The Tax Court of Canada Appeal Process

The Tax Court of Canada is the federal court that hears appeals from CRA reassessments, redeterminations, and certain other tax decisions. It is an independent court — separate from the CRA — where a judge, not a CRA officer, decides whether a reassessment stands. Getting to the Tax Court generally requires that you first filed a notice of objection and that the CRA confirmed the reassessment (or failed to act on the objection within 90 days). This guide explains how a Tax Court appeal works: the two procedural tracks, the dollar thresholds that separate them, the stages of a case, how evidence works, how settlement happens, and how costs are awarded.

How you get to the Tax Court

An appeal to the Tax Court is the second stage of a tax dispute. The first is the notice of objection — the internal CRA review described in our guide on how to file a notice of objection. You can file a Tax Court appeal after the CRA confirms the reassessment (you then have 90 days from the confirmation), or after 90 days have passed since you filed your objection with no decision from the CRA. The relationship between the two stages, and the choice of when to escalate, is covered in Notice of Objection vs Tax Court Appeal.

Informal Procedure vs General Procedure

The Tax Court has two procedural tracks, and the choice between them shapes the cost, the formality, and the consequences of the appeal.

Informal Procedure

The Informal Procedure is available where, broadly:

• the federal tax and penalties in dispute for a year (excluding interest) are $25,000 or less;
• the loss in dispute is $50,000 or less; or
• the appeal involves only interest, or falls within similar narrowly defined limits.

Under the Informal Procedure, pleadings are simpler, discovery is limited, the rules of evidence are relaxed, and costs awards are modest. Self-representation is common, and a taxpayer may be represented by an agent who is not a lawyer — including an accountant. The trade-off is that Informal Procedure decisions have limited precedential value and a limited right of appeal. If your dispute is over the dollar limits, you can still elect the Informal Procedure by giving up the amount over the threshold.

General Procedure

The General Procedure applies to all other appeals, and to any appeal where the taxpayer chooses it regardless of the amount. It looks much like ordinary civil litigation in the Federal Court: formal pleadings, documentary discovery, oral examinations for discovery, and a trial conducted under the formal rules of evidence. Costs are awarded on a tariff or by direction of the court, and decisions carry full precedential value. Individuals may represent themselves in the General Procedure, but corporations generally must be represented by counsel.

Choosing a track

The choice is strategic, not merely arithmetic. The Informal Procedure is faster and cheaper and suits smaller, document-driven files. The General Procedure is necessary for files over the dollar limits and is often the right choice where a case involves complex legal issues that warrant full discovery, or where the costs and precedent of full procedure are worth pursuing.

The stages of a Tax Court appeal

A General Procedure appeal moves through a recognizable sequence of stages. The Informal Procedure compresses several of them.

1. Notice of appeal

The appeal begins with a notice of appeal, filed within 90 days of the CRA's notice of confirmation (or after the 90-day no-decision threshold). The notice of appeal sets out the facts, the issues, the statutory provisions relied on, and the relief sought. It frames the dispute, and the Crown's response will engage on that framing, so it is drafted with care.

2. Reply

Crown counsel — lawyers from the Department of Justice acting for the Minister of National Revenue — file a reply. The reply sets out the Crown's position, the statutory basis for the reassessment, and, critically, the assumptions of fact the Minister relied on at the reassessment stage. Those assumptions matter enormously, because the taxpayer bears the burden of rebutting them.

3. Answer (optional)

The taxpayer may file an answer to respond to new matters raised in the reply.

4. List of documents and discovery

In the General Procedure, the parties exchange lists of documents and conduct oral examinations for discovery. Discovery is the phase where many cases are effectively won or lost. The taxpayer's own documents drive the case, while the scope of the Crown's discovery is shaped by the assumptions of fact pleaded in the reply.

5. Settlement discussions

Settlement is permitted on a principled basis. This is a defining feature of tax litigation: the Crown may settle on terms that are legally and factually defensible, but it does not, as a rule, settle by simply splitting the difference the way private litigants sometimes do. A settlement has to reflect a result the law could actually support on the facts.

6. Trial

If the case does not settle, it proceeds to trial — live witness testimony, documentary evidence, any expert evidence, and legal argument. Many taxpayer trials are concluded within one to five days, though complex cases run longer.

7. Judgment

The court issues reasons and a formal judgment. The reassessment may be upheld, vacated, or — most commonly when the taxpayer succeeds in part — referred back to the Minister for reconsideration and reassessment in accordance with the court's reasons.

8. Further appeals

Either party may appeal a Tax Court decision to the Federal Court of Appeal, generally within 30 days. A further appeal to the Supreme Court of Canada requires leave, which is granted only in cases of broad significance.

Evidence and the burden of proof

One feature of tax litigation surprises many taxpayers: the burden is largely on you. The Minister's assumptions of fact, set out in the reply, are presumed correct, and the taxpayer's job at trial is to "demolish" those assumptions with evidence. Knowing precisely what the assumptions are — and addressing each one — is fundamental to building the case.

The Tax Court hears the matter de novo. It is not reviewing what the auditor or the Appeals officer decided; it is deciding the dispute afresh on the evidence before it. That has a liberating consequence: documentary gaps that doomed you at audit can sometimes be overcome at trial. The CRA, during audit, may disregard evidence it considers imperfect, but the Tax Court applies the law of evidence. A taxpayer who lacks a particular receipt can still give sworn testimony, call witnesses, and produce corroborating records, and a judge can accept that testimony as direct evidence of what occurred. Where the Crown has no real evidence to contradict credible testimony, an assumption built on suspicion or circumstantial inference may not survive.

This is also why witness preparation matters so much. Most tax trials turn on credibility. A witness who has reviewed the documents, knows the timeline, and can withstand cross-examination strengthens an otherwise good case; a witness who guesses at dates and amounts can undermine one. Preparation here means proper familiarity with the record, not coaching.

Expert evidence

Some appeals call for an expert report — a valuation, an accounting reconstruction, a transfer-pricing analysis. Expert evidence is admitted under the court's rules governing expert witnesses, and a well-prepared expert opinion can be decisive on technical issues a judge would not otherwise be equipped to resolve.

Settlement: most appeals never reach trial

It is worth emphasizing that most Tax Court appeals settle before trial. Settlement can happen at almost any stage — within weeks of filing, during discovery, or on the courthouse steps. The Department of Justice lawyers who act for the Crown are familiar with the law of evidence and assess each file for its litigation risk. Where the Crown's position rests on a weak assumption with little supporting evidence, and where a judge would likely find for the taxpayer, Crown counsel are often open to a reasonable, principled settlement rather than risking a loss and a costs award at trial. This dynamic — a sober, evidence-aware assessment by counsel — is one reason files that stalled at the CRA level can move at the litigation stage.

Costs

Costs are a real consideration, particularly in the General Procedure. The successful party can be awarded costs against the other side, calculated on the Tax Court's tariff or, in appropriate cases, on a more substantial basis at the court's direction. That cuts both ways: a taxpayer who succeeds may recover a portion of their costs, and a taxpayer who loses may be ordered to pay a portion of the Crown's. In the Informal Procedure, costs awards are modest. Factoring potential costs into strategy — including the assessment of whether to accept a settlement offer — is part of running a case responsibly.

What happens if you win, and if you lose

If you win, the court typically refers the reassessment back to the Minister for reconsideration and reassessment in accordance with its reasons. The Minister then issues a corrected reassessment, and you may receive a refund of disputed amounts already paid, together with refund interest. If you lose, the reassessment stands, costs may be awarded against you, and your remaining option is an appeal to the Federal Court of Appeal on a question of law or a palpable error of fact.

How long an appeal takes

Timelines vary with the track and the complexity of the file. Informal Procedure appeals typically run 12 to 18 months from filing to resolution. General Procedure appeals more often take 18 to 36 months, and a complex case with extensive discovery and a multi-day trial can take longer still. Much of that time is not courtroom time — it is the slower work of pleadings, document exchange, discovery, and the back-and-forth of settlement discussions. A taxpayer planning an appeal should budget for a multi-year process and for the carrying cost of any disputed amount that is not held back from collection during that period.

Types of appeals the Tax Court hears

The Tax Court hears a broad range of disputes arising from CRA reassessments. Common categories include:

• Capital gain versus business income — whether a gain on the disposition of property is a capital gain or fully taxable business income.
• Net worth and indirect-verification assessments — reconstructions of income where the CRA has not accepted the reported figures.
• Unreported income allegations — based on third-party data, bank-deposit analysis, or lifestyle audits.
• Gross-negligence penalties under subsection 163(2), which are defensible on their own grounds.
• Shareholder benefit assessments under subsection 15(1) and related provisions.
• Director's liability and section 160 derivative liability assessments.
• GST/HST disputes — denied input tax credits, alleged unreported supplies, new-housing-rebate and real-property questions.
• Treaty-residency and carrying-on-business-in-Canada determinations.
• General anti-avoidance rule (GAAR) and foreign-reporting penalty cases.

Each category carries its own evidentiary and legal demands, which is why there is no single template for a Tax Court appeal. A net worth case is won on reconstructing the household's actual finances; a GAAR case is argued on statutory interpretation and purpose. The case theory has to fit the issue.

Common mistakes in Tax Court appeals

• Filing late. The 90-day appeal deadline is statutory. An extension under section 167 of the Tax Court of Canada Act is possible but the threshold is high.
• Treating the appeal as a re-objection. The court hears the matter de novo. Build the appeal as fresh litigation, not as a complaint about the Appeals officer.
• Failing to challenge the Minister's assumptions. The taxpayer's burden is to demolish the assumptions of fact. Knowing each one and addressing it is fundamental.
• Underprepared witnesses. Witnesses who have not reviewed the documents and who guess at dates and amounts undermine an otherwise strong case.
• Missing the discovery opportunity. Discovery is where the Crown's case is tested. A weak discovery tends to produce a weak trial.
• Ignoring costs. In the General Procedure, a costs award can be material, both as a recovery if you win and as exposure if you lose.

Do you need a lawyer?

In the Informal Procedure, self-representation is common and non-lawyer agents are permitted. In the General Procedure, individuals may self-represent but corporations generally must be represented by counsel, and the formal pleadings, discovery, and rules of evidence make experienced representation valuable. Because a Tax Court appeal is genuine litigation — with a burden of proof on the taxpayer, formal procedure, and costs consequences — the framing decisions made early carry through to trial.

Barrett Tax Law represents taxpayers and corporations through every stage of a Tax Court appeal, from the notice of appeal and pleadings through discovery, settlement, and trial, under both the Informal and General Procedures. You can read more on our Tax Court of Canada page, and on the earlier stage at tax disputes and objections. If collection action is also in play while your appeal proceeds, see our guide to CRA collections.