A second mortgage to clear tax debt: when it makes sense, and when it doesn't

For many business owners, the biggest asset isn’t in the business at all. It’s the family home, or an investment property bought years ago. When the ATO is pressing and the business can’t pay, that equity is often the most straightforward way out. A second mortgage lets you use it without touching the home loan you already have.

How does a second mortgage work?

A second mortgage is a loan secured on a property that already has a first mortgage. The existing first mortgage stays exactly as it is. The second lender registers its mortgage behind it and lends against the equity that’s left.

If the property is sold, the first mortgage is repaid first, then the second. That’s why a second lender looks closely at the property’s value and the first mortgage balance.

Second mortgages sit within the property-secured range of $20,000 to $5,000,000, over residential or commercial property owned by the business, a director or a related party.

Why is it so useful for tax debt?

Because paying the ATO in full ends several problems at once:

ATO problem	What paying out does
Growing general interest charge	Stops it — and ATO interest from 1 July 2025 isn’t deductible anyway
Director penalty notice	Clears the penalty, lockdown or not
Garnishee	Gives the ATO a reason to withdraw it
Notice of intent to disclose	Stops the debt reaching credit bureaus
Statutory demand	Satisfies it before the 21 days end
Future lending	A cleared ATO balance looks very different to the next lender

For a director with a lockdown DPN, this matters most. Administration won’t clear a lockdown DPN; payment will. A second mortgage is frequently how that payment is made.

When does a second mortgage make sense?

Four conditions, ideally all met:

1. The business is viable. Profitable now, or clearly heading there once the tax debt is gone.
2. There’s genuine equity. Enough behind the first mortgage to cover the tax debt with a comfortable margin.
3. The borrower understands the risk. Especially where the property is a family home or belongs to a relative.
4. There’s an exit. Refinancing into the first mortgage later, selling an asset, or repaying from improved trading.

If those line up, a quick enquiry lets a lending specialist check the numbers with you. It doesn’t involve a credit check.

When doesn’t it make sense?

Be wary if:

• the business is losing money every month and the ATO debt will simply rebuild
• the equity is thin, leaving little margin if property values move
• the only exit is “hope things improve”
• the tax debt is a small fraction of a much larger problem that a second mortgage won’t solve

In those cases, a smaller unsecured facility, a payment plan, or a whole-of-business review may be the better step.

An illustrative example

Illustrative only. A Sydney plumbing company owes the ATO for three quarters of GST and PAYG withholding after two large builders went into administration owing it money. The director receives a lockdown DPN. The company is profitable again with new builder clients, and the director’s home has solid equity behind a modest mortgage. A second mortgage pays the ATO within the 21 days. After 18 months of clean BAS, the director refinances the home loan and second mortgage into one facility.

Second mortgage, caveat loan or full refinance?

Option	Paperwork	First mortgage	Typical use
Caveat loan	Usually the least	Untouched	Very short-term, deadline-driven
Second mortgage	Moderate	Untouched	Clearing tax debt with a medium-term plan
Full refinance	Most	Replaced	When there’s time and the whole structure needs resetting

If the deadline is very close, a caveat loan may be used first and refinanced into a second mortgage later. If several debts need clearing, a consolidation may suit better.

What should I prepare?

• Rates notice and the latest first mortgage statement
• An ATO integrated client account statement showing the tax types
• Any DPN, garnishee or demand letters
• Six months of business bank statements and the latest BAS
• A short explanation of how the tax debt built up and what has changed

Before you call the ATO about any of this, our guide on calling the ATO when you can’t pay will help.

What questions should I ask before signing?

• What is the estimated total cost of finance over the expected term, including fees?
• What is the term, and what happens at the end of it?
• Are there early repayment costs if I refinance sooner?
• Does the lender pay the ATO directly at settlement?
• What are the default terms, and what happens if a repayment is late?
• Does anyone else who owns the property need independent advice?

Clear answers to these make the decision safer, and a good lender will be happy to give them.

Could your property equity clear the tax debt?

We help owners use property equity to pay out the ATO all the time, and we’re comfortable with files that have ATO debt, DPNs and bruised credit. What we care about is whether the business is sound and whether the plan to repay is real.

It takes about 60 seconds to enquire, and there’s no credit check at that stage. Your details aren’t passed to a list of lenders who’ll all phone you. A real person looks at your situation and calls you back. Please enter the ATO balance, the property value and the first mortgage balance as accurately as you can, so we can tell you quickly whether a second mortgage is realistic.

Check if a second mortgage could pay out the ATO →