Interest-Only Home Loans

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Last Updated 11/02/2026
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Written by

Kervin Mathew

Last Updated 11/02/2026

What changed?

Updated copy and added additional sections
Our aim is to help you make better informed decisions. That’s why iSelect’s content is produced in accordance with our fact-checking and editorial guidelines.

Edited by

Ellie Garran

Reviewed by

Sam Hyman

Find out more about how we make money.

View our Privacy Policy.

We’ve partnered with Aussie, who’ve helped 1.5 million Australians and counting

iSelect Mortgages Pty Ltd is a credit representative (Credit Representative 400540) of Lendi Group Distribution Pty Ltd (Australian Credit Licence 246786). iSelect Mortgages Pty Ltd receives a commission from Lendi Group Distribution Pty Ltd, the licensee for each new customer account created and for each home loan submitted through this service. Learn more.

What is an interest-only home loan?

If the name hasn’t already given it away, an interest-only loan is a home loan where you repay only the interest on the money you owe. You can do this for a set period, typically at the start of the loan term.

With lower monthly home loan repayments and extra cash in your pocket for other expenses, interest-only mortgages might sound like a dream. Are they the best bet for the long haul, though? Let’s dive into what they are, their benefits, and their drawbacks.

How do interest-only home loans work?

When you break the home loan down to its fundamentals, you have your principal and your interest.

Now, maybe it’s the fact that you’re yet to give them their money back, but lenders in Australia generally consider interest-only home loans as high risk and typically offset the risk with higher interest rates. Additionally, interest-only periods typically last five to 10 years. When the interest-only period ends, the loan usually switches to principal-and-interest repayments, unless you refinance or apply for a new loan arrangement.

The maximum total interest-only period also depends on whether you have an owner-occupied or an investment loan (like when you’re earning rental income from an investment property).

How could interest-only home loans be beneficial?

Despite its higher interest rates, here’s how you can use an interest-only home loan to your advantage.

To claim tax benefits

If you’re an investor, having an interest-only home loan could mean treating yourself to some sweet tax benefits. Interest payments on income-producing investment properties are generally tax deductible for property investors. So if you’re only paying interest, you can usually deduct the whole amount.

To free up cash flow

Maybe you’re looking at closing another debt, investing outside real estate – or you just want that air fryer your neighbour swears by! Your extra cash from not yet needing to repay your principal could help justify loosening up the purse strings.

To help short-term property investors

For investors who choose to treat real estate as a short-term investment, an interest-only home loan might make financial sense considering the lower repayments and accompanying tax benefits. However, if the housing market crashes, you can end up with negative equity.

To lower monthly repayments

Let’s say you absolutely must lock down that dream house, but you have a car loan or you’re saving up for holiday. There’s more room for affordability with an interest-only home loan and its lower monthly repayments.

To build equity more flexibly

While this feature isn’t about paying down your loan balance, it could still be of benefit. Some home loans (including some interest-only loans) come with an offset account linked to your mortgage. Money held in the offset account reduces the balance used to calculate interest, which can lower the interest you pay. Because the funds remain your own cash, you can withdraw them at any time if you need flexibility for things like investments or expenses.

What are some drawbacks of an interest-only home loan?

Icon illustration of a rising bar graph

Higher repayments

No matter how well you prepare for it, you’re bound to feel the bill shock when your interest-only period ends, and the principal starts to feature in repayments.

Risk of negative equity

Real estate is certainly not risk free. If the housing market decides to crash and your property’s value ends up being less than what you borrowed to buy it, you’ll be left with negative equity.

Calculator and money bag

Long-term loss

Because interest-only periods tend to come with higher interest rates and you’re not paying off the principal, you could be stuck in debt for a longer time.

How could interest-only home loans affect my repayments?

So, you’ve managed to snag that perfect home for $650,000 with a down payment of $50,000. For the remaining $600,000, let’s assume you take out a loan with a 30-year term and with a fixed rate of 6.2%.

Because you want to try and minimise the initial impact the repayments will have on your finances, you choose to go with interest-only repayments for the first five years of the loan term.

Take a look at the graph to see how your repayments might pan out.

And just so we’re on the same page with the terminology:

  • principal – money you owe your lender at any time across the loan term
  • interest – the cost of borrowing money calculated using the interest rate
  • interest rate – the percentage rate at which interest is calculated
  • interest-only repayments – loan repayments that cover only the interest
  • loan term – the amount of time you have agreed to repay the loan amount over.

Note: The figures in the table were calculated based on an initial loan amount of $600,000 over a repayment period of 30 years. 

Let’s take a closer look.

From years one to five, you end up paying a total of $37,200 a year. But because the payments are ‘interest only’, the principal remains the same – in other words, you haven’t started paying back the money you borrowed.

When your interest-only period ends, you’re likely to see a sudden jump in your repayments to make up for the initial interest-only ‘honeymoon’ period. Though the silver lining here is that once you start paying off the principal, the interest starts to decrease. That’s because you pay interest on the total outstanding loan amount.

Over the loan term, as the principal reduces, the interest charged generally reduces. Eventually your loan balance also goes down and you get to pay off your loan – which may at times seem like a fairy tale, and you get to live happily ever after in your castle.

Some savvy borrowers also make up for the interest-only ‘honeymoon’ period by making extra repayments (like when they receive a windfall or simply increasing the amount on a regular basis). If you want to see how paying a little extra could make a big difference, you can have a go at our extra mortgage repayments calculator

When you get to the end of your interest-only period, you’re not obligated to stick with your current lender. Your circumstances might have changed, or the markets as a whole might have shifted to lower interest rates. Be sure to shop around so you don’t miss out. You may be able to find a better deal and, who knows, if you show it to your current lender, they might be able to top it. 

It’s also worth having a chat with your mortgage broker to see what the numbers could look like by switching.

Sam Hyman

General Manager – National Sales, Aussie

Frequently asked questions

What’s the difference between interest-only and principal and interest home loans?

Can I pay interest only on a fixed-rate home loan?

What are the rates for interest-only loans?

Can I switch my existing home loan to interest only?

How can I prepare myself for the end of the interest-only period?

Can I extend the interest-only period?

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iSelect is the trading name of iSelect Mortgages Pty Ltd (ABN 86 148 217 181). iSelect Mortgages Pty Ltd is a credit representative (Credit Representative 400540) of Lendi Group Distribution Pty Ltd (Australian Credit Licence 246786). iSelect provides a referral to Lendi Group Pty Ltd, a Credit Representative of Lendi Group Distribution Pty Ltd (Australian Credit License 246786). iSelect Mortgages Pty Ltd receives a commission from Lendi Group Distribution Pty Ltd, the licensee for each new customer account created and for each home loan submitted through this service.