Voluntary Disclosures: Correcting Omitted Income Before the ATO Contacts You

A taxpayer who identifies omitted income, an overstated deduction or another false or misleading statement should consider correcting it promptly. Depending on the circumstances, that may involve an amendment together with a formal voluntary disclosure.

The timing matters. A disclosure made before the ATO advises that it will examine the relevant matter can qualify for a larger statutory reduction in certain shortfall penalties than one made after notification.

What a voluntary disclosure should contain

A useful disclosure identifies the taxpayer, affected years, error, corrected figures, method of calculation, reason the error occurred and supporting records. It should be complete enough for the ATO to determine the additional liability or understand what remains to be resolved.

Partial or ambiguous disclosure can fail to achieve the intended penalty treatment. If an amount cannot yet be finalised, explain the uncertainty, provide available information and set out the proposed completion steps.

Potential penalty reductions

Current ATO guidance states that, where the statutory conditions are met, a voluntary disclosure made before notification of an examination can reduce certain shortfall penalties by 80%. A disclosure after notification can reduce them by 20% where it saves the ATO significant time or resources. Other rules may apply to small shortfalls and specific penalty categories.

These reductions do not erase the underlying tax. GIC or SIC may still apply, and remission is a separate discretionary question.

Amendment is not always the whole answer

Submitting corrected figures can change the assessment, but the ATO may still need context to determine penalties. A separate disclosure narrative is often appropriate where the omission is material, repeated or connected to overseas accounts, property, crypto assets, a business or an incorrect residency position.

Legal privilege, fraud concerns, promoter conduct or possible criminal exposure require specialist legal advice. A tax agent should not give legal advice outside scope.

Practical takeaway

Act before contact where possible, quantify the correction carefully, disclose the relevant facts without minimisation and avoid promising a penalty outcome. Early professional engagement can preserve procedural options.

Official sources and further reading

• Australian Taxation Office: Liability and penalties for voluntary corrections
• Australian Taxation Office: Time limits on tax return amendments
• Australian Taxation Office: General interest charge
• Australian Taxation Office: Shortfall interest charge

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