ATO debt and small business insolvency: what the numbers mean

How much ATO debt is out there?

Small businesses hold $35.9 billion of the ATO’s $54.2 billion in total collectable debt, meaning small business makes up the large majority of everything the ATO is chasing. As at 30 June, 35,361 businesses carried outstanding tax debt over $100,000, and 53.8% of those were sole traders.

This isn’t a fringe problem. A large part of the small business sector is, in effect, funding itself through unpaid tax, whether it meant to or not.

What’s the actual insolvency risk once debt passes $100,000?

Businesses carrying ATO debt over $100,000 have recorded a 21.9% insolvency rate over the past 12 months, 31 times the national average of 0.7%. That’s not a slightly elevated risk. It’s a category shift. A business in that position is statistically far more likely to fail than almost any other business in the country.

The number doesn’t mean a business with six-figure ATO debt is doomed. It means the debt has usually stopped being a cash flow timing issue and become a structural one, which changes what needs to happen next.

Is ATO enforcement getting more aggressive?

Yes. Director penalty notices, garnishee notices and asset freezes are all being used more often, and ATO court recoveries continue to increase year on year, driven partly by Australian National Audit Office pressure on the ATO to collect more actively. The era of a tax debt quietly sitting on the books indefinitely is largely over, and the RBA’s own October 2025 Bulletin makes the same point from a different angle, noting that the removal of pandemic-era support, including the ATO resuming enforcement action on unpaid taxes, has been a real driver of financial pressure on small businesses over the past few years.

See our director penalty notice guide for what that escalation step involves and the 21-day window it carries.

When does refinancing the debt help, versus just delaying the problem?

Refinancing tends to help when the rest of the business is sound and the ATO debt is the thing holding it back: from bank eligibility, from cash flow, from being able to plan. It tends to just delay the problem when the debt exists because the business can’t generate enough cash to service its obligations. Then adding a new facility on top of an unresolved cash flow gap makes the underlying problem worse, not better.

The difference between those two situations is usually obvious to an accountant or broker looking at the full picture, even when it isn’t obvious from inside the business. Get that second opinion before you decide.

Frequently asked questions