The Easiest Way to Fund an Investment Property Deposit

What Deposit Do You Need for an Investment Property?

Most lenders require a minimum 10 per cent deposit for an investment property, though a 20 per cent deposit helps you avoid Lenders Mortgage Insurance and access better rates. The deposit must be in genuine savings or equity, and lenders will verify the source of every dollar before approving your application.

A borrower looking to purchase a rental property will typically need to demonstrate the deposit has been held for at least three months, though exceptions exist for equity release, gifts from immediate family, and proceeds from the sale of another asset. Lenders apply a stricter assessment to investor deposits than they do for owner-occupiers because the loan carries additional risk.

Milton sits within one of Brisbane's inner-city rental belts, with demand driven by young professionals working in the CBD and students attending the University of Queensland. Property options in the suburb range from renovated workers' cottages to modern townhouses and apartment complexes along Park Road and Cribb Street. Vacancy rates in the 4064 postcode have remained under 2 per cent over the past two years, which supports rental yield but also means purchase prices reflect investor appetite.

How the 20 Per Cent Threshold Changes Your Loan

Staying at or above a 20 per cent deposit removes the need for Lenders Mortgage Insurance, which can add thousands of dollars to your upfront costs. At an 80 per cent loan to value ratio, you also unlock lower interest rates and access to a wider range of investment loan products.

Consider an investor who identifies a two-bedroom unit near the Milton train station. With a 20 per cent deposit and the rental income assessed at 80 per cent by the lender, the borrower's serviceability is stronger and the loan structure more flexible. Most lenders will allow interest only repayments without additional pricing, and offset accounts are typically available at no extra cost. Drop below 20 per cent and those features either disappear or come with a higher rate.

LMI premiums are calculated on a sliding scale based on your loan to value ratio. At 85 per cent LVR, the premium might add $8,000 to $12,000 depending on the loan amount. At 90 per cent, it can double. Some lenders will capitalise the premium into the loan, but that increases your borrowing and reduces the equity buffer you need for future portfolio growth.

Using Equity from Your Home to Fund the Deposit

If you already own property, you can access equity to fund the deposit on your investment without selling or withdrawing cash savings. Lenders will allow you to borrow up to 80 per cent of your home's value in most cases, leaving the remaining 20 per cent as your equity buffer.

In practice, an owner-occupier in Milton with a property valued at $900,000 and a remaining mortgage of $400,000 has $320,000 in accessible equity at 80 per cent LVR. That figure is calculated by taking 80 per cent of the property value, then subtracting the existing loan. The borrower can use that equity as the deposit and cover costs for the investment purchase, though the lender will still assess whether the new combined debt is serviceable under current income and expense settings.

Refinancing your existing home loan to access equity is a common approach, particularly if your current lender does not offer competitive investor rates or will not increase your facility. Moving to a new lender allows you to consolidate the equity release and the new investment loan under one application, which can save time and reduce the number of valuations required.

What the Debt-to-Income Cap Means for Investors

From 1 February 2026, lenders have been required to limit the proportion of new investor loans written at a debt-to-income ratio of six times or higher to 20 per cent of their investor portfolio. If your total borrowing exceeds six times your gross annual income, you may find fewer lenders willing to approve your application, or you may need a larger deposit to bring the ratio down.

An investor earning $120,000 per year can borrow up to $720,000 before hitting the six times threshold. If the new investment loan pushes total debt beyond that figure, some lenders will decline the application outright while others will require a higher deposit or evidence of additional income such as rental income from other properties. The cap applies separately to investor and owner-occupier loans, so your existing home loan is included in the calculation if it is being refinanced or increased.

This measure was introduced by APRA to manage household debt levels and reduce the risk of borrowers overextending. For investors in Milton looking to build a portfolio, it reinforces the importance of planning each purchase with serviceability in mind rather than focusing only on deposit size.

How Negative Gearing Rules Affect Deposit Planning

Under changes introduced in the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, properties acquired after 7:30pm AEST on 12 May 2026 will be subject to quarantined negative gearing from 1 July 2027 unless they qualify as eligible new builds. Rental losses on affected properties can only be offset against other residential rental income, not against salary or wages.

This change has implications for how much deposit you should contribute. A higher deposit reduces your loan amount and therefore your interest expense, which in turn reduces the size of any rental loss. If you cannot offset that loss against your employment income, the value of borrowing at a high LVR is diminished. Investors who were previously comfortable with a 10 per cent deposit and a large negative gearing benefit may now find a 20 or 25 per cent deposit more attractive from a cash flow perspective.

Eligible new builds retain full negative gearing and access to the 50 per cent capital gains tax discount, which makes them more appealing for investors with limited deposit funds who still want access to tax deductions. However, new builds in Milton are limited, and most available stock consists of established apartments and renovated character homes.

Structuring the Loan to Protect Your Deposit

Once the deposit is confirmed, your investment loan structure will determine how efficiently you can deploy that capital. Most investors choose interest only repayments for the first one to five years to maximise cash flow, particularly if the property is negatively geared.

An offset account linked to the investment loan allows you to park surplus cash and reduce the interest charged without making additional repayments. If the loan is on a variable rate, the offset will reduce your interest daily. If you have a fixed rate, check whether an offset is available, as many lenders remove this feature on fixed rate investment loans.

Split rate structures are common, with part of the loan fixed to provide certainty and the remainder on a variable rate with an offset account. This approach protects you from rate rises on a portion of the debt while maintaining flexibility to pay down the variable portion or access redraw if needed. The deposit you contribute does not change, but the loan structure can materially affect your cash flow over the life of the investment.

Calculating Borrowing Capacity Before Committing Funds

Before you commit a deposit or enter a purchase contract, confirm your borrowing capacity with a broker or lender. Serviceability is calculated using your income, expenses, existing debts, and the rental income from the property, which is typically assessed at 80 per cent of the market rent to account for vacancy and management costs.

Lenders apply a serviceability buffer of 3 percentage points above the loan's interest rate, meaning your income must support repayments at a rate higher than what you will actually pay. If you are borrowing at a variable rate of 6.3 per cent, the lender will assess serviceability at 9.3 per cent. This buffer can reduce your maximum loan amount by 15 to 20 per cent compared to what you might calculate using the actual rate.

If your borrowing capacity falls short, you have three options: increase your deposit to reduce the loan amount, reduce discretionary expenses to improve serviceability, or add a co-borrower. Each option has different implications for your tax position and ownership structure, so seek advice before proceeding.

What Happens If You Purchase Before Settlement on Your Home

Bridging finance is sometimes used when an investor wants to purchase an investment property before settling on the sale of an existing home or before equity can be formally accessed. The bridge allows you to borrow against the expected proceeds or equity, with the loan discharged once the sale completes or the refinance settles.

Bridging finance typically carries a higher interest rate than a standard investment loan and requires an end-debt position that is serviceable without the bridge in place. Lenders will assess the sale contract or valuation of the property being sold, and they will usually lend up to 80 per cent of that value as part of the bridge. The deposit for the investment property is effectively funded by the bridge, and you will need to demonstrate that the end position, once the bridge is repaid, meets the lender's credit policy.

This structure is more commonly used by investors with multiple properties or those moving quickly in a rising market. It is not suitable for every borrower, and the costs can erode the benefit if the bridge remains in place for more than a few months.

When to Speak to a Broker About Your Deposit

Talk to a broker before you start searching for a property, not after you have signed a contract. A broker can confirm your borrowing capacity, identify lenders that suit your deposit size and employment type, and structure the loan to align with your tax and cash flow objectives. Different lenders have different credit policies, and some will accept a 10 per cent deposit with LMI while others require 20 per cent for any investment lending.

If you are using equity, the broker will arrange a valuation of your existing property and confirm the amount available for release. If you are relying on genuine savings, the broker will review your bank statements and verify that the funds meet the lender's requirements. If there are any issues with your deposit source or serviceability, it is far easier to address them before you commit to a purchase than during a 30-day settlement period.

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Frequently Asked Questions