- Under the Income Tax Act, the CRA can impose this penalty when a taxpayer has made — or has participated in, assented to, or acquiesced in making — a false statement or omission in a…
- The test has two branches, and the CRA only needs to establish one of them: 1.
- As of mid-2026, the gross negligence penalty under the Income Tax Act is 50% of the understated tax or overstated credit attributable to the false statement or omission, subject to a…
Most CRA reassessments simply adjust the tax owing and add interest. A smaller number go further and add a gross negligence penalty — a substantial additional amount the CRA imposes when it concludes a false statement or omission on a return was made knowingly, or under circumstances amounting to gross negligence.
Because this penalty carries real financial weight and a degree of moral judgment about your conduct, it's treated differently than an ordinary reassessment — both in how large it can be and in who has to prove what. This article breaks down the legal test, the numbers involved, and what to do if the CRA proposes one against you.
What the Gross Negligence Penalty Is
Under the Income Tax Act, the CRA can impose this penalty when a taxpayer has made — or has participated in, assented to, or acquiesced in making — a false statement or omission in a return, knowingly or under circumstances amounting to gross negligence. It's a civil penalty, not a criminal charge, but it's designed to punish conduct that goes well beyond an honest mistake.
This distinguishes it sharply from an ordinary reassessment, which can happen even when a taxpayer made a completely innocent error. The gross negligence penalty is reserved for situations where the CRA believes the taxpayer's conduct was deliberate, reckless, or showed a high degree of carelessness about getting it right.
The Legal Test: Knowingly, or With Gross Negligence
The test has two branches, and the CRA only needs to establish one of them:
- Knowingly — the taxpayer actually knew the statement or omission was false when the return was filed.
- Gross negligence — the taxpayer didn't necessarily know, but showed a high degree of negligence, indifference, or recklessness as to whether the law was being complied with.
The second branch is where most disputes happen, because "gross negligence" is a higher bar than ordinary carelessness. An honest bookkeeping error, a defensible but ultimately wrong interpretation of a grey area in the law, or a mistake made after reasonable effort to get things right generally shouldn't meet this standard — even though it might still lead to an ordinary reassessment.
How Much It Can Cost
As of mid-2026, the gross negligence penalty under the Income Tax Act is 50% of the understated tax or overstated credit attributable to the false statement or omission, subject to a minimum penalty of $100. Figures set out in the Income Tax Act don't change often, but always verify the current amount before relying on it, since penalty provisions can be amended.
Because the penalty is calculated as a percentage of the amount involved, it scales with the size of the reassessment — a large unreported amount produces a correspondingly large penalty, on top of the underlying tax and any interest.
Who Has to Prove What
This is one of the most important — and most misunderstood — features of the gross negligence penalty. On an ordinary reassessment, the taxpayer generally bears the burden of showing the CRA's assessment is wrong. For a gross negligence penalty specifically, the burden flips: the Income Tax Act puts the onus on the Minister to justify imposing the penalty, not on the taxpayer to disprove it.
In practice, this means the CRA has to point to evidence supporting either knowledge or gross negligence — it can't simply assert the penalty and expect the taxpayer to prove innocence. This burden-shifting is often central to how these disputes get resolved.
Gross Negligence Penalty vs. an Ordinary Reassessment
| Ordinary reassessment | Gross negligence penalty | |
|---|---|---|
| What triggers it | Any error found in a return, honest or not | A false statement or omission made knowingly or with gross negligence |
| Who bears the burden of proof | Generally the taxpayer | Generally the Minister |
| Financial consequence | Corrected tax owing plus interest | Corrected tax, interest, plus a substantial additional penalty |
| What it implies about conduct | Nothing — errors happen | A finding that conduct went beyond an honest mistake |
If CRA Proposes This Penalty Against You
- Don't ignore the proposal letter. Respond within the timeframe given, even if only to request more time or clarify what's being alleged.
- Gather your records. Contemporaneous documents — invoices, correspondence, notes from when the return was prepared — are often the strongest evidence against a finding of knowledge or gross negligence.
- Assess whether the facts support "gross negligence." A defensible position taken in good faith, even if ultimately wrong, is a different case than a deliberate omission.
- File a Notice of Objection if the penalty is assessed. This is the administrative step that must come before any appeal, and it has its own deadline.
- Consider the Tax Court of Canada if the objection doesn't resolve the dispute — because the Minister carries the burden here, how the case is built and presented matters a great deal.
Frequently asked questions
Is the gross negligence penalty the same as being charged with tax evasion?
No. The gross negligence penalty is a civil penalty imposed administratively by the CRA. Tax evasion is a criminal matter that requires the CRA to refer the case for prosecution and involves a much higher standard of proof. The two are often confused but are legally distinct.
Can I be assessed a gross negligence penalty for a mistake my accountant made?
It depends on the facts. If you knew or were grossly negligent about relying on inaccurate information, or about reviewing what was filed, the penalty can still apply. Simply having someone else prepare your return doesn't automatically shield you if the CRA can show the required knowledge or negligence on your part.
What happens if I object to a gross negligence penalty and lose?
If the objection doesn't resolve in your favour, the next step is an appeal to the Tax Court of Canada. Because the burden of proof sits with the Minister for this specific penalty, how the case is argued at each stage matters significantly.
Does interest still accrue while I'm disputing a gross negligence penalty?
Generally yes — interest continues to accrue on unpaid amounts during a dispute unless you've made arrangements or the CRA has agreed to hold collections. Ask about your specific situation, since collection action during an objection can sometimes be addressed separately.
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