Voluntary disclosure to the ATO can dramatically reduce penalties for undeclared income or unreported assets. Here is what it means and why timing is everything.
Do you have undeclared income, an unreported overseas asset, or a mistake in an old tax return that you have been meaning to fix? If so, an ATO voluntary disclosure may be the most important step you can take.
A voluntary disclosure means telling the ATO about a tax error or omission before it finds the problem itself. Done properly and at the right time, it can be the difference between heavy penalties and little or none. This article explains what a voluntary disclosure is, when it applies, and why timing matters so much.
A voluntary disclosure is a formal process. You report a tax error, omission or non-compliance to the ATO before it identifies the same issue through its own audit or compliance work.
Common examples include:
The ATO actively encourages voluntary disclosure. Put simply, it would rather resolve matters cooperatively than through long enforcement action.
Under the tax law, ATO penalties for a tax shortfall are a percentage of the shortfall. The base penalty ranges from 25% for a failure to take reasonable care to 75% for intentional disregard of the law (ATO: penalties for false or misleading statements).
If you make a voluntary disclosure before the day the ATO tells you it will examine your affairs, the ATO generally reduces the base penalty by 80%. For a shortfall under $1,000, it may reduce the penalty to nil. After that notice, the reduction is usually 20%, and only where your disclosure saves the ATO significant time or resources (ATO: liability and penalties for voluntary corrections). The ATO can also remit penalties further at its discretion.
The practical effect is significant. For example, a taxpayer with a $100,000 shortfall who discloses in time may face penalties of $5,000 or less. By contrast, the same taxpayer who waits for the ATO to find the issue may face penalties of $50,000 or more. On top of that, general interest charge keeps accruing in the meantime.
The key question is whether the ATO has already told you it will examine your affairs. Once it has, the 80% reduction for a pre-notification disclosure is generally no longer available.
This is why many taxpayers end up in a difficult position. They may have meant to deal with an issue for months or years, only to find that the ATO has already spotted it. The ATO’s data-matching systems, AUSTRAC reports and information from overseas tax authorities all feed into its compliance work.
In fact, the ATO has access to a large and growing range of third-party data. This includes information from foreign tax authorities under the Common Reporting Standard (CRS) and automatic exchange of information agreements. If you have overseas income or assets, the ATO may already know about them.
A voluntary disclosure is not simply a phone call to admit an error. How you frame it, what you include and the context you give can all affect the outcome. That includes the level of penalties and the scope of any later review.
In particular, a poorly framed disclosure can open up extra years, other taxes or new compliance concerns. As a result, what starts as a targeted disclosure can turn into a much wider investigation.
For this reason, we recommend making a voluntary disclosure through a qualified tax adviser or tax lawyer. They can present the disclosure completely and in the best light, and then negotiate the penalty position with the ATO. For complex offshore matters, our complex tax advice team can help.
In one matter, a client with bank accounts and a business structure in Hong Kong had not declared income earned there over several years. The client came to us before the ATO had started any audit. We then prepared and lodged a full voluntary disclosure on their behalf.
Because the disclosure was proactive and complete, the ATO accepted it and imposed no penalties. The client paid the outstanding tax with general interest charge, but avoided the significant penalty exposure entirely.
This outcome would not have been possible if the client had waited for the ATO to find the issue.
If you are also behind on returns, our overdue tax returns and compliance team can bring them up to date alongside the disclosure. Where penalties have already been imposed, see ATO penalty remission.
If you know about an error or omission in your tax affairs, however old or small, the question is not whether to deal with it, but how and when. Leaving it does not make it go away. Instead, general interest charge keeps building and your options shrink. What’s more, GIC is no longer tax deductible from 1 July 2025, so waiting now costs more (ATO: denying deductions for ATO interest charges).
Contact Australian Tax Experts for a confidential discussion. We will assess your circumstances, advise you on the best approach and manage the whole disclosure process for you.
Related guides: Tax scandals from “Panama Papers”.
A confidential, no obligation first consultation. Early advice is the single most important step you can take.
Specialist tax lawyers and accountants, focused only on resolving matters with the ATO.
All Rights Reserved © 2026 - Australian Tax Experts
