What Is a Property Portfolio Approach to Investment Loans
A property portfolio approach means treating each investment property loan as part of a connected strategy rather than isolated purchases. Each loan affects how much you can borrow next time, what rate you pay, and how lenders assess your serviceability when you apply again.
When you hold multiple investment loans, lenders assess your total debt against your income using a ratio known as debt-to-income. Since February, lenders can only approve 20 per cent of their new investor loans to borrowers with a debt-to-income ratio of six times or greater. If your income is $120,000 and you already owe $600,000 across two properties, you are at the five-times threshold. A third property pushing total debt to $750,000 would exceed six times and may trigger a decline, depending on the lender's current quarterly allocation.
In our experience, investors from Bondi Junction often start with a unit locally, then look to acquire a second property in a suburb with lower entry costs. The challenge is not the deposit for the second property but the serviceability test, which adds a three percentage point buffer to the actual loan rate and assumes rental income at only 80 per cent of market rent.
How Lenders Assess Serviceability Across Multiple Properties
Lenders test your ability to service all loans at the product rate plus three percentage points. Rental income from investment properties is counted at 80 per cent of the assessed market rent, not the full rent you collect.
Consider an investor who earns $140,000 a year, lives in an owned unit in Bondi Junction, and wants to build a two-property portfolio. The first purchase is a unit in Maroubra at $750,000 with a 20 per cent deposit and a loan of $600,000. Rent is $650 per week. The lender assesses serviceability at $600,000 multiplied by the product rate plus three per cent, and credits rental income at 80 per cent of $650, or $520 per week. The investor passes serviceability and settles.
Two years later, the investor applies for a second loan to purchase a unit in Randwick at $800,000, again with a 20 per cent deposit and a loan of $640,000. The lender now tests serviceability on $1,240,000 in total debt, applying the buffer to both loans, and credits rental income from both properties at 80 per cent. Even though the investor's salary has increased and both properties are tenanted, the combined debt serviceability test is significantly tighter. The investor may need to reduce the loan amount, increase the deposit, or choose a lower-priced property to stay within the lender's appetite.
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Should You Use Variable or Fixed Rates in a Portfolio
Variable rates give you flexibility to access equity and make extra repayments without penalties. Fixed rates lock in a known cost but typically include break fees if you need to refinance or sell early.
When you hold multiple properties, the ability to refinance one loan without triggering break costs on another matters. If all loans are fixed and you need to access equity in one property to fund a deposit on the next, you may face break costs on the loan you refinance. A mixed approach, with some loans on variable and others fixed, lets you adjust individual properties without unwinding the entire portfolio.
We regularly see investors choose variable rates for properties they expect to sell or refinance within two years, and fixed rates for properties they plan to hold long term. The decision depends on your timeline, not the rate itself.
Using Equity to Fund Deposits on Subsequent Properties
Equity is the difference between the property value and the loan balance. Lenders allow you to borrow against equity in an existing property to fund the deposit on a new purchase, up to a combined loan-to-value ratio of 80 per cent to avoid lenders mortgage insurance, or higher if you are willing to pay the premium.
If your Bondi Junction unit was purchased at $900,000 with a loan of $720,000, and the property is now valued at $1,000,000 with a remaining loan balance of $680,000, you have $320,000 in equity. At 80 per cent LVR, the lender will allow total borrowing of $800,000 against that property. You already owe $680,000, so you can access $120,000 in equity without paying lenders mortgage insurance.
That $120,000 can be used as a deposit on a second property. If the second property costs $800,000 and you contribute $120,000, you need to borrow $680,000 for the purchase, plus settlement costs. The total loan-to-value ratio on the second property is above 80 per cent, so lenders mortgage insurance applies unless you add cash to bring the deposit to 20 per cent or more.
Lenders assess serviceability on the total borrowing across both properties, including the additional $120,000 borrowed against the first property. The structure of how equity is accessed, whether by increasing the existing loan or creating a separate split, affects how you manage the portfolio over time. Some lenders allow you to split the equity release into a separate loan account, which makes it easier to track deductibility for tax purposes and manage repayments independently.
Interest-Only Repayments and Cash Flow Management
Interest-only repayments reduce your monthly outgoing, which can help you pass serviceability tests when applying for subsequent loans. The loan balance does not reduce, but you preserve cash flow and redirect income toward the next deposit.
Most lenders offer interest-only periods of one to five years on investor loans. After the interest-only period ends, the loan reverts to principal-and-interest repayments, and the monthly cost increases. If you hold three properties all reverting to principal-and-interest in the same year, your cash flow tightens suddenly.
Staggering interest-only periods across properties avoids that concentration. If property one reverts in year three, property two in year five, and property three in year seven, the cash flow impact is spread.
Interest-only loans are treated as higher risk under the capital adequacy rules that apply to lenders, and in some cases attract higher rates or stricter serviceability assessments than principal-and-interest loans. The benefit is cash flow, not cost.
How Negative Gearing Rules Affect New Purchases
For properties purchased before 12 May, rental losses can be deducted against your salary and other income. For established properties purchased after that date, rental losses can only be deducted against other residential property income, including capital gains, from the 2027-28 income year onward.
If you are building a portfolio and purchasing established properties, the tax treatment depends on when you exchanged contracts. Properties held at 7:30pm on 12 May remain fully deductible. Properties purchased after that date are subject to quarantining from the 2027-28 income year, unless the property is a new build that increases dwelling numbers.
The change affects serviceability in two ways. Your after-tax cash flow from new purchases is lower because you cannot offset losses against salary. Lenders may also adjust their assessment of your net income position when calculating serviceability, depending on how each lender interprets the new rules in their policy. We recommend speaking to a broker before committing to a second or third purchase if you are relying on negative gearing to manage holding costs.
Structuring Loans to Preserve Deductibility
Interest on borrowings is deductible when the funds are used to purchase or hold an investment property. Interest on borrowings used for private purposes is not deductible, even if the loan is secured against an investment property.
If you borrow $120,000 against your investment property and use $100,000 for a deposit on a second investment property and $20,000 to renovate your own home, only the interest on $100,000 is deductible. Mixing purposes in a single loan account creates an apportionment problem.
The solution is to split the loan at the time you access equity. One split is for the investment deposit, and the other is for private use. Each split is tracked separately, and only the interest on the investment split is claimed.
If you refinance later and consolidate loans without maintaining the split structure, you may lose the ability to clearly demonstrate the deductible portion. The Australian Taxation Office expects investors to keep records that show the purpose of each borrowing.
Managing Loan-to-Value Ratios as Property Values Change
Loan-to-value ratio is recalculated each time you apply for a new loan or seek to access equity. Lenders use their own valuation, not your purchase price or council valuation.
Property values in areas such as Bondi Junction, Randwick, and nearby suburbs have moved unevenly over the last few years. A property purchased at $850,000 may be valued by a lender at $820,000 if the market has softened or at $900,000 if it has increased. The LVR determines how much equity you can access and whether lenders mortgage insurance applies.
If you are planning to access equity within 12 months of settlement, the lender will often use the purchase price rather than ordering a new valuation. After 12 months, a valuation is required. If the valuation comes in lower than expected, the amount of equity available is reduced, and you may need to contribute additional cash to fund the next deposit.
Some lenders use automated valuation models for loan amounts below a certain threshold, typically $1,000,000 to $1,500,000. These models are based on recent sales data and can be conservative in markets with limited comparable sales. Other lenders require a full valuation for any equity release or refinance.
What Happens When You Refinance One Property in a Portfolio
Refinancing one property within a portfolio is common, either to access equity, secure a lower rate, or move to a lender with different features. The refinance is assessed as a new loan application, and the new lender will test your serviceability across all properties.
If you refinance property one and increase the loan to access equity, your total debt increases. The new lender assesses whether you can service the higher debt level using the same three percentage point buffer and 80 per cent rental income assumption as the original loan. If your income has not increased or if rental income has dropped due to vacancy or market conditions, you may not be approved for the full amount you are seeking.
Existing lenders do not reassess your other loans when you refinance one property elsewhere, but the new lender will ask for statements and rental income evidence on all properties you own. Any rental gaps or periods of vacancy will be visible and will affect the assessment.
Does Location Affect Borrowing Capacity in a Portfolio
Lenders apply postcode-based policies to certain areas, particularly where they identify oversupply, high vacancy rates, or concentration risk. These policies can include higher deposit requirements, lower maximum LVR, or outright exclusions.
Bondi Junction and the surrounding eastern suburbs are generally well-regarded by lenders due to low vacancy rates, strong demand, and proximity to employment and infrastructure. Regional areas, interstate metro areas with high apartment supply, and certain postcodes in mining-dependent towns are more likely to attract restrictions.
If you hold two properties in the eastern suburbs and apply for a third in an area the lender considers higher risk, you may be required to provide a 30 per cent deposit instead of 20 per cent, or the application may be declined. The reverse is also true. A lender may have an internal limit on exposure to a single postcode and decline your application if you already own multiple properties in that area, even if the suburb itself is considered low risk.
You can work around location-based restrictions by choosing a different lender for each property, rather than consolidating all loans with one institution. Different lenders have different appetites, and spreading your portfolio across lenders gives you more flexibility when serviceability or location becomes an issue.
Repayment Structures and Portfolio Cash Flow
Each loan in your portfolio can have a different repayment structure. You might choose interest-only on properties with lower rental yields and principal-and-interest on properties where the rent comfortably covers the repayment.
The structure you choose affects your ability to borrow again. Lenders assess serviceability using the required repayment, not the actual repayment. If you are paying interest-only but the lender calculates serviceability on a principal-and-interest basis, your serviceability is tested as though you are paying more than you actually are.
Some lenders assess interest-only loans using the interest-only repayment for the first five years, then switch to principal-and-interest for the remaining term. Other lenders assess the entire loan as principal-and-interest from day one, regardless of the interest-only period. The policy varies by lender, and it makes a material difference to how much you can borrow on your next purchase.
If you are building a portfolio and relying on interest-only to manage cash flow and maximise serviceability, you need to know which lenders assess serviceability on the actual repayment type and which do not. That is where a broker adds value, because the policy is not published and changes between lenders and over time.
When to Speak to a Broker About Portfolio Strategy
You should speak to a broker before you purchase your second property, not after. The structure you choose on property one affects what you can do on property two. If the first loan is not set up with splits, offset accounts, or the right loan-to-value ratio, you may need to refinance before you can access equity, which adds time and cost.
A broker can also help you understand how different lenders assess portfolio serviceability, which lenders allow you to use equity without paying lenders mortgage insurance, and which lenders have postcode restrictions that affect your purchasing strategy. That information is not available on comparison websites, and it changes regularly based on each lender's risk appetite and funding position.
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Frequently Asked Questions
Can I use equity from my Bondi Junction property to buy a second investment property?
Yes, you can borrow against equity in an existing property to fund a deposit on a new purchase. Lenders typically allow you to borrow up to 80 per cent of the property value without paying lenders mortgage insurance, or higher if you accept the premium. Serviceability is assessed on the total debt across both properties.
How do lenders assess rental income when I apply for a second investment loan?
Lenders assess rental income at 80 per cent of market rent, not the full amount you collect. They also test your ability to service all loans at the product rate plus a three percentage point buffer. This means your borrowing capacity reduces with each property you add to the portfolio.
Should I use interest-only or principal-and-interest repayments on investment loans?
Interest-only repayments reduce monthly costs and preserve cash flow, which can help you pass serviceability tests for subsequent loans. The loan balance does not reduce, and the loan reverts to principal-and-interest after the interest-only period ends, usually one to five years.
What is the debt-to-income limit for investment loans?
Since February, lenders can only approve 20 per cent of their new investor loans to borrowers with a debt-to-income ratio of six times or greater. If your total debt across all properties is six times your income or more, you may be declined depending on the lender's current quarterly allocation.
Do I need to refinance all my properties with the same lender?
No, you can hold loans with different lenders across your portfolio. Spreading loans across lenders can give you more flexibility if one lender has postcode restrictions, serviceability concerns, or lower borrowing capacity than another.
