Missed the deadline? You're not alone, and it is usually far easier to fix than people expect. Here's what late lodgement actually means, what it can cost, and the fastest way to get back on track.

The most important thing: lodge as soon as you can. The longer a return stays overdue, the more likely penalties become, and the longer you wait for any refund you are owed.

When is the deadline?

If you lodge your own tax return, it is due by 31 October after the end of the financial year on 30 June.

If you are on a registered tax agent's client list before 31 October, you can usually lodge later under the agent's lodgement program. For many individuals that means as late as 15 May the following year, although some people have earlier due dates, for example if earlier returns are still outstanding. We will confirm your exact due date when you get in touch.

Already past 31 October? It is still worth contacting a tax agent now. You'll be lodging late, but an agent can deal with the ATO for you, catch up any earlier years at the same time and help keep penalties to a minimum.

What can happen if you lodge late

1. A failure-to-lodge penalty

The ATO can charge a failure-to-lodge (FTL) penalty of one penalty unit for every 28 days (or part of 28 days) your return is overdue, up to a maximum of five penalty units for individuals and small businesses. At current values that maximum is more than $1,600 per return.

In practice, the ATO often doesn't apply the penalty when someone lodges voluntarily, especially if they are owed a refund. Penalties become far more likely if you owe tax, have several years outstanding or have ignored ATO reminders.

2. Interest on tax you owe

If your return shows you owe tax, the general interest charge (GIC) can apply to the unpaid amount from the date it was due. GIC compounds daily, so a small debt left alone can grow.

3. A delayed refund

Many people with overdue returns are actually owed money. Until you lodge, that refund simply sits with the ATO.

4. Knock-on effects

  • Family Tax Benefit: you generally need to lodge (or tell Services Australia you don't need to) within 12 months of the end of the financial year to receive any FTB top-up.
  • Loans and finance: lenders often ask for recent notices of assessment.
  • ATO enforcement: if returns stay outstanding, the ATO can issue a default assessment based on its own estimate of your income, and in serious cases take further action.

How to get back on track

  1. Get in touch with a registered tax agent. Once you are on our client list we can see your ATO records, including which years are outstanding.
  2. Gather what you can. Much of your income information is already with the ATO. Use our tax return checklist for the rest.
  3. Lodge every overdue year. We will prepare and lodge all outstanding returns together.
  4. Sort out any debt. If you owe tax, we can help you set up a payment plan with the ATO.
  5. Ask about penalties. Where a penalty is applied, we can request remission if there were circumstances outside your control.
Not sure you need to lodge at all? If your income was below the tax-free threshold and no tax was withheld, you might not need to lodge. In that case you lodge a non-lodgment advice instead, so the ATO knows. We can check this for you.

Let us handle it

Overdue returns are something we sort out regularly, without judgement. Book a free 15-minute call or call us on 0413 137 555, and we'll tell you exactly where you stand. If your return is a simple salary and wage one, it may qualify for our $109 tax return.