ATO Objections & Appeals in Australia (2026)

Researched by Ahmed R. J. Alsaedi, Founder & Head Researcher

Primary sources cited; not legal advice.

Source: Taxation Administration Act 1953, Part IVC; Administrative Review Tribunal Act 2024

About this article

Sourced from Commonwealth Acts of Parliament, federal regulations, and official government guidance. State-level information reflects each state's own Acts and court decisions. Written in plain language for general understanding — this is educational content, not legal advice. Our editorial standards

Quick answer

If you disagree with an ATO decision, you have a right to object — you must do so in writing within the time limit.
Time limit for income tax assessments: generally 4 years from the date of the notice of assessment (2 years for some simple individual matters); for other ATO decisions, the limit is often 60 days from when you receive it.
If your objection is fully or partly unsuccessful, you can apply to the Administrative Review Tribunal (the ART, which replaced the AAT in October 2024) for an independent merits review, or appeal directly to the Federal Court on a question of law.
Extension applications are possible if you miss the deadline, but they're not automatic — explain why fully.
Find your state below for the local revenue office (state taxes have their own objection processes).

Compare by state

Statute citations are verified per state. Select a state to jump to its full section below.

ATO objections & appeals (federal) plus each state/territory's revenue statute.
	Primary statute
New South Wales	Taxation Administration Act 1996 (NSW)
Queensland	Taxation Administration Act 1953 (Cth), Part IVC — objections and appeals
South Australia	Taxation Administration Act 1953 (Cth), Part IVC — objections
Tasmania	Taxation Administration Act 1953 (Cth), Part IVC — objections and appeals
Victoria	Taxation Administration Act 1997 (Vic)
Western Australia	Taxation Administration Act 1953 (Cth), Part IVC — objections

Australian Federal Law

What is this right?

If you disagree with an ATO decision — an amended assessment, a penalty, a private ruling — the formal route is an objection under Part IVC of the Taxation Administration Act 1953.

The window: lodge within 60 days of receiving the notice. For some private rulings and certain other decisions, the period stretches to 4 years. The objection must be in writing, explain why the decision is wrong, and attach the evidence.

An independent officer who wasn't part of the original decision reviews your objection and issues a written objection decision. That separation of personnel is the procedural safeguard.

Unhappy with the objection decision? You can apply for external review by the Administrative Review Tribunal (ART) — successor to the AAT — or appeal to the Federal Court of Australia. You usually have 60 days from the objection decision date. The ART is cheaper, less formal, and built for self-represented taxpayers; the Federal Court is the route when you need binding precedent.

When does it apply?

This applies whenever the ATO makes a decision that affects your tax position and you disagree with it.

This includes amended assessments, penalties, interest charges, private rulings, and GST decisions.
You must act within 60 days of receiving the ATO's notice.
Late objections may be accepted if you can show exceptional circumstances.

What to Do If You Disagree with an ATO Tax Decision in Australia

Lodge your objection within 60 days — do not miss this deadline.
Put your objection in writing using the ATO's approved form or a detailed letter.
State clearly why you disagree and attach supporting documents, receipts, or legal arguments.
Consider getting help from a registered tax agent or tax lawyer, especially for complex matters.
If your objection is rejected, decide whether to apply to the AAT (lower cost) or the Federal Court (binding precedent).
Request a payment deferral while your objection is being considered, so you are not forced to pay the disputed amount.

What should you NOT do?

Don't let the 60-day deadline pass — late objections are only accepted in rare cases.
Don't assume phoning the ATO is an objection — it must be lodged in writing.
Don't stop paying undisputed amounts — interest continues to accrue on any outstanding balance.
Don't rely on the same arguments without new evidence if your first objection was rejected.
Don't ignore an objection decision — if you miss the 60-day window for external review, you lose that right.

About Tax Rights in Australia

The tax year runs 1 July to 30 June and most individuals lodge by 31 October. Income tax is set by the Income Tax Assessment Acts 1997 and 1936; GST (10%) sits under the A New Tax System (GST) Act 1999. If you disagree with an ATO assessment, you have 60 days to lodge an objection under Part IVC of the Taxation Administration Act 1953. Appeals go to the Administrative Review Tribunal (replaced AAT October 2024) or the Federal Court. The Inspector-General of Taxation handles complaints about ATO conduct.

State Law

Choose your state

Australia National New South Wales Victoria Queensland Western Australia South Australia Tasmania

Worked Examples

ScenarioYou disagree with the ATO's denial of a deduction in your individual notice of assessment, dated 3 months ago.
OutcomeYou're well within the time limit to object (generally 4 years from the assessment, with a minimum 60 days for many decisions). Lodge a written objection setting out the grounds in detail with supporting evidence. If you're unsuccessful, you can apply to the Administrative Review Tribunal for review, or appeal to the Federal Court on a question of law.
Verified against the ATO: objection time limits and the ART (which replaced the AAT in October 2024). Educational information, not tax or legal advice — deadlines are critical.

Common Questions

How long do I have to object to an ATO decision?

For individual income tax assessments, generally 4 years from the date on your notice (2 years for some simple individual matters). For other types of ATO decisions — like rulings or penalty decisions — the limit is often 60 days from when you receive it. Always check the decision letter for the specific time limit.

How do I lodge an objection?

In writing — through your myGov-linked ATO Online services, by mail, or via your tax agent. Set out the grounds in detail with supporting documents. The more specific and well-evidenced your objection, the better the ATO can assess it. Get advice for complex matters.

What if my objection is unsuccessful?

You can apply to the Administrative Review Tribunal (ART, which replaced the AAT in October 2024) for an independent merits review of the objection decision, generally within 60 days. Alternatively, you can appeal to the Federal Court on a question of law, also generally within 60 days.

What if I missed the deadline to object?

You can ask the ATO for an extension of time. Explain in detail why you couldn't lodge in time — for example, hospitalisation, getting documents from overseas, or having only just discovered the issue. The ATO has discretion, so make a compelling case with supporting evidence.

What is the objections and appeals right in Australia?

If you disagree with an ATO decision — an amended assessment, a penalty, a private ruling — the formal route is an objection under Part IVC of the Taxation Administration Act 1953.The window: lodge within 60 days of receiving the notice. For some private rulings and certain other decisions, the period stretches to 4 years. The objection must be in writing, explain why the decision is wrong, and attach the evidence.An independent officer who wasn't part of the original decision reviews your objection and issues a written objection decision. That separation of personnel is the procedural...

When does objections and appeals apply?

This applies whenever the ATO makes a decision that affects your tax position and you disagree with it.This includes amended assessments, penalties, interest charges, private rulings, and GST decisions.You must act within 60 days of receiving the ATO's notice.Late objections may be accepted if you can show exceptional circumstances.

What should I do if I disagree with an ATO assessment or penalty decision in Australia?

Lodge your objection within 60 days — do not miss this deadline.Put your objection in writing using the ATO's approved form or a detailed letter.State clearly why you disagree and attach supporting documents, receipts, or legal arguments.Consider getting help from a registered tax agent or tax lawyer, especially for complex matters.If your objection is rejected, decide whether to apply to the AAT (lower cost) or the Federal Court (binding precedent).Request a payment deferral while your objection is being considered, so you are not forced to pay the disputed amount.

What mistakes should I avoid with objections and appeals?

Don't let the 60-day deadline pass — late objections are only accepted in rare cases.Don't assume phoning the ATO is an objection — it must be lodged in writing.Don't stop paying undisputed amounts — interest continues to accrue on any outstanding balance.Don't rely on the same arguments without new evidence if your first objection was rejected.Don't ignore an objection decision — if you miss the 60-day window for external review, you lose that right.

State-by-state details

New South Wales

Primary statute: Taxation Administration Act 1996 (NSW)

For federal taxes, the ATO objection and appeal pathway is consistent across Australia. For NSW state taxes, objections are made to the Chief Commissioner of State Revenue and appeals lie to NCAT or the NSW Supreme Court.

Objections to Revenue NSW assessments (payroll tax, land tax, stamp duty) must be lodged in writing with the Chief Commissioner of State Revenue within 60 days of the assessment notice (Taxation Administration Act 1996 (NSW), s 86).
If your objection is disallowed, you can appeal to the NSW Civil and Administrative Tribunal (NCAT) Administrative and Equal Opportunity Division, or directly to the NSW Supreme Court (s 96).
NCAT provides a less formal and less costly forum than the Supreme Court for tax disputes. Legal representation is permitted but not required.
For federal tax disputes, the pathway is: internal review by the ATO, then objection, then appeal to the Administrative Review Tribunal (ART) or the Federal Court. This is the same in NSW as in all other states.

Queensland

Primary statute: Taxation Administration Act 1953 (Cth), Part IVC — objections and appeals

Objections to federal tax assessments follow the standard ATO process. For Queensland state taxes, objections are handled by the Queensland Revenue Office (QRO) with appeals to QCAT or the courts.

For Queensland state taxes, a taxpayer who disagrees with an assessment can lodge an objection with the Commissioner of State Revenue within 60 days of receiving the assessment, under the Taxation Administration Act 2001 (Qld).
If the objection is disallowed, the taxpayer can appeal to QCAT (for most state tax disputes) or the Supreme Court of Queensland.
For federal tax, the standard process applies: lodge an objection with the ATO within the prescribed time, and if disallowed, appeal to the Administrative Review Tribunal (ART) or the Federal Court.
The QRO offers an early engagement process where taxpayers can discuss concerns before a formal assessment is issued, which can resolve disputes more quickly.

South Australia

Primary statute: Taxation Administration Act 1953 (Cth), Part IVC — objections

Taxpayers in SA can object to ATO assessments and RevenueSA assessments through separate processes. Federal tax objections follow Commonwealth law; state tax objections follow SA law.

For federal tax (income tax, GST, super guarantee), objections must be lodged with the ATO within the time limits set by the Taxation Administration Act 1953 — generally 2 years for individuals with simple affairs or 4 years for others.
If the ATO disallows an objection, the taxpayer can appeal to the Administrative Review Tribunal (ART) or the Federal Court of Australia.
For SA state taxes (land tax, stamp duty, payroll tax), objections are lodged with RevenueSA under the Taxation Administration Act 1996 (SA). If the objection is disallowed, the taxpayer can appeal to the SA Supreme Court.
The SA Civil and Administrative Tribunal (SACAT) has jurisdiction over some state tax-related matters, depending on the specific legislation.

Tasmania

Primary statute: Taxation Administration Act 1953 (Cth), Part IVC — objections and appeals

Taxpayers in Tasmania can object to ATO assessments and State Revenue Office assessments through separate processes. Federal tax objections follow Commonwealth law; state tax objections follow Tasmanian law.

For federal tax (income tax, GST, super guarantee), objections must be lodged with the ATO within the time limits set by the Taxation Administration Act 1953 — generally 2 years for individuals with simple affairs or 4 years for others.
If the ATO disallows an objection, the taxpayer can appeal to the Administrative Review Tribunal (ART) or the Federal Court of Australia.
For Tasmanian state taxes (land tax, duty, payroll tax), objections are lodged with the State Revenue Office of Tasmania under the relevant Act. If the objection is disallowed, the taxpayer can appeal to the Magistrates Court or Supreme Court of Tasmania depending on the amount in dispute.
Tasmania does not have a civil and administrative tribunal equivalent to VCAT or NCAT — tax appeal matters are heard by the courts.

Victoria

Primary statute: Taxation Administration Act 1997 (Vic)

For Victorian state taxes, the objection and appeal pathway goes through the State Revenue Office and then to VCAT or the Victorian Supreme Court.

Objections to SRO assessments must be lodged in writing with the Commissioner of State Revenue within 60 days of the assessment (Taxation Administration Act 1997 (Vic), Part 10).
If the objection is disallowed, the taxpayer can appeal to VCAT (Civil Division) or the Supreme Court of Victoria.
VCAT provides a less formal and lower-cost alternative to the Supreme Court. Hearing fees are modest, and legal representation is permitted but not required.
For federal tax disputes, the standard ATO objection pathway applies — internal review, objection, then appeal to the Administrative Review Tribunal or the Federal Court.

Western Australia