Breadcrumb
Home / Resources / Tax Return Dates & Deadlines
Resources · Dates & Deadlines
Tax Return Dates & Deadlines for 2026–27
Every date that matters for lodging your Australian tax return, from the day the financial year opens to the deadline for lodging through a registered tax agent.
-
Key ATO dates
-
Self-lodge vs agent deadlines
-
BAS due dates included
Free to start · Certified tax agent review included · From $88
Lodging through a registered tax agent like Tax Falcon can extend your deadline well past 31 October
Hero Visual: “Key Dates at a Glance” (illustrative mock-up)
-
1 July 2026 — Financial year opens
-
31 Oct 2026 — Self-lodge deadline
-
2027 — Agent-extended deadline (varies)
Illustrative example only — your specific deadline depends on when you engage a registered tax agent.
✓ Interestingly, this hero mock-up card itself uses 2026 dates (1 July 2026 open, 31 Oct 2026 self-lodge deadline) consistent with the FY2025–26 cycle — which conflicts with the H1, meta description, and Quick Answer section immediately below it, which all frame the page around FY2026–27 (1 July 2026 to 30 June 2027, deadline 31 Oct 2027). The page is inconsistent even with its own hero visual.
Quick Answer (direct-answer callout)
The 2026–27 Australian financial year runs from 1 July 2026 to 30 June 2027. If you lodge your own tax return, the deadline is 31 October 2027. If you're registered with a tax agent like Tax Falcon by 31 October, your deadline is generally extended well into the following year, the exact date depends on your lodgement program and history.
The Big Ones
The Headline ATO Dates
These are the dates most people actually need to know.
1 July 2026
The 2026–27 financial year begins. From this date you can start preparing to lodge for the year ending 30 June 2027.
31 October 2027
The standard deadline to lodge your own 2026–27 tax return if you're not registered with a tax agent.
15 May 2027
The typical final date for individual returns lodged through a registered tax agent, for the prior financial year.
28 February 2027
The lodgment deadline for individual tax returns for those who don't lodge with a tax agent by 31 October and haven't received a further extension, once a default assessment or penalty process may begin.
⚠ These four dates are not internally consistent with each other. “1 July 2026” and “31 October 2027” fit a FY2026–27 framing (opens July 2026, self-lodge deadline October 2027). But “15 May 2027” is explicitly labeled “for the prior financial year”, which — read literally against the page's own FY2026–27 framing — would mean FY2025–26, i.e. a date that falls chronologically before the FY2026–27 self-lodge deadline the page just stated. And “28 February 2027” as a late-lodgment consequence date sits between the other two, muddying the sequence further. The dates read as though they were assembled from two different years' worth of ATO lodgment-program dates rather than one consistent cycle.
If You Lodge Yourself
The Self-Lodgment Timeline
From 1 July
Income statements and ATO pre-fill data start becoming available. Earlier lodgers should double check pre-fill is complete before submitting.
Through October
The window to gather documents, claim deductions and lodge before the 31 October deadline.
31 October
Your tax return must be lodged by this date if you're not registered with a tax agent.
If You Use a Tax Agent
The Registered Agent Timeline
Registering with a tax agent like Tax Falcon before 31 October generally extends your lodgment deadline significantly, sometimes into the following May.
Register by 31 October
You need to be on a registered agent's books by this date for the extension to apply.
Extended deadlines vary
Your exact extended deadline depends on the agent's lodgment program and your own lodgment history.
Later is still better than never
Even if you've missed 31 October, registering with an agent as soon as possible can help minimise penalties.
Running a Business
Quarterly BAS Due Dates
If you're registered for GST, your Business Activity Statement is generally due on these dates.
-
Q1 (Jul–Sep) → 28 October
-
Q2 (Oct–Dec) → 28 February
-
Q3 (Jan–Mar) → 28 April
-
Q4 (Apr–Jun) → 28 July
Missed a Deadline?
What Happens If You're Late
Failure to lodge penalty
The ATO can apply a penalty for every 28-day period your return is overdue, up to a set maximum.
Interest on any tax owing
General interest charge applies to any amount you owe from the original due date, even if you lodge late.
Registering with an agent helps
Getting onto a registered agent's books, even after missing 31 October, can help reduce further penalties.
Why Tax Falcon
We Keep You on the Right Side of Every Deadline
Automatic extension eligibility
Registering with Tax Falcon before 31 October puts you on our lodgment program, extending your deadline.
Certified tax agent review
A certified tax agent reviews your return before it's lodged, so deadlines don't mean rushed, careless returns.
Keep Reading
Related Resources
The Complete Tax Deductions Guide (linked card)
What you can and can't claim, including the new $1,000 instant deduction.
→ /tax-deductions-guide-australia
Tax Return Checklist Australia 2026 (linked card)
Every document and detail you need before you start your return.
Standard Tax Return — $88 (linked card)
See exactly what's included when you lodge with Tax Falcon.
✓ These three related-resource pages (Deductions Guide, Checklist, and this Dates & Deadlines page) all correctly link to each other and to the Standard Tax Return page — a clean, fully cross-referenced trio of resource articles, aside from the year-framing issue on this page.
Questions
Dates & Deadlines FAQs
When does the 2026–27 tax year start?
The 2026–27 Australian financial year runs from 1 July 2026 to 30 June 2027.
What is the tax return deadline if I lodge myself?
If you're not registered with a tax agent, the standard deadline to lodge your own tax return is 31 October.
Can a tax agent really extend my deadline?
Yes. Registering with a registered tax agent like Tax Falcon before 31 October generally gives you access to an extended lodgment program, often pushing your deadline into the following year.
What if I miss the 31 October deadline and I'm not with an agent?
You may still be able to lodge late, but penalties and interest can apply. Registering with a tax agent as soon as possible can help reduce further penalties.
When is BAS due if I'm registered for GST?
Quarterly BAS is generally due on 28 October, 28 February, 28 April and 28 July for the relevant quarter.
Does the deadline change if I'm a sole trader or investor?
The core lodgment deadlines are the same, 31 October for self-lodgers, with agent extensions available, regardless of whether your return includes business, property or investment income.
⚠ The first FAQ answer restates the FY2026–27 framing (“The 2026–27 Australian financial year runs from 1 July 2026 to 30 June 2027”) as if it were the year someone visiting the page right now would be asking about — reinforcing the year-mismatch issue flagged at the top of this document.
Don't Let a Date Sneak Up on You.
Register with Tax Falcon before 31 October to lock in an extended deadline and get your return reviewed by a certified tax agent.
From $88 for a standard return · No hidden fees