Understanding Portfolio Investment Loans
An investment loan for portfolio growth works differently to a single-property purchase.
When you hold multiple rental properties, lenders assess your total debt position, your rental income across all properties, and your capacity to service additional borrowing. Each new property affects how much you can borrow for the next one. In Malvern East, where properties often carry higher price points and strong rental demand, your first investment sets the foundation for what comes after. How you structure that first loan determines whether you can add a second or third property within a few years or whether you need to wait for value growth.
Consider an investor who purchased a two-bedroom unit in Malvern East as a first investment. They arranged an interest-only loan at 75 per cent loan to value ratio, keeping the repayments lower to maintain serviceability for a second purchase. Within three years, the unit had gained equity, and rental income was covering most of the holding costs. When they applied for a second loan to buy a property in a neighbouring suburb, the lender assessed both properties together. The existing rental income reduced the amount they needed to service from their own salary, which meant they could borrow enough for the second property without needing a pay rise.
Structuring your portfolio from the start means thinking about loan features that support growth rather than just minimising the interest rate on one property. Investment loans with offset accounts, the ability to switch between interest-only and principal-and-interest repayments, and access to equity without refinancing the entire loan all make it easier to add properties over time.
How Lenders Assess Multiple Investment Properties
Lenders calculate serviceability across your entire portfolio, not just the new loan you are applying for.
They add up all your rental income, apply a reduction to account for vacancies and management costs, then subtract all loan repayments, living expenses, and other commitments. The vacancy rate assumption varies by lender but typically sits between 5 and 20 per cent of gross rent. Some lenders also assess investment loans at a higher interest rate buffer than owner-occupied loans, which reduces how much you can borrow. This is where loan structure becomes important. If your existing loans are on principal-and-interest repayments, the higher repayment amount reduces your borrowing capacity for the next property. Switching to interest-only on investment loans, where it makes sense for your situation, can keep serviceability available for growth.
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Malvern East sits in a high-value area with a mix of units, townhouses, and older-style family homes near Chadstone and Central Park. Investors in this suburb often hold properties with strong rental yields from professionals and families who want proximity to Monash Freeway, Darling station, and local schools. When you apply for a second or third loan, lenders will look closely at the rent you are achieving relative to the property value. A property in Malvern East with solid rental income and low vacancy rates strengthens your serviceability position more than a property in an area with patchy demand.
Interest-Only Loans and Portfolio Cash Flow
Interest-only repayments reduce monthly costs and preserve borrowing capacity.
Most lenders offer interest-only periods of up to five years on investment loans, after which the loan converts to principal-and-interest unless you request an extension. During the interest-only period, you pay only the interest charged each month. The loan balance does not reduce, but neither does your repayment amount increase to cover principal. This keeps your monthly outgoings lower, which improves cash flow and leaves more serviceability available when you apply for the next loan. Once the interest-only period ends, the repayment increases because you are now paying off the loan balance over the remaining loan term.
In our experience, investors building a portfolio use interest-only loans to manage cash flow across multiple properties while they are still acquiring. Once the portfolio is complete, they may switch some or all loans to principal-and-interest to start reducing debt. The decision depends on your income, your tax position, and whether you plan to add more properties. Interest on investment borrowings remains deductible regardless of whether the loan is interest-only or principal-and-interest, as long as the property is rented or genuinely available for rent.
Using Equity to Fund Your Next Purchase
Equity in your existing properties can be used as a deposit for the next investment.
As your properties increase in value or as you pay down the loan, the difference between the property value and the loan balance grows. Lenders allow you to borrow against that equity, up to a certain loan to value ratio, without selling the property. This means you can access funds for a deposit on the next investment without needing to save from your salary. Lenders generally cap total borrowing at 80 per cent of the property value to avoid Lenders Mortgage Insurance, though some investors choose to go higher if the numbers support it.
For example, an investor held a townhouse in Malvern East valued at $1.2 million with a loan of $720,000. The property had gained value since purchase, creating $480,000 in equity. The lender allowed them to borrow up to 80 per cent of the value, or $960,000 in total. That left $240,000 in available equity. After setting aside funds for stamp duty, legal costs, and a small buffer, the investor used $200,000 of that equity as a deposit on a second property. They did not need to refinance the original loan or sell anything. The lender simply increased the facility limit and provided the funds at settlement. Refinancing the original loan may have been an option if a different lender offered lower rates or different loan features, but it was not required just to access the equity.
Tax Treatment of Investment Loan Interest
Interest on borrowings used to purchase or hold rental property is deductible against your income.
This applies whether the loan is interest-only or principal-and-interest, variable or fixed. The deduction reduces your taxable income, which lowers the amount of tax you pay each year. Other holding costs such as council rates, insurance, property management fees, repairs, and depreciation are also deductible for the period the property is rented or available for rent. If your deductible expenses exceed your rental income, the loss can generally be offset against your salary or other income, depending on when you purchased the property and the type of property it is.
Under legislation that came into force in June 2026, losses on established residential investment properties purchased after 12 May 2026 can only be offset against income from other residential properties from the 2027-28 income year onward. Properties held before that date, and new builds purchased after that date, continue to allow full deduction of losses against all income. Investors building a portfolio now need to consider the timing of each purchase and whether the property qualifies as a new build if they want to retain full loss offset. Excess losses that cannot be offset in a given year can be carried forward to offset residential property income in future years.
Variable Rate or Fixed Rate for Portfolio Investors
Most portfolio investors favour variable rates for flexibility.
A variable rate investment loan allows you to make extra repayments, redraw funds, and access offset accounts without restriction. It also means you can refinance or restructure the loan at any time without paying break costs. Fixed rates lock in your interest rate for a set period, which provides certainty over repayments but limits your ability to make changes. If you fix the rate and then want to access equity, switch to interest-only, or refinance to another lender, you may face significant break costs.
When you hold multiple properties, the ability to adjust loan structures as your circumstances change is often worth more than the rate certainty a fixed loan provides. Variable rates also tend to move more closely in line with official rate changes, which means you benefit more quickly when rates fall. If you do choose to fix part of your portfolio, consider splitting the loan so that a portion remains variable. This gives you some rate protection while keeping access to offset and redraw features on the variable portion. Fixed rate expiry can create a refinancing opportunity if your circumstances or goals have changed since you first took out the loan.
Loan Features That Support Portfolio Growth
Offset accounts, redraw facilities, and the ability to split loans all matter when you are building a portfolio.
An offset account linked to your investment loan reduces the interest you pay without requiring you to make extra repayments. The balance in the offset account is subtracted from your loan balance when interest is calculated each day. This keeps your funds accessible while lowering your interest cost. A redraw facility allows you to make extra repayments and then withdraw those funds later if needed. Both features are common on variable rate loans but are rarely available on fixed rate products.
Loan splitting allows you to divide a single loan into multiple portions, each with different features or rates. You might have one portion on a fixed rate and another on a variable rate, or one portion interest-only and another on principal-and-interest. Splitting gives you control over how each loan behaves without needing to set up separate facilities. When you are managing multiple properties, the ability to adjust repayment types, access equity, and keep surplus funds working to reduce interest all contribute to stronger cash flow and faster portfolio growth.
Managing Risk Across a Property Portfolio
Concentration in one area or one property type increases your exposure to local market changes.
Investors who build portfolios often spread their holdings across different suburbs, property types, and price points. A portfolio made up entirely of units in one suburb carries more risk than a mix of units, townhouses, and houses across several locations. If rental demand drops in that suburb, or if a large volume of new apartments comes onto the market, your entire portfolio is affected. Diversifying across areas with different economic drivers, tenant profiles, and supply conditions reduces the impact of any single market shift.
Malvern East offers solid fundamentals with proximity to Chadstone, Monash University, and established transport links, but it also sits in a high-value market where price growth can be slower during downturns. Investors based in Malvern East often balance local holdings with properties in growth corridors or regional centres where yields are higher and entry prices are lower. This approach spreads risk and maintains serviceability as the portfolio grows. Borrowing capacity is affected by both the income your properties generate and the total debt you carry, so managing risk is as much about maintaining serviceability as it is about protecting capital.
Structuring Loans in Different Names
How you hold each property affects your tax position, asset protection, and borrowing capacity.
Some investors hold properties in their own name, others use a trust, and some use a combination depending on their circumstances. Holding a property in your personal name gives you access to the 50 per cent capital gains tax discount on any gain when you sell, though changes to the discount apply from 1 July 2027 for gains accruing after that date. Trusts can provide asset protection and flexibility in distributing income, but they come with setup costs, ongoing compliance, and different tax treatment.
When you hold multiple properties, the structure you choose for each one can affect how much you can borrow for the next. Lenders assess serviceability differently depending on whether the loan is in a personal name, a company name, or held by a trust. Personal loans generally offer the widest range of loan products and the lowest rates. Loans to companies or trusts may attract higher rates and stricter serviceability tests. If you are considering a trust structure, speak with an accountant before you purchase, not after. Changing ownership after settlement can trigger capital gains tax and stamp duty. The structure that works for one investor may not suit another, and there is no single approach that fits every portfolio.
When to Speak with a Mortgage Broker
A broker with access to multiple lenders can compare loan features, serviceability policies, and rate discounts across the market.
Not all lenders assess rental income the same way. Some apply a 20 per cent reduction for vacancies and costs, others apply 5 per cent. Some lenders allow you to use 100 per cent of your rental income if the property is in a low-vacancy area, while others cap it regardless of location. These differences affect how much you can borrow and whether you can add another property to your portfolio. A broker who works with portfolio investors regularly will know which lenders offer the most favourable serviceability treatment for your situation and which loan features will support your plans over the next few years.
Plavin Finance works with investors across Malvern East and surrounding suburbs who are building or expanding their property portfolios. We assess your current position, your goals, and the best loan structures to support growth without overextending your serviceability. Whether you are purchasing your first investment property or adding your fourth, call us or book an appointment at a time that works for you.
Important: This does not constitute tax advice and it is recommended to seek advice from your Accountant or Financial Planner for your individual circumstances.
