Doing your tax return in Australia means reporting last financial year’s income and claimable deductions to the ATO, usually online through myTax or with a registered tax agent. If you lodge it yourself, the deadline is 31 October. Most people can do it in under an hour once their paperwork is sorted.
Below is the no-drama version: the dates, the documents, the two main ways to lodge, and what happens after you hit submit.
When the financial year runs and when you must lodge
The Australian financial year runs from 1 July to 30 June. So the return you do in mid-2026 covers the year that ended 30 June 2026.
If you lodge your own tax return, you must do it by 31 October. Miss that and you can cop a failure-to-lodge penalty, though the ATO often shows some leniency, especially if you are due a refund rather than owing money.
There is a handy loophole if you use a registered tax agent: agents generally get an extended lodgment program, so being on their books before 31 October usually buys you a later deadline, sometimes well into the following year. You have to be signed up with them before the October cut-off, though. Rocking up to an agent in March does not retroactively save you.
What you need before you start
The good news is that myTax pre-fills a lot for you. Employers, banks, government agencies and health funds report data to the ATO, so by late July most of it appears automatically. Still, it pays to wait until your information is marked “ready” rather than lodging the day after 1 July with half the data missing.
Here is the short list of what to have on hand:
- Your income statement (formerly the group certificate) from each employer, available through myGov once finalised.
- Bank interest, dividends, and any managed fund or share trading records.
- Records of deductions: work-related expenses, donations, the cost of managing your tax affairs, and so on.
- Private health insurance details, which affect the Medicare levy surcharge and any rebate.
- Details of any side income, including the gig economy, rideshare, or a rented-out room.
If your deductions feel like a guessing game, our guide to common tax deductions in Australia walks through what you can and cannot claim without raising eyebrows. It is worth a read before you start typing numbers into boxes.
It also helps to sort your finances before tax time so your records are tidy rather than scattered across three banks and a shoebox. Future you will be grateful.
The two ways to lodge
Most Australians use one of two paths. Neither is “better” universally: it depends on how complex your affairs are and how confident you feel.
| Option | Best for | Cost | Deadline |
|---|---|---|---|
| myTax via myGov | Straightforward salary-and-wages returns | Free | 31 October |
| Registered tax agent | Complex affairs, investments, businesses, or peace of mind | Fee (often deductible next year) | Usually extended if on their books by 31 October |
Doing it yourself with myTax
Link your myGov account to the ATO, open myTax, and most of your income is already sitting there. Your job is to check it is correct, add anything missing, and enter your deductions. The system tallies the result and tells you whether you are getting a refund or have a bill.
Before you lodge, it is worth a quick sanity check on what you are likely to get back or owe. Running the numbers through an income tax calculator for Australia can flag an obvious error, like a forgotten income source, before the ATO does.
Using a registered tax agent
A registered tax agent costs money, but a good one often finds deductions you would have missed and takes the stress off your plate. Make sure they are actually registered with the Tax Practitioners Board. The fee you pay is generally deductible on next year’s return, which softens the blow.
If your return involves investment properties, shares, or a business, the agent fee usually pays for itself in time saved and mistakes avoided.
How deductions and tax actually work
A deduction reduces your taxable income, not your tax bill dollar for dollar. So if you earn $80,000 and claim $2,000 in deductions, you are taxed as though you earned $78,000. The actual saving depends on your marginal rate, which is why understanding the Australian tax brackets helps you set realistic expectations rather than dreaming of a windfall.
To claim a work-related deduction, three things generally need to be true: you spent the money yourself and were not reimbursed, it directly relates to earning your income, and you have a record to prove it. No receipt, no claim, as a rule. The ATO has been increasingly pointed about this, so resist the urge to round up.
After you lodge: refunds and bills
Once you submit through myTax, refunds typically arrive in about two weeks, often sooner. Paper returns take considerably longer, which is one more reason to lodge online.
If you owe money rather than receiving a refund, the ATO will issue a notice of assessment with a due date. Do not ignore it. If the amount is awkward, you can usually arrange a payment plan rather than scrambling for a lump sum.
A quick reality check: a refund is not free money. It usually means too much tax was withheld from your pay during the year, so the ATO is handing back what was always yours. A bill, conversely, often means not enough was withheld. Neither is a reward or a punishment, just arithmetic catching up.
A note on advice
This article is general information, not personal financial, tax, or legal advice. Everyone’s situation differs, and the figures, thresholds and rules mentioned here can change. Always confirm the current detail with the ATO, your registered tax agent, or your super fund or insurer before acting. Where dollar figures or dates appear, they were last checked June 2026.
The bottom line
Doing your tax return in Australia is rarely as painful as the dread suggests. Wait until your income data is ready, gather your deductions and health details, then lodge through myTax or hand it to a registered agent. Self-lodgers have until 31 October; agent clients usually get longer. Lodge online and your refund, if you are due one, generally lands within a fortnight. Keep your records tidy and honest, confirm anything uncertain with the official source, and the whole exercise becomes a once-a-year tidy-up rather than a crisis.