What’s Changed
The Treasury Laws Amendment (Tax Incentives and Integrity) Act 2025 has brought into law a key change: interest incurred via the Australian Taxation Office (ATO) for late payments or underpayments, known as the General Interest Charge (GIC), will no longer be deductible for tax purposes for debts incurred on or after 1 July 2025. (ato.gov.au)
Prior to this change, businesses and individuals could deduct GIC from their taxable income; now, this path is closed. Existing GIC incurred before 1 July 2025 remains deductible. (ato.gov.au)
Why This Matters
- Increased cost of non-compliance: If you miss deadlines or underpay, the interest still accumulates, now without the tax shield.
- Cash flow implications: Deduction ability often softened the blow of late payment; its removal elevates urgency around meeting tax obligations on time.
- Behavioral shifts: Businesses may re-prioritize early payments, improved record-keeping, and proactive planning to avoid liabilities that carry non-deductible interest.
Practical Tax Planning Strategies
| Step | Action | Benefit |
|---|---|---|
| 1 | Forecast tax liabilities accurately and set aside funds ahead of due dates (PAYG, BAS, super) | Avoid surprise debts and spare cash in high interest costs later |
| 2 | Negotiate payment plans with the ATO early if cash-flow is tight | Mitigate risk of accumulating non-deductible GIC |
| 3 | Review past practice of incurring GIC and adjust business operations, invoice calendars | Reduced frequency of late lodgement or payments |
| 4 | Keep detailed records of any GIC incurred before 1 July 2025 | Ensure ability to claim those deductions still allowed |
Example Scenario
Sarah runs a small cafe. In July 2025, she underpays her GST for Q4, incurring ATO general interest charge. Under new law, that interest is not tax deductible. Had she resolved payment before 1 July 2025, similar interest would have been deductible. The absence of the tax shield increases her net cost. Lesson: Sarah should build a cash buffer to cover key obligations or engage in payment plan discussions proactively.
Compliance Tips
- Aim to settle PAYG, super, GST obligations before deadlines to keep interest liabilities to zero.
- Use accounting software to track liabilities for payables and tax deadlines.
- Consult with your tax agent or adviser around lodgement reminders and penalty exposure.
Conclusion
The removal of the GIC deductibility from 1 July 2025 means that timeliness in lodgement and payments is now more essential than ever. While past debts may still benefit from deductions, any new interest charges will come at full cost. With careful planning, accurate forecasting, and disciplined payment practices, you can preserve cash flow and avoid costly surprises.