Australia's small businesses owed about $35.9 billion in collectable tax debt at 30 June 2025, highlighting the scale of unpaid liabilities across the sector.

A performance audit tabled in June 2026 found that the risk associated with rising small business tax debt had moved outside acceptable tolerance levels. The tax administration has since agreed to implement all eight recommendations arising from the review.

For businesses carrying overdue liabilities, the findings point to increased focus on debt management, monitoring and recovery.

What the Audit Found

The audit examined how collectable debt owed by small businesses is managed.

Collectable debt generally refers to amounts that are due and payable and that are considered capable of recovery, as distinct from disputed liabilities or amounts that have been written off.

Small businesses accounted for around 66% of total collectable debt at 30 June 2025.

The total amount attributable to small business had risen by about $19.4 billion between 2018–19 and 2024–25, representing an increase of approximately 118% over that period.

The scale and growth of the debt were central to the audit's concerns.

Why GST and PAYG Withholding Matter

A large share of small business tax debt relates to GST and PAYG withholding.

These liabilities differ from some other forms of tax because they often involve amounts that businesses have already collected or withheld.

GST is collected from customers as part of the price of taxable sales.

PAYG withholding represents amounts deducted from employee wages and held for payment to the tax system.

Where these amounts are not remitted on time, the business effectively retains money that was intended to be passed on.

This can sometimes happen when cash flow becomes strained and businesses use available funds to cover rent, suppliers, wages or other immediate operating costs.

A Simple Example of How Debt Can Build

Consider a hypothetical café that owes $8,000 in GST for a quarter.

The same business also withholds $2,500 a month in PAYG from employees.

If the owner delays paying one quarter of GST and three months of PAYG withholding, the outstanding tax debt reaches $15,500.

If the debt remains unpaid, general interest charge can accrue on the outstanding amount.

Because the charge compounds over time, a liability that begins as a manageable amount can grow significantly if it is not addressed.

If the following quarter is also difficult, the business may accumulate another round of GST and PAYG liabilities before clearing the first.

This illustrates how recurring operating pressure can quickly turn into a larger tax debt problem.

Interest Makes Delays More Expensive

General interest charge applies to certain unpaid tax liabilities.

For the October to December 2026 quarter, the annualised rate is 11.51%.

The charge accrues on unpaid amounts and can materially increase the total debt over time.

Since 1 July 2025, general interest charge incurred in relevant circumstances is no longer tax deductible.

This increases the after-tax cost of carrying unpaid tax debt.

Businesses that leave liabilities unresolved can therefore face both a growing principal amount and accumulating interest.

The Audit Focused on Reduction Targets

One of the main findings was that there were no sufficiently specific internal targets for reducing the volume of small business collectable debt.

The audit recommended the introduction of measurable debt reduction targets, along with improved monitoring and reporting.

All eight recommendations were accepted.

This does not automatically mean that every business with tax debt will face immediate enforcement.

However, the introduction of clearer performance measures could increase pressure to demonstrate that overdue liabilities are being reduced.

What Stronger Oversight Could Mean

The audit does not create new tax collection powers.

Existing recovery tools remain in place.

What may change is the emphasis placed on reducing outstanding debt and measuring the effectiveness of collection activity.

This could lead to more structured follow-up, closer monitoring of overdue accounts and increased use of existing enforcement measures where debts remain unresolved.

At the same time, individual circumstances continue to matter when determining how a debt is managed.

Director Penalty Notices Remain Important

Directors of companies face additional risks where certain liabilities remain unpaid.

Director penalty notices can make directors personally liable for unpaid PAYG withholding, GST and super guarantee amounts in specified circumstances.

This means a company debt can become a personal liability for a director if the relevant conditions are met.

The timing of lodgments is important because late reporting can reduce the options available to directors once a penalty notice is issued.

Keeping activity statements and other required reports up to date therefore matters even where a business cannot immediately pay the full amount.

Payment Plans Can Help Manage Cash Flow

Businesses unable to pay a tax liability in full may be able to enter a payment arrangement.

A payment plan can spread the liability over time, although interest may continue to accrue.

The suitability of a plan depends on factors such as the size of the debt, the business's payment history, cash flow and ability to meet future obligations.

A business that enters a payment arrangement also needs to remain current with new liabilities.

Otherwise, the debt can continue to grow even while earlier amounts are being repaid.

Lodging on Time Still Matters

A business should not assume that failing to lodge is preferable to lodging without payment.

Keeping activity statements and other returns up to date allows the outstanding liability to be identified accurately.

It also gives a clearer picture of the business's overall tax position.

Where lodgments fall behind, the business can accumulate both unreported liabilities and penalties associated with late filing.

For company directors, late reporting can also have consequences under the director penalty framework.

Tax Debt and the Tax Gap Are Different

Collectable tax debt should not be confused with the tax gap.

Collectable debt generally refers to amounts that have been assessed or reported but remain unpaid.

The tax gap measures the difference between the amount of tax that should have been collected and the amount actually collected after compliance activity.

The two concepts can overlap, but they measure different problems.

Small business has historically represented a significant share of the overall tax gap, making compliance in this sector an important area of focus.

Why Unpaid Tax Can Affect Competition

Persistent tax debt can also raise broader fairness concerns.

Businesses that pay tax liabilities on time carry the full cost of compliance.

Businesses that delay remitting GST, PAYG withholding or other liabilities may temporarily retain additional cash.

That can create an uneven competitive environment where unpaid tax effectively operates as a source of short-term finance.

This is one reason why reducing long-standing collectable debt remains an important policy objective.

What to Watch Next

Future annual reporting will provide further information on whether small business collectable debt is beginning to decline.

Another key issue will be whether measurable debt reduction targets are introduced and how performance against those targets is reported.

Businesses may also see more direct contact regarding overdue liabilities as debt management activity becomes more closely monitored.

Any communication about tax debt should be checked through official channels before action is taken, particularly where a message requests urgent payment or personal information.

For small businesses, early management of overdue liabilities remains important because interest and enforcement risks generally increase the longer a debt remains unresolved.