Top Strategies to Finance a Rental Property in Brisbane

Buying an investment property in Brisbane starts with the loan, not the property search.

The features you choose on an investment loan, the way you structure your borrowing and the deposit you provide all shape what you can buy, how much passive income you can access and how quickly you can grow a portfolio. Understanding the difference between interest only and principal and interest repayments, knowing what lenders count as rental income and recognising when to fix or keep a variable interest rate will determine whether the investment stacks up financially or ties up cash you need elsewhere.

Investment Loan Features That Affect Your Cash Flow

An investment loan for a rental property typically offers a choice between interest only and principal and interest repayments. Interest only loans let you pay only the interest portion each month, which keeps repayments lower and can maximise tax deductions because all the interest paid is typically deductible. Principal and interest loans require you to pay down the loan amount over time, which reduces your overall debt but increases the monthly repayment and reduces the portion you can claim.

Consider a buyer who purchases a unit in New Farm to rent out. On a $600,000 loan, an interest only repayment might sit around $2,500 per month, depending on the rate. Switching to principal and interest on the same loan could lift repayments to around $3,200 per month. If the unit rents for $650 per week, that is roughly $2,817 per month in rental income. With interest only, the investor is closer to covering the loan from rent alone, especially after accounting for claimable expenses such as property management fees, insurance and council rates. With principal and interest, they need to contribute more from their own income to cover the shortfall each month.

The choice depends on your property investment strategy. If you plan to build wealth by holding multiple properties and using equity release from one to fund the next, interest only loans preserve cash flow and allow faster portfolio growth. If your aim is to reduce debt and own the property outright, principal and interest makes sense, particularly as you approach retirement or if rental income is strong enough to cover the higher repayments without strain.

How Lenders Assess Rental Income on Your Investment Loan Application

Lenders do not count 100 per cent of the rent you expect to receive when assessing your borrowing capacity. Most lenders apply a vacancy rate, which assumes the property will sit empty for part of the year. The standard approach is to assess 80 per cent of the expected rental income, which accounts for vacancies, tenant transitions and potential maintenance periods.

If a property in Paddington is expected to rent for $700 per week, the lender will assess your income as roughly $560 per week for serviceability purposes. That difference affects how much you can borrow. In areas where vacancy rates are historically low, the discount still applies because lenders base their policy on prudent long-term assumptions, not current market conditions.

Your other borrowing also matters. Investment loans are assessed under a serviceability buffer, meaning lenders calculate whether you can afford the repayments at a rate roughly 3 percentage points above the actual loan product rate. If your loan has a variable interest rate currently sitting around 6 per cent, the lender will test whether you can still meet repayments if rates were closer to 9 per cent. This is not the rate you pay, but it shapes the loan amount you can access. Lenders also apply debt-to-income limits, which cap how much total borrowing you can hold relative to your income. These limits apply separately to investor and owner-occupier lending but are measured across your total position.

Variable Rate vs Fixed Rate for Property Investment

Most property investors choose a variable rate because it offers flexibility. You can make extra repayments without penalty, redraw funds if you need liquidity and access offset accounts to reduce the interest charged without locking away cash. These features matter when your income or circumstances change or when you want to use equity in one property to fund another purchase.

A fixed interest rate provides certainty over repayments for a set period, usually between one and five years, but removes flexibility. Break costs apply if you want to exit the loan early, refinance or pay down the loan faster than the contract allows. For investors holding property long term and planning to keep the loan structure unchanged, a fixed rate can provide budgeting certainty, particularly if you are concerned about rate rises.

Some investors split their loan between variable and fixed, which provides partial rate protection while keeping some flexibility intact. The split depends on how much cash flow certainty you need and whether you expect to refinance or leverage equity within the fixed period.

Deposit and Loan to Value Ratio Requirements

Most lenders require a larger deposit for an investment property than for an owner-occupied home. The standard maximum loan to value ratio for an investment loan is 90 per cent, meaning you need at least a 10 per cent deposit plus costs. However, borrowing above 80 per cent LVR triggers Lenders Mortgage Insurance, which is a one-off premium added to your loan or paid upfront. LMI protects the lender if you default, and the cost increases sharply as the LVR rises.

At 85 per cent LVR on a $500,000 loan, LMI might add $8,000 to $12,000 to your upfront costs. At 90 per cent LVR, that figure could climb closer to $18,000 to $25,000. The premium is not refundable and does not reduce if you pay the loan down quickly. Some lenders also limit the loan amount they will lend at higher LVRs, particularly for investment purposes, or apply stricter serviceability rules.

If you own property already, you may be able to use the equity in that property as your deposit rather than providing cash. Equity release involves refinancing your existing loan and borrowing against the increased value of the property, then using those funds as the deposit on the new investment. This approach lets you enter the market without needing to save a separate cash deposit, but it increases your total borrowing and must still meet the lender's serviceability requirements.

Tax Benefits and Claimable Expenses

The interest you pay on an investment loan is deductible against the rental income you earn, provided the property is rented or genuinely available for rent. Other holding costs are also claimable, including council rates, insurance, property management fees, body corporate fees if applicable, repairs and maintenance, and depreciation on the building and fixtures.

Under current tax rules, if your claimable expenses exceed your rental income, the loss can be offset against your other income, such as your salary. This is known as negative gearing, and it reduces your taxable income each year. For properties purchased before the tax law changes that apply from the 2027-28 income year, negative gearing continues without restriction. Properties acquired after that date, unless they are new builds, are subject to changed rules where losses can only be offset against other residential property income, not salary or wages.

In our experience, buyers underestimate how much the tax deductions reduce the actual cost of holding an investment property. A property that costs $4,000 per year out of pocket after rent may return $1,500 to $2,000 in tax savings, depending on your marginal rate. That difference makes properties with modest negative cash flow viable as part of a long-term wealth strategy.

Refinancing an Investment Loan to Access Better Rates

Investment loan refinance is common once the property has been held for a few years and equity has increased. Refinancing can provide access to a lower interest rate, release equity for another purchase or switch loan features such as moving from interest only to principal and interest or vice versa.

Lenders reassess your income and serviceability when you refinance, so your borrowing capacity may differ from when you first took out the loan. Rate discounts are often better for new customers than existing ones, which is why switching lenders can reduce your repayments even if the advertised rates look similar. Refinancing costs include discharge fees from your current lender, application fees for the new lender and valuation costs, but these are often outweighed by the interest saved over time.

Refinancing also matters if your current loan does not have the features you need. If you initially chose a loan without an offset account or redraw and now want those features, refinancing is the way to access them. If you are planning to buy a second investment property and need to free up equity from the first, refinancing both loans together can improve your overall structure and borrowing position.

Your property investment strategy is only as strong as the loan structure supporting it. The right investment loan options, paired with a clear view of your cash flow, deposit position and borrowing capacity, gives you the ability to move when the right property appears. Call one of our team or book an appointment at a time that works for you.

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