What Is a Notice of Assessment?
Published on June 25, 2025
Receiving a Notice of Assessment from the Australian Taxation Office (ATO) is a key part of managing your tax affairs in Australia. For many individuals and businesses, this important document can prompt questions about what it means for your tax position, how your income tax return was assessed, and what steps to take if you owe tax or are expecting a tax refund.
What Is a Notice of Assessment and Why Does It Matter?
A Notice of Assessment is an official document issued by the Australian Taxation Office (ATO) after the ATO receives and processes your income tax return for the relevant financial year. This notice summarises your taxable income, all the deductions you’ve claimed, any tax offsets or credits applied, and your final tax payable or refund amount.
The notice acts as a summary of your tax assessment and is an important document for your tax records. It confirms your tax position for the financial year, showing whether you’ve paid enough tax, if you owe a tax debt, or if you’re entitled to a tax refund. The ATO uses information from your tax return, as well as data from employers, banks, and other sources, to ensure your assessment is accurate and up to date.
For individuals and businesses, receiving a Notice of Assessment is a key part of staying compliant with Australian tax laws. It’s also a useful reference if you need to provide details for loan applications or when managing multiple financial years of tax records.
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Key Details in Your Notice of Assessment
Your Notice of Assessment contains several sections that help you understand your tax position for the relevant financial year. It’s important to review the assessment carefully to make sure all the details are correct and to spot any discrepancies early.
Taxable Income, Deductions, and Tax Offsets
One of the first things you’ll see on your notice is your taxable income. This includes income from employment, rental income, investment returns, and any capital gains tax events. The notice also lists all the deductions you’ve claimed, such as work-related expenses or charitable donations, and any tax offsets or credits that reduce your tax payable.
Tax offsets, like the low-income tax offset or private health insurance rebate, can make a significant difference to your final balance. The notice shows how these offsets and credits have been applied to your assessment.
Tax Payable, Refunds, and Other Tax Debts
Your notice will clearly state your tax payable or tax refund amount. If you’re due a refund, the ATO usually deposits it directly into your nominated account, or you may receive a refund cheque if you haven’t provided bank details. If you owe tax, the notice will include a due date for payment and instructions on how to pay, such as through BPAY, credit card, or ATO online services.
If you have other tax debts or outstanding balances from previous financial years, these will also appear on your notice. The ATO may apply credits or offsets to reduce your debt, and sometimes you’ll see interest amounts if your tax was paid late or if the ATO credits interest amounts to your account.
Medicare Levy, Surcharge, and Capital Gains Tax
Your notice will also show any Medicare levy or surcharge applied, as well as details of any capital gains tax you may owe from selling assets. These amounts are calculated based on your income and circumstances for the relevant financial year.
How to Access and Manage Your Notice of Assessment
The ATO offers several ways to access your notice, making it easy to keep your tax records organised and up to date.
Accessing Your Notice Online
Most individuals and sole traders receive their notice through their myGov account, where you can view details, download a PDF copy, or print the document. Simply log in, select the “Tax” drop down menu, and choose the relevant financial year to see your assessment online. If you use a registered tax agent, they can access your notice through ATO online services and provide further assistance if needed.
Paper Lodgement and Replacement Cheques
If you lodge your tax return by paper, you’ll receive your notice by post. If you lose your notice or refund cheque, you can request a replacement cheque or another copy of your notice through the ATO’s systems.
Accessing Notices for Multiple Financial Years
If you need notices from multiple financial years, you can request these through your myGov inbox, your tax agent, or by submitting a request to the ATO. Keeping your tax records complete is important for managing your tax affairs and providing supporting documentation if needed.
Understanding Tax Payable, Refunds, and Tax Debts
Your Notice of Assessment finalises your tax position for the year, but sometimes the outcome may not match your expectations. Here’s what to look for and what to do next.
Why You Might Owe Tax or Get a Refund
You may owe tax if not enough tax was withheld from your income, if you have untaxed income such as rental income or capital gains, or if you’re no longer eligible for certain offsets or credits. On the other hand, you may receive a refund if your credits and offsets exceed your tax payable.
If you find you owe tax and are experiencing financial hardship, the ATO offers payment plans and can provide further assistance. If you’re due a refund, expect it to be processed within two weeks for online lodgements, though paper lodgement may take longer.
Managing Tax Debts and Financial Hardship
If you can’t pay your tax debt by the due date, contact the ATO immediately or speak to your registered tax agent for help. The ATO can work with you to set up a payment plan or discuss options if you’re facing serious financial hardship.
Reviewing Your Assessment Carefully
It’s important to check your assessment carefully for errors or omissions. Make sure all your income, deductions, and credits are correct, and that your tax offsets and other details match your expectations. If you spot a mistake, you can request an amended notice or lodge an objection.
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What to Do If You Disagree with Your Notice of Assessment
Sometimes, you might disagree with the ATO’s decision or notice. Here’s how to take appropriate action.
Lodging an Objection or Requesting an Amended Notice
If you believe your assessment is incorrect, you can lodge an objection through your myGov account, by paper, or with the help of your tax agent. Be sure to include all relevant information and supporting documentation, such as receipts or contracts. The ATO will review your objection and may issue an amended notice if they agree with your claim.
Appealing Further
If you’re not satisfied with the outcome, you can escalate your case to the Administrative Appeals Tribunal or, in some cases, the Federal Court. These options are available if you believe the ATO’s decision does not reflect your tax position or the relevant tax laws.
Timelines, Processing, and Keeping Your Tax Records Organised
The ATO processes most online tax returns and issues notices within two weeks, while paper lodgement can take up to 10 weeks. Keep your notice and all related tax records for at least five years, as you may need them for future reference, loan applications, or if the ATO reviews your tax affairs.
If you need to access your notice for multiple financial years, use your myGov account, contact your tax agent, or request copies directly from the ATO. Staying organised helps you manage your tax affairs efficiently and respond quickly to any issues.
Conclusion
Your Notice of Assessment is a key document for understanding your tax position, keeping your tax records complete, and staying compliant with Australian tax laws. By reviewing your assessment carefully, you can spot errors, plan for payments or refunds, and take appropriate action if you disagree with the outcome. If you need help interpreting your notice, managing a tax debt, or navigating complex tax affairs, our experienced team at ACT Tax Group is here to provide friendly, professional support.
Lukasz Klekowski
