ATO & Tax Lawyers › ATO Objections & Appeals
ATO Objection & Appeal Lawyers — Challenge the Decision. Pursue Every Avenue.
The Part IVC objection and appeal process is the formal mechanism for challenging ATO assessments and decisions in Australia. A compelling objection — raising all available grounds, supported by strong evidence and legal submissions — is the foundation of every successful tax dispute. A tax lawyer prepares your objection, manages the review process, and pursues the matter to the AAT or Federal Court if needed.
⚠ ATO objections must generally be lodged within 60 days of the assessment or decision. If an objection is disallowed, you have 60 days to elect AAT review or Federal Court appeal. Grounds not raised in the objection generally cannot be raised later. Get advice before the deadline.
Objection & Appeal Matters We Handle
Every step of the Part IVC process — from objection to High Court.
Formal Objection Preparation
A formal objection under Part IVC must state the grounds in full — grounds not raised in the objection generally cannot be raised in subsequent AAT or Federal Court proceedings. A lawyer identifies every available ground of objection, prepares detailed legal and factual submissions for each, and ensures the objection is lodged within the required timeframe.
Extension of Time Applications
Where the 60-day objection period has passed, a taxpayer can apply to the Commissioner for an extension of time to lodge the objection. The ATO has a discretion to grant an extension — but it is not automatic, and the ATO may refuse if there is no reasonable explanation for the delay. A lawyer prepares a compelling extension application that maximises the prospect of the extension being granted.
Objection Decision Review
Where the ATO disallows an objection, a lawyer reviews the objection decision in detail, identifies whether the ATO has correctly applied the law and the facts, and advises on the prospects of success in the AAT or Federal Court. Not every disallowed objection should be pursued to the AAT — a lawyer provides an honest assessment of the merits before recommending further action.
Administrative Appeals Tribunal (AAT)
AAT tax proceedings involve a merits review of the ATO decision — the Tribunal stands in the shoes of the decision maker and decides the matter afresh, with the taxpayer bearing the burden of proving the assessment is excessive. A lawyer prepares the statement of facts, issues, and contentions; manages the evidence; and presents the case at the AAT hearing.
Federal Court Appeal
A Federal Court appeal under Part IVC is a full hearing of the tax dispute — not a review of the AAT's decision. The Federal Court is the appropriate forum for complex legal questions, where the amount in dispute is significant, or where the AAT has decided against the taxpayer. A tax litigation lawyer prepares and presents Federal Court proceedings.
Alternative Dispute Resolution
The ATO's objection process includes an internal alternative dispute resolution (ADR) mechanism — including facilitated conferences and independent review — that can resolve disputes without formal AAT or Federal Court proceedings. A lawyer identifies whether ADR is appropriate, prepares for the ADR process, and negotiates outcomes that are favourable to the taxpayer.
The Legal Framework
The Part IVC objection and appeal process explained.
Part IVC TAA 1953 — the objection framework
Part IVC of the Tax Administration Act 1953 sets out the formal process for objecting to ATO assessments and decisions. A taxpayer who is dissatisfied with an assessment, private binding ruling, or other reviewable ATO decision lodges a written objection with the Commissioner. The Commissioner then makes a decision on the objection — either allowing it (in whole or in part) or disallowing it. If the objection is disallowed, the taxpayer can elect to have the matter reviewed by the AAT or to appeal to the Federal Court.
s14ZZO TAA 1953 — the taxpayer bears the burden of proof
In both AAT and Federal Court tax proceedings, the burden of proof lies with the taxpayer — under s14ZZO of the TAA 1953, the taxpayer must prove that the assessment is excessive or that the decision is incorrect. This is different from general civil litigation, where the burden is on the party making the positive assertion. The practical effect is that the taxpayer must lead affirmative evidence that the assessment is wrong — not merely that the ATO has not proved it is right. Understanding and managing the burden of proof is a critical aspect of tax litigation strategy.
Grounds of objection — why completeness matters
The grounds raised in the formal objection are the foundation of the entire dispute. Under s14ZZL of the TAA 1953, in AAT proceedings the taxpayer is limited to the grounds stated in the objection — new grounds generally cannot be raised at the AAT stage. Similarly, in Federal Court proceedings, the taxpayer is limited to the grounds stated in the objection or raised in the AAT (with leave). This means the objection must identify every possible ground — both legal and factual — from the outset. Omitting a ground at the objection stage can permanently foreclose a meritorious argument.
Private binding rulings — binding on the Commissioner
A private binding ruling (PBR) issued by the ATO is binding on the Commissioner — if the taxpayer acts in accordance with the ruling, the ATO cannot assess additional tax on the basis that the ruling was wrong. However, PBRs are subject to conditions (the facts must match what was presented to the ATO) and can be challenged if the ATO refuses to issue a ruling or issues a ruling that is unfavourable. A lawyer advises on whether a PBR application is appropriate and, if an unfavourable ruling is issued, whether it should be challenged through the objection process.
Costs in tax litigation — each party bears its own
In the AAT, each party generally bears its own costs — the AAT does not ordinarily make costs orders. In the Federal Court, costs follow the event — so a taxpayer who succeeds in an appeal will generally recover their legal costs from the ATO, and a taxpayer who fails will be ordered to pay the ATO's costs. This creates an asymmetric risk in Federal Court tax litigation — a lawyer advises on the costs implications of the chosen pathway and the prospects of a favourable costs order.
Settlement — the ATO's model litigant obligations
The ATO, as a model litigant under the Legal Services Directions 2017, must consider settlement in appropriate cases. In practice, the ATO settles a significant proportion of tax disputes — particularly where the legal question is close, the amount is not large enough to warrant full litigation, or where the ATO's position has weaknesses. A lawyer who understands the model litigant obligations and the ATO's internal settlement process can identify when settlement is achievable and negotiate favourable terms — avoiding the cost and uncertainty of a hearing.
How It Works
One request. A free objection & appeal consultation.
Tell us the ATO decision you want to challenge, the grounds you believe are available, and any deadlines that apply. A tax lawyer will assess the merits and advise on the best pathway.
Submit Your RequestDescribe the ATO decision
Tell us the type of ATO decision (assessment, amended assessment, private ruling, or other decision), the amount in dispute, when the decision was made, and any deadlines that apply.
Matched to a tax dispute lawyer
Your request is matched to a tax lawyer experienced in Part IVC objections, AAT proceedings, and Federal Court tax appeals — who can advise on the merits and the most cost-effective pathway.
Free consultation
A tax lawyer contacts you for a free consultation — reviewing the ATO decision, identifying all available grounds of challenge, and providing a clear strategy and cost estimate for the dispute.