Judicial Review of CRA Decisions in the Federal Court

Most Canadians who fight the Canada Revenue Agency (CRA) think of the Tax Court of Canada. That court decides whether a tax assessment is correct — whether you owe the amount the CRA says you owe. But a large category of CRA decisions has nothing to do with the arithmetic of an assessment. These are discretionary decisions: choices the law leaves to the judgment of a CRA official. When the Agency exercises that discretion against you, the Tax Court generally has no power to help, because there is no assessment to vary. The remedy lies in a different forum entirely — an application for judicial review in the Federal Court.

This page explains, in general terms, when judicial review is the right tool, what the Federal Court can and cannot do, the standard it applies, and the unforgiving deadline that catches many taxpayers off guard. It is general information about Canadian federal tax law, not legal advice for your situation.

Where the Tax Court ends and the Federal Court begins

The Tax Court of Canada has a defined jurisdiction. It hears appeals from assessments and reassessments of tax, interest, and penalties — questions of whether the law was applied correctly to your facts and figures. If you disagree with how much the CRA says you owe, you file a Notice of Objection and, if that fails, you appeal to the Tax Court. That route is described in our pages on tax disputes and objections and the Tax Court of Canada.

Discretionary decisions are a different animal. Here, Parliament has given a CRA official the power to grant or refuse something — to waive interest, to accept or reject a disclosure, to demand payment from a third party. The question is not what number is correct but whether the official exercised the power lawfully and fairly. The Tax Court has no jurisdiction over that question. Trying to challenge a discretionary refusal by appealing to the Tax Court is a common and costly mistake, because the clock for the correct forum keeps running while the wrong proceeding goes nowhere.

The decisions that belong in Federal Court

Several familiar CRA decisions are discretionary, and challenges to them are heard by way of judicial review:

• Taxpayer-relief denials. The CRA may waive or cancel interest and certain penalties where circumstances such as serious illness, financial hardship, or CRA error contributed to the problem. The decision to grant or refuse that relief is discretionary. If the Agency says no — including after a second-level review — the avenue is judicial review, not the Tax Court. Our page on the taxpayer relief application describes the request itself.
• Voluntary Disclosures Program rejections. When you come forward to correct an inaccurate or incomplete filing, the CRA decides whether your application qualifies for relief from penalties and prosecution. A decision that a disclosure is not valid is a discretionary one. The page on the voluntary disclosure program explains the criteria; a rejection is reviewed by the Federal Court.
• Decisions on a requirement to pay. The CRA can issue a notice requiring a third party — your bank, your employer, a customer — to pay your tax debt directly to the Agency. Disputes about how that collection power has been exercised, where they turn on the lawfulness of the decision rather than the underlying tax, can fall to be reviewed in the Federal Court.
• Other discretionary refusals. The same logic reaches a range of other choices — for example, refusals to extend a deadline at the CRA's discretion, or decisions about how a collection or enforcement power is used.

The common thread is that none of these is an assessment. Each is a decision about your tax affairs that the law commits to the CRA's judgment, and each is therefore reviewed by the Federal Court rather than appealed to the Tax Court.

The legal basis: section 18.1 of the Federal Courts Act

Judicial review of a federal decision-maker is governed by section 18.1 of the Federal Courts Act. It is the provision that lets a person directly affected by a decision of a federal board, commission, or tribunal — and the CRA acts as such when it exercises these statutory discretions — ask the Federal Court to review that decision.

Judicial review is not an appeal. On an appeal, a court can re-decide the merits and substitute its own answer. On judicial review, the court's role is narrower and supervisory. It does not ask whether it would have reached the same conclusion as the CRA. It asks whether the CRA's decision was lawful — whether the official stayed within their authority, followed a fair process, and reached a conclusion that holds together. That distinction shapes everything about how these cases are argued and what they can achieve.

The standard of review: reasonableness

For discretionary CRA decisions, the Federal Court almost always applies the reasonableness standard. Reasonableness review is deferential. The court is not looking for the answer it prefers; it is examining whether the decision the CRA actually made is justified, transparent, and intelligible in light of the facts and the law that constrained the official.

In practice, a reasonable decision is one where the reasoning adds up — where the conclusion follows from the evidence and the governing rules, where the official grappled with the taxpayer's key arguments and evidence rather than ignoring them, and where the result is not internally contradictory. A decision can be set aside as unreasonable if it rests on a fundamental misreading of the record, fails to engage with a central submission, ignores the legal limits on the discretion, or simply does not explain how the official got from the facts to the refusal.

Because the standard is deferential, judicial review is not a second bite at persuading the CRA on the merits. The taxpayer's task is to show that the decision itself does not survive scrutiny — a focused, record-based exercise rather than a fresh argument about why relief should be granted.

The 30-day deadline that catches taxpayers

The single most important practical point about judicial review is the deadline. Under section 18.1 of the Federal Courts Act, an application for judicial review must generally be filed within 30 days after the decision was first communicated to the person affected. That is far shorter than the 90-day window many people associate with objections and Tax Court appeals.

Thirty days runs quickly. By the time a taxpayer absorbs a relief denial or a VDP rejection, gathers their paperwork, and starts looking for help, much of the window may already be gone. The court has a discretion to extend the time in appropriate cases, but an extension is never automatic — it must be requested, and the applicant generally has to offer a reasonable explanation for the delay and show an arguable case. The safe assumption is always that the 30-day limit is firm. If you have received a discretionary decision you want to challenge, the time to act is immediately, not after the deadline has slipped.

What the Federal Court can actually order

It is just as important to understand the limits of the remedy. When the Federal Court agrees that a discretionary CRA decision was unreasonable or unfair, the usual outcome is that the court quashes the decision and sends the matter back to the CRA for redetermination — often before a different official, and frequently with directions about the errors to be avoided the second time around.

The court generally does not substitute its own decision for the CRA's. It will not, in the ordinary case, simply order the Agency to grant the relief, accept the disclosure, or cancel the requirement to pay. Doing so would cross the line from supervising the exercise of discretion into exercising that discretion itself, which is the CRA's role, not the court's. There are narrow situations where only one outcome is reasonably open and a court may decline to send the matter back, but the default and expected result of a successful application is a fresh decision by the CRA, made properly this time.

This is a crucial expectation to set at the outset. Winning a judicial review does not, by itself, deliver the relief you sought — it delivers a lawful reconsideration. That reconsideration may well lead to a different answer, but the decision remains the CRA's to make. Anyone who tells you a court can be counted on to hand you the result directly has misdescribed how judicial review works.

How judicial review fits with your other tax disputes

Discretionary decisions rarely arrive in isolation. A taxpayer fighting a reassessment may also be seeking relief from the interest that has piled up, or may have made a disclosure that the CRA then rejected, or may be facing collection action while an objection is still alive. These tracks run on different rules, different forums, and different deadlines, and a step taken in one can affect the others.

For example, the correctness of an underlying reassessment is for the objection and Tax Court process, while the refusal to waive the interest on that same reassessment is for judicial review. A voluntary disclosure that is rejected may push the matter back toward an audit and a possible objection. Collection pressure during a dispute may engage both negotiation with the CRA and, where a collection decision is challenged, the Federal Court. Keeping these strands coordinated — and protecting every deadline at once — is much of the work in a discretionary-decision case.

How Barrett Tax Law approaches this

At Barrett Tax Law, our tax lawyers begin by identifying the correct forum, because the choice between the Tax Court and the Federal Court determines everything that follows. We review the decision letter and the surrounding correspondence to confirm whether the matter is truly discretionary, to pin down the date the decision was communicated, and to measure exactly how much of the 30-day window remains.

From there, the focus is on the record. Reasonableness review is won or lost on what was before the CRA and on whether the official's reasoning holds together, so we work to assemble the relevant materials, identify where the decision may have ignored evidence or misapplied the limits on its own discretion, and frame the application accordingly under section 18.1 of the Federal Courts Act. Where a judicial review overlaps with an objection, a Tax Court appeal, or ongoing collection, we work to keep those tracks aligned so a deadline in one does not undermine your position in another.

If you have received a taxpayer-relief denial, a Voluntary Disclosures Program rejection, or another discretionary CRA decision you believe was wrong, the time to look at your options is short. You are welcome to reach out for a free, confidential consultation to discuss your situation and understand the paths available to you.