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Finding out you owe the Australian Taxation Office (ATO) more than you expected is stressful, but the “sting” often comes from the interest attached to that debt. When the ATO amends your tax assessment—usually following an audit or a voluntary disclosure—they apply a Shortfall Interest Charge (SIC).
While the SIC is designed to be lower than the standard General Interest Charge (GIC), it can still amount to thousands of dollars. Fortunately, the law allows the Commissioner of Taxation to remit (cancel or reduce) this charge if you can prove your circumstances warrant it. Navigating this process requires a strategic approach, as the ATO does not grant remissions simply because a taxpayer asks.
To better understand how these charges fit into the broader financial landscape, it is helpful to distinguish between Shortfall Interest Charge vs GIC: Understanding the Key Differences.
Table of Contents
- 1. Identify Valid Grounds for Remission
- 2. Gather Evidence and Build a Chronology
- 3. Use the Correct Submission Channel
- 4. Be Aware of Upcoming Legislative Changes
- 5. Address the “Unfair Advantage” Argument
- Summary of Key Takeaways
- Sources
1. Identify Valid Grounds for Remission
The ATO does not remit interest based on “good behavior” alone. You must align your request with the specific criteria outlined in ATO Practice Statement Law Administration (PS LA) 2006/8. Successful requests typically fall into one of these categories:
ATO Delay: If the ATO took an unreasonable amount of time to complete an audit or process an amendment, you should not be charged interest for their period of inactivity [1].
Circumstances Beyond Your Control: This includes natural disasters, serious illness, or the sudden death of a key person in a business [2].
Complexity and Judicial Interpretation: If the law was unclear or a court case recently overturned a previous interpretation, you may argue that you couldn’t have known your original lodgment was incorrect [1].
Unprompted Voluntary Disclosure: If you told the ATO about the error before they started an audit, you have a much higher chance of receiving a full or partial remission [3].
| Grounds for Remission | Example Scenario |
|---|---|
| ATO Delay | Unreasonable processing time during an audit or amendment. |
| Circumstances Beyond Control | Natural disasters, serious illness, or bereavement. |
| Legal Complexity | Unclear law or a court case changing tax interpretation. |
| Voluntary Disclosure | Taxpayer flags error before the ATO initiates an audit. |
No, the ATO does not remit interest based on ‘good behavior’ alone. You must provide specific grounds such as ATO-caused delays, circumstances beyond your control, or issues involving complex judicial interpretations.
Yes, making an unprompted voluntary disclosure before an audit begins significantly increases your chances of receiving a full or partial remission of the Shortfall Interest Charge.
The ATO typically considers serious illnesses, natural disasters, or the sudden death of a key business person as valid external circumstances that warrant a remission.
2. Gather Evidence and Build a Chronology
A vague request like “I didn’t know the rules” will likely be rejected. According to community discussions on Reddit’s AusFinance, successful applicants often provide a detailed “timeline of events” that shows they acted in good faith once they became aware of the shortfall.
Prepare the following:
Medical certificates if the delay was due to illness.
Correspondence logs showing when you requested information from third parties (like banks or employers) and how long they took to respond.
Technical arguments if you relied on ATO advice that was later found to be incorrect or misleading [1].
A detailed chronology demonstrates that you acted in good faith and took reasonable steps to resolve the shortfall as soon as you became aware of it, making your case more persuasive than a vague explanation.
You should include medical certificates for health-related delays, correspondence logs showing interactions with third parties, and any technical evidence if you relied on misleading ATO advice.
3. Use the Correct Submission Channel
You can request a remission by writing a letter or by objecting to the assessment. If the SIC amount is $2,500 or less, the ATO suggests the process is more streamlined, provided you have a positive compliance history [3].
When writing your request, be prescriptive. Instead of asking for “some relief,” specify that you are seeking a “100% remission of the SIC for the period of [Date] to [Date] due to [Specific Reason].”
If the Shortfall Interest Charge is $2,500 or less, the ATO offers a more streamlined process, provided you have a positive history of tax compliance.
Your request should be prescriptive and specific. Instead of asking for general relief, explicitly state that you are seeking a ‘100% remission’ for a specific date range and provide a clear reason.
4. Be Aware of Upcoming Legislative Changes
The cost of tax non-compliance is set to rise significantly. According to Bishop Collins Chartered Accountants, from 1 July 2025, ATO interest charges (both GIC and SIC) will no longer be tax-deductible [4]. Currently, individuals and businesses can claim these charges as a deduction to “ease the sting.” After July 2025, the full weight of the current rate—which sits at 10.78% per annum for GIC and slightly lower for SIC—will be born directly by the taxpayer [4].
This change underscores the importance of securing a remission now. If you are struggling with loan calculations or understanding how interest compounds daily, check out our Practical Guide to Calculating Loan Amortization and Compound Interest.
From 1 July 2025, ATO interest charges including GIC and SIC will no longer be tax-deductible, meaning taxpayers will bear the full financial weight of these charges without the current tax offset.
Securing a remission now is critical because current charges are still deductible; once the 2025 legislative changes take effect, the net cost of non-compliance will rise significantly for all taxpayers.
5. Address the “Unfair Advantage” Argument
The ATO’s primary reason for denying remissions is the “unfair advantage” principle. They argue that if you didn’t pay the tax on time, you had use of that money while others did not. To counter this, you must demonstrate that you did not benefit from the delay—for example, the money was stuck in a non-interest-bearing account or was lost due to circumstances beyond your control [1].
The ATO often denies remissions because they believe the taxpayer had the benefit of using money that should have been paid as tax, giving them an unfair financial advantage over those who paid on time.
You can argue against this by demonstrating that the unpaid tax funds were held in non-interest-bearing accounts or were otherwise inaccessible due to factors outside your control.
Summary of Key Takeaways
Determine Eligibility: Ensure your reason for requesting remission fits within PS LA 2006/8.
Document Everything: Create a chronological history of the shortfall period, highlighting any delays caused by the ATO or third parties.
Act Quickly: SIC is calculated daily. The sooner you make a voluntary disclosure or pay the “base” tax amount, the lower the interest will be [3].
Know the Deadline: From 1 July 2025, these interest charges will no longer be tax-deductible [4].
Action Plan: 1. Verify the exact SIC amount on your Notice of Amended Assessment. 2. Draft a “Statement of Facts” detailing why the shortfall occurred. 3. Submit a formal remission request via the official ATO objection form. 4. If the debt is large, consider making an “advance payment” of the shortfall amount before the remission is decided to stop more interest from accruing [1].
While the ATO has the power to be lenient, they prioritize fairness to the broader community. A successful remission request isn’t about asking for a favor; it’s about proving that the application of interest in your specific case does not serve the law’s intent.
| Key Takeaway | Action or Detail |
|---|---|
| Eligibility | Must align with PS LA 2006/8 (Delay, Complexity, Disclosure). |
| Evidence | Maintain detailed logs, timelines, and medical certificates. |
| Policy Change | Interest charges cease to be tax-deductible after 1 July 2025. |
| Best Practice | Make an advance payment to stop daily interest compounding. |
Verify the exact SIC amount on your notice, draft a formal ‘Statement of Facts’ regarding the shortfall, and consider paying the base tax amount early to stop further interest from accruing.
No, a successful request is a legal argument proving that applying interest in your specific case does not serve the intended purpose of the law, rather than a simple request for leniency.