CRA Compliance

CRA Audit Support for Canadian Small Businesses

Published 2025-04-10 · Updated 2025-10-22 · By BOMCAS Canada Editorial Team

The difference between a review and an audit

CRA contacts taxpayers in three escalating ways. A pre-assessment or post-assessment review is a routine documentation request — usually for one or two items on a return. A desk audit involves a CRA officer requesting more comprehensive records, usually by mail. A field audit is the most serious form, where a CRA auditor reviews business books at the place of business or virtually. All three require professional handling.

Why CRA audits Canadian small businesses

CRA audits Canadian small businesses for specific reasons: high deduction-to-revenue ratios, sudden swings in reported income, business sectors flagged for non-compliance (construction, restaurants, cash businesses), Voluntary Disclosure Program triggers, third-party tips, GST/HST refund pattern reviews, and statistical anomalies in industry comparisons.

What to do when you receive an audit notice

Do not call CRA back yourself. Do not send documents to CRA without legal/accounting review. Do not extend the audit scope by volunteering information. Do not miss the response deadline. Forward the notice to your accountant immediately, sign a CRA authorization form (RC59) so the accountant can communicate with CRA on your behalf, and let the accountant manage all correspondence and document requests.

The audit defense process

An effective audit defense begins with a thorough internal review of the year(s) under audit before responding to CRA. We identify weak spots, gather supporting documentation, prepare clear written explanations for any unusual items, and submit a comprehensive response package that addresses every CRA question. We also document conversations with CRA in writing to create a clear record.

If the audit results in additional tax assessed

If CRA proposes additional tax, the taxpayer has 90 days from the date of the Notice of Reassessment to file a Notice of Objection (Form T400A). The Notice of Objection sends the file to the CRA Appeals Division, where a different officer reviews the case. If Appeals does not resolve the issue, the taxpayer has 90 days to appeal to the Tax Court of Canada.

Voluntary Disclosure Program (VDP)

If you become aware of past unreported income or filing failures before CRA contacts you, the Voluntary Disclosure Program can provide penalty relief and reduce interest. VDP applications must meet strict criteria — voluntary (before CRA contact), complete, and involve at least one year overdue. We prepare VDP submissions for clients with unreported income, undisclosed foreign assets, late GST/HST registrations, and similar matters.

How this issue connects to broader Canadian tax planning

Like every Canadian tax topic, the answer for any given individual or business depends on facts and timing. The most common reason Canadian taxpayers overpay is not that they file the wrong return — it's that they make structural decisions (incorporation, ownership of real estate, family compensation, retirement drawdown sequencing) without modelling the multi-year consequences. By the time the consequences show up on a tax return, they are usually impossible to reverse cost-effectively.

BOMCAS Canada works with Canadian individuals and businesses on the full spectrum of tax planning and tax compliance. The compliance work — preparing returns, filing GST/HST, running payroll, issuing T4s, responding to CRA — is the visible part of the engagement. The less-visible part is the planning work that happens throughout the year: modelling decisions before they are made, identifying tax opportunities while they are still actionable, and coordinating with legal, banking, and insurance advisors when a tax decision intersects with their domains.

Other Canadian tax topics that may interest you

Canadian tax is interconnected. The salary-vs-dividend decision interacts with RRSP planning, which interacts with CPP entitlement, which interacts with retirement income drawdown, which interacts with OAS clawback. The corporate small business deduction interacts with passive investment income, which interacts with insurance planning. Real estate ownership decisions interact with the Underused Housing Tax, the principal residence exemption, the anti-flipping rules, and provincial property surcharges. Cross-border situations interact with treaty positions, FBAR/FATCA compliance, and departure tax. A good Canadian accountant maps the connections for each client based on their specific facts.

If you would like to discuss how this article applies to your specific situation — whether you're an individual evaluating personal tax planning, a small business owner thinking about incorporation, a real estate investor considering ownership structure, or a professional planning practice transition — call us at 780-667-5250 or submit the contact form. The initial conversation is free, takes 15 to 30 minutes, and there is no obligation. If we are not a fit for your situation, we are happy to suggest other Canadian professionals who might be.

Canadian tax filing deadlines you should know

  • April 30: T1 personal tax return deadline for most Canadians. Balance owing is due by this date even if the filing deadline is extended.
  • June 15: T1 deadline for self-employed individuals and their spouses (any balance owing still due April 30).
  • March 1 or March 2: RRSP, FHSA, and similar registered plan contribution deadline for the prior tax year.
  • January 31: T4, T4A, and T5018 information returns due.
  • February 28: T5 investment income slips due.
  • Six months after corporate year-end: T2 corporate income tax return filing deadline.
  • Two or three months after corporate year-end: T2 balance owing payment deadline.
  • Quarterly (March 15, June 15, September 15, December 15): Personal tax instalment due dates.

How BOMCAS Canada serves clients across Canada

BOMCAS Canada is headquartered in Edmonton, Alberta and serves clients in every Canadian province and territory virtually. Through an encrypted client portal, video meetings, e-signature workflow, and direct CRA representation under written authorization, we deliver the same complete service to a client in a small town in northern Manitoba that we deliver to a downtown Toronto corporation. Most clients find the virtual model both faster and more cost-effective than commuting to a downtown accounting office.

Our fees are fixed by engagement letter — no surprise hourly invoices. Our response standard is one business day for routine client communications. Same accountant year over year — no transferring you to a junior every year. Canadian-only tax focus — we don't do US-only or UK tax in isolation. Industry depth across trucking, real estate, medical professionals, contractors, restaurants, e-commerce, farms, nonprofits, and many other Canadian industries.

Frequently asked questions

How do I work with BOMCAS Canada if I don't live in Edmonton?
Almost identically to how an Edmonton client works with us. We meet by video or phone. Documents go through the encrypted client portal. Engagement letters, CRA authorizations, and tax returns are e-signed. CRA representation works under written authorization regardless of where you live in Canada.
What does an engagement cost?
Depends on the engagement type and complexity. Personal tax engagements are typically a fixed annual fee. Small business engagements are typically a fixed monthly fee. We provide a written fixed-fee quote after a 15–30 minute discovery conversation, signed before any work begins.
Can BOMCAS Canada represent me with CRA?
Yes. With your signed RC59 (business) or AUT-01 (individual), BOMCAS Canada can communicate with CRA on your behalf, respond to review letters, represent you in audits, file Notices of Objection, and coordinate with tax counsel for Tax Court of Canada appeals where required.
What software do you support?
QuickBooks Online, Xero, Sage, Wave, FreshBooks, and several industry-specific platforms (PCLaw, Clio for law; Dext, Hubdoc for receipt capture; Float, Fathom for forecasting). We migrate from one platform to another as part of new client onboarding when needed.

Need help applying this to your situation?

Speak with a Canadian accountant at BOMCAS Canada about your specific tax or accounting situation. We respond within one business day.

Call 780-667-5250 Request Consultation