What is the penalty for not lodging a tax return in Australia in 2025-26?

The ATO's Failure to Lodge (FTL) penalty for individuals and small businesses in 2025-26 is $330 for every 28-day period (or part) you're overdue, up to a maximum of $1,650 (5 periods). On top of this, General Interest Charge (GIC) at 10.96% per annum compounding daily applies to any unpaid tax. If the ATO issues a default assessment instead of waiting for you to lodge, a further 75% penalty on the assessed tax liability also applies.

What is an ATO default assessment and how does it work?

A default assessment is the ATO's own estimate of your income and tax liability, based on data it receives from employers, banks, and other third parties. It's issued when you fail to lodge a required return despite being asked. Default assessments typically don't include any assumed deductions, so they often overestimate how much tax you owe. They also attract a 75% penalty on top of the assessed liability. Lodging your actual return (even late) is almost always better than receiving a default assessment.

Can the ATO actually prosecute me for not lodging a tax return?

Yes. Failing to lodge a required tax return is a criminal offence in Australia. The ATO can commence prosecution in your state or territory court, and conviction can result in additional fines and/or imprisonment for up to 12 months. In practice, criminal prosecution is reserved for persistent non-lodgers who ignore all contact. Engaging with the ATO — even if you can't pay — almost always prevents the situation from reaching prosecution.

What if I don't think I need to lodge a tax return?

Use the ATO's 'Do I need to lodge?' tool at ato.gov.au/calculators-and-tools/tax-return-do-i-need-to-lodge for each year you're unsure about. If the tool says you don't need to lodge, submit a non-lodgment advice (NLA) via myGov for that year — without an NLA, the ATO's system still shows an outstanding return, which can trigger compliance action and affect Services Australia entitlements like family payments.

Can the ATO reduce or waive FTL penalties if I lodge late?

Yes. The ATO can remit (reduce or waive) FTL penalties where there was a genuine mistake, the delay was short, or circumstances beyond your control caused the lateness. To request remission, lodge all outstanding returns first, then contact the ATO or submit an objection online explaining the reason for delay and what you've done to fix it. Acting proactively — rather than waiting for the ATO to chase you — significantly improves the chance of remission.

Evidence-backed. Sourced from the ATO, Etax, H&R Block, Accounting Times, RSM and independent tax advisers. General information only — not financial or legal advice. Tax obligations and penalty rates are updated annually. Consult a registered tax agent if you have outstanding lodgements. Last updated: June 2026.

⚡ Key Takeaways

Missing the lodgement deadline triggers a Failure to Lodge (FTL) penalty of $330 for every 28 days overdue, up to a maximum of $1,650 (5 periods). On top of that, General Interest Charge (GIC) accrues at 10.96% per annum compounding daily on any unpaid tax as at April–June 2026. ^[1][7]
If you keep ignoring the ATO, it can issue a default assessment — an estimate of your income based on employer and bank data. That assessment generally contains no assumed deductions, often overestimates your income, and attracts a further 75% penalty on top of the assessed tax liability. ^[2]
Failing to lodge when required is a criminal offence. The ATO can commence prosecution in your state or territory court. Conviction can result in additional fines and/or imprisonment for up to 12 months. ^[2]
The ATO’s post-COVID “soft approach” is over. From 2024–25 it has shifted to firmer, faster enforcement — using director penalty notices, garnishees, and winding-up or bankruptcy actions for those who don’t lodge and don’t engage. The ATO issued 84,529 Director Penalty Notices in 2024–25 chasing $5.5 billion in debts. ^[3][10]
If you don’t actually need to lodge a tax return (income below thresholds, no tax liability), you still need to submit a non-lodgment advice (NLA) so the ATO doesn’t flag an outstanding return — and so Services Australia doesn’t withhold family payments or child support entitlements. ^[5]
Lodging late yourself is almost always better than letting the ATO issue a default assessment. When you lodge, you can claim your legitimate deductions, avoid the 75% penalty, and request remission of FTL penalties by showing genuine effort. ^[2][11]

Didn’t Lodge Your Tax Return? Here’s What the ATO Actually Does in 2026

By The Fine Print editorial team | Last updated: June 2026 | 11 min read | ⚠️ Not financial advice

The ATO doesn’t send the AFP to your door the morning after 31 October. But it also doesn’t shrug and walk away. Not lodging a tax return when you’re required to is one of the most expensive forms of procrastination in Australia’s tax system. The clock starts with a $330 fine, then compounds with 10.96% annual interest, and if you keep ignoring them, escalates to a 75% default-assessment penalty and potentially a criminal charge. Here’s exactly what happens — and what to do about it.

📋 What’s in This Guide

The Failure to Lodge (FTL) penalty — what it costs and when
General Interest Charge — how small debts grow fast
The ATO’s escalation steps if you don’t engage
Default assessments and the 75% penalty
Criminal prosecution — how real is the risk?
Extra consequences for company directors
What if you don’t actually need to lodge?
Three actions to take now if you’re overdue
Frequently asked questions

The Failure to Lodge (FTL) Penalty — What It Costs and When

The Failure to Lodge (FTL) penalty applies when you don’t lodge a required tax return by the due date. It accrues in 28-day blocks, up to a maximum of five periods. For individuals and small businesses in 2025–26, the penalty structure is: ^[7][1]

1–28 days overdue: $330
29–56 days overdue: $660
57–84 days overdue: $990
85–112 days overdue: $1,320
113 days or more overdue: $1,650 (maximum)

The FTL penalty maxes out at $1,650 for individuals and small entities, but higher multipliers apply for large entities and very large entities. Importantly, the FTL penalty applies regardless of whether you actually owe any tax — if you’re required to lodge and you’re late, the penalty can apply even if you would have received a refund. ^[1][6]

💡 Registering with a tax agent by 31 October gives you access to the tax agent lodgement program, which provides extended deadlines (often to May the following year). If you miss 31 October but register with an agent, you may be able to avoid or reduce FTL penalties if you engage proactively. ^[12][13]

General Interest Charge — How Small Debts Grow Fast

On top of FTL penalties, if you have unpaid tax, the ATO charges General Interest Charge (GIC) on the outstanding amount. The GIC rate for April–June 2026 is 10.96% per annum, compounding daily. This is not a trivial rate — it’s higher than most personal loan interest rates and well above current savings rates. ^[7]The compounding-daily mechanism means the debt grows faster than a simple annual rate suggests. Someone who owed $5,000 in tax two years ago and didn’t lodge or pay faces not just the FTL penalty maximum of $1,650, but also GIC running daily on the underlying debt since it was due. The total can reach or exceed double the original tax liability relatively quickly, well before any default assessment penalty is applied. ^[7][2]

The ATO’s Escalation Steps if You Don’t Engage

The ATO’s “If you don’t lodge” page sets out how the escalation works in practice. The sequence is not instant — the ATO typically starts with reminders and only moves to harder enforcement for persistent non-lodgers or those who don’t engage: ^[2]

After the due date: SMS, myGov message, letter or phone reminder
Continued non-lodgement: Failure to Lodge penalty applied
Persistent non-lodgement: Final notice issued
Further non-response: Default assessment issued (ATO estimates your income and tax)
Ongoing non-engagement: Audit selection; refunds retained; referral for prosecution
Business taxpayers: Garnishee notices, Director Penalty Notices, winding-up or bankruptcy proceedings

The key phrase in the ATO’s guidance is “unwilling to work with them.” The ATO distinguishes between people who are late but engaging — who typically receive more lenient treatment and can negotiate payment plans — and those who ignore all contact, who face the full escalation. Engaging early, even if you can’t pay in full, almost always produces a better outcome than silence. ^[2][9]

Default Assessments and the 75% Penalty

If you fail to lodge despite being required to, the ATO can issue a default assessment — its own estimate of your income and tax liability, built from data it already holds: income statements from employers, bank interest, investment income, government payments, and exchange data where relevant. ^[2]

⚠️ Default assessments are almost never in your favour. The ATO’s own guidance acknowledges that default assessments “may not be as accurate” — and in practice they tend to overestimate income because the ATO doesn’t assume deductions it doesn’t know about. If you had legitimate work-related deductions, investment losses, rental property deductions or other claims, none of these will be reflected in the default assessment. You then have to object to overturn it — a process that requires lodging the actual return anyway. ^[9][2]

Making things substantially worse: a default assessment attracts a 75% penalty on top of the tax liability. For every $100 of tax the ATO assesses you as owing, an additional $75 is added as a penalty. On a $10,000 tax liability, that’s $7,500 in additional penalty — before GIC and FTL penalties are counted. ^[2]

Criminal Prosecution — How Real Is the Risk?

The ATO states clearly that failing to lodge a required tax return is a criminal offence. For persistent non-lodgers who ignore all contact, the ATO can commence prosecution in your state or territory court. Conviction can result in additional fines and/or imprisonment for up to 12 months. ^[2]In practice, criminal prosecution is reserved for the most egregious cases — people who have repeatedly and wilfully avoided lodging, often combined with other compliance issues. But it is not an empty threat, and the ATO’s 2026 corporate plan explicitly lists prosecution as one of its enforcement tools for those who don’t engage. The relevant question is not whether criminal prosecution is common — it isn’t — but whether you want to be in the group of taxpayers who give the ATO no other option. ^[4][2]

Extra Consequences for Company Directors

Company directors face a layer of personal liability that employees and sole traders don’t. Director Penalty Notices (DPNs) allow the ATO to hold directors personally liable for unpaid PAYG withholding and superannuation guarantee obligations — bypassing the corporate structure entirely. The ATO issued 84,529 DPNs in 2024–25 alone, pursuing $5.5 billion in debts. ^[3][10]For companies that also fail to lodge BAS or income tax returns, the ATO can combine the non-lodgement enforcement with DPN action, garnishee notices (direct withdrawal from business bank accounts), and winding-up proceedings. The post-COVID leniency period — where the ATO held off on hard enforcement while businesses recovered — is explicitly over. Accounting Times and RSM’s 2026 debt enforcement commentary confirm the ATO is now using its full enforcement toolkit, faster and more consistently than it did in 2022–23. ^[3][4][10]

What if You Don’t Actually Need to Lodge?

Not everyone is required to lodge a tax return. If your income was below the tax-free threshold, your employer withheld the correct amount, and you had no additional income or deductions to claim, you may not need to lodge. The ATO’s “Do I need to lodge?” online tool (ato.gov.au/calculators-and-tools/tax-return-do-i-need-to-lodge) walks through your specific circumstances and gives a definitive answer. ^[5]However — and this matters — if the tool says you don’t need to lodge, you still need to submit a non-lodgment advice (NLA) for that year. Without an NLA, the ATO’s system shows an outstanding return, which can trigger compliance correspondence and, critically, cause Services Australia to withhold or delay family assistance payments, child support, or other government entitlements that depend on confirmed income. An NLA takes a few minutes to submit via myGov and closes the loop cleanly. ^[5]

✅ Three Actions to Take Now if You’re Overdue

Action 1: Find out which years you actually needed to lodge — then fix the record

Use the ATO’s “Do I need to lodge?” tool for each outstanding year separately — your circumstances may have changed between years. If the tool says no for a particular year, submit a non-lodgment advice for that year via myGov to close the outstanding return flag. Do this for every year showing as outstanding in your myGov tax record, not just the most recent one. If the tool says yes, move immediately to Action 2. Each year you delay on a “yes” year is another 28-day block of FTL penalty, plus compounding GIC on any tax owed. ^[5]

Action 2: Lodge before the ATO does it for you

For years you were required to lodge, gather your myGov pre-fill data — income statements, bank interest, government payments, health fund information — which is typically available from mid-July each year. Then either self-lodge via myTax as soon as possible, or register with a registered tax agent who can add you to their lodgement program and help clean up multiple years of unlodged returns (tax agents can lodge overdue returns under their own system even outside normal deadlines). Lodging late yourself is almost always better than a default assessment because you can claim legitimate deductions, claim any refund you’re owed, avoid or significantly reduce the 75% default penalty, and request remission of FTL penalties on the basis that you proactively lodged. If you owe tax and can’t pay in full at lodgement, lodge first — then set up a payment plan separately. Not lodging because you can’t pay is one of the most common and most expensive mistakes people make. ^[2][9][5]

Action 3: Apply for penalty remission and set up a payment plan for any outstanding debt

If you’ve already been hit with FTL penalties or GIC, you can apply for full or partial remission via the ATO’s online objection system or by calling the ATO. The ATO’s remission guidance says it will consider remitting penalties where there was a genuine mistake, the delay was short, or circumstances were outside your control — particularly if you’ve now lodged all outstanding returns and are actively managing the debt. To maximise remission prospects: lodge all outstanding returns first; document the reason for the delay (illness, hardship, natural disaster, confusion about lodgement obligations); and show that you’ve taken steps to ensure future compliance. For outstanding tax debt you can’t pay immediately, use the ATO’s online payment plan system or call 13 11 42 to set up an arrangement — this stops further enforcement and demonstrates good faith. Payment plans don’t eliminate GIC, but they prevent garnishee notices and more serious enforcement actions. ^[11][13][2]

❓ Frequently Asked Questions

What is the penalty for not lodging a tax return in 2025-26?

$330 per 28-day period overdue, up to a maximum of $1,650 (5 periods), plus GIC at 10.96% per annum compounding daily on any unpaid tax. If the ATO issues a default assessment before you lodge, a further 75% penalty on the assessed tax applies. ^[7][1][2]

What is an ATO default assessment?

The ATO’s own estimate of your income and tax, built from employer, bank and third-party data — without any assumed deductions. It almost always overestimates your tax, attracts a 75% penalty, and is harder to reverse than just lodging your actual return. ^[2][9]

Can the ATO actually prosecute for not lodging?

Yes. It’s a criminal offence, with up to 12 months imprisonment and additional fines. In practice, prosecution is reserved for persistent, wilful non-lodgers who ignore all contact. Engaging with the ATO — even if you can’t pay — prevents escalation to this level. ^[2][4]

What if I don’t think I need to lodge?

Use the ATO’s “Do I need to lodge?” tool for each year. If it says no, submit a non-lodgment advice (NLA) via myGov — without it, your account shows an outstanding return, triggering compliance action and potentially affecting Services Australia payments. ^[5]

Can FTL penalties be reduced?

Yes. The ATO can remit FTL penalties for genuine mistakes, short delays, or circumstances outside your control — especially if you’ve since lodged all outstanding returns. Apply via the ATO’s online system after lodging. Proactive engagement significantly improves the outcome. ^[11][13]

⚖️ The Fine Print Verdict

The ATO’s enforcement escalation is designed to make one thing clear: the cost of not lodging always exceeds the cost of lodging late. A $330 penalty in week one becomes $1,650 by month five. Add 10.96% compounding interest on unpaid tax, and then a 75% penalty if the ATO has to assess for you — and what started as avoidance of an uncomfortable task becomes a debt that can easily double or triple the original liability. The post-pandemic soft approach is gone. Director Penalty Notices are up. Garnishees are being used. The single most effective thing anyone with overdue returns can do is lodge something — anything — before the ATO acts first. You can negotiate penalties, set up payment plans, and ask for remission. None of those options are available after a default assessment lands.

👉 Lodge before they do. Even late, even owing money — your own return is almost always better than their default estimate.

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📚 Sources & References

ATO, “Failure-to-lodge-on-time penalty,” ato.gov.au/individuals-and-families/paying-the-ato/interest-and-penalties/penalties/failure-to-lodge-on-time-penalty
ATO, “If you don’t lodge,” ato.gov.au/individuals-and-families/financial-difficulties-and-disasters/if-you-don-t-lodge
Accounting Times / RSM, “RSM flags ATO debt enforcement areas to watch,” accountingtimes.com.au/tax/rsm-flags-ato-debt-enforcement-areas-to-watch
Optima Partners, “ATO corporate plan 2025,” optimapartners.net.au/ato-corporate-plan-2025/
ATO, “Tax return — do I need to lodge?” ato.gov.au/calculators-and-tools/tax-return-do-i-need-to-lodge
Nanak Accountants, “Overdue tax return penalty Australia,” nanakaccountants.com.au/blog/overdue-tax-return-penalty-australia/
Etax, “ATO late lodgement penalty,” etax.com.au/ato-late-lodgement-penalty/
ATO, “Status of your tax return,” ato.gov.au/individuals-and-families/your-tax-return/check-the-progress-of-your-tax-return/status-of-your-tax-return
H&R Block, “No tax return lodged — consequence,” hrblock.com.au/tax-academy/no-tax-return-lodged-consequence
EIN Presswire, “ATO debt enforcement activity increases in 2026 — what it means for small business owners,” einpresswire.com/article/904284062
ATO, “Remission of penalties,” ato.gov.au/individuals-and-families/your-tax-return/if-you-disagree-with-an-ato-decision/dispute-interest-or-penalties/remission-of-penalties
Yahoo Finance, “Only days left to avoid possible $1,650 penalty as tax deadline looms,” au.finance.yahoo.com
MySuperTax, “Late tax return fine Australia,” mysupertax.com.au/blog/late-tax-return-fine-australia/

This article is general information only and does not constitute financial or legal advice. Tax obligations, penalty rates and enforcement practices are subject to change. If you have overdue lodgements, consult a registered tax agent promptly. The Fine Print 🇦🇺 is not affiliated with the ATO.

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