Insight
Nov 24, 2025
Mackisen

CRA Corporate Tax Deductions Audit — Montreal CPA Firm Near You: Ensuring Your Deductions Meet Tax Regulations

A CRA Corporate Tax Deductions Audit reviews the deductions your business has claimed for taxable expenses against your corporate income tax return (T2). Deductions can significantly reduce your taxable income, but if CRA finds that the claimed deductions are incorrect or ineligible, it could result in a reassessment, penalties, or interest charges.
Mackisen CPA Montreal specializes in defending corporate tax deduction claims during CRA audits by ensuring that your deductions are not only eligible but also well-documented. We help businesses avoid penalties and interest charges by ensuring their deductions meet Income Tax Act guidelines.
Legal Foundation
Income Tax Act s.18 — defines the general rules for allowable deductions and outlines which business expenses can be claimed.
Income Tax Act s.20 — sets out the rules for specific deductions, such as capital cost allowances (CCAs), interest expenses, and professional fees.
Jurisprudence: Soper v. Canada (1997 FCA) — clarifies that deductions must reflect the actual cost incurred in generating business income and that personal expenses cannot be claimed as business deductions.
Learning insight: The key to successful tax deduction audits is ensuring that each deduction is substantiated and clearly related to business activities.
Why CRA Conducts Corporate Tax Deductions Audits
CRA typically audits corporate tax deductions to verify that eligible expenses have been properly claimed. Common triggers for deduction audits include:
• large or frequent deductions that seem disproportionate to the reported income
• unsubstantiated claims for capital cost allowances (CCAs) or business expenses
• claims for non-eligible expenses, such as personal expenses, entertainment or travel, that have been incorrectly classified as business expenses
• incorrectly calculated deductions, such as interest expenses or employee benefits
• missing supporting documentation for professional fees, contractor costs, or office supplies
• inconsistent reporting between financial statements and tax returns
• failure to meet deadlines for expense submissions, causing reassessments or penalties for misfiled claims
Learning insight: Clear documentation and timely submissions prevent CRA audits from uncovering ineligible deductions or misclassified expenses.
CRA Corporate Tax Deductions Audit Process
CRA issues an audit notice requesting supporting documents for claimed deductions, such as invoices, contracts, bank statements, and payroll records.
CRA reviews the T2 corporate return and assesses whether deductions are consistent with tax laws.
CRA tests whether deductions for expenses such as capital expenditures, employee benefits, and travel are backed by appropriate receipts and documentation.
CRA verifies whether capital cost allowances (CCAs) are claimed in accordance with tax regulations and eligible asset classification.
CRA assesses whether any interest expenses or loan deductions were applied correctly.
CRA examines whether overhead expenses such as rent, utilities, or professional fees were properly classified and supported by invoices.
Mackisen CPA prepares a detailed defense file, compiling all necessary documentation, justifications, and evidence for the deductions claimed.
Learning insight: Proper expense categorization and clear documentation are essential to defending deductions in an audit.
Mackisen CPA’s Corporate Tax Deductions Defense Strategy
• reconcile income statements and T2 corporate returns to ensure accurate expense reporting
• verify the eligibility of deductions and claims for capital expenditures and business-related expenses
• ensure clear documentation of professional fees, contractor payments, and employee benefits
• apply CCA rules to ensure assets are properly categorized and deductions are calculated correctly
• prepare a CPA-certified audit response to explain any complex deductions, such as foreign tax credits or research tax credits
• submit amended returns or voluntary disclosures if discrepancies are identified in the audit
• negotiate with CRA for penalty relief and interest reduction if deductions are disallowed or reduced
Learning insight: Proper documentation and consistent filings are your best defense during corporate tax audits.
Common CRA Findings in Corporate Tax Deductions Audits
• ineligible personal expenses mistakenly claimed as business expenses
• misclassified capital expenditures, leading to incorrect CCA claims
• unsubstantiated claims for employee benefits, such as healthcare or retirement contributions
• missing or incomplete invoices to support travel deductions or contractor fees
• overstated deductions for office supplies or utilities
• **incorrect application of interest or loan deductions, particularly for corporate loans
• unfiled or incorrect T2 returns, leading to discrepancies in deduction reporting
Learning insight: Misclassified deductions or missing invoices are the most common errors in corporate tax audits. Accurate and timely documentation is crucial.
Real-World Results
• A technology company avoided a $250,000 reassessment when Mackisen CPA helped them organize documentation for research credits and employee deductions.
• A consulting firm saved $100,000 in penalties when we identified that certain capital expenses were incorrectly classified as personal expenses.
• A real estate development firm prevented a $500,000 audit adjustment after we reclassified overhead deductions and provided proper receipts for contractor payments.
Learning insight: Clear and thorough documentation is key to defending tax deductions and avoiding reassessments.
SEO Optimization and Educational Value
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Secondary keywords: business expense classification, tax credit eligibility, corporate tax reporting, CRA tax reassessment, T2 corporate audit defense, business deductions audit
Learning insight: Clear documentation and properly classified deductions can enhance your SEO visibility while ensuring CRA compliance.
Why Mackisen CPA Montreal
With over 35 years of experience in corporate tax audits, deduction defense, and T2 filings, Mackisen CPA Montreal helps businesses navigate CRA audits with ease. Our bilingual CPA team ensures your corporate tax returns are accurate, fully compliant, and defended during CRA reviews. We assist with everything from employee benefits to capital expenditures and research credits.
Learning insight: Timely filings and accurate expense reporting reduce your audit risk and ensure a smooth tax defense process.
Call to Action
If CRA has initiated a corporate tax audit or you need help with defending your deductions, contact Mackisen CPA Montreal for comprehensive tax defense and documentation support.
Phone: 514-276-0808 | Email: info@mackisen.com | Website: mackisen.com
Learning conclusion: A CRA corporate tax deductions audit tests your expense reporting and eligibility for tax credits. Mackisen CPA Montreal helps you prepare and defend your deductions and ensures full compliance with tax laws.

