What Are the Numbers Before You Buy an Investment Property

Most investors start with the property, then work backwards to the loan. That sequence costs them equity, cash flow and time.

The property you select determines your borrowing capacity, your deposit structure, your loan features and ultimately your portfolio growth trajectory. A unit in Southport and a house in Burleigh Heads might both list at similar prices, but the loan you can access, the deposit you need and the cash flow you generate will differ substantially. Understanding those differences before you start searching keeps you focused on properties that build wealth rather than consume it.

What Makes a Property Bankable for Lenders

A bankable property meets lender serviceability and security criteria without requiring premium pricing or LMI at inflated rates. Lenders assess investment properties based on location, dwelling type, rental yield, presale percentage if off-the-plan, and whether the property is considered standard or non-standard under APS 112.

Consider a buyer looking at a two-bedroom apartment in Surfers Paradise. The building has high owner-occupier density, established body corporate records and sits within 800 metres of light rail and beachfront amenity. Rental appraisal sits at $650 per week, and comparable sales over the prior six months show consistent turnover. The lender applies an 80 per cent LVR without LMI, accepts rental income at 80 per cent of the appraisal figure for serviceability, and offers access to offset and redraw features on both variable and fixed rate products. The same buyer then considers a one-bedroom apartment in the same precinct, in a building with 70 per cent investor ownership and a short rental history. The lender reduces the maximum LVR to 70 per cent, applies a higher interest rate and declines offset functionality. The difference is not the buyer's financial position but the property's risk profile.

When you are reviewing properties, ask your broker to run a preliminary lender assessment on the address or building before you make an offer. That conversation takes ten minutes and can save you weeks of wasted due diligence on a property that will not deliver the loan structure you need. You will find more detail on structuring your borrowing in our article on investment loans.

How Rental Income Affects Your Borrowing Power

Lenders include rental income in your serviceability calculation, but they do not count the full amount. Most lenders apply a shading rate of 80 per cent to account for vacancy, management fees and holding periods between tenants. Some lenders reduce this further to 75 per cent depending on location or dwelling type.

If a property generates $600 per week in rent, the lender includes $480 per week in your income assessment after applying an 80 per cent shading rate. That additional income improves your debt-to-income ratio and increases the loan amount you can service. However, the improvement only holds if the rental appraisal is supported by comparable leases in the same building or precinct. Optimistic appraisals provided by a selling agent do not carry weight with lenders.

The Gold Coast rental market varies significantly by precinct. Properties close to Griffith University, Gold Coast University Hospital and the light rail corridor in Southport consistently achieve lower vacancy periods than properties in outer precincts with limited transport links. A property that rents quickly and holds tenants reduces your holding costs and stabilises your cash flow, which matters more than a slightly higher weekly rent that comes with longer vacancy periods.

You also need to account for body corporate fees, council rates, insurance and property management fees when calculating your net position. A property generating $650 per week with $8,000 annual body corporate fees delivers a different outcome to a property generating $600 per week with $3,000 annual fees. Your broker should walk through both the lender's serviceability view and your actual cash flow position before you commit.

Interest Only or Principal and Interest for Investment Loans

Interest-only repayments reduce your monthly outgoings and preserve cash flow, which allows you to hold multiple properties or reinvest surplus income into offset accounts or other assets. Principal and interest repayments build equity faster and reduce your loan balance over time, which improves your borrowing position for subsequent purchases.

Neither structure is inherently superior. The right choice depends on your income level, your tax position, your portfolio goals and how quickly you intend to acquire additional properties. Investors with high marginal tax rates and plans to acquire multiple properties within a short timeframe often favour interest-only loans to maximise deductions and preserve liquidity. Investors focused on reducing debt and building unencumbered equity typically choose principal and interest from the outset.

Under APS 112, a residential investment loan with an interest-only period exceeding five years and an LVR above 80 per cent is classified as non-standard, which attracts higher risk weighting and typically higher pricing from the lender. Most lenders offer interest-only periods of one to five years on investment loans, after which the loan reverts to principal and interest unless you apply for an extension. Extensions are not automatic and depend on your serviceability and the lender's current appetite for interest-only lending.

You can switch between interest-only and principal and interest during the life of the loan, subject to lender approval. That flexibility allows you to adapt your repayment structure as your income, tax position and portfolio evolve. If you are planning to use equity from one property to fund deposits on subsequent purchases, an interest-only structure in the early years keeps your serviceability buffer open. Once your portfolio is established, you can switch to principal and interest to accelerate debt reduction. Your broker should model both scenarios with actual interest rates and fees before you make a decision, and you can explore portfolio growth strategies further in our article on expanding your property portfolio.

Fixed Rate or Variable Rate for Investment Property

Variable rate loans allow you to access offset accounts, make unlimited additional repayments without penalty, and benefit from rate cuts when they occur. Fixed rate loans lock in your repayment amount for a set period, which provides certainty for budgeting but typically restricts additional repayments and does not offer offset functionality.

Investors who prioritise flexibility and intend to use offset accounts to manage tax deductions typically favour variable rates. Investors who want repayment certainty or expect rates to rise may choose a fixed rate for part or all of the loan amount. A split structure, where part of the loan is fixed and part is variable, allows you to retain some offset and redraw functionality while locking in a portion of your repayments.

Fixed rates come with break costs if you repay the loan or refinance before the fixed period ends. Those costs can be substantial if rates have fallen since you fixed. Variable rates allow you to refinance or sell the property without penalty, which matters if your portfolio strategy involves short hold periods or opportunistic sales. You can read more about the mechanics of fixed rate break costs and refinancing in our article on refinancing your investment property.

Rate discounts on investment loans are generally smaller than those available on owner-occupier loans, and the gap between advertised rates and the rate you actually receive can be significant. Lenders price investment loans based on LVR, loan amount, property type and your overall borrowing profile. A borrower with a 70 per cent LVR and strong serviceability may receive a discount of 0.80 per cent to 1.00 per cent below the lender's published investment loan rate. A borrower at 90 per cent LVR with tight serviceability may receive no discount at all and may be charged a premium above the standard rate.

Loan to Value Ratio and Lenders Mortgage Insurance

LVR is the loan amount expressed as a percentage of the property's value. An LVR of 80 per cent means you are borrowing 80 per cent of the property's value and contributing a 20 per cent deposit plus costs. Most lenders require LMI on investment loans where the LVR exceeds 80 per cent.

LMI protects the lender, not the borrower, but the borrower pays the premium. The premium is calculated based on the loan amount and LVR, and it increases sharply as LVR rises. On an investment loan, LMI at 85 per cent LVR might add $8,000 to your upfront costs. At 90 per cent LVR, the same loan might attract $18,000 in LMI. The premium can be capitalised into the loan amount, but that increases your borrowing and your ongoing repayments.

Some lenders will lend up to 95 per cent LVR on investment property if you have a strong income and employment history, but the LMI premium at that level is prohibitive for most investors. A more common approach is to use equity from an existing owner-occupied property or investment property to fund the deposit, which allows you to stay at or below 80 per cent LVR and avoid LMI altogether. Releasing equity from an existing property requires that property to be revalued and your serviceability to support the additional borrowing. Your broker can arrange a desktop valuation and provide a preliminary assessment of how much equity you can access before you start searching for the next property.

New Build or Established Property for Tax and Negative Gearing

From the 2027-28 income year, losses on established investment properties acquired after 12 May 2026 can only be offset against income from other residential properties, not against salary or wages. Losses on eligible new builds acquired after that date can still be offset against all income, including salary, under the grandfathering and new build exemption provisions of the Treasury Laws Amendment (Tax Reform No. 1) Act 2026.

An eligible new build is a dwelling constructed on previously vacant land or a dwelling that replaces an existing property where the number of dwellings increases. A knock-down rebuild that does not increase dwelling numbers does not qualify. A new build that has been occupied for more than 12 months before you purchase it also loses access to negative gearing for you as the subsequent investor.

For investors with high marginal tax rates and plans to negatively gear, purchasing an eligible new build after 12 May 2026 preserves the ability to offset losses against salary and wages. For investors who expect the property to be positively geared from the outset, or who are holding for capital growth rather than tax deductions, the distinction is less relevant. Your accountant should model the difference in after-tax cash flow based on your specific income, deductions and holding period before you decide between new and established stock.

Capital gains tax treatment has also changed. From 1 July 2027, gains on investment properties are taxed using cost base indexation and a 30 per cent minimum tax rate, replacing the 50 per cent CGT discount for gains accruing after that date. For eligible new builds, you can choose between the indexed method and the 50 per cent discount at the time of disposal, which provides flexibility depending on inflation and your marginal tax rate at the time of sale.

What Happens When You Already Own Property

If you already own property, either as an owner-occupier or an existing investment, your borrowing capacity for the next purchase is affected by your existing loan commitments, your available equity and your overall debt-to-income ratio. Lenders assess your total debt position, not each loan in isolation.

APRA activated a debt-to-income lending limit on 1 February 2026. Each lender can lend up to 20 per cent of new investment loans to borrowers with a total DTI ratio of six times or greater. If your total borrowings across all properties exceed six times your gross annual income, you may still be approved, but you will fall within the lender's 20 per cent cap, which means pricing may be less competitive and approval may take longer. Some lenders will decline applications above six times DTI regardless of serviceability.

Equity release allows you to use the increased value of an existing property to fund the deposit on your next purchase without selling. If your owner-occupied property has increased in value and your loan balance has reduced, you may be able to borrow against that equity while keeping your overall LVR at or below 80 per cent. The released equity can be used for the deposit and costs on the investment property, which means you do not need to save a separate cash deposit. Your broker should model the combined LVR position across both properties and confirm your serviceability before you make an offer on the investment property. You can explore equity strategies further in our article on buying your first investment property.

Selecting Property That Fits Your Loan Structure

The property you select should align with the loan structure you need, not the other way around. If you require offset functionality to manage tax deductions, avoid properties or lenders that restrict offset on investment loans. If you need to borrow at 80 per cent LVR to avoid LMI, avoid properties in buildings or locations where lenders cap LVR at 70 per cent.

Gold Coast precincts vary in lender appetite. Broadbeach, Burleigh Heads, Mermaid Beach and parts of Southport close to the hospital and university are considered core investment locations by most lenders, which translates to higher maximum LVRs, better rate discounts and broader product choice. Outer precincts with limited amenity, high investor concentration or oversupply concerns may be subject to postcode restrictions or reduced LVRs by certain lenders. Your broker has access to lender policy guides that list specific postcode and building restrictions, and checking those before you start searching keeps you focused on properties that will deliver the funding you need.

Your loan structure should also reflect your timeline for acquiring additional properties. If you intend to build a portfolio of three to five properties over the next five to seven years, preserving serviceability and liquidity is more important than minimising your interest rate today. If you are acquiring a single investment property as a long-term hold with no plans for further purchases, you can prioritise rate and repayment structure over flexibility.

Call one of our team or book an appointment at a time that works for you. We work with investors across the Gold Coast who are building portfolios that deliver passive income, capital growth and long-term financial freedom. We will walk through your current position, your goals and the properties you are considering, and we will structure your borrowing to support your strategy rather than limit it.

Frequently Asked Questions