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How Long Can the CRA Audit You & How Far Back Can the CRA Audit Your Taxes?

How Far Back can CRA Audit?

The CRA is limited in how far back they can look at someone’s returns  – in most cases.

Normally,  a  CRA waudit the two or three most recent tax years.

If the CRA finds significant discrepancies in their tax audits they have the authority to go further back and audit previous years. If the CRA sees fraud or serious issues with your tax returns, there are no limits as to how far they can audit.

Offshore audits look for unreported income or assets held outside of Canada and are usually longer than a typical audit because it is more serious and there is potentially, more money for the CRA to recover.

That is why offshore audits usually encompass ten years’ worth of tax returns. So if an offshore audit was started in 2018, it usually asks for information and documentation starting in 2008.

Simple reviews where the CRA is only looking for proof of a credit typically only ask about one year.

So, how far back can CRA Audit? The answer is that there is no limit as long as they can justify their results by claiming the taxpayer is lying and / or cheating on their tax returns.

A woman preparing her taxes

Assessments and Reassessments

There are also limits as to how far back the CRA can go with respect to reassessing someone’s tax return. As mentioned above, the CRA administers assessments to promote awareness of and compliance with the laws it administers. The CRA conducts these assessments upon the completion of an audit on the taxpayer. The normal period for reassessment for Canadian income taxes is three (3) years from the date your tax return was initially assessed. For example, if you filed your 2015 income tax return on April 30, 2016, the CRA will issue an initial Notice of Assessment on June 1, 2016. This also means that the Reassessment period will last until June 1, 2019.If you file late  you may also be subject to a  penalty for filing taxes late in Canada.

However, as with audits, there are situations where the CRA can extend the Reassessment period. If the CRA believes the taxpayer has misrepresented their Tax Return due to carelessness or willful action, then the CRA can reassess the Tax Returns at any time. The CRA can do the same if it expects fraud from the taxpayer.

That said, the CRA must be able to prove fraud, neglect or wilful fraud. Simple mistakes on a taxpayer’s return do not equate to fraud. There must be more substantial errors and purposeful errors. The CRA can also reassess a taxpayer’s returns after the three (3) year period has passed if it can produce a waiver that was signed by the taxpayer.

How Long Should I keep CRA Records?

It is important to note that the year limits discussed above are different from how long you are required to retain your financial records and supporting documentation. Taxpayers are required to keep their financial documents and records for six years in case the CRA requests them. For example, you cannot destroy your 2017 tax returns or supporting documentation until 2023.

As an exception, if you filed late returns, the six-year rule applies to the date of filing, not the tax year. Documents should be maintained until the last date of appeal expires or the six-year period ends. Taxpayers should use the latest date as their guideline.

For reassurance, taxpayers should keep their original tax records, including the original tax return, invoices, receipts, cancelled cheques and anything else that supports the declarations they made in their respective tax returns.

If you are being audited or reviewed by the CRA, we can help. It is in your best interest to have a tax lawyer on your side because auditors are only after one thing, your money. Contact us today to learn more.


Pro Tip


The Small Business Deduction gives businesses a tax deduction on the first $500,000 of income. This saves an eligible corporation around up to $50,000 in income taxes. There are a number of conditions that have to be met to be eligible for this deduction.


Sam Faris reduced the significant unreported income based on net worth audit to be nil. Sam’s approach in fighting these types of complex audits is unique and sophisticated. He found countless mistakes made by the auditor which were rectified when Sam appealed the audit decision. Instead of owing significant amount of taxes, Sam reduced it to zero. I highly recommend to hire Sam for this type of audits and any CRA problem.”

E.M., Ottawa