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Redraw facility
Offset Account
Borrow up to 80%
Extra Repayments
Interest Only
Owner Occupied


/ 5
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Athena Home Loans


Redraw facility
Offset Account
Borrow up to 80%
Extra Repayments
Interest Only
Owner Occupied


/ 5
More details




Athena Home Loans


Redraw facility
Offset Account
Borrow up to 80%
Extra Repayments
Interest Only
Owner Occupied


/ 5
More details


Fixed - 1 year


Adelaide Bank


Redraw facility
Offset Account
Borrow up to 79.9999%
Extra Repayments
Interest Only
Owner Occupied


/ 5
More details






Redraw facility
Offset Account
Borrow up to 80%
Extra Repayments
Interest Only
Owner Occupied


/ 5
More details

Learn more about home loans

What are interest-only loans?

Most mortgages are principal-and-interest loans, which require borrowers to simultaneously pay interest and pay down their principal.

However, with interest-only loans, borrowers only pay interest, which means their principal doesn’t get reduced.

For example, imagine you wanted to buy a $440,000 property. You might borrow $350,000 at an interest rate of 5 per cent, with the mortgage spread over 30 years and repayments scheduled for each month.

If you had a principal-and-interest loan, you would have to pay $1,889 per month – $1,468 of that would be interest, while the other $421 would go towards reducing the principal. (So, after one month, your mortgage would be reduced from $350,000 to $349,579. After two months, it would be reduced to $349,158.)

If you had an interest-only loan, you would have to pay just $1,468 per month. This would be nothing but interest, so your outstanding mortgage would remain at $350,000.

Generally, interest-only loans last for a maximum of five years, at which point the loan automatically reverts to a principal-and-interest loan (although some lenders will allow you to extend the interest-only period).

In the example above, you would now be left with 25 years to repay your $350,000 mortgage, which would require monthly repayments of $2,056.

If you did five years of interest-only followed by 25 years of principal-and-interest, your total cost would be $704,920. If you did 30 years of principal-and-interest, your total cost would be $679,995 – a difference of $24,924.

How do interest-only loans work?

Let’s take the example quoted above – a 30-year mortgage worth $350,000 with monthly repayments and an interest rate of 5 per cent.

The table below shows what would happen if the mortgage functioned as a principal-and-interest loan for the entire 30 years.

It also shows what would happen if you went interest-only for five, 10 or 15 of the 30 years, before switching to principal-and-interest for the remainder of the loan term.

Scenario P&I loan IO for 5 years IO for 10 years IO for 15 years
Monthly repayments during interest-only period $1,889 $1,468 $1,468 $1,468
Monthly repayments after interest-only period $1,889 $2,056 $2,320 $2,778
Total repayments made $679,995 $704,920 $732,963 $764,300
Additional interest paid due to the interest-only period $0 $24,924 $52,968 $84,305

What are the pros of interest-only loans?

Clearly, people take out interest-only loans so they can reduce their repayments during the interest-only period.

But the real point of interest-only loans is not so much to save money but to use this money to do something else.

In the example above, you’d be left with an extra $421 in your pocket each month. 

The boxes below show three ways you could use that extra money to your advantage.

Pro #1. Enter the market ahead of schedule

If you were a young first home buyer, you might not be able to afford to buy your hypothetical $440,000 property if you had to pay $1,889 per month. However, you might be able to afford it if you only had to repay $1,468 per month for the first five years.

Sure, you’d have to pay an extra $24,924 over the life of the mortgage. But if you held off entering the market until you had enough money to afford a principal-and-interest loan, your property might end up costing you an extra $30,000 or $40,000.

Also, by the time your mortgage reverts to principal and interest, your salary is likely to be higher, which would hopefully mean that you could now afford the increased repayments.

WARNING: This strategy could backfire if your property doesn’t increase in value during the five-year period or if you can’t afford the higher repayments once it ends.

Pro #2. Buy an investment property ahead of schedule

Imagine that you used an interest-only loan to enter the market ahead of schedule – but this time with an investment property. And imagine the value of this investment increased by 10 per cent during the interest-only period.

In that case, your property’s value would climb from $440,000 to $484,000 – so you’d pay an extra $24,924 in repayments to gain an extra $44,000 in equity.

Also, if your investment property was negatively geared, you’d be able to use some of the interest payments to reduce your taxable income.

WARNING: This strategy could backfire if your property doesn’t increase in value during the five-year period or if you can’t afford the higher repayments once it ends.

Pro #3. Repay higher-interest debt

Starting your mortgage with an interest-only term could be smart if you also had to repay other debts that were priced higher than the 5 per cent being charged for your mortgage.

For example, you could use the extra $421 per month to pay off a car loan (at, say, 8 per cent), a personal loan (12 per cent) or a credit card debt (15 per cent).

WARNING: This strategy could backfire if you didn’t use the extra money to repay the other debts or if you couldn’t afford the higher repayments once your interest-only period ended.

What are the cons of interest-only loans?

There are two big disadvantages with interest-only loans.

First, your mortgage doesn’t decrease during the interest-only period.

Second, you end up paying more over the life of the mortgage.

The other disadvantage is that the repayments you will be charged once you move from interest-only to principal-and-interest will be higher than if you’d been on principal-and-interest all along.

That could cause problems if your financial position hadn’t improved during the interest-only period.

How do you compare interest-only loans?

You should compare interest-only loans by looking at these five main factors:

  1. Advertised rate
  2. Revert rate
  3. Fees
  4. Comparison rate
  5. Features

All five factors are explained in more detail in the boxes below.

Factor #1. Advertised rate

The advertised interest rate is an obvious place to start when comparing interest-only mortgages.

All things being equal, a home loan with a lower interest rate is better than a home loan with a higher interest. However, as the other comparison points below illustrate, all things are often not equal.

Factor #2. Revert rate

Once your interest-only period ends, your interest-only home loan will revert to a principal-and-interest (P&I) home loan. Lenders generally charge a different interest rate for P&I mortgages than interest-only mortgages, so you’ll also want to compare these ‘revert rates’ when doing your research.

Factor #3. Fees

Interest-only home loans can come with a range of fees that can add significantly to the cost of the mortgage.

You may be asked to pay upfront fees when you apply, monthly/annual fees during the life of the loan and discharge fees whenever you close the loan.

Factor #4. Comparison rate

When you research interest-only mortgages, you’ll be shown two interest rates - the advertised rate and the comparison rate. The advertised rate is just what it looks like - the interest rate you’ll be charged. The comparison rate, by contrast, combines the advertised rate with the main fees you’ll have to pay.

As a result, the comparison rate tends to give a better view of the total cost of the loan than the advertised rate.

Factor #5. Features

Interest-only mortgages may include a range of features that make the loan more flexible and easier to repay. Features might include:

  • Offset account - an offset account is a linked transaction account that not only gives you ready access to cash but also reduces how much interest you’re charged. For example, if you have an outstanding mortgage of $500,000 and an offset account balance of $20,000, you’ll be charged interest on $480,000 rather than $500,000.
  • Redraw facility - a redraw facility allows you to ‘borrow back’ (or redraw) any extra repayments you’ve made. A redraw facility also reduces how much interest you’re charged, just like an offset account.
  • Loan split - a loan split allows you to divide your mortgage into two loans if you can’t decide whether to choose a variable rate or a fixed rate. One loan would have a variable rate and the other would have a fixed rate.
  • Repayment holiday - some lenders will allow you to pause your interest-only mortgage repayments to help you through a life event, such as a pregnancy. However, please note that when your repayment holiday ends, your monthly repayments will probably be increased so your home loan is still paid off according to the original schedule.

Who has the best interest-only loans?

Unfortunately, it’s impossible to say who has the ‘best’ interest-only loans.

One reason is that mortgages are highly subjective - one person might prefer a loan that has a lower interest rate but no offset account, while another might prefer a loan that does have an offset account but comes with a higher rate.

Another point worth mentioning is that lenders often change their interest rates, fees and policies, so whichever interest-only loan you consider the best today might not be the best tomorrow.

Why would I want an interest-only home loan?

Interest-only loans aren’t for everyone, because they come with both risks and disadvantages.

For some people, though, interest-only home loans can make sense, because the mortgage payments are smaller (at least before it reverts to a principal-and-interest loan).

These ‘savings’ can then be used for other purposes, such as buying another property.

How do you take out an interest-only loan?

There are three ways you can take out an interest-only loan:

  1. Use a comparison site (like RateCity)
  2. Go through a mortgage broker
  3. Go direct-to-lender

Are interest-only loans dangerous?

Interest-only loans can be useful products when they’re managed properly - but they can be dangerous when they’re not.

The danger lies in not being able to afford the mortgage repayments once the loan reverts from an interest-only mortgage to a principal-and-interest (P&I) mortgage.

During the interest-only stage, your repayments will be lower than if you had taken out a P&I loan. But once the loan reverts to P&I, your repayments will be higher.

Imagine you take out a $400,000 mortgage with a 30-year loan term and an interest rate of 4.5 per cent. The table below shows how your repayments would differ if you chose a standard P&I loan or a loan with a five-year interest-only term.

Scenario P&I loan IO for 5yrs
Monthly repayments in years 1 to 5 $2,027 $1,500
Monthly repayments in years 6 to 30 $2,027 $2,223
Total repayments made $729,627 $756,999
Additional interest paid due to the interest-only period $0 $27,372

Should I take out an interest-only loan?

People sign up for interest-only loans because they allow you to lower your repayments during the interest-only period.

However, these initial savings come at a cost – literally.

First, you’ll have to accept higher repayments once the interest-only period ends.

Secondly, you’ll have to pay more over the life of the mortgage.

That’s why you should think carefully before taking out this sort of loan.

It sounds obvious, but you should only choose an interest-only loan over a principal-and-interest loan if you’re convinced the short-term gains will exceed the long-term costs.

The key, though, is to actually do your sums.

Frequently asked questions

Interest Rate

Your current home loan interest rate. To accurately calculate how much you could save, an accurate interest figure is required. If you are not certain, check your bank statement or log into your mortgage account.

Savings over

Select a number of years to see how much money you can save with different home loans over time.

e.g. To see how much you could save in two years by switching mortgages,  set the slider to 2.

What is a construction loan?

A construction loan is loan taken out for the purpose of building or substantially renovating a residential property. Under this type of loan, the funds are released in stages when certain milestones in the construction process are reached. Once the building is complete, the loan will revert to a standard principal and interest mortgage.

Mortgage Calculator, Repayments

The money you pay back to your lender at regular intervals. 

Monthly Repayment

Your current monthly home loan repayment. To accurately calculate how much you could save, an accurate payment figure is required. If you are not certain, check your bank statement.

What is a building in course of erection loan?

Also known as a construction home loan, a building in course of erection (BICOE) loan loan allows you to draw down funds as a building project advances in order to pay the builders. This option is available on selected variable rate loans.

What is a fixed home loan?

A fixed rate home loan is a loan where the interest rate is set for a certain amount of time, usually between one and 15 years. The advantage of a fixed rate is that you know exactly how much your repayments will be for the duration of the fixed term. There are some disadvantages to fixing that you need to be aware of. Some products won’t let you make extra repayments, or offer tools such as an offset account to help you reduce your interest, while others will charge a significant break fee if you decide to terminate the loan before the fixed period finishes.

What is a redraw fee?

Redraw fees are charged by your lender when you want to take money you have already paid into your mortgage back out. Typically, banks will only allow you to take money out of your loan if you have a redraw facility attached to your loan, and the money you are taking out is part of any additional repayments you’ve made. The average redraw fee is around $19 however there are plenty of lenders who include a number of fee-free redraws a year. Tip: Negative-gearers beware – any money redrawn is often treated as new borrowing for tax purposes, so there may be limits on how you can use it if you want to maximise your tax deduction.

What is appreciation or depreciation of property?

The increase or decrease in the value of a property due to factors including inflation, demand and political stability.

How much are repayments on a $250K mortgage?

The exact repayment amount for a $250,000 mortgage will be determined by several factors including your deposit size, interest rate and the type of loan. It is best to use a mortgage calculator to determine your actual repayment size.

For example, the monthly repayments on a $250,000 loan with a 5 per cent interest rate over 30 years will be $1342. For a loan of $300,000 on the same rate and loan term, the monthly repayments will be $1610 and for a $500,000 loan, the monthly repayments will be $2684.

Does Real Time Ratings' work for people who already have a home loan?

Yes. If you already have a mortgage you can use Real Time RatingsTM to compare your loan against the rest of the market. And if your rate changes, you can come back and check whether your loan is still competitive. If it isn’t, you’ll get the ammunition you need to negotiate a rate cut with your lender, or the resources to help you switch to a better lender.

Mortgage Calculator, Deposit

The proportion you have already saved to go towards your home. 

Mortgage Calculator, Repayment Type

Will you pay off the amount you borrowed + interest or just the interest for a period?

Remaining loan term

The length of time it will take to pay off your current home loan, based on the currently-entered mortgage balance, monthly repayment and interest rate.

What is an interest-only loan? How do I work out interest-only loan repayments?

An ‘interest-only’ loan is a loan where the borrower is only required to pay back the interest on the loan. Typically, banks will only let lenders do this for a fixed period of time – often five years – however some lenders will be happy to extend this.

Interest-only loans are popular with investors who aren’t keen on putting a lot of capital into their investment property. It is also a handy feature for people who need to reduce their mortgage repayments for a short period of time while they are travelling overseas, or taking time off to look after a new family member, for example.

While moving on to interest-only will make your monthly repayments cheaper, ultimately, you will end up paying your bank thousands of dollars extra in interest to make up for the time where you weren’t paying off the principal.

What is bridging finance?

A loan of shorter duration taken to buy a new property before a borrower sells an existing property, usually taken to cover the financial gap that occurs while buying a new property without first selling an older one.

Usually, these loans have higher interest rates and a shorter repayment duration.

Why is it important to get the most up-to-date information?

The mortgage market changes constantly. Every week, new products get launched and existing products get tweaked. Yet many ratings and awards systems rank products annually or biannually.

We update our product data as soon as possible when lenders make changes, so if a bank hikes its interest rates or changes its product, the system will quickly re-evaluate it.

Nobody wants to read a weather forecast that is six months old, and the same is true for home loan comparisons.

What is 'principal and interest'?

‘Principal and interest’ loans are the most common type of home loans on the market. The principal part of the loan is the initial sum lent to the customer and the interest is the money paid on top of this, at the agreed interest rate, until the end of the loan.

By reducing the principal amount, the total of interest charged will also become smaller until eventually the debt is paid off in full.

How common are low-deposit home loans?

Low-deposit home loans aren’t as common as they once were, because they’re regarded as relatively risky and the banking regulator (APRA) is trying to reduce risk from the mortgage market.

However, if you do your research, you’ll find there is still a fairly wide selection of banks, credit unions and non-bank lenders that offers low-deposit home loans.

What is a specialist lender?

Specialist lenders, also known as non-conforming lenders, are lenders that offer mortgages to ‘non-vanilla’ borrowers who struggle to get finance at mainstream banks.

That includes people with bad credit, as well as borrowers who are self-employed, in casual employment or are new to Australia.

Specialist lenders take a much more flexible approach to assessing mortgage applications than mainstream banks.