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Investment4 min read

Interest-Only Loans: When Do They Make Sense?

Interest-only loans can be a smart strategy for investors, but they are not for everyone. Here is the full picture.

Raj Bhangu

Principal Mortgage Broker

15 December 2025

Key Takeaways

  • 1Interest-only on $600K at 6%: $3,000/month vs P&I at $3,597/month - saves $597/month
  • 2Best for: investment properties (tax deductions), cash flow management, short-term holds
  • 3Warning: When IO period ends, repayments increase 25-30% substantially

Interest-only loans get a bad reputation, but used strategically, they can be a powerful financial tool, especially for property investors.

The Numbers

On a $600,000 loan at 6%:

  • Interest-only repayments: $3,000/month
  • Principal & Interest (30 years): $3,597/month
  • Monthly difference: $597

When Interest-Only Makes Sense

  • Investment properties: Maximize tax deductions
  • Cash flow management: Free up funds for other investments
  • Short-term hold: Planning to sell within a few years

The Catch

When the interest-only period ends, repayments increase substantially, often 25-30% more.

Want to structure your loans for maximum benefit? Book a consultation to discuss your strategy.

RB

Raj Bhangu

Principal Mortgage Broker

FBAA MemberInvestment Lending Specialist

Expert mortgage broker helping Australians achieve their property dreams with personalized home loan solutions.

Published: 15 Dec 2025

Transparency & Disclosures

Commission Disclosure

As a mortgage broker, iSmart Finance receives commissions from lenders when we successfully arrange a home loan. This does not affect the interest rate or fees you pay. Our service is free for you, and we're committed to finding the best loan for your needs.

About iSmart Finance

iSmart Finance Group ACN 608 986 554 is Credit Representative 481761 of BLSSA Pty Ltd ACN 117 651 760 (Australian Credit Licence 391237). We are members of the Finance Brokers Association of Australia (FBAA) and comply with the National Consumer Credit Protection Act 2009.

Our content is based on industry expertise, regulatory guidelines from ASIC and APRA, and data from the Reserve Bank of Australia. All information is current as of the publication date and subject to change.

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