TL;DR: Key Takeaways
- The ATO generally expects the oldest outstanding year to be lodged first, and deviating from this without a clear rationale can complicate your position.
- ATO voluntary disclosure, approached proactively and in the right sequence, may support penalty reduction consideration in many cases.
- Non-resident and expat returns require additional sequencing considerations: tax residency status, CGT cost base, and foreign income offsets all carry forward year-on-year.
- Years with large refunds or complex residency changes need careful placement in the lodgment sequence to avoid offset or amendment complications.
- Professional sequencing by a specialist Registered Australian Tax Agent is not a luxury for expats with multiple overdue years. It is a risk management decision.
Why Does Lodgment Order Actually Matter for Late Tax Returns in Australia?
Most people assume lodging a late tax return is simply a matter of completing the paperwork and submitting it. The order you choose, however, has direct consequences for your penalty position, your refund flow, and how the ATO reads your overall compliance history.
- Penalties accumulate per year: Failure-to-lodge (FTL) penalties accrue separately for each overdue year. How you present your lodgment history to the ATO can affect whether they apply, reduce, or waive those penalties.
- Prior-year figures carry forward: Net capital losses, carried-forward tax losses, and prior-year HELP indexation all feed into the next year’s return. Lodge out of order and these figures may be incorrectly stated, requiring costly amendments.
- Residency status can change across years: For expats, a year in which you departed Australia may be assessed differently from a full non-resident year. Lodge the departure year out of sequence and you may misstate your residency position for all subsequent years.
- The ATO notices sequencing: When multiple returns arrive together, ATO systems flag the pattern. A logical oldest-to-newest sequence accompanied by a voluntary disclosure reads very differently from a random or refund-first order.
What Is the ATO’s Default Expectation for Multiple Overdue Returns?
Building on the sequencing logic above, it helps to understand what the ATO’s own framework expects before you deviate from it for strategic reasons.
The ATO’s general position is that outstanding returns should be lodged in chronological order, starting with the earliest year. This reflects the principle that each year’s tax assessment must be settled before subsequent years can be accurately calculated. In practice, this means:
| ATO Default Expectation | Why It Exists | Expat Complication |
|---|---|---|
| Oldest year lodged first | Establishes correct opening figures for subsequent years | Departure year may require residency determination first |
| Continuous sequence, no gaps | Prevents artificial loss harvesting or income deferral | Foreign income reporting obligations differ by residency status each year |
| Voluntary disclosure before ATO contact | Demonstrates good faith, supports penalty reduction consideration | Expats often unaware they had an obligation to lodge |
Departing from the oldest-first default is sometimes justified, but it requires a documented rationale and is best managed by a Registered Australian Tax Agent who understands how ATO case officers interpret lodgment patterns.
How Does ATO Voluntary Disclosure Fit Into the Sequencing Strategy?
A related but distinct question from sequencing is when and how to approach the ATO before or during lodgment. ATO voluntary disclosure is the process by which a taxpayer proactively informs the ATO of overdue obligations before the ATO initiates contact or audit activity.
Voluntary disclosure does not guarantee any specific outcome, but the ATO’s published guidance consistently treats self-initiated corrections more favourably than those prompted by ATO action. For expats with a late tax return Australia obligation spanning several years, a well-structured voluntary disclosure approach typically involves:
- Engaging a Registered Australian Tax Agent to review all outstanding years before any returns are lodged.
- Preparing a lodgment plan in chronological sequence that can be presented to the ATO as a complete resolution, not a piecemeal drip.
- Accompanying the lodgment sequence with a cover letter to the ATO outlining the reason for late lodgment, the taxpayer’s circumstances (including overseas residence), and the proactive intent to resolve all years.
- Requesting remission of failure-to-lodge penalties based on the taxpayer’s circumstances and voluntary nature of the disclosure.
Penalty remission outcomes vary based on individual circumstances, and ODIN Tax does not promise specific outcomes. What the voluntary disclosure framework does provide is a structured path to resolution that may be viewed more favourably than waiting for the ATO to contact you first.
Are There Cases Where Expats Should Deviate From Oldest-First Sequencing?
Stepping back from the general rule, there are legitimate scenarios where a strict oldest-first sequence may not be in the taxpayer’s best interest, and a specialist agent may recommend a modified approach.
Scenario 1: The Departure Year Is the Most Complex
If the first overdue year is the year you left Australia, it likely involves a part-year residency calculation, a CGT “deemed disposal” assessment for certain assets, and a change in how foreign income is taxed. Getting this year’s residency determination right is foundational. Every subsequent non-resident tax return depends on it. In this case, the oldest-first rule still applies, but the departure year must be handled with significantly more care than a standard non-resident year.
Scenario 2: A Refund Year Early in the Sequence
If an early year contains a substantial refund entitlement, lodging it quickly reduces the effective net liability across the full sequence. This does not mean skipping years, but it reinforces the case for moving through the sequence promptly rather than selectively lodging only recent years.
Scenario 3: A Year With a Property Sale
Non-residents who sold Australian property are generally not entitled to the full 50% CGT discount available to residents for assets acquired after 8 May 2012, though an apportioned discount may apply where the taxpayer was an Australian resident for part of the ownership period, or in relation to capital gains accrued prior to that date. If a CGT year sits in the middle of the sequence, the cost base from prior years must be correctly established before that return can be accurately prepared. This is another reason why prior years cannot simply be skipped or estimated.
What Practical Steps Should You Take Right Now?
The following outlines practical steps for Australian expats with multiple overdue returns. This is general information only; your specific circumstances should be reviewed by a Registered Australian Tax Agent.
- Identify every outstanding year: Cross-reference your myGov account and any prior lodgment confirmations to establish which years are genuinely overdue.
- Gather source documents by year: Payment summaries, bank interest statements, rental income summaries, foreign income records, and foreign tax paid records should be organised per financial year before any lodgment begins.
- Determine your residency status for each year: This is not a self-assessment exercise for expats. Tax residency under the ATO’s Resides Test, Domicile Test, 183-Day Test, and Commonwealth Superannuation Test requires specialist interpretation, and errors here flow through every subsequent year.
- Engage a specialist Registered Australian Tax Agent early: Sequencing, voluntary disclosure framing, and penalty remission requests require specialist guidance when multiple years are in play.
- Lodge in sequence with a voluntary disclosure cover letter: Present the full resolution to the ATO as a single coherent package where possible.
- Follow up on penalty remission requests separately: Penalty remission decisions often come after the lodgment is processed. Your tax agent should track and follow up on these separately.
Frequently Asked Questions
How many years of late tax returns can the ATO go back?The ATO can generally review returns within a standard two-year amendment period for most individuals, but for cases involving fraud, evasion, or failure to lodge, there is no statutory time limit on how far back they can pursue outstanding returns. Proactive voluntary disclosure is always preferable to waiting.
Will I definitely be penalised for lodging late tax returns?Failure-to-lodge penalties may apply, but they are not automatic in every case. The ATO has discretion to remit penalties, particularly where the taxpayer demonstrates good faith through voluntary disclosure and provides a reasonable explanation for late lodgment. No outcome can be guaranteed. This is general information, not personal tax advice.
Do I need to lodge a non-resident tax return for every year I was overseas?Your obligation to lodge depends on whether you had Australian-sourced income (rental income, Australian employment income, interest, dividends) or other taxable events in each year. Confirmation of your lodgment obligation for each year should be obtained from a Registered Australian Tax Agent, not assumed.
Can I lodge my overdue returns myself through myTax?MyTax is designed for straightforward resident returns. Non-resident and expat returns involving residency changes, foreign income, CGT, HELP debt, and multiple overdue years present complexities that myTax does not accommodate well. Self-lodgment errors in these circumstances may be costly to correct compared to engaging a specialist from the outset.
What is the ATO voluntary disclosure process for overdue returns?ATO voluntary disclosure for overdue lodgments typically involves your registered tax agent contacting the ATO before lodgment, outlining the circumstances, and presenting a structured plan to lodge all outstanding years. This is accompanied by a formal request for penalty remission. The ATO does not have a single prescribed form for this; the approach is managed through the tax agent’s ATO portal access and written correspondence.
How long does it take to resolve multiple years of overdue returns?The timeline depends on how many years are outstanding, the complexity of each year (residency changes, property sales, foreign income), and how quickly source documents can be gathered. Processing times at the ATO’s end for older-year returns can also be longer than standard current-year lodgments.
Is there a deadline I need to be aware of for the 2025-26 financial year?The standard lodgment deadline for Australian tax returns for the 2024-25 financial year is 31 October 2025, with extensions typically available to clients of registered tax agents. If you are also catching up on prior years while managing your current year obligation, your tax agent can often negotiate extended deadlines through the ATO’s lodgment program.
About ODIN Tax
ODIN Tax is Australia’s specialist tax agent practice for Australian expats and non-residents, and part of the broader ODIN Group alongside ODIN Mortgage. Led by Tax Director Pau Lam with over 10 years of specialist expat tax experience, ODIN Tax has served more than 10,000 Australian expats across 40+ countries and holds a 4.9 out of 5 star Google rating from over 330 verified client reviews. For expats navigating overdue lodgments, the practice brings deep pattern recognition across every major expat corridor, combined with a structured approach to ATO voluntary disclosure and penalty management that generalist accountants rarely develop. As a Registered Australian Tax Agent integrated within a team that also handles mortgage broking for expat property buyers, ODIN Tax connects tax strategy directly to property structuring and long-term financial planning for Australians living overseas.
Have multiple overdue Australian tax returns? Don’t guess at the order.
ODIN Tax specialises in resolving complex overdue lodgment situations for Australian expats and non-residents. Get a clear sequencing strategy and understand your penalty position before you lodge a single return.
Disclaimer: This article contains general information only and does not constitute personal tax advice. Tax obligations vary depending on individual circumstances, residency status, income type, and the relevant financial year. Readers should seek advice from a Registered Australian Tax Agent before making decisions about overdue lodgments or voluntary disclosure. ODIN Tax is a Registered Australian Tax Agent.
