Most Australian home loans cap the interest-only period at five years, but that isn’t the end of the story. In certain investment loan scenarios, a small number of lenders will approve interest-only terms of up to 10 years, and a few can stretch to 15 years under the right conditions. Whether this applies to you depends on your loan-to-value ratio, your income, and the lender’s own policy settings, not on a single industry-wide rule.
If you’re weighing up a longer interest-only period, the most useful thing you can do is separate two ideas: the length of a single approved interest-only term, and the total amount of interest-only time a lender will allow across the life of your loan. These are not the same thing, and mixing them up can lead to unrealistic expectations about what your repayments will look like in five or ten years’ time. This guide walks through when longer terms are available, how your repayments change once principal repayments begin, and what to weigh up before committing to an extended interest-only period.
An interest-only home loan lets you pay just the interest charged on what you’ve borrowed, without reducing the loan principal, for a set stretch of the loan term. Once that interest-only period ends, the loan reverts to principal and interest, meaning your repayments start covering both the interest and the amount you originally borrowed. The overall loan term usually doesn’t change, so a longer interest-only period simply means less time left to repay the principal, which is the detail many borrowers overlook.
When a Longer Interest-Only Term May Be Available
Extended interest-only terms sit mostly in the investment lending space, where a handful of lenders will consider periods beyond the common five-year mark, subject to strict conditions. Eligibility usually comes down to your loan-to-value ratio, the strength of your income, whether you’re an investor or owner-occupier, and the lender’s own risk appetite at the time you apply.
Owner-Occupier and Investment Loan Limits
Owner-occupier interest-only terms are typically capped at five years, sometimes stretching slightly further with strong applications. Investment loans have more flexibility, with some lenders allowing up to 10 years of interest-only repayments, and a smaller group extending this to 15 years for well-qualified investor home loans. This gap exists because lenders treat investment loans differently under their risk models, partly reflecting the tax treatment investors typically receive on loan interest.
Single Period Versus Total Interest-Only Time
A five-year interest-only period approved today doesn’t necessarily mean that’s your only shot at interest-only repayments over the life of the loan. Some lenders separate the single approved interest-only term from the total interest-only time they’ll permit across the whole loan, meaning you might get an initial five-year period, then apply again later for another block, up to an overall cap. This distinction matters because assuming “five years” is a hard ceiling can lead you to plan around the wrong number entirely.
Lender Policy
There’s no standard rule across the industry. Each lender sets its own maximum interest-only term, its own criteria for extensions, and its own view on which loan types qualify. This is why comparing lender policies matters more than chasing a headline interest rate, particularly if a longer interest-only period is central to your plan.
APRA Settings and Credit Approval
The Australian Prudential Regulation Authority (APRA) doesn’t set a fixed maximum interest-only term, but its prudential guidance shapes how cautious lenders are when approving interest-only lending, especially at higher loan-to-value ratios. In practice, this means longer interest-only terms often come with stricter lending criteria, such as a maximum LVR below 80% and closer scrutiny of your ability to service the loan once principal repayments begin.
Why an Extension Is Not Automatic
Reaching the end of an interest-only period doesn’t guarantee you can simply roll into another one. Extending typically requires a fresh credit approval process, where the lender reassesses your income, expenses, and the current value of your property, much like applying for a new loan. If your circumstances have changed, or the lender’s policy has tightened since your last approval, an extension may not be available even if you received one previously.
How Interest-Only Repayments Change Your Loan
During an interest-only period, your monthly repayments cover only the interest charged on your loan balance, so the amount you owe stays exactly where it started. Once the interest-only period ends, your repayments jump to cover both principal and interest, and understanding the size of that jump before it happens is one of the most useful things you can do as a borrower.
The Principal and Interest Components
Every home loan repayment is made up of two parts: the interest component, which is the cost of borrowing, and the principal component, which reduces the loan balance. With principal and interest repayments, both parts are paid from day one, so your loan balance gradually shrinks. With interest-only repayments, you’re only ever paying the interest component, leaving the principal untouched.
Why the Loan Balance Does Not Fall
Because interest-only repayments don’t include any principal repayments, your loan balance at the end of the interest-only period is the same as it was at the start, aside from any extra repayments you’ve chosen to make. On a $700,000 loan, for example, five years of interest-only repayments still leaves you owing $700,000. This is worth sitting with for a moment, because it means none of your equity growth during that period comes from paying down debt, only from any increase in the property’s value.
What Happens When Principal Repayments Begin
When the loan switches to principal and interest, your remaining loan term typically doesn’t extend to compensate, so the principal now needs to be repaid over a shorter timeframe than originally planned. This is what drives the repayment increase, sometimes called payment shock, and it’s more pronounced the longer your interest-only period has been.
Illustrating the Repayment Jump
Consider a $500,000 loan over 25 years at a comparison rate of around 4.8%. Interest-only repayments might sit near $2,010 a month, but once the loan reverts to principal and interest for the remaining 20 years, repayments can climb to roughly $3,250 a month. A repayment calculator lets you model this specific to your loan amount, rate, and remaining term, well before the switch happens, so there are no surprises.
Comparing Interest Only With Principal And Interest
Interest-only and principal and interest loans serve different purposes, and the right choice depends on your cash flow needs, your borrowing power, and how long you plan to hold the property. Interest-only repayments free up cash flow in the short term, but principal and interest repayments build equity and cost less in total interest over the life of the loan.
Short-Term Cash Flow Versus Long-Term Cost
Lower repayments during an interest-only period can help with cash flow, whether that’s covering renovation costs, managing a temporary income drop, or freeing up funds for other investments. That benefit comes at a cost, though: because you’re not reducing the principal, you’ll typically pay more total interest over the life of the loan compared with a principal and interest loan at the same rate.
Equity Growth and Loan-to-Value Ratio
With principal and interest repayments, your loan-to-value ratio (LVR) improves over time simply because you’re paying down the loan balance. With interest-only repayments, your LVR only improves if the property’s value rises, since the debt itself isn’t shrinking. This matters if you’re planning to refinance or access equity later, because a higher LVR can limit your options or affect the interest rate you’re offered.
When Principal and Interest Is Usually More Suitable
For most owner-occupiers and first home buyers, principal and interest repayments tend to be the more suitable long-term structure, since the goal is usually to own the home outright and reduce interest costs over time. Property investors sometimes lean toward interest-only for cash flow and tax reasons, though tax outcomes depend on your individual circumstances and are worth discussing with an accountant rather than assuming based on general commentary.
Using a Split Loan to Balance Flexibility
A split loan, part interest-only and part principal and interest, can offer a middle ground, letting you manage cash flow on one portion while still paying down debt on the other. This structure won’t suit everyone, but it’s worth raising with a mortgage broker if you want some of the flexibility of interest-only without leaving the entire loan balance untouched.
Who May Consider an Extended Interest-Only Arrangement
Extended interest-only periods tend to suit specific situations rather than general home ownership, usually where cash flow flexibility solves a defined problem for a defined amount of time. Property investors, borrowers mid-construction, and those navigating a temporary drop in income are the main groups where a longer interest-only arrangement can make practical sense.
Property Investors Managing an Investment Property
For an investment property, interest-only repayments can help manage cash flow while the property is tenanted, particularly where rental income is tight relative to loan repayments. Some investors also value the tax deductions available on investment loan interest, though how much benefit this provides depends on individual circumstances and is a conversation for your accountant, not a reason on its own to choose interest-only.
Construction and Bridging Finance
Interest-only repayments are common during construction loans, since you’re often paying interest on progressively drawn funds while the property isn’t yet generating income or serving as your home. Bridging loans work similarly, covering the gap between buying a new property and selling an existing one, where interest-only repayments avoid the need to service two full principal and interest loans at once.
Temporary Income Changes and Parental Leave
A period of reduced income, such as parental leave, is another situation where interest-only repayments can ease pressure on a household budget for a defined stretch. This only works well when there’s a clear plan to return to principal and interest repayments once income recovers, rather than treating it as an open-ended solution.
Why It Is Rarely a Long-Term Owner-Occupier Strategy
For owner-occupiers planning to stay in a home long-term, extended interest-only periods are less commonly suitable, since the goal of home ownership is usually to reduce debt over time. Lenders also apply stricter lending criteria to owner-occupier interest-only requests, reflecting the view that this structure is better suited to defined, temporary needs than permanent home finance.
Rates, Features and Costs to Compare
Interest-only home loans often carry a slightly higher interest rate than equivalent principal and interest loans, reflecting the added risk lenders take on when the principal isn’t reducing. Rates, comparison rates, and lender policies shift regularly, so treat any specific figure you see as a snapshot rather than a fixed benchmark, and compare current offers directly with a broker or comparison tool before deciding.
Variable, Fixed and Interest-Only Home Loan Rates
Interest-only repayments can be arranged on either a variable rate home loan or a fixed rate home loan, and each comes with trade-offs. A variable interest rate moves with the RBA cash rate and broader market conditions, while a fixed rate locks in certainty for a set period, though usually with less flexibility to make extra repayments without cost.
Comparison Rates
The comparison rate combines the interest rate with most standard fees and charges, giving a more complete picture of the loan’s cost than the advertised rate alone. When comparing interest-only home loan rates across lenders, checking the comparison rate helps you see past headline pricing to the real cost of the loan.
Fees and Charges
Beyond the interest rate, watch for a valuation fee, ongoing account fees, and any charges tied to switching between interest-only and principal and interest. These fees and charges vary by lender and can add up over the life of the loan, so they’re worth factoring into any comparison.
Offset, Redraw and Extra Repayment Access
Features like an offset account and redraw facility can reduce the interest you pay even during an interest-only period, by lowering the balance interest is calculated on. Not all interest-only loans include these features, or they may come with conditions, so it’s worth confirming exactly what access you’ll have before choosing a lender.
Why LVR and Loan Purpose Affect Pricing
Your loan-to-value ratio and whether the loan is for an owner-occupied home or an investment property both influence the interest rate you’re offered. Lower LVR loans, generally below 80%, tend to attract more favourable pricing and are more likely to qualify for longer interest-only terms, while higher LVR loans face closer scrutiny and, often, higher rates.
Planning for Expiry, Extension or Refinancing
Getting ahead of the interest-only period’s end date puts you in a stronger position, whether you plan to move to principal and interest, apply for an extension, or refinance elsewhere. The steps below focus on practical actions you can take well before your repayments are due to change.
Stress-Testing Principal and Interest Repayments
Before your interest-only period ends, use a repayment calculator to work out what your principal and interest repayments will look like over the remaining loan term. Test this against your current budget, and if the increase feels tight, consider gradually raising your repayments in the lead-up so the jump doesn’t hit all at once.
Preparing Before the Interest-Only Period Ends
Start reviewing your position at least three to six months before the interest-only period expires, rather than waiting for your lender to notify you. This gives you time to gather updated income documents, check your current loan balance, and explore your options without pressure.
Applying to Extend or Change Repayment Type
If you want to extend the interest-only period, remember this generally requires a fresh home loan application and credit approval, not an automatic rollover. Lenders will reassess your income, expenses, and debt-to-income ratio at that point, so it helps to have your financial position in good shape going into the request.
Assessing Refinancing Costs and Alternatives
Refinancing to another lender for a longer interest-only term is an option, but it usually resets or extends your loan term, meaning you could end up paying interest over a longer period overall. Weigh any potential benefit against break costs, valuation fees, and other charges tied to switching, and consider getting a mortgage broker to compare lender policies and structure the loan around your specific goals rather than assuming refinancing is automatically the better path.
Frequently Asked Questions
Can an interest-only period be extended beyond five years?
In some cases, yes, particularly for investment loans where certain lenders allow interest-only periods of up to 10 or even 15 years. Extending isn’t automatic though, and it usually requires a new credit approval where the lender reassesses your income, loan-to-value ratio, and overall financial position.
Which Australian lenders offer interest-only terms longer than five years?
A small number of lenders offer extended interest-only terms, but policies differ significantly and change over time, so there’s no single fixed list. A mortgage broker can compare current lender policies against your situation to see which options might be available to you.
What are the eligibility requirements for a longer interest-only home loan?
Common requirements include a loan-to-value ratio below 80%, strong and stable income to pass the lender’s servicing test, and often a stronger case if the loan is for an investment property rather than an owner-occupied home. Each lender sets its own specific criteria, so eligibility can vary from one application to the next.
How do repayments change when the interest-only period ends?
Repayments increase because the loan switches to principal and interest, and the remaining loan term is usually shorter than the original term. This means the principal needs to be repaid faster, which raises the monthly repayment amount, sometimes significantly depending on how long the interest-only period was.
Are interest rates higher for loans with extended interest-only terms?
Interest-only loans, including longer ones, often carry a slightly higher interest rate than equivalent principal and interest loans, reflecting the extra risk to the lender. Rates vary by lender and change over time, so it’s worth comparing current offers rather than relying on general assumptions.
Can investors and owner-occupiers both apply for a longer interest-only period?
Investors generally have more access to extended interest-only terms, since lenders view investment loans differently due to factors like tax treatment and investment strategy. Owner-occupiers can sometimes access longer terms too, but lenders typically apply stricter lending criteria, and approval is assessed on a case-by-case basis.
