Should You Keep Your Current Home as an Investment When Upsizing?

It’s a situation I see time and time again. Families work hard to pay down their home loan, building up equity in their owner-occupied (OOC) property. When it’s time to upsize into a new home, their first thought is:

“Why don’t we keep our current property as an investment and use the equity to buy the next place?”

On the surface, it sounds like a smart move. After all, the loan on the existing property is small (or even gone), so it looks like a positive cash flow investment. But here’s the reality:

When you keep your current property and buy a new owner-occupied home (OOC), you’re effectively borrowing 100% of the new home’s purchase price—plus all associated costs. This creates a significant debt trap that many homeowners don’t anticipate.

• The debt on the new OOC is non-deductible. This is where the Loan Structure becomes critical.

• While the “investment” may look attractive on paper, the reality is harsh: you’re paying off a large non-deductible loan entirely with after-tax income. Every dollar you earn must first be taxed before it can go toward your mortgage, significantly increasing the true cost of homeownership

• This hidden cost—the combination of 100% borrowing, non-deductible debt, and after-tax repayments - can amount to tens of thousands of dollars in lost wealth every single year. Without proper planning, you’re trapped in an expensive cycle that silently erodes your financial position.

Another factor many homeowners don’t consider is the 6-year rule.

Under the ATO’s rules, your primary residence is exempt from capital gains tax (CGT) if it’s sold within 6 years of moving out.

This means that by selling your OOC when you upsize, you can:

• Unlock tax-free equity.
• Pay down or eliminate the non-deductible debt on your new home.
• Strengthen your long-term wealth position.

Key Point: Your primary residence (your home) is generally exempt from capital gains tax (CGT).

Usually, a property stops being your main residence when you stop living in it. However, for CGT purposes, you can continue treating a property as your primary residence: For more details, visit the ATO site - Treating former home as main residence.

Holding onto the old property may feel safe, but it usually backfires when it comes to borrowing power.

• A large non-deductible loan on your OOC reduces your borrowing capacity.
• With less capacity, your ability to purchase more investment properties is severely limited.
• By selling, you can convert your equity into cash and create more room to grow your portfolio strategically.

For many families, the smarter financial strategy is:

1. Sell the existing home while it qualifies for the CGT exemption.
2. Use the sale proceeds to reduce or clear non-deductible debt on the new OOC.
3. Leverage equity in the new OOC to invest in one or more properties with tax-deductible debt.

This approach often leaves you with a better cash flow and tax position, and gives you the flexibility to build a larger investment portfolio over time.

While keeping your old home as an investment may sound appealing, the reality is that it often costs you more than you realise.

By selling and structuring your debt correctly, you can reduce tax leakage, boost borrowing power, and create a stronger foundation for long-term wealth.

The right debt strategy can save you thousands and open the door to future investments.

Don’t let non-deductible debt hold you back. Let’s look at your numbers and see which option leaves you better off.

Want clarity before making a six-figure decision?

(No cost, no obligation — just friendly advice.)