline runs from the date on the Notice of Assessment, regardless of when you filed. However, if you also want to use the "one year from the filing deadline" window, note that this is calculated from your statutory filing deadline (typically April 30), not the date you actually filed. If in doubt about your specific deadline, calculate both dates and use the later one — then confirm with a tax professional.
If CRA issues a Notice of Confirmation upholding the original assessment, you have 90 days from the date of that confirmation to appeal to Tax Court of Canada. For amounts of $25,000 or less in federal tax (or $50,000 or less in losses), the Informal Procedure offers a less formal, lower-cost path where self-representation is practical. For larger amounts, the General Procedure applies and legal representation is strongly recommended. Importantly, the objection stage is a legal prerequisite — you cannot go directly to Tax Court without first having filed and received a response on your objection.
Yes, for the disputed amount only. CRA is generally required to hold collection action on the amount under dispute from the time a valid objection is filed until 90 days after the objection is resolved (or until a Tax Court appeal is decided, if you proceed that far). This means CRA cannot garnish wages or seize accounts for the objected amount during this period. However, interest on unpaid tax continues to accrue throughout. Any undisputed portion of a balance — for example, if only part of the assessment is being challenged — remains subject to normal collection. If you receive collection calls during an active objection, document them and raise the issue with CRA directly or through your tax representative.
Our Calgary team handles personal tax, corporate returns, GST/HST, payroll, and bookkeeping.
Book a Consultation