The Australian Taxation Office (ATO) requires most people to submit their income tax return online or by paper by 31 October each year. Missing the ATO 31st October deadline can lead to ATO penalties such as late lodgement penalty fees and interest charges.
If you lodge your tax return yourself using myTax through your myGov account, you must submit it by this date. Using a registered tax agent can give you more time to lodge returns, but you need to register with them before 31 October.
This guide explains who must lodge a tax return, what happens if you miss the cut-off, and how a tax agent can help. It also covers refunds, documents you need, and tips to make the process easier, including how to use linked services and the ATO app for better record keeping.
What Is the ATO 31st October Tax Return Deadline?
The 31st October deadline is the last day for most Australians to submit their income tax return if lodging on their own. It covers income earned from 1st July to 30th June of the financial year.
The rule applies whether you lodge online using myTax, lodge a tax return by paper, or through other linked services. Lodging after the deadline without approval can trigger ATO penalties such as late lodgement penalty fees.
If you use a registered tax agent, you may get more time. The extended deadline is usually 15 May of the following year. To qualify, you must register with the agent before 31st October and have a good record with the ATO, including no outstanding overdue returns or tax debts.
Meeting the deadline helps you avoid fines and ensures refunds are processed faster.
Who Needs to Lodge a Tax Return by October 31st?
Not everyone needs to lodge a return, but most Australian residents do. The ATO sets out clear rules on who must lodge.
Australian Residents Above the Tax-Free Threshold
If you earned more than $18,200 in the financial year, you must lodge a tax return. This includes wages, salaries, casual work, income from government agencies, and payments from health funds.
People With Investment Income
Even if you earned less than $18,200, you must lodge if you received income from shares, rental properties, managed funds, or if you made a capital gain from selling assets.
Business Owners and Sole Traders
Sole traders, contractors, and partnerships must lodge a return every year. You must report both your income and deductions, including those related to business activity statements (BAS).
Companies
All companies must lodge a tax return, even if they made a loss. If a company closes, a final return must be lodged before deregistration.
Low or No Income Earners
If you earned less than $18,200 and had no taxable income, you may not need to lodge. However, you must still notify the ATO by submitting a non lodgement advice or non-lodgement advice.
What Happens If You Miss the 31st October Deadline?
Missing the ATO 31st October deadline can cost you money and increase your risk of audit.
Late Lodgement Penalties
The ATO charges $330 every 28 days your return is late. The penalty can reach $1,650. This applies even if you are due a refund.
Interest on Tax Debts
If you owe tax, the ATO adds a general interest charge (GIC). This is extra interest that builds daily until the debt is paid.
Higher Risk of Audit
Late returns draw more attention. Missing deadlines increases the chance of an audit.
Severe Cases
If you continue to ignore your obligations, the ATO can issue larger fines. In serious cases, you may face up to $9,000 in penalties or even prison.
What to Do if You Miss the Deadline
Act quickly. Contact the ATO or a registered tax agent. In some cases, the ATO may reduce penalties if you have a valid reason for being late. You can also use the ATO app or chat service to get assistance.
How Registered Tax Agents Can Extend Your Deadline
A registered tax agent can extend your deadline past 31st October. In most cases, the new date is 15 May of the following year.
Eligibility for an Extension
You must register with a tax agent before 31st October to get the extension. You also need a good lodgement history and no serious unpaid tax debts.
Benefits of Using a Tax Agent
Tax agents do more than extend deadlines. They review your return, make sure all income is reported, and help you claim all eligible deductions. This is especially helpful for people with businesses, property, or complex tax matters.
Exceptions to the Extension
If you already have overdue returns, the ATO may not grant the May extension. In that case, you need to lodge quickly to reduce penalties.
Peace of Mind
Using a professional ensures your return is accurate. It also lowers the risk of audit and gives you confidence that you are meeting your obligations.
Key Dates for Businesses and Sole Traders
The October 31st deadline applies to individuals, but businesses and sole traders also have other dates to meet.
Business Activity Statements (BAS)
Businesses that report GST, PAYG withholding, or PAYG instalments must lodge a BAS. The due dates are:
- Quarter 1 (July–September): 28 October
- Quarter 2 (October–December): 28 February
- Quarter 3 (January–March): 28 April
- Quarter 4 (April–June): 28 July
If you use a registered tax or BAS agent, you may get a short extension.
Sole Traders and Partnerships
Sole traders and partnerships must lodge a yearly return that includes income and deductions. If you self-lodge, the due date is 31st October. Using a tax agent may extend the deadline.
Companies
Companies must lodge a separate tax return. Even if a company closes, a final return must be lodged before deregistration.
What You Need Before Lodging Your Tax Return
Having your documents ready before you start makes lodging faster and easier. The ATO expects accurate details.
Income Records
- Payment summaries or income statements from employers
- Bank interest statements
- Dividend and investment income statements from government agencies and health funds
- Rental property income records
- Business income records for sole traders or partnerships
Deduction Records
- Receipts for work-related expenses such as uniforms, tools, or travel
- Investment property expenses including repairs, insurance, and management fees
- Charitable donations receipts
- Records of education or training expenses
Other Information
- Bank account details for refunds
- Private health insurance statements
- Capital gains or losses from selling shares or property
When Will You Receive Your Refund?
Refund times vary depending on how you lodge and whether the ATO needs more details.
Online Lodgement
If you lodge online with myTax, refunds usually take about two weeks. You can track progress through your myGov account.
Paper Lodgement
Paper returns take longer. Refunds can take up to 50 business days.
Delays
Refunds may be delayed if:
- The ATO requests more information
- You have debts with the ATO or another agency
- There are errors in your return
How to Speed It Up
Check your details carefully before lodging. Provide bank details for direct deposit. Lodge after mid-July to use pre-filled ATO data from linked services, which reduces mistakes.
Tips to Avoid ATO Pain
Following these steps can help you stay compliant and avoid extra costs.
Lodge at the Right Time
Wait until mid to late July before lodging. By then, most of your details are pre-filled by the ATO from government agencies, health funds, and other sources.
Use a Registered Tax Agent
Tax agents can extend your deadline, improve accuracy, and ensure you claim all deductions.
Keep Records All Year
Save receipts, invoices, and statements during the year. Digital copies are acceptable. Good records make tax time easier. Use the ATO app to keep track.
Catch Up on Missed Returns
If you have overdue returns, lodge them as soon as possible. The ATO may reduce penalties if you act quickly.
Track Business Deadlines
Business owners should mark BAS and tax dates in advance. Planning ahead prevents late lodgement penalties.
FAQs on the ATO 31st October Tax Deadline
1. Can I get an extension if I miss 31st October?
Yes, but only if you are already registered with a tax agent before 31 October.
2. What happens if I earned less than $18,200?
If your income is under the threshold and you had no other taxable income, you may not need to lodge. You must still submit a non lodgement advice.
3. What penalties apply for late lodgement?
The ATO charges $330 every 28 days a return is late, up to a maximum of $1,650. Interest applies if you owe tax.
4. Can I still claim deductions if I lodge late?
Yes, you can still claim deductions. But late penalties may reduce your refund.
5. When will I get my refund?
Most online refunds are processed within two weeks. Paper returns can take up to 50 business days.
Ensure You Meet The ATO 31st October Deadline
The ATO’s 31st October deadline is one of the most important tax dates of the year. Lodging on time avoids penalties, reduces the chance of audit, and helps refunds arrive faster.
If you need more time, register with a tax agent before 31st October. This may extend your deadline until 15 May.
By staying organised, keeping records, and seeking advice when needed, you can make tax time simple. Whether you are an employee, sole trader, or business owner, meeting the deadline keeps you compliant and in control of your tax affairs.
