This article first appeared on awesomelendingsolutions.com.au.
Interest-only loans are popular with property investors because they lower repayments and free up cash flow. But they also have risks, especially when the interest-only period ends. Here's how they work and when they make sense.
What is an interest-only loan?
With an interest-only loan, your repayments only cover the interest for a set period, usually one to five years. You don't pay down the loan balance during that time.
When the interest-only period ends, the loan usually switches to principal and interest. Because you now have fewer years left to repay the full amount, your repayments can jump sharply.
Why investors use interest-only loans
1. Better cash flow
Lower repayments can make an investment property easier to hold, especially when rents don't fully cover costs.
2. Pay down non-deductible debt first
Interest on your home loan isn't tax deductible, but interest on investment loans usually is. Many investors keep their investment loans interest-only and put extra money into their home loan or offset account. This reduces their non-deductible debt faster.
3. Flexibility
Lower required repayments give you room to handle vacancies, repairs or rate rises.
The downsides
- You don't build equity through repayments. You rely on the property growing in value.
- Higher interest rate. Interest-only rates are usually higher than principal and interest rates.
- More interest overall. Because the balance doesn't fall, you pay more interest over the life of the loan.
- Repayment shock. When interest-only ends, repayments can rise significantly.
The repayment jump: an example
Leah has a $600,000 investment loan at 6.5% over 30 years, with five years interest-only.
- Interest-only repayments: about $3,250 a month
- After five years: she must repay $600,000 over 25 years. Repayments rise to about $4,050 a month.
That's an increase of around $800 a month. Planning for this is essential.
How lenders assess interest-only loans
Lenders assess interest-only loans carefully. They usually calculate your repayments as if you were paying principal and interest over the shorter remaining term, plus the 3% serviceability buffer. This means interest-only loans don't usually increase how much you can borrow.
Lenders may also ask why you want interest-only and how you plan to repay the loan.
Interest-only and the 2026 tax changes
The new negative gearing rules mean that for established residential properties bought after 7:30pm on 12 May 2026, rental losses can't be used against your wage income from 1 July 2027. If your property runs at a loss, the after-tax cost of interest-only repayments may be higher than before. Investors in this situation may want to focus more on cash flow.
For new builds and grandfathered properties, the existing tax treatment generally continues.
What to do when your interest-only period ends
You have several options:
- Switch to principal and interest – often at a lower rate.
- Ask for a new interest-only period – with your current lender, subject to approval.
- Refinance – to a lender that will offer a new interest-only period.
- Sell – if the property no longer fits your plans.
Start reviewing your options three to six months before the interest-only period ends.
Is interest-only right for you?
Interest-only may suit you if:
- You're an investor with a home loan you want to pay down first
- You have a clear plan for the loan
- You can comfortably handle the higher repayments later
It may not suit you if:
- You're stretching your budget to afford the property
- You're relying solely on growth
- You have no plan for when the interest-only period ends
Frequently asked questions
Can owner-occupiers get interest-only loans?
Yes, but it's less common and lenders may be stricter. It's usually used for short periods, such as during parental leave.
Is interest-only interest tax deductible?
For investment properties, interest is generally deductible, subject to the 2026 rules for new purchases of established homes.
How long can interest-only last?
Usually up to five years for investors, sometimes longer with some lenders.
Can I make extra repayments on an interest-only loan?
Usually yes, but for investors it often makes more sense to put spare money in an offset account or against the home loan.
Planning ahead: a simple checklist
- Note the date your interest-only period ends
- Work out your future principal and interest repayment now
- Build a cash buffer to cover the increase
- Review your rental income and costs each year
- Talk to your broker six months before the period ends to compare your options
A little planning turns a potential repayment shock into a smooth, manageable transition.
Talk to Awesome Lending Solutions
Every situation is different, and the right loan depends on your goals, income and timing. At Awesome Lending Solutions, we compare a wide panel of lenders and explain your options in plain English, with no pressure. Call us on 02 7904 9560 or visit awesomelendingsolutions.com.au to book a chat.
This article is general information only. It does not consider your objectives, financial situation or needs, and it is not financial, tax or legal advice. Scheme rules, interest rates and laws were current as at October 2026 and can change. Speak with a licensed professional before making any decision. Albert Waldron is a Credit Representative (CR 407514) of AFG's Australian Credit Licence 389087.

