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Appealing a Tax Court Decision to the Federal Court of Appeal in Canada

Lost at the Tax Court of Canada? Learn the 30-day deadline to appeal to the Federal Court of Appeal and the limits on informal procedure appeals.

Tax4 min readTSLBy the Treadstone Law Team · CanadaUpdated November 1, 2026
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Key takeaways
  • The notice of appeal to the Federal Court of Appeal must be filed within 30 days after the Tax Court judgment, not counting days in July and August.
  • Interlocutory judgments have a shorter 10-day limit.
  • Informal procedure judgments can be appealed only on limited grounds, such as lack of jurisdiction, breach of procedural fairness or an error of law.

A loss at the Tax Court of Canada is disappointing, but it is not always the end. A further appeal to the Federal Court of Appeal may be possible, and the deadline is short enough that you need to act quickly.

This article covers the time limit, the grounds that matter, the special limits for informal procedure cases, and the difference between an appeal and other routes such as judicial review. A lawyer can review your judgment and tell you whether an appeal makes sense.

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

The 30-day deadline

A notice of appeal to the Federal Court of Appeal from a Tax Court judgment must be filed within 30 days after the judgment, not counting days in July and August. That July and August rule can stretch the calendar, but you should not rely on counting it yourself without checking.

Interlocutory judgments, meaning rulings made along the way rather than the final decision, have a 10-day limit. If you want to challenge a ruling during the case, the time is even tighter.

Compare this with the first appeal. To reach the Tax Court you had 90 days from the date on the notice of confirmation or reassessment. The window at this stage is much shorter.

What the Federal Court of Appeal looks at

If your case was decided under the informal procedure, the grounds of appeal are limited to those in Federal Courts Act s. 27(1.3). For a general procedure case, which grounds apply and how strong they are depends on your situation, so it is worth confirming with a lawyer. A disagreement with the result alone may not be enough to build an appeal on.

Before deciding, gather the judgment and any reasons, the transcript or notes of the hearing, and the documents that were filed.

Limits on appealing informal procedure decisions

The informal procedure applies to smaller disputes where the amounts in issue are $25,000 or less, or a loss of $50,000 or less, and the taxpayer elects it. It also applies where the only subject-matter is interest.

If your case was decided under the informal procedure, the appeal route is narrower. Those judgments can be appealed to the Federal Court of Appeal only on the limited grounds in Federal Courts Act s. 27(1.3), such as lack of jurisdiction, breach of procedural fairness or an error of law.

Costs, settlement and other routes

Appeals carry cost risk. In the general procedure the Court can order either party to pay some of the other party's legal costs, and a written settlement offer can affect the result. Costs at the Federal Court of Appeal level are a matter to ask your lawyer about.

For a Tax Court appeal that is still pending, the Minister may, with your written consent, reassess at any time to dispose of the appeal. Whether and how a settlement could work after a Tax Court judgment depends on your situation, so it is worth confirming with a lawyer.

SituationRoute
Lost at the Tax Court on an assessmentAppeal to the Federal Court of Appeal within 30 days, not counting July and August
Lost on an informal procedure caseAppeal only on limited grounds
Refused taxpayer relief for penalties or interestFederal Court judicial review within 30 days of receiving the decision, not a Tax Court appeal

The Minister may waive or cancel penalties or interest under ITA s. 220(3.1) up to ten calendar years after the end of the taxation year, but this is an administrative relief decision. If a relief request is refused, the CRA offers a second administrative review, and a taxpayer who thinks the CRA was not fair and reasonable can apply to the Federal Court for judicial review within 30 calendar days of receiving the decision. A Federal Court judge may allow a further period.

What to do next

Frequently asked questions

How long do I have to appeal a Tax Court judgment?

The notice of appeal must be filed within 30 days after the judgment, not counting days in July and August. Interlocutory judgments have a 10-day limit.

Can I appeal an informal procedure decision?

Yes, but only on limited grounds in Federal Courts Act s. 27(1.3), such as lack of jurisdiction, breach of procedural fairness or an error of law. Simply disagreeing with the result is not enough.

What if the Minister appeals my informal procedure win?

If the Minister appeals an informal procedure judgment, your reasonable and proper costs of the appeal are paid by the Crown.

Is a refused penalty relief request appealed to the Tax Court?

No. That is a CRA administrative decision, and a taxpayer who thinks the CRA was not fair and reasonable can apply to the Federal Court for judicial review within 30 calendar days of receiving the decision.

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.

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