TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
№ ix Tax

What Cases Does the Tax Court of Canada Hear, and What Is Off-Limits?

Learn which tax disputes belong in the Tax Court of Canada, which go to the Federal Court, and which are not appeals at all, with deadlines explained.

Tax4 min readTSLBy the Treadstone Law Team · CanadaUpdated November 6, 2026
← All articles
Key takeaways
  • The Tax Court hears appeals from assessments after you have served a notice of objection and the Minister has confirmed or reassessed, or 90 days have passed with no decision.
  • A refused request for penalty or interest relief is not a Tax Court appeal; the route is a CRA second review and then Federal Court judicial review within 30 days.
  • Informal and general procedures both exist in the Tax Court, and which one fits depends mostly on the amounts in dispute.

Many people get a notice from the CRA and wonder where a dispute actually goes. Some disagreements belong in the Tax Court of Canada. Others are handled inside the CRA, or in a different court altogether.

This article explains in plain terms what the Tax Court generally decides, what it does not, and how to tell which path your problem is on. It is general information, so confirm your own situation with a lawyer or accountant.

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

The Tax Court hears appeals from assessments

The Tax Court of Canada is where you take a tax assessment you still disagree with after the CRA has looked at it again. It is an appeal court for assessments, not the first place you complain.

After you serve a notice of objection, you may appeal to the Tax Court to have the assessment vacated or varied once the Minister has confirmed the assessment or reassessed. The Minister must reconsider the assessment and then notify you in writing of the outcome.

Because the objection comes first, the Tax Court is generally not available for a problem you have never objected to. A notice of objection must be in writing and set out the reasons and all relevant facts.

Income tax and GST/HST appeals

Income tax assessments are the core of the Court's work under the Income Tax Act. GST/HST objections can also reach the Court, and the CRA treats them in a similar way, with a different waiting period if the CRA never decides.

Whether a particular type of dispute, such as employment insurance or another program, falls within the Court's reach depends on the statute involved and the facts. A lawyer can confirm this before you spend time on the wrong process.

Disputes that are not Tax Court appeals

The judicial review deadline is firm in principle: an application must be made within 30 days after the decision is first communicated, though a Federal Court judge may allow a further period.

Informal or general procedure

Inside the Tax Court there are two tracks. The informal procedure is simpler and applies where the aggregate of all amounts in issue is $25,000 or less, or the loss in issue is $50,000 or less, and you elect it. It also applies where the only subject-matter is interest assessed under the Income Tax Act.

FeatureInformal procedureGeneral procedure
Who can appearYou, counsel or an agentAn individual in person or through counsel
Evidence rulesCourt not bound by technical rules of evidenceFormal documents and discovery steps
Precedent valueJudgment is not a precedentHow earlier judgments apply depends on your case; a lawyer can confirm

If the amounts exceed $25,000 or the loss exceeds $50,000, the Court orders the general procedure, unless you elect to limit the appeal to those amounts.

Appeals beyond the Tax Court and what to do next

A Tax Court judgment can be appealed to the Federal Court of Appeal. The notice must be filed within 30 days, not counting days in July and August, after the judgment. Informal procedure judgments can be appealed only on limited grounds such as lack of jurisdiction, breach of procedural fairness or an error of law.

Frequently asked questions

Can I go straight to the Tax Court without objecting first?

Generally no. The appeal follows a notice of objection and the Minister's confirmation or reassessment. If the Minister has not notified you of a decision, you may appeal once 90 days have passed after service of the notice of objection.

Does the Tax Court review a refused taxpayer relief request?

No. Relief from penalties or interest is an administrative decision, not a Tax Court appeal. If you think the CRA was not fair and reasonable, you can apply to the Federal Court for judicial review within 30 calendar days of receiving the decision.

Can the Tax Court hear a dispute only about interest?

Yes, an appeal where the only subject-matter is interest assessed under the Income Tax Act can use the informal procedure. The Attorney General may apply to move it to the general procedure, and the Court must grant that if the interest in issue exceeds $25,000, though interest accruing after the notice of assessment is excluded from that calculation.

Are Tax Court hearings always public?

Not always. A hearing may be held in camera on a party's application if the circumstances justify it. A lawyer can tell you whether that is realistic in your case.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Canadian laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a tax lawyer or accountant. Reach us at 1-844-900-1070 or send our Team a message.

This is a tax question

A tax planning consult with us is from $563.87, tax included. Third-party fees are extra.

ContactStart a File →