Filing tax returns on time is a crucial responsibility for individuals and businesses. However, there are instances where you might find yourself filing late. Understanding the implications of late tax return submission is important to avoid potential penalties and complications. I’m here to guide you through what happens if your tax return is late.

  1. Late Lodgment Penalties
    • Penalty Units: The Australian Taxation Office (ATO) can impose penalties for late lodgment. These penalties are calculated based on ‘penalty units’, which are periodically adjusted for inflation.
    • Calculation of Penalties: Currently, for each period of 28 days that the return is overdue, one penalty unit can be applied, up to a maximum of five units.
  2. Interest Charges
    • General Interest Charge (GIC): Besides penalties, the ATO may also apply a general interest charge on any taxes owed. This interest accumulates daily and is compounded until the outstanding amount is paid.
  3. Impact on Tax Refunds
    • Delay in Refunds: If you are entitled to a tax refund, filing late can delay the processing and issuance of your refund.
    • Offset Against Debts: In some cases, if you have other tax debts, the ATO may use your refund to offset these debts.
  4. Risk of Audit and Review
    • Increased Scrutiny: Late lodgment can attract increased attention from the ATO, potentially leading to an audit or review of your tax affairs.
    • Record Keeping: It’s crucial to maintain accurate and comprehensive records to substantiate the information in your tax return, especially if you file late.
  5. Options for Individuals and Businesses
    • Tax Agents: If you are using the services of a registered tax agent, you may have access to extended lodgment deadlines.
    • Communication with ATO: If you anticipate a delay in filing your tax return, it’s advisable to communicate with the ATO as soon as possible. In some cases, the ATO may offer a payment plan or an extension.
  6. Preventing Late Lodgment
    • Organise Records: Keep your financial records well-organised throughout the year to simplify the tax return process.
    • Plan Ahead: Start preparing your tax return well before the deadline to avoid last-minute rushes.
  7. Seeking Professional Help
    • Consult with an Accountant: If you are concerned about filing your tax return late, consulting with an accountant can provide guidance on the best course of action and help in dealing with the ATO.


Filing your tax return late in Australia can lead to penalties, interest charges, delayed refunds, and increased risk of ATO scrutiny. To avoid these consequences, it’s important to plan ahead, keep good records, and seek professional assistance if needed. Remember, staying proactive and informed about your tax obligations is key to avoiding complications with the ATO.