CRA Audit: What to Expect & How to Respond
Don't Panic
Most CRA "audits" are simple reviews requesting documentation. With good records and honest returns, the process is usually straightforward. Serious audits are rare for most taxpayers.
Types of CRA Reviews
Processing Review
- Most common type
- Request for documentation to support claims
- Usually handled by mail
- Examples: Medical receipts, donation receipts
Matching Program
- CRA compares slips from employers/banks to your return
- Automatically flags discrepancies
- May receive adjustment notice
Desk Audit
- More detailed review by CRA officer
- May request extensive documentation
- Done remotely (by mail/phone)
Field Audit
- In-person examination
- Usually for businesses or complex situations
- Auditor may visit home or business
- Most comprehensive review
What Triggers an Audit?
Red Flags
- Large deductions relative to income
- Significant year-over-year changes
- Cash-heavy businesses
- Home office claims
- Rental losses for multiple years
- High charitable donations
- Missing income slips
Random Selection
Some audits are completely random—not because of anything you did wrong.
Tips and Informants
CRA investigates tips about unreported income or fraud.
When CRA Contacts You
Letter Requests
Most common contact. The letter will specify:
- What documentation is needed
- Deadline to respond (usually 30 days)
- Contact information for questions
Phone Calls
- CRA may call for simple clarifications
- Verify it's really CRA (call them back)
- Never give sensitive info unless verified
Scam Alert: CRA will never demand immediate payment by gift card, cryptocurrency, or threaten arrest. When in doubt, hang up and call CRA directly at their official number.
How to Respond
Step 1: Read Carefully
- Understand exactly what's requested
- Note the deadline
- Don't ignore the letter
Step 2: Gather Documents
- Find receipts for claims in question
- Organize by category
- Make copies (keep originals)
Step 3: Respond Timely
- Meet the deadline
- Request extension if needed (before deadline)
- Send only what's requested
Step 4: Keep Records
- Copy everything you send
- Use registered mail or courier
- Note dates and tracking numbers
Your Rights During an Audit
Taxpayer Bill of Rights
- Right to be treated professionally
- Right to privacy and confidentiality
- Right to a formal review and appeal
- Right to pay only required taxes
- Right to have costs considered
What You Can Do
- Ask for clarification
- Request deadline extensions
- Have a representative
- Appeal decisions
If You Can't Find Documents
Try to Reconstruct
- Bank statements showing payments
- Credit card statements
- Request duplicate receipts from vendors
- Affidavits as last resort
Be Honest
If you don't have proof, explain the situation. CRA may accept partial documentation or reduce (not eliminate) the claim.
Possible Outcomes
No Change
CRA agrees with your return—case closed.
Adjustment
- CRA changes your return
- May owe additional tax + interest
- Receive Notice of Reassessment
Penalties
May apply if:
- Gross negligence in claims
- False statements
- Repeated offenses
When to Get Help
Consider Professional Help If:
- Complex business audit
- Large amounts at stake
- You don't understand the request
- Feel overwhelmed by process
- Potential fraud allegations
Who Can Help
- Accountant (CPA)
- Tax lawyer
- Licensed tax preparer
Preventing Future Audits
- Keep excellent records: 6 years minimum
- Report all income: CRA sees your slips
- Claim only legitimate expenses: With proof
- Be consistent: Sudden changes raise flags
- File on time: Late filers get more scrutiny
Questions About CRA Reviews?
Our AI tax assistant can help answer questions about responding to CRA requests.
Ask the Tax AssistantDisclaimer: This is general guidance. Complex audit situations may require professional assistance.