What happens if you don't pay the ATO?
Short answer
Interest starts immediately, and enforcement follows in stages. From the day after the due date the ATO charges general interest at 11.43% per year, compounding daily. Then come reminders, then firmer action such as garnishee notices, credit reporting and director penalty notices, then court. Nothing forces the ATO to warn you of the exact date each step happens. Setting up a payment plan stops most of it.
The sequence, from due date to court
The ATO's own material describes three phases: interest and reminders, then firmer action, then legal action. In practice it looks like this.
- Day one after the due date. General interest charge (GIC) is added automatically. It compounds daily and, since 1 July 2025, is not tax deductible. A $20,000 debt grows by roughly $190 in the first month.
- The first weeks. You get an SMS, a myGov message, a letter or a phone call. Any refund or credit you become entitled to is taken and applied to the debt without asking you.
- Weeks to months. If there is no response, the ATO may send a pre-referral warning letter and hand the debt to a collection agency such as recoveriescorp. The money still goes to the ATO. See ATO debt collectors.
- Firmer action. This is where it gets expensive: a garnishee notice to your bank or employer, disclosure of business debts of $100,000 or more to credit bureaus, or a director penalty notice that makes company directors personally liable.
- Legal action. A statement of claim in court, a bankruptcy notice for individuals, or a statutory demand and winding up application for companies. Each of the 21 day notices at this stage is a real deadline.
What decides how fast it moves
There is no fixed calendar. The ATO says it is more likely to start firmer action when someone refuses to engage, keeps ignoring reminders, repeatedly defaults on payment plans, or lets GST, PAYG withholding and employee super go unpaid. Those four things are the real triggers, and three of them are about behaviour rather than the size of the debt.
That is why two people with the same $50,000 debt can have completely different experiences. One calls, sets up a plan and hears nothing more. The other stays quiet and gets a garnishee. The full timeline is on our ignoring ATO debt page.
SILENCE IS NOT A STATUS
The ATO already knows what you owe from your BAS, your return and payroll data. A quiet account is not a forgotten account. It is one moving through a queue.
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What actually stops the escalation
Engagement. That is the word the ATO uses, and it means one of these:
- Paying in full, even if you have to borrow to do it.
- A payment plan you can actually keep. Debts up to $200,000 can be set up online in minutes.
- If you genuinely cannot pay, telling the ATO that and asking about hardship or other options before it acts. See what to do if you can't pay a tax bill.
Interest keeps running inside a plan unless you ask for it to be remitted, so a plan is a way to stop enforcement, not a way to stop the cost. But a kept plan blocks credit reporting, usually lifts a garnishee, and takes you out of the firmer action queue.
What to do next
- Log in to myGov or Online services for business and check the exact balance and which debts are overdue.
- If the total is under $200,000, look at whether a payment plan you can keep is possible today.
- If you cannot afford any plan, or a notice has already arrived, talk to someone before the next deadline rather than after it.
Related questions
Will the ATO tell me before it takes firmer action?
Usually, but not always in a way you will notice. Reminders come by SMS, myGov message, letter and phone, and credit reporting requires a 28 day notice of intent. A garnishee notice, though, is sent to your bank or employer and you may only find out when the money is gone.
Does the ATO charge interest on a small debt?
Yes. GIC applies to any unpaid amount from the day after the due date, regardless of size. Small debts are less likely to attract firmer action quickly, but they still grow, and refunds are offset against them automatically.
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