CRA audit Canada — receiving a letter from the Canada Revenue Agency stating your tax return has been selected for review is one of the most stressful notices a Canadian taxpayer can receive. The good news: with the right professional on your side, most CRA audits are resolved without any additional tax being assessed. Pathak Professional Corporation in Mississauga represents individuals and corporations through every stage of the CRA audit and appeals process.
This comprehensive guide covers everything you need to know about a CRA audit in Canada — why returns get selected, what your rights are, what documents the CRA requests, and exactly what to do from the moment you receive that letter. For an overview of all services we provide, see our accounting firm Mississauga page.
Why Does the CRA Select Returns for Audit?
The CRA uses statistical models, third-party data matching, and random selection to identify returns for audit. Common CRA audit Canada triggers include:
- Large deductions relative to income — home office, vehicle, or entertainment claims that are unusually high for your industry
- Self-employment income — self-employed individuals face significantly higher audit rates than T4 employees; see our guide on self-employed tax Canada
- Rental income losses — claiming rental losses year after year is a known CRA trigger; see rental income tax Canada
- Shareholder benefits and related-party transactions — income splitting, loans to shareholders, and dividends to family members; see shareholder loans Canada tax rules
- Cash-intensive businesses — restaurants, contractors, retail, and other cash-heavy industries
- T-slip matching discrepancies — income on your T1 does not match what payers reported on T4, T5, or T3 slips
- Real estate transactions — property flips, principal residence exemption claims, or HST on new construction; see capital gains tax Canada
- HST/GST Input Tax Credits that appear excessive relative to reported revenue; see GST HST registration Canada
Types of CRA Audits in Canada
Understanding the type of CRA audit Canada you are facing is the first step to responding correctly:
| Audit Type | What It Involves | Typical Duration |
|---|---|---|
| Desk Review | CRA letter requesting documentation for one or two specific line items. No auditor visit. | 2-8 weeks |
| Correspondence Audit | Formal review of specific claims conducted entirely by mail or phone. | 2-4 months |
| Field Audit | CRA auditor visits your business or meets your CPA to review books and records. | 3-18 months |
| Net Worth Audit | CRA suspects unreported income — compares change in net worth to reported income. | 6-24 months |
Your Legal Rights During a CRA Audit
Many Canadians do not realize they have significant legal rights during a CRA audit Canada:
- Receive a written audit letter stating the nature and scope before it begins
- Have an authorized representative (CPA or tax lawyer) communicate with the CRA on your behalf
- Have your representative present at all meetings and interviews
- Challenge any reassessment through the Notice of Objection CRA and Tax Court appeal process
- Apply for taxpayer relief from penalties and interest in cases of extraordinary circumstances
What Documents Does the CRA Request?
During a CRA audit Canada, the auditor typically requests:
- Bank statements for all personal and business accounts for the audit period
- Credit card statements for business expense claims
- Receipts and invoices supporting claimed deductions (vehicle logs, home office calculations)
- Contracts, leases, and agreements
- General ledger, journal entries, and source documents (corporate audits)
- HST/GST returns and working papers
- Corporate minute books and shareholder registers
Critical rule: Produce only documents the CRA specifically requests. Do not volunteer additional information beyond the scope of the audit. This is one of the most important reasons to work with professional representation throughout the process.
The CRA Audit Process — Step by Step
- Initial contact letter — the CRA identifies the tax year(s) and specific issues under review
- Information request — the CRA sends a formal document request; your representative gathers and prepares a professional response package
- Review period — the auditor reviews documents; your representative manages all communication
- Proposal letter — if the CRA intends to reassess, they must send a proposal letter first outlining proposed changes
- Response to proposal — this is your most important opportunity; a well-crafted counter-response frequently eliminates or reduces proposed adjustments before a formal reassessment
- Notice of Reassessment or Confirmation — if you disagree, you have 90 days to file a Notice of Objection
If the CRA Reassesses — What Happens Next
A CRA audit Canada resulting in a reassessment adds arrears interest (compounded daily at ~8-10% annually) and potentially gross negligence penalties (50% of the understatement). If you cannot pay immediately, a CRA payment plan Canada allows installment payments. If the reassessment is wrong, your CPA files a Notice of Objection to formally dispute it. Directors of companies may face personal liability for unremitted HST or payroll — see director liability Canada.
How to Minimize CRA Audit Risk
- File on time every year — late filers attract disproportionate scrutiny; see Canadian tax deadlines 2026
- Maintain immaculate records — retain all receipts, bank statements, and contracts for at least six years
- Claim only what you can document — no receipt, no deduction
- Work with a CPA year-round — proactive tax planning for small business Canada ensures returns are defensible before filing
Frequently Asked Questions — CRA Audit Canada
How long does a CRA audit take?
A desk review can resolve in 4-12 weeks with proper documentation. A small business field audit typically takes 3-9 months. Net worth audits or multi-year complex audits can take 12-24 months or longer.
Can the CRA audit past years I already filed?
Yes — the CRA’s normal reassessment period is three years from the date the original Notice of Assessment was mailed. There is no time limit where the CRA can establish misrepresentation due to neglect, carelessness, or fraud.
What should I do the moment I receive a CRA audit letter?
Call your CPA immediately — before responding to the CRA in any way. Do not send documents without review. Do not ignore the letter. Call Pathak Professional Corporation at 437-872-7399 the same day you receive a CRA audit letter.
Can Pathak CPA represent me during a CRA audit in Mississauga?
Yes — we represent individuals and businesses through correspondence reviews, field audits, net worth audits, HST audits, and SR&ED reviews across Mississauga, Brampton, Oakville, and all of Ontario. Call 437-872-7399 to book your audit representation consultation.
Book Your CRA Audit Consultation — Pathak CPA Mississauga
When the CRA comes calling, Pathak Professional Corporation provides experienced, assertive, and effective audit representation. The earlier we engage, the more options we have. Call 437-872-7399 or visit 48 Village Centre Place, Mississauga, ON L4Z 1V9 the moment you receive a CRA audit letter. See our complete accounting firm Mississauga services for the full range of how we protect and serve our clients.
