What can trigger a review of your tax return by the CRA?

Asked by: Stacey Kuvalis II  |  Last update: August 2, 2026
Score: 4.8/5 (56 votes)

A Canada Revenue Agency (CRA) review is commonly triggered by discrepancies between reported income and third-party slips (T4/T5), large or unusual deductions (medical, child care, employment expenses), or inconsistencies compared to previous years. Other triggers include self-employment, high-risk industries, multiple-year business losses, or random selection.

What triggers a CRA review?

Your income tax and benefit return may be selected for review for a number of reasons, such as: the information on your return does not match the information received from third-party sources, such as T4 slips. the types of deductions or credits you claimed. your compliance history.

Why would your tax return be under review?

The ``under review'' status simply indicates that your return is in process, so there is no cause for concern at this stage. If the IRS identifies any issues, they will contact you in writing to request additional information.

What triggers an IRS refund review?

The IRS uses a combination of automated and human processes to select which tax returns to audit. Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit.

Why did CRA reassess my tax return?

This typically occurs when the CRA finds that an individual or corporation was negligent or untruthful in filing their returns. If you have received a Notice of Reassessment (NORA) there are important deadlines that you must be aware of. A taxpayer has 90 days to file a Notice of Objection with the CRA.

What happens when you get a review letter from the CRA?

20 related questions found

What is the purpose of reassessment?

Why a Reassessment? The objective of a reassessment is to ensure fairness and equity in the collection of revenue for Municipal purposes. Property values change at different rates for various locations and property types.

What is a Canada tax review?

While an audit involves a thorough examination of a taxpayer's history by the Canada Revenue Agency (CRA), potentially spanning multiple years of tax returns, a tax review is a less extensive and more surface-level scrutiny of the information provided in a tax return.

What are common reasons for IRS reviews?

Common IRS audit triggers

  • Making math errors.
  • Failing to report income.
  • Claiming too many charitable donations.
  • Reporting too many losses on a Schedule C.
  • Deducting too many business expenses.
  • Claiming a home office deduction.
  • Using nice, neat, round numbers.

Why is IRS randomly selected for review?

District offices select returns randomly sometimes for special research programs, but generally the returns are selected because they have good audit potential. The potential is discovered by a computerized system called the Discriminant Function System (DIF). In most cases, the decisionmaker is not the auditor.

What does it mean if the IRS is reviewing your tax return?

The IRS reviews some federal tax returns to determine if income, expenses, and credits are reported accurately. The IRS selects returns for review using various methods; including random sampling, computerized screening, and comparison of information received by the IRS such as Forms W-2 and 1099.

Why is my refund taking so long to be reviewed?

A tax refund could be delayed weeks or even months in some cases. The length of the delay may depend on how backed up the IRS is on processing tax returns, whether you turn around requested documentation quickly, and whether you need to file an amended return.

Do all tax returns get reviewed?

The percentage of individual tax returns that are selected for an IRS audit is relatively small. From 2020-2023, less than 0.50% of individual returns were selected for audits — the lowest of any published audit rate since 1950.

What is the difference between audited and reviewed?

An audit provides more assurance (comfort) than a review. Unlike in a review, an auditor must collect evidence to allow them to give a direct reasonable assurance opinion that is positively stated, namely that your charity's financial report meets the requirements of the ACNC Act.

Who is most likely to get audited by CRA?

Individuals who are self-employed are, perhaps, the most audited. The CRA may review income declarations, expenses, deductions etc. In particular, individuals claiming large or unusual deductions have a higher chance of an audit.

What are common reasons for CRA tax return delays?

Errors, missing documents, or incomplete information are common reasons tax returns get delayed. Double-check everything before you submit. The CRA may hold your refund if you have outstanding debts, if your return is selected for manual review, or if you're not up-to-date on previous tax filings.

What looks suspicious to the IRS?

If the deductions, losses, or credits on your return are disproportionately large compared with your income, the IRS may want to take a second look at your return. Taking a big loss from the sale of rental property or other investments can also spike the IRS's curiosity.

What are 5 red flag symptoms?

Here's a list of seven symptoms that call for attention.

  • Unexplained weight loss. Losing weight without trying may be a sign of a health problem. ...
  • Persistent or high fever. ...
  • Shortness of breath. ...
  • Unexplained changes in bowel habits. ...
  • Confusion or personality changes. ...
  • Feeling full after eating very little. ...
  • Flashes of light.

Does IRS manually review returns?

Employees will review and either manually release the refund or confirm the error. If an error is confirmed, a notice will be sent to the taxpayer either requesting additional information or informing the taxpayer the error has been corrected through the IRS's math error authority.

What is most likely to trigger an IRS audit?

That being said, it's important to be aware of “triggers” for IRS audits, below is a list of some of the more egregious items.

  • Unreported income. ...
  • Rental income and deductions. ...
  • Home office deductions. ...
  • Casualty losses. ...
  • Business vehicle expenses. ...
  • Cryptocurrency transactions. ...
  • Day trading activities. ...
  • Foreign bank accounts.

What is the difference between an audit and review?

The report after a review is not considered to provide a professional opinion about the nonprofit's financial statements as a whole. The key difference between an audit and a review is that conducting an audit requires the auditor to obtain independent confirmation or verification of the financial information examined.

Why would my taxes be under review?

How Tax Returns Are Selected for Review. Tax returns can be selected for review for several different reasons, and not all of them indicate a problem. In many cases, the IRS uses automated systems that flag returns with numbers that fall outside normal patterns for a given income level or filing status.

What are the biggest tax mistakes people make?

The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.

How do I know if CRA is auditing me?

A CRA auditor will contact you by mail or phone, or both, to start the audit process and tell you the date, time, and location of the audit. Normally, an on-site audit takes place at your residence, your place of business, or at your representative's office.