Let me ask you something: when that letter from the CRA arrives in your mailbox or inbox do you actually read it?. Do you just check whether you’re getting a refund and toss it aside? I’ll be honest I used to do the thing. But here’s what I’ve learned: your Notice of
Assessment is one of the important documents you’ll receive all year. It’s not a receipt, it’s your official record with the CRA and it contains critical information that affects your finances for years to come. Your Notice of Assessment is the Canada Revenue Agencys summary of your processed tax return.
In this guide I’ll walk you through what your Notice of Assessment contains how to read it correctly and what to do if something doesn’t look right. Whether you’re filing your tax return or you’ve been doing this for decades understanding your Notice of Assessment is essential for protecting your financial health.
What Is a Notice of Assessment
Let me start with a clear definition. Your Notice of Assessment (NOA) is the document the Canada Revenue Agency sends you after they’ve finished reviewing your tax return. It’s the CRAs summary of what you earned what you claimed and what they agree you owe or should get back. Some people think the Notice of Assessment is a receipt, proof that the CRA received your tax return. It’s that. Its so much more.
Your Notice of Assessment is also the CRAs determination of your tax situation for the year. The calculations you did on your tax return are your estimate. The Notice of Assessment is the CRAs word. If theres a difference between the two your Notice of Assessment is the document that counts.
How to Read Your Notice of Assessment
Your Notice of Assessment might look intimidating. Its actually organized into clear sections that are easy to follow once you know what you’re looking at. Let me walk you through each part.
Account Summary
This is the section you’ll see and it tells you the bottom line. Your account summary shows the result of your assessment, whether you’re getting a refund you owe money or you have a zero balance. This is what most people look at first. Its important, but don’t stop here.
Tax Assessment Summary
The next section shows the amounts used to calculate your refund or balance owing. This is where you can see how the CRA arrived at their conclusion. Compare these numbers to what you submitted on your tax return, if there are discrepancies this section will help you spot them.
Explanation of Changes
If the CRA changed anything on your tax return, adding income, disallowing a deduction or correcting an error, this section explains what they fixed and why. This is arguably the important part of your Notice of Assessment. Don’t skip it. If you don’t understand why a change was made call the CRA. Talk to a tax professional.
RRSP Deduction. Other Important Information
Your Notice of Assessment also includes your RRSP deduction limit for the tax year. If you’re a student you’ll see unused tuition amounts you can carry forward. You’ll also find Home Buyers Plan and Lifelong Learning Plan information. These are details you’ll need when filing your taxes next year keep your Notice of Assessment safe.
The 2026 Changes: How You'll Access Your Notice of Assessment
The CRA made some changes to how Notices of Assessment are delivered in 2026. February 9 2026 Notices of Assessment and reassessment are available exclusively through CRA portals My Account, My Business Account and Represent a Client. Since February 9 2026, Notices of Assessment and reassessment are available to view through CRA portals right after the CRA receives and processes your tax return.
If you don’t have a CRA account or you’ve opted to receive paper mail your notice will continue to be mailed to the address on file. The CRA encourages everyone to register for mail; it’s faster more secure and better for the environment. Notices of assessment and reassessment are no longer delivered through tax software.
Notice of Assessment vs. Notice of Reassessment
Here’s something many Canadians don’t realize: there’s a difference between a Notice of Assessment and a notice of reassessment. Your Notice of Assessment is the document the CRA issues after first processing your return. A notice of reassessment is issued when the CRA reviews an assessed return and makes changes adding income, disallowing deductions or correcting figures.
You might receive a notice of reassessment if you forgot to report income if the CRA finds an error or if you requested an adjustment to your return. The notice of reassessment is an updated summary of the changes. It’s just as important as your Notice of Assessment, review it carefully.
Why Your Notice of Assessment Matters for Benefits and Future Tax Years
Your Notice of Assessment isn’t for the current year, it’s essential for accessing government benefits and planning future taxes. You’ll need your Notice of Assessment to get child benefits, dental benefits, workers benefits and disability benefits. The RRSP deduction limit shown on your Notice of Assessment tells you how much you can contribute to your RRSP next year without penalties.
If you have tuition amounts your Notice of Assessment shows the balance you can carry forward. Your Home Buyers Plan and Lifelong Learning Plan repayment obligations are tracked on your Notice of Assessment. Without these numbers you might over-contribute to your RRSP miss out on tuition credits or fail to repay your HBP on time. Keep every Notice of Assessment you receive; you’ll need them year after year.
What to Do If You Disagree with Your Notice of Assessment
Sometimes the CRA makes mistakes. If you review your Notice of Assessment and disagree with a change or calculation you have options. First compare your Notice of Assessment to your tax return. Check that all your income, deductions and credits were properly included. If you find an error on the CRAs side you can request an adjustment to your return. If that doesn’t resolve the issue you can file an objection, but you must do this within 90 days of the date your Notice of Assessment was issued. Don’t wait, the deadline is strict and missing it can limit your options.
Common Reasons for CRA Changes to Your Tax Return
If your Notice of Assessment shows changes from your tax return there’s usually a reason. Common triggers include discrepancies in income, the CRA compares what you report with what employers and financial institutions send them. Claiming deductions or credits you’re not eligible for can also trigger changes. Simple data entry errors, typos or transposed numbers are another cause. Sometimes the CRA will flag your return for review at random. Whatever the reason your Notice of Assessment will explain the changes. If you don’t understand the explanation call the CRA. Talk to a tax professional.
Conclusion
Your Notice of Assessment is one of the important documents you receive from the CRA. It’s not a receipt, it’s your official tax record your guide for future filings and your first line of defense against errors. Review your Notice of Assessment carefully every year. Compare it to your tax return. Keep it in a place, you’ll need it for years to come. If something doesn’t look right act quickly. You have 90 days from the date of your Notice of Assessment to dispute changes.
Understanding your Notice of Assessment isn’t about knowing what you owe or what refund you’re getting; it’s about taking control of your financial health. Don’t let that letter sit unopened. Your Notice of Assessment is your conversation with the CRA; make sure you’re listening.
Frequently Asked Questions (FAQs)
A Notice of Assessment (NOA) is the document the CRA sends you after processing your tax return. It shows your income, credits, deductions. Whether you owe taxes or are getting a refund.
Starting February 9 2026 Notices of Assessment are now available exclusively through CRA portals. My Account, My Business Account and Represent a Client. Paper copies are only sent if you don't have a CRA account or have opted for mail delivery.
Your Notice of Assessment includes an account summary (refund or balance owing) tax assessment summary, explanation of changes RRSP deduction limit and other important information like tuition amounts.
Your Notice of Assessment is issued after processing your return. A notice of reassessment is issued when the CRA later makes changes to your return.
First, compare your Notice of Assessment to your tax return. If you still disagree you can request an adjustment. File a formal objection within 90 days of the date your Notice of Assessment was issued.
Your Notice of Assessment contains information for future tax years including your RRSP deduction limit, unused tuition amounts and repayment obligations, for the Home Buyers Plan. Its also required to access child benefits, dental benefits, workers benefits and disability benefits.
Co-Founder & Director
Hafil Perincheeri is an engineer-turned-realtor, investor, and builder based in Calgary, Canada. As Co-Founder and Director of Greencasa, he specializes in home flips, property development, and investment strategies. Since 2019, he has guided clients in home buying, multifamily investing, and financing options like CMHC and MLI Select, ensuring transparent, informed decisions.