If you’re searching for the tax return deadline in Australia for 2026, the date that applies to you depends on whether you’re lodging as an individual, company, trust or SMSF, and whether you lodge yourself or through a registered tax agent.
For the 2025–26 income year, the standard individual self-lodgment date is 31 October 2026. Because 31 October falls on a Saturday, the ATO’s next-business-day rule means the return can be lodged on Monday, 2 November 2026.
The important point is that there is no single tax return deadline that applies to everyone. Registered tax-agent clients can have later dates under the ATO’s lodgment program, while companies, trusts and SMSFs can have different dates based on their circumstances and if you need help determining your applicable deadline, professional tax accounting services can help you confirm the correct lodgment date.
Quick answer: If you’re an individual lodging your 2025–26 tax return yourself, your practical lodgment date is 2 November 2026. If you’re eligible for the registered tax-agent program, a later date may apply, with 15 May 2027 being the general program date before the weekend adjustment.
Tax Return Due Dates Australia 2026: Quick Summary
| Taxpayer / situation | Key lodgment date | What to know |
| Individual self-lodger | 2 November 2026 | 31 October 2026 falls on Saturday |
| Individual with overdue prior-year return | 31 October 2026 | An agent does not automatically move this to May |
| Individual with latest return tax liability of $20,000+ | 31 March 2027 | Subject to the registered-agent program criteria |
| Most remaining eligible individual agent clients | 15 May 2027 → 17 May 2027 | 15 May falls on Saturday |
| Eligible 15 May concession cases | 5 June 2027 → 7 June 2027 | Concessional arrangement, not a new standard due date |
| Large/medium taxable companies | 15 January 2027 | Applicable program category |
| Relevant large/medium non-taxable or new companies | 28 February 2027 | Applicable program category |
| Companies with income above $2m, where applicable | 31 March 2027 | Earlier category can apply |
| Most remaining eligible company agent clients | 15 May 2027 → 17 May 2027 | Subject to earlier dates |
| Large/medium taxable trusts | 31 January 2027 | Applicable trust category |
| Relevant non-taxable/new trusts | 28 February 2027 | Applicable trust category |
| Trusts meeting the $20,000 tax-liability criterion | 31 March 2027 | Subject to program rules |
| Most remaining eligible trust agent clients | 15 May 2027 → 17 May 2027 | Subject to earlier dates |
| SMSF with overdue prior-year return / applicable new registrant | 31 October 2026 | Circumstance-dependent |
| Taxable large/medium SMSF | 31 January 2027 | Applicable category |
| Other self-preparing SMSFs | 28 February 2027 | Unless an earlier date applies |
| Relevant SMSF with income above $2m | 31 March 2027 | Subject to classification |
| Most remaining eligible agent-lodged SMSFs | 15 May 2027 → 17 May 2027 | Agent confirms actual date |
The ATO’s registered-agent program is category- and circumstance-based, rather than one blanket extension. Current ATO material also distinguishes new SMSFs, overdue returns and different entity categories.
Individual Tax Return Due Date 2026
For an individual lodging their own 2025–26 income year tax return, the statutory deadline is: 31 October 2026
But 31 October 2026 falls on a Saturday.
Under the ATO’s next-business-day rule, the practical lodgment date becomes: Monday, 2 November 2026
So if you are preparing and lodging your own individual tax return, 2 November 2026 is the date to work toward.
What if you use a registered tax agent?
The date can be later.
The registered tax-agent lodgment program provides different dates depending on your circumstances. For many eligible individual clients, the general program date is 15 May 2027.
Because 15 May 2027 is a Saturday, the next-business-day rule makes the practical date Monday, 17 May 2027, where that rule applies.
However, you should not assume that using an accountant automatically gives you until May.
For example, individuals with one or more prior-year returns outstanding at 30 June 2026 can have a 31 October 2026 due date even when using a registered agent. Individuals whose latest return resulted in tax payable of $20,000 or more can also fall into an earlier program category.
Practical action
If you’re planning to use a registered tax agent for your 2025–26 return, confirm your actual ATO due date with the agent rather than assuming it is 15 May.
Company Tax Return Due Date 2026–27
Companies do not follow the individual 31 October deadline.
For a company with a 30 June balance date, the applicable 2025–26 tax-return lodgment date depends on its classification, income and lodgment arrangements.
The major program dates are:
- 15 January 2027
Applies to relevant large and medium companies in the applicable taxable category.
- 28 February 2027
Applies to relevant large and medium companies that fall into the applicable non-taxable or new-registrant categories.
- 31 March 2027
Can apply to companies with total income above $2 million in the latest year lodged, where they are not classified as large or medium.
- 15 May 2027
Applies to remaining eligible companies under the registered-agent program.
Because 15 May 2027 falls on a Saturday, the practical next-business-day date is 17 May 2027, where the weekend rule applies.
Don’t confuse lodgment with payment
A company’s tax-return lodgment date is not necessarily its tax-payment date.
For example, some large and medium companies with a 30 June balance date can have a 1 December 2026 payment date even though their return is lodged later.
So if you’re checking a company’s obligations, confirm both the lodgment and payment dates.
Trust Tax Return Due Date 2026–27
There isn’t one universal trust tax-return deadline.
The applicable date depends on the trust’s classification, tax position, income and lodgment arrangements.
For 2025–26 returns, the major program dates include:
- 31 January 2027
For applicable large and medium trusts that were taxable in the latest year lodged.
- 28 February 2027
For applicable large and medium trusts that were non-taxable in the latest year lodged or fall within the relevant new-registrant category.
- 31 March 2027
For applicable trusts where the latest return produced a tax liability of $20,000 or more, subject to the program rules and exclusions.
- 15 May 2027
For remaining eligible trusts lodged through a registered tax agent.
As 15 May falls on Saturday, the next-business-day date is 17 May 2027, where applicable.
- 5 June 2027
This is a concessionary arrangement, not a universal trust tax-return deadline. Eligible returns otherwise due on 15 May can qualify under the concession where the required conditions are met.
The key takeaway is simple:
Don’t assign a single deadline to every trust. Identify the trust’s applicable ATO lodgment category first.
SMSF Tax Return / Annual Return Due Date 2026–27
For an SMSF, the relevant filing is the SMSF annual return (SAR), which incorporates the fund’s income-tax and regulatory reporting obligations.
The ATO confirms that an SMSF’s lodgment date depends on factors including whether the fund is self-preparing, uses a tax agent and whether it is newly registered.
New or overdue SMSFs
A self-preparing new SMSF, or an SMSF with an overdue prior-year return, can have a:
31 October 2026
deadline for the 2025–26 annual return.
For a new SMSF using a registered tax agent, 28 February 2027 can apply for the first return, although some new funds can still have a 31 October date following the ATO’s registration review.
Other SMSFs
Relevant program dates include:
- 31 January 2027 — applicable taxable large/medium SMSFs
- 28 February 2027 — other self-preparing SMSFs in the applicable category
- 31 March 2027 — relevant funds with income above $2 million
- 15 May 2027 — general registered-agent program date
- 5 June 2027 — eligible concessionary cases
The exact date should be confirmed for the fund rather than assumed from its entity type alone.
One important SMSF planning point
The annual return cannot simply be left until the deadline.
The SMSF needs an approved auditor, and the ATO advises that the auditor should be appointed at least 45 days before the annual return is due. The audit must be completed before the annual return is lodged.
That makes the practical workflow:
Confirm due date → appoint auditor → complete accounts and audit → lodge annual return → address payment obligations.
What Is the Tax Return Deadline for Property Investors?
If you’re a property investor lodging through an individual tax return, owning an investment property does not automatically create a separate tax-return deadline.
You generally follow the deadline applicable to your individual return.
For a self-lodged 2025–26 individual return:
31 October 2026 → 2 November 2026
If you use a registered tax agent and qualify for the agent lodgment program, a later date may apply.
The important question is therefore not:
“Do I own an investment property?”
It is:
“Which taxpayer or entity is lodging the return, and how is it being lodged?”
If the property is held through a company or trust, the relevant entity’s tax-return deadline applies instead.
Does Using a Tax Agent Automatically Give You Until May?
No.
This is one of the most important points to understand about the Australian tax-return deadline.
A registered tax agent can lodge eligible clients under the ATO’s registered-agent program, but the program has different dates and conditions.
For individuals and relevant trusts, the major categories include:
- 31 October 2026 — certain clients with outstanding prior-year returns
- 31 March 2027 — certain taxpayers whose latest return resulted in tax payable of $20,000 or more
- 15 May 2027 — remaining eligible clients
- 5 June 2027 — eligible concessionary cases
And because 15 May and 5 June 2027 fall on Saturdays, the relevant next-business-day dates are 17 May and 7 June 2027, respectively, where the next-business-day rule applies.
What should you do?
If you’re using a registered tax agent, ask them to confirm your actual ATO lodgment date.
Do not simply put 15 May 2027 in your calendar and assume it applies to you.
What If You Miss the Tax Return Deadline?
If your tax return is already overdue, the practical response is:
Lodge it as soon as possible.
Waiting for another deadline does not solve the outstanding obligation.
Depending on the circumstances, late lodgment can result in penalties, while unpaid tax can also attract interest.
If you have an overdue return and use a registered tax agent, ask the agent to check your current ATO lodgment position and whether the ATO has assigned a revised due date.
If you cannot pay the resulting tax liability in full, deal with the payment obligation separately rather than delaying lodgment.
The ATO’s own guidance distinguishes lodgment obligations from payment obligations, and current ATO material confirms that overdue returns can affect future lodgment dates.
Does the Tax Return Deadline Move If It Falls on a Weekend?
In applicable circumstances, yes.
The ATO’s general next-business-day rule means an obligation due on a Saturday, Sunday or relevant public holiday can generally be completed on the next business day.
For the most important 2026 example:
31 October 2026 — Saturday
↓
2 November 2026 — Monday
The same principle is relevant when later program dates fall on weekends.
For example:
- 15 May 2027 → 17 May 2027
- 5 June 2027 → 7 June 2027
The underlying program date should still be shown because that is the date used to define the applicable category; the practical date should then reflect the calendar rule.
Tax Return Deadline Australia 2026: Final Date Checklist
Use this as a quick reference, but confirm the actual ATO date for your taxpayer/entity before relying on it.
| Situation | Program date | Practical date where weekend rule applies |
| Individual self-lodger | 31 Oct 2026 | 2 Nov 2026 |
| Certain individual/trust agent clients with outstanding prior returns | 31 Oct 2026 | 2 Nov 2026 |
| Large/medium taxable company | 15 Jan 2027 | 15 Jan 2027 |
| Large/medium taxable trust | 31 Jan 2027 | 1 Feb 2027 |
| Large/medium taxable SMSF | 31 Jan 2027 | 1 Feb 2027 |
| Relevant non-taxable/new entity category | 28 Feb 2027 | 1 Mar 2027 |
| Relevant $2m+ company/SMSF category | 31 Mar 2027 | 31 Mar 2027 |
| Relevant individual/trust $20k+ tax-liability category | 31 Mar 2027 | 31 Mar 2027 |
| Most remaining eligible agent clients | 15 May 2027 | 17 May 2027 |
| Eligible concessionary returns | 5 Jun 2027 | 7 Jun 2027 |
The January and February dates above fall on Sundays in 2027, so the next-business-day dates are shown separately rather than incorrectly presenting the calendar date as the actual working-day deadline.
The exact applicable date can still depend on the taxpayer’s circumstances, ATO instructions and registered-agent program status.
FAQs
When is the tax return due in Australia in 2026?
For an individual lodging their own 2025–26 tax return, the statutory deadline is 31 October 2026. Because that date falls on a Saturday, the practical next-business-day date is 2 November 2026.
What is the tax return deadline if I use an accountant?
If you’re eligible for the registered tax-agent lodgment program, your deadline can be later. 15 May 2027 is the general program date for many eligible clients, but earlier dates can apply. Because 15 May falls on Saturday, the next-business-day date is 17 May 2027, where applicable.
Does using a tax agent automatically extend my tax return deadline?
No. Your actual due date depends on your circumstances and the ATO’s registered-agent program. Outstanding prior-year returns and other factors can result in an earlier deadline.
Do companies and trusts have the same tax return deadline?
No. Their deadlines depend on their classification, income and lodgment arrangements. Relevant dates can include January, February, March and May 2027.
Do SMSFs have the same tax return deadline as individuals?
Not necessarily. SMSFs lodge an annual return, and the applicable date depends on factors such as whether the fund is newly registered, self-preparing, using a tax agent or has outstanding returns.
Does a property investor have a different tax return deadline?
Generally, no if the property investment is reported through an individual tax return. The applicable individual deadline applies. If the property is held through another entity, that entity’s deadline needs to be considered.
What happens if I miss my tax return deadline?
Lodge the return as soon as possible and address any resulting tax payment obligation. Depending on the circumstances, late-lodgment penalties and interest can apply. If you use a tax agent, ask them to check your current ATO lodgment position.
Is 5 June 2027 the final tax return deadline?
No. 5 June is a concessionary arrangement for eligible returns, not a universal replacement for the 15 May due date. The relevant eligibility and payment conditions must be met.
Final Takeaway
For most people searching “tax return deadline Australia”, the first date to know is:
2 November 2026
That’s the practical deadline for an individual who is self-lodging a 2025–26 tax return because 31 October 2026 falls on a Saturday.
But there is no single deadline for every Australian taxpayer.
Individuals, companies, trusts and SMSFs can fall into different ATO lodgment categories, while registered tax-agent clients may have later dates depending on their circumstances.
The safest approach is:
Identify your taxpayer/entity type → check how you’re lodging → check your ATO circumstances → confirm the applicable deadline → lodge before that date.
That is more reliable than assuming that 31 October or 15 May applies to everyone.
Note: This article provides general information based on current ATO guidance and is not individual tax advice. For an entity-specific deadline, confirm the applicable date with the ATO or your registered tax agent.