Arbitrary Assessment With CRA: How It Works

May 17, 2024
Gurdeep Sangha
arbitrary assessment cra

You have 90 days from the date of the arbitrary assessment notice issued by the Canada Revenue Agency (CRA) to respond or file an objection. It’s crucial to act within this timeframe to dispute the assessment or provide the necessary documentation to correct your tax records.

Table of Contents

What is an Arbitrary Assessment?

An arbitrary assessment, also known as a notional assessment, is a method used by the Canada Revenue Agency (CRA) when a taxpayer fails to file a tax return by the due date, and the CRA has not received sufficient information to accurately assess the taxpayer’s liabilities.

In such cases, the CRA makes an estimate of the taxpayer’s income and the taxes owed based on available information, which may include previous tax returns, information from third parties, or industry standards.

The CRA resorts to arbitrary assessments under several circumstances:

  • Non-Submission of Tax Returns: When a taxpayer does not file a tax return despite reminders and demands from the CRA.
  • Incomplete Information: When the tax return is filed, but it lacks the necessary information for the CRA to make an accurate assessment.
  • Failure to Respond: When the CRA requests additional information from the taxpayer to process a filed return, and the taxpayer fails to respond within the given timeframe.


Arbitrary assessments are used by the CRA as a last resort to enforce tax laws and ensure compliance.

They often result in higher tax liabilities for the taxpayer, as the CRA may overestimate income or not account for all possible deductions and credits.

Additionally, arbitrary assessments can lead to penalties, interest on unpaid taxes from the estimated assessment date, and further enforcement actions, such as liens on property or garnishment of wages.

Taxpayers have the right to dispute an arbitrary assessment by filing the missing returns or providing the requested information to correct the assessment. It’s advisable to address any CRA demands for returns or information promptly to avoid an arbitrary assessment and its potential consequences.

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Understanding CRA Assessments

Understanding CRA Assessments involves grasping what it means when the Canada Revenue Agency (CRA) issues an assessment or reassessment of your tax return.

When the CRA “assesses” your tax return, it means they have reviewed your submission and determined the amount of tax you owe or the refund you are entitled to, based on the information provided and their application of tax laws.

Types of CRA Assessments:

  • Initial Assessment: This is the first assessment you receive after filing your tax return. It indicates that the CRA has processed your return and calculated your tax based on the information you’ve submitted.
  • Reassessment: A reassessment occurs when the CRA needs to adjust your tax return after the initial assessment. This can happen for several reasons, such as if you amend your return, if the CRA conducts a review and finds discrepancies, or if additional information is provided that affects your tax calculation.

What is a CRA 152 7 assessment?

Under subsection 152(7) of the Income Tax Act, the CRA has the authority to perform an arbitrary or notional assessment. This type of assessment is used when a taxpayer fails to file a return by the deadline, and the CRA has insufficient information to accurately assess the taxpayer’s liability.

In such cases, the CRA will estimate the income and taxes owed based on available information, which may include previous tax returns or other sources.

The purpose is to encourage taxpayers to file their returns by imposing an assessment that can be significantly higher than what might actually be owed, prompting the taxpayer to file a return to correct the record.

The Process of a CRA Reassessment

The process of a Canada Revenue Agency (CRA) reassessment begins when the CRA identifies discrepancies or requires further clarification on a previously filed tax return.

This can be triggered by a variety of factors, including random selection for audit, discrepancies between the information reported by the taxpayer and information received from third parties (such as T4 slips from employers), or participation in transactions or tax shelters that the CRA deems to be of interest for closer examination.

Overview of the Reassessment Process

  1. Initial Review: The CRA begins with an initial review of the tax return and compares it against information from third-party sources. If discrepancies are found, the CRA may proceed with a more detailed examination.

  2. Request for Information: The taxpayer may receive a request for additional information or documentation to support claims made on their tax return. This request should be responded to promptly and thoroughly.

  3. Audit: In some cases, an audit may be conducted, which involves a more detailed examination of the taxpayer’s records and financial affairs. This can be done through correspondence or through an in-person visit by a CRA auditor.

  4. Notice of Reassessment: If the CRA determines that changes to the tax return are warranted, a Notice of Reassessment will be issued, outlining the adjustments made and the reasons for them. This notice will also detail any additional taxes owed or refunds due.

  5. Objection and Appeal: If the taxpayer disagrees with the reassessment, they have the right to file a formal objection, which the CRA will review. If the disagreement remains after the CRA’s review, the taxpayer can appeal the decision to the Tax Court of Canada.


The CRA reassessment process is designed to ensure that taxpayers pay the correct amount of tax according to the law. It’s important for taxpayers to keep accurate and comprehensive records of all transactions and to respond promptly to any requests from the CRA.

If a reassessment occurs, understanding the process and knowing your rights can help you navigate it more effectively.

What triggers a CRA reassessment?

Random Audits: The CRA randomly selects tax returns for audit to ensure compliance with tax laws.

Third-party Information: If information from third-party sources (e.g., financial institutions, employers) does not match the data reported on your tax return.

Previous Audit Findings: If past audits have resulted in adjustments, subsequent returns may be scrutinized more closely.

Participation in Tax Shelters or High-risk Transactions: Involvement in activities known for tax evasion risks can trigger a reassessment.

Discrepancies in Deductions or Credits Claimed: Large or unusual deductions or credits that stand out compared to similar returns may be flagged for review.

Disputing a CRA Assessment

Disputing a CRA assessment or reassessment involves a structured process that requires careful attention to detail and adherence to deadlines. Here’s a step-by-step guide on how to effectively dispute a CRA assessment, along with tips for preparing your dispute:

Step 1: Review the Assessment or Reassessment

Understand the Details: Carefully read the Notice of Assessment or Reassessment to understand why the CRA has made certain decisions regarding your taxes.

Identify the Discrepancies: Pinpoint exactly what you believe is incorrect or has been misunderstood by the CRA.

Step 2: Gather Supporting Documentation

Collect Evidence: Assemble all relevant documents that support your position. This could include receipts, invoices, bank statements, contracts, and any other records that substantiate your claim.

Organize Documentation: Ensure your documents are organized in a way that clearly supports your dispute.

Step 3: Contact the CRA

Initial Inquiry: Before formally disputing, consider contacting the CRA to discuss the assessment. Sometimes, misunderstandings can be resolved at this stage without needing to file a formal objection.

Step 4: File a Notice of Objection

Deadline: You have 90 days from the date of the Notice of Assessment or Reassessment to file your objection.

Filing Options: File your Notice of Objection online through the CRA’s My Account, My Business Account, or Represent a Client services. Alternatively, you can mail a completed Form T400A, Objection – Income Tax Act, to the appropriate address provided by the CRA.

Clearly State Your Case: In your objection, clearly explain why you believe the assessment is incorrect. Reference specific line numbers on your tax return and attach supporting documentation.

Step 5: Await the CRA’s Review

Review Process: The CRA will review your objection, which may involve requesting additional information from you. This process can take several months.

Stay Informed: You can check the status of your objection through the CRA’s online services.

Step 6: Understand Possible Outcomes

CRA Decision: After reviewing your objection, the CRA will either adjust your assessment and issue a new Notice of Assessment, or they will confirm their original decision.

Further Appeals: If you disagree with the CRA’s decision on your objection, you can appeal to the Tax Court of Canada within 90 days of receiving the decision.

Can You Fight a CRA Reassessment?

Yes, you can fight a CRA reassessment. Challenging a CRA reassessment involves filing a formal Notice of Objection, where you present evidence and arguments against the reassessment’s findings.

This process requires a detailed understanding of tax laws and the ability to effectively communicate your position. Given the complexities involved, seeking professional advice from a tax expert or accountant like Sansar Solutions is crucial.

Tax professionals can provide strategic guidance, ensure your objection is accurately prepared, and represent you throughout the dispute process, significantly increasing your chances of a favourable outcome.  

How many years can CRA go back?

The Canada Revenue Agency (CRA) has specific limitations on how many years it can go back to reassess tax returns. Generally, the CRA can reassess a tax return within three years from the date of the original Notice of Assessment for most taxpayers.

However, there are exceptions to this rule. If the CRA suspects fraud or misrepresentation, it can go back indefinitely to reassess a tax return.

Additionally, if a taxpayer or a related party has not reported income in a year and that income was required to be reported, the CRA may extend the reassessment period by an additional three years.

Taxpayers have rights under the Canadian tax system, including the right to dispute a reassessment. If you disagree with a reassessment, you can file a Notice of Objection, which must be done within 90 days of receiving the reassessment.

Understanding these limitations and rights is crucial for effectively managing your tax affairs and ensuring compliance with Canadian tax laws.

Common questions about CRA arbitrary assessment

When the CRA says “assessed,” it means they have reviewed and processed your tax return and determined the amount of tax you owe or the refund you are entitled to, based on the information provided. This assessment includes any adjustments the CRA may have made to your return.

A CRA assessment is the initial evaluation of your tax return by the Canada Revenue Agency, determining your tax liability based on the information you’ve submitted. A reassessment occurs when the CRA revisits your tax return after the initial assessment, often due to additional information being considered, which may alter your tax obligation.

Yes, the Canada Revenue Agency (CRA) has the authority to seize assets, including your home, if you owe significant unpaid taxes. However, this action is typically considered a last resort after other collection efforts have failed and proper legal procedures have been followed.

No, a reassessment is not the same as an audit. A reassessment involves the Canada Revenue Agency (CRA) adjusting your tax return based on errors or discrepancies found, often after an initial assessment. An audit, however, is a more thorough review of your financial records and tax filings to ensure compliance with tax laws.

Yes, the Canada Revenue Agency (CRA) has the authority to freeze or seize funds from your bank account if you have unpaid tax debts. This action is typically a last resort after multiple attempts to collect the owed amounts through notices and demands for payment.

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