Can You Appeal to Tax Court of Canada Without a Lawyer?

If the Canada Revenue Agency (CRA) has confirmed an assessment after your objection, the next step is an appeal to the Tax Court of Canada. Many people wonder whether they can manage it on their own or whether a lawyer is essential.

The answer depends largely on which procedure applies to you and how complicated your issues are. This article explains the two procedures, the dollar limits, how costs work and the deadline that matters most.

This article covers Canadian federal tax law, which applies in every province.

When you can appeal to the Tax Court

You must first serve a notice of objection. After that, you may appeal to the Tax Court once the Minister confirms or reassesses, or if 90 days pass with no decision.

The appeal must be filed within 90 days of the notice of confirmation or reassessment. Miss that date and you may lose the right to appeal, so diarize it the day the notice arrives.

If a reassessment follows your objection, you can appeal without serving a new notice of objection.

Informal procedure or general procedure

The Tax Court has an informal procedure and a general procedure. The informal procedure is the lighter route and is the one most often considered by people without a lawyer, but it has limits.

Electing to limit the amount means giving up anything above the limit, so think carefully before doing so. A lawyer or accountant can help you weigh that trade-off.

Doing it yourself or getting help

In your dealings with the CRA, you may choose a person to represent you and to advise you on your tax and benefit affairs, but you remain legally responsible. Whether you act for yourself in the Tax Court or bring in a representative is a practical choice.

• Self-representation may be reasonable where the issue is narrow, the facts are clear and the amount is within the informal limits.
• Help is worth considering where the amount is large, the issue is legal rather than factual, or the general procedure applies.
• Even if you present the appeal yourself, a one-time review of your documents and argument can be useful.

A lawyer can confirm which procedure applies and what is required in your case.

Burden of proof and penalties

Who must prove what depends on the issue. In an appeal involving a penalty under section 163, the burden of establishing the facts that justify the penalty is on the Minister. In an appeal of an assessment made after the normal reassessment period, the burden of establishing misrepresentation lies on the CRA, but once the right to reassess is established, the onus shifts to the taxpayer on the amount.

For most ordinary disputes about income or deductions, you should expect to need documents that back up your numbers. Good records make any appeal easier.

Collection while the appeal is pending

If an appeal is filed, collection of the disputed amount is barred until the Tax Court's decision is mailed or the appeal is discontinued. That restriction does not apply to amounts required to be withheld and remitted, such as payroll source deductions, and related penalties and interest.

Interest still accrues on unpaid tax. For 1 October to 31 December 2026 the prescribed rate on overdue income tax is 7%, and it changes quarterly.

What to do next

• Find the date of the notice of confirmation or reassessment and calculate 90 days from it.
• Add up the amount in issue and any loss in issue, and compare them with the informal procedure limits.
• Decide whether limiting the amount to fit the informal procedure makes sense.
• Organize your records, correspondence and the CRA's reasons for its decision.
• Pay any amounts you do not dispute.
• Get advice from a lawyer or accountant before you file if the stakes are high.

Frequently asked questions