29/08/2026
Interest Only vs Principal & Interest - what’s actually the difference? 🏡
With Principal & Interest (P&I), each repayment goes towards both the interest charged and reducing your loan balance.
With Interest Only (IO), your required repayments during the interest-only period generally only cover the interest - meaning the principal balance isn’t being paid down.
So why would someone choose Interest Only?
For some property investors, it can help with:
• Managing cash flow
• Keeping more cash available
• Directing surplus funds elsewhere
• Structuring investment debt more effectively
But lower repayments today don’t necessarily mean a lower overall cost.
Once the interest-only period ends, repayments will generally increase as you begin paying down the principal over the remaining loan term.
Neither option is automatically better - the right structure depends on what you’re trying to achieve.
Tom Mather is a Credit Representative (544615) of ratesonline.com.au Pty Ltd, Australian Credit Licence 384404.
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