Introduction
An Australian "2026 business tax return" covers the 2025–26 income year, which runs from 1 July 2025 to 30 June 2026. The right form, due date and schedules depend on your structure and accounting period.
Many owners mix up the annual return with BAS, PAYG and payroll reporting. They are separate. A missed filing can trigger interest and penalties, and the ATO's general interest charge sits at 11.51% a year for October to December 2026.
This guide covers who must lodge, which ATO form applies, how to prepare the return, related obligations to keep separate, and where to verify current instructions.
Key Takeaways
- Match your structure and income year to the correct ATO return first.
- Confirm your lodgment date with the ATO or your tax agent.
- Reconcile accounts, GST, payroll and PAYG data before completing the form.
- Lodging and paying are separate tasks, and an extension does not defer payment.
Who Needs to Lodge a 2026 Australian Business Tax Return?
Structures with an annual lodgment obligation
- Sole traders report business income in their individual return. The ATO says there is no income threshold: a person who carried on a business must lodge even if it earned nothing.
- Companies lodge their own company tax return, separate from owners' personal income.
- Partnerships and trusts each lodge their own return on separate ATO forms.
Losses, inactivity and closures
A loss or quiet year does not automatically remove the duty to lodge. A company must lodge a final return before closure and ASIC deregistration. Once deregistered, it can no longer lodge.
Do not assume a blanket exemption for inactive companies, partnerships or trusts. Check current ATO guidance for your entity.
What the income tax return does not cover
One filing never satisfies everything. Keep these separate:
- BAS for GST and PAYG instalments
- PAYG withholding annual reporting
- FBT returns, where there is an FBT liability
- Single Touch Payroll reporting
- ASIC's company annual review
Business Tax Return Forms and Schedules by Entity
Before choosing a form, confirm the legal structure, ABN, residency status, income year and any tax elections. Foreign ownership alone does not decide it. The ATO says a foreign-resident entity with Australian-source income must lodge an Australian return and pay tax on it.
| Entity | 2026 form |
|---|---|
| Sole trader | Individual tax return 2026, plus the Business and professional items (BPI) schedule where applicable |
| Company | Company tax return 2026 (NAT 0656) |
| Partnership | Partnership tax return 2026 (NAT 0659) |
| Trust | Trust tax return 2026 (NAT 0660) |
Sole traders
Report business income and allowable expenses in the individual return, and complete the BPI schedule where it applies. Use the ATO's 2026 BPI instructions for each label.
Companies
The company return covers taxable income or loss, offsets and credits, PAYG instalments, and tax payable or refundable. Confirm the 2025–26 form and schedules in the ATO's company instructions.
Partnerships and trusts
A partnership or trust return is not the same as each owner's or beneficiary's personal return. Partnership losses are allocated to partners proportionately. Trust losses stay in the trust and carry forward under trust-loss rules.
From the 2026 income year, anyone who received trust distributions must also complete the Trust income schedule, detailing each distribution.
Special circumstances
Some entities need extra schedules:
- International dealings schedule 2026: attach with a company, trust or partnership return when labels show amounts or trigger questions are yes. Use the 2026 instructions, not old thresholds.
- Losses schedule 2026 and Consolidated groups losses schedule 2026: attach when the instructions require them.
- Substituted accounting periods: these change the due date, not the core return form.
2026 Lodgment Dates, Extensions and Payment Obligations
The income year ends 30 June 2026, but the return is lodged in the 2026–27 year. Dates below apply to 30 June balancers and vary with prior-year lodgment status and tax agent program eligibility. Confirm yours on the ATO due-date pages.
Date checklist for 30 June balancers
- Sole traders (self-lodged): 31 October 2026.
- Partnerships (self-lodged): 31 October 2026.
- Trusts: 31 October 2026 (ATO general due date).
- Small companies: generally 28 February 2027; 31 October 2026 if prior-year returns are outstanding.
Under the registered-agent program, dates can differ:
- Prior returns outstanding at 30 June 2026: 31 October 2026.
- Large or medium taxable companies and trusts (over $10 million total income): 31 January 2027.
- Large or medium non-taxable and new-registrant clients: 28 February 2027.
- Individuals and trusts with a latest tax liability of $20,000 or more: 31 March 2027.
- Remaining eligible individuals, partnerships and trusts: generally 15 May 2027, with a 5 June concession if payment is also made by then.
Registered-agent clients should confirm their date with their agent.
What changes the standard date
- Substituted accounting period: for companies, lodgment is the 15th day of the seventh month after period close, and payment is the first day of the sixth month.
- Outstanding returns: move you to the earlier 31 October 2026 date.
- Deferrals: request by the due date. Late requests are considered only with detailed reasons.
Extensions do not defer payment
A lodgment deferral does not defer payment. Unpaid tax can attract GIC, which compounds daily even on a payment plan. If you're in financial difficulty, ask the ATO about a payment plan.
Keep a separate compliance calendar
BAS, GST, PAYG instalments, PAYG withholding, FBT and payroll reporting run on their own cycles. Track them apart from the income tax return.
How to Prepare and Lodge the 2026 Business Tax Return
- Confirm entity, year and obligations. Check the ABN, legal name, entity type, residency or foreign-company status, accounting period and last year's return.
- Assemble and reconcile records. Gather income reports, invoices, bank statements, payroll records, asset registers, loan details, BAS and PAYG data, prior-year losses and any related-party or international transaction documents.
- Calculate taxable income. Reconcile accounting profit to taxable income. Review deductible expenses, private costs, capital assets, depreciation, bad debts, trading stock and losses.
- Complete the return and schedules. Make sure income, deductions, offsets, instalments, distributions and ownership details agree with your records. Follow the ATO's instructions for each label.
- Lodge, pay and keep evidence. Business income tax returns cannot be lodged in Online services for business. Use SBR-enabled software, or engage a registered tax agent. Arrange payment or a plan, and keep your records.
Calculation points worth checking
- Instant asset write-off: for 2025–26, the threshold is $20,000 per asset for eligible businesses. The full cost must be under the threshold and the claim is reduced for private use.
- Trading stock: eligible small businesses may skip a formal stocktake if the estimated value change is $5,000 or less.
- Bad debts: the decision to write off must be recorded in writing before year end.
Where VJM Global fits
VJM Global provides outsourced accounting, bookkeeping and complete year-end financial reports used to prepare and finalise corporate tax returns for Australian businesses. That gives your tax preparer reconciled numbers to work from.
Records, Deductions and Common Errors to Check Before Lodgment
Final review checklist
- Bank accounts reconciled
- No missing invoices or duplicated expenses
- GST treated correctly
- Director and owner transactions reviewed
- Payroll figures consistent with STP and PAYG records
- Asset purchases classified correctly
- Prior-year losses carried forward
- Balance-sheet items explained
The ATO's 2026 small-business toolkit identifies omitted income and incorrect expense claims as common mistakes. Cash sales and contractor income are frequently missed.
Deductions and evidence
Most expenses are deductible only if directly related to earning assessable income. Private portions are not deductible, and mixed-use expenses must be apportioned. Capital assets are generally not immediately deductible.
Keep records generally for five years, and longer where needed to cover the period of review. They must support every amount in the return.
Private company money and Division 7A
The ATO calls Division 7A a significant source of errors. Common failures:
- No written complying loan agreement before lodgment day
- Interest below the benchmark rate
- Journal-only repayments
- Missed minimum yearly repayments
In the ATO's example, $20,000 of school fees and a $15,000 family holiday were paid on a company card. They were treated as Division 7A dividends because they were not repaid or put on complying loans before lodgment day.
Correcting a lodged return
Compare the proposed change with the original before requesting an amendment. Per the ATO, businesses with turnover below $50 million have up to four years from assessment to request one for 2024–25 and later years, including 2025–26. Confirm the amendment period that applies to your entity and issue type.
Frequently Asked Questions
How do I file a business income tax return for 2026?
Identify your entity's ATO form, reconcile your records, complete the required schedules, and lodge through SBR-enabled software or a registered tax agent.
Do I need to file a 2026 business tax return?
It depends on your entity, activity and ATO rules. Sole traders who carried on a business must lodge even with no income. BAS and other reports do not replace the annual return.
What is the ATO amendment period for companies?
For businesses with turnover under $50 million, the ATO allows up to four years from assessment for 2025–26. Confirm the current period in ATO guidance before relying on it.
What happens if I miss my lodgment date?
The ATO may apply a failure-to-lodge penalty, plus GIC on unpaid tax. It generally warns first and doesn't penalise isolated late cases. Lodge promptly and contact the ATO.
Can I lodge my 2026 business tax return without a tax agent?
Yes, the ATO describes self-lodged company and partnership returns, using SBR-enabled software. Complex structures, international dealings, amendments or unresolved records often justify professional help.
