The envelope arrives. Canada Revenue Agency letterhead. Your stomach drops.
Most Canadians receive a CRA audit letter and immediately assume the worst — that they’ve done something seriously wrong, that penalties are coming, or that years of returns are about to be torn apart. In reality, many CRA letters are routine, and the difference between a manageable process and a stressful one often comes down to how you respond in the first few days.
Here’s what you need to know.
Not All CRA Letters Are Audits
The first thing to understand is that the CRA sends many types of correspondence, and they’re not all audit notices. Some are requests for information (called a review), some are adjustments to your assessment, and some are genuine audit notifications. Reading the letter carefully is step one.
Common types of CRA letters include:
- Processing review: The CRA asks you to confirm specific claims on your return — a common deduction like home office expenses or medical credits. This is not an audit.
- Pre-assessment review: Sent before the CRA finalizes your assessment. Usually requests supporting documents.
- Formal audit: The CRA notifies you that your return (or your corporation’s return) is being audited. This triggers a more extensive process.
- Proposal letter: Sent during an audit when the auditor proposes changes to your tax assessment. You have the right to respond before any reassessment is issued.
Each type requires a different response. Treating a simple processing review like a formal audit adds stress and cost. Treating a formal audit like routine mail is dangerous.
Your Response Window Is Real
Every CRA audit letter includes a deadline. Ignore it, and you lose your opportunity to respond before the CRA reassesses your account — potentially in their favour rather than yours.
Typical deadlines are 30 days from the date of the letter, though some requests allow more time. If you need an extension, the CRA will often grant one if you contact them promptly and explain the situation. Getting an extension in writing (or by fax with documentation) is important.
Do not let the deadline pass because you’re overwhelmed or hoping the issue will disappear. It won’t. The CRA will proceed without your input.
What You Should Do Immediately
Within the first 48 hours of receiving a CRA audit letter:
- Read it completely. Note what specifically is being questioned, what documents are requested, and the response deadline.
- Gather your records. Pull the tax return in question plus all supporting documents for the items mentioned. This includes receipts, bank statements, contracts, and any prior CRA correspondence.
- Contact your accountant or CPA. This is not a step to skip. Even if the matter seems minor, professional guidance on how to respond — and what not to say — can make a material difference.
- Do not contact the CRA without preparation. Volunteering information beyond what’s requested is one of the most common and costly mistakes. Answer what’s asked, nothing more.
What the CRA Auditor Is Looking For
In a formal audit, the CRA auditor is reviewing whether your reported income and claimed deductions are accurate and supported by documentation. They’re not there to catch you on technicalities — but they will adjust your assessment if they can’t verify claims.
Common audit triggers include large business expense claims, home office deductions for employees, unreported income, rental property losses, and inconsistencies between reported income and lifestyle or assets.
Understanding what triggered your audit helps you prepare the right response. In my experience, most audits are manageable when the underlying records are organized and the response is handled professionally.
The CRA Review Process
The CRA review process during a formal audit generally follows this sequence:
- Initial audit letter with a request for documents
- Document submission and review by the auditor
- A proposal letter outlining any proposed changes
- Your opportunity to respond with additional information or dispute the proposal
- Notice of Reassessment (if changes are made) or confirmation of the original assessment
At the proposal letter stage, you have a genuine opportunity to push back — with supporting evidence, legal arguments, or simply better documentation. Many proposed reassessments are reduced or eliminated at this stage. If you disagree with a Notice of Reassessment, you can file a Notice of Objection within 90 days.
How to Respond to CRA Requests
When you respond to CRA inquiries, the goal is to provide exactly what was requested, organized and clearly labeled. Sloppy or incomplete responses invite follow-up questions. A well-organized response often resolves the matter quickly.
For written responses: be factual, be concise, and avoid emotional language. Include a cover letter that references the CRA letter, lists the documents provided, and states your position clearly.
For document requests: provide copies, never originals. Keep a complete set of everything you send.
When to Get Professional Help
If the CRA audit letter involves business income, rental properties, corporate returns, or any amount over a few thousand dollars, professional representation is worth the cost. A CPA or tax lawyer communicates with the CRA on your behalf, knows what to provide and what to withhold, and can negotiate on your behalf at the proposal stage.
The team at FShad CPA represents clients through CRA audits and reviews regularly. For a complete breakdown of the audit process, your rights as a taxpayer, and step-by-step guidance on responding effectively, refer to this CRA audit letter guide.
Don’t Panic — But Don’t Delay
A CRA audit letter is not the end of the world. Most are resolved without significant tax changes when handled correctly. The two things that make outcomes worse are panicking and procrastinating. Read the letter, get organized, and get advice. The process is manageable.
This article is general information only and does not constitute legal or tax advice. Consult your CPA or tax professional for guidance specific to your situation.
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AUTHOR BIO:
Faiq Shad, CPA, LPA, is the founder of FShad CPA Professional Corporation, a Woodbridge-based accounting firm specializing in corporate taxation and CRA audit representation. He helps small businesses and incorporated entrepreneurs navigate Canadian tax compliance. Learn more at shadcpa.ca
