Understanding the Basics of Investment Property Deposits

How Much Deposit Do You Need for an Investment Property?

Most lenders require a minimum 20 per cent deposit for an investment property loan. This threshold means you avoid paying Lenders Mortgage Insurance and gives you access to better interest rates and more flexible loan features. If you have less than 20 per cent, you can still borrow, but you will pay LMI and face stricter serviceability tests.

Consider a buyer looking to purchase a two-bedroom apartment in central Doncaster as a rental property. With a 20 per cent deposit, they can negotiate sharper variable interest rates and secure access to offset accounts or redraw facilities. The same buyer offering a 10 per cent deposit might pay an additional $8,000 to $12,000 in LMI on a typical apartment price in the area, and face a smaller pool of willing lenders.

The gap matters because it shapes the entire structure of your loan. A higher deposit gives you stronger negotiating power with lenders and sets the foundation for better cash flow and lower holding costs once the property is tenanted.

Where Your Deposit Can Come From

You can use genuine savings, equity from an existing property, or a combination of both to meet the deposit requirement. Genuine savings are funds you have accumulated over time in accessible accounts such as savings accounts, term deposits, or shares. Equity is the difference between what your home is worth and what you owe on it, and you can leverage that difference to fund your investment deposit without selling.

In our experience, many Doncaster buyers use equity from their owner-occupied home in Doncaster East, Templestowe, or Box Hill North to purchase their first investment property. The lender places a second mortgage over your home to access that equity, and you typically need to keep at least 20 per cent equity in your home after the refinance. This approach lets you enter the investment market without waiting years to save cash, though it does increase the total debt against your home.

If you are relying on genuine savings, lenders want to see that money sitting in your account for at least three months. A sudden deposit the week before you apply will trigger questions about whether it is a gift, a loan from family, or borrowed funds. Gifted deposits are usually acceptable if they come with a signed declaration from the donor confirming the money does not need to be repaid, but rules vary by lender.

How Lenders Assess Your Investment Loan Application

Lenders calculate your borrowing capacity by adding your salary and other income, then deducting living expenses and any existing debts. For an investment property, they also factor in the expected rental income, but they do not count all of it. Most lenders apply a shading factor of 70 to 80 per cent, meaning only that portion of the rent is included in your income assessment.

Serviceability is tightened further by the buffer. Lenders assess your ability to repay at a rate three percentage points above the actual product rate, so if the variable interest rate is 6.5 per cent, the lender tests your repayments as if the rate were 9.5 per cent. This buffer protects both you and the lender against rate rises, but it reduces the loan amount you can access compared to what you might calculate using the current rate alone.

The debt-to-income cap introduced in February means lenders can only write a limited portion of their new investor loans to borrowers with total debt more than six times their gross income. If you earn $120,000 a year and already have $600,000 in home debt, adding a $400,000 investment loan would push your total debt to $1,000,000, or 8.3 times your income. Some lenders will still approve this, but you will compete for a spot within their capped allocation, and they may price the loan less competitively or ask for a larger deposit.

Using Equity to Build a Property Portfolio

Equity release works by refinancing your existing home loan to unlock the value that has built up over time. If your Doncaster home is valued at $1,200,000 and you owe $600,000, you have $600,000 in equity. A lender will let you borrow against up to 80 per cent of the property value, which is $960,000, leaving you with $360,000 in usable equity after keeping the existing $600,000 loan intact.

That $360,000 can cover a 20 per cent deposit on a property valued around $1,800,000, or fund two smaller purchases if your borrowing capacity supports the repayments. The key constraint is not the equity itself but your ability to service the combined loans. Lenders will assess whether your income can cover repayments on both your home and the new investment property at the buffered rate, and whether you fall within the debt-to-income settings.

We regularly see clients in Doncaster leverage equity from a family home purchased years ago to acquire an apartment in Doncaster or a nearby suburb such as Balwyn North or Templestome Lower. The rental income helps cover the interest on the investment loan, and the offset account linked to their home loan continues to reduce interest on the non-deductible debt. This structure separates deductible investment interest from non-deductible home loan interest, which is important for managing your tax position and keeping your accounts clear for the ATO.

Loan to Value Ratio and Why It Shapes Your Rate

Loan to value ratio measures how much you are borrowing relative to the property value. If you borrow $400,000 to buy a $500,000 property, your LVR is 80 per cent. The lower your LVR, the less risk the lender takes on, and the better the interest rate and loan features you can access.

An LVR above 80 per cent means you will pay Lenders Mortgage Insurance. This is a one-off premium that protects the lender if you default, and it can range from a few thousand dollars to more than $20,000 depending on the loan amount and your deposit size. Paying LMI does not give you any benefit as the borrower, and it is not refundable even if you pay down the loan or refinance within a few months.

Staying at or below 80 per cent LVR also gives you access to a wider choice of investment loan products. Some lenders will not lend above 80 per cent for investment purposes at all, and others will charge a higher variable interest rate or restrict features such as offset accounts or interest-only periods. If you are close to the 80 per cent threshold, it is worth considering whether a smaller loan amount or a less expensive property lets you stay under that line.

Interest Only Repayments and Cash Flow for Investors

Most investors choose an interest-only period for the first one to five years of the loan. This means your repayments cover only the interest charged each month, and the loan balance does not reduce. The advantage is lower monthly repayments, which improves your cash flow and lets you direct surplus income toward paying down non-deductible debt such as your home loan, or building a buffer for vacancies and maintenance.

Consider a buyer who purchases a townhouse in Doncaster as an investment property. On a $500,000 loan at current variable rates, principal and interest repayments might be around $3,400 per month, while interest-only repayments sit closer to $2,600. If the property rents for $2,400 per month, the investor is negatively geared by $1,000 per month on principal and interest, but only $200 per month on interest only. The $800 difference can be used to pay down the home loan or kept in an offset account linked to the investment loan to reduce the interest charged.

Interest-only is not suitable for everyone. If your goal is to pay down debt quickly or you expect your income to drop in coming years, principal and interest from the start might suit your circumstances better. The choice depends on your broader property investment strategy, your tax position, and how you plan to manage cash flow across your home loans and investment borrowing.

Tax Treatment Changes from July 2027

New federal rules take effect from 1 July 2027 that quarantine rental losses on most residential investment properties purchased after 12 May 2026. If you buy an investment property now or in the coming months, and it runs at a loss, you will no longer be able to offset that loss against your salary or other non-rental income from mid-2027 onward. Instead, the loss can only be used against future rental income or capital gains when you eventually sell the property.

Properties purchased before 7:30pm on 12 May 2026 are grandfathered and continue under the existing rules, meaning you can still claim rental losses against your wage income indefinitely. Eligible new builds, defined as dwellings constructed on previously vacant land or projects that increase the total number of dwellings, remain eligible for negative gearing under the old rules even if purchased after that date.

The change affects how you model the after-tax cost of holding an investment property. If you earn $120,000 and your investment property loses $10,000 a year after expenses, that loss currently reduces your taxable income to $110,000 and saves you around $3,700 in tax at the marginal rate. From July 2027, if your property was purchased after the cut-off, you carry that $10,000 loss forward instead. It still has value, but the benefit is deferred until you have rental income or a capital gain to offset it against.

Capital gains tax rules also shift from July 2027. The 50 per cent discount is replaced with cost base indexation and a 30 per cent minimum tax rate on real gains, though gains accrued before that date remain under the current rules. Eligible new builds let you choose between the two methods. The mechanics are complex and depend on how long you hold the property, inflation over that period, and your marginal tax rate at the time of sale. These rules are still being interpreted by advisers and the ATO, so it is worth speaking to a tax specialist before you commit to a purchase if timing puts you close to the transition dates.

Choosing the Right Loan Structure for Your Circumstances

The most useful loan structure separates your investment borrowing from your home loan and keeps each purpose clear. This is not just about tax compliance, it also makes refinancing simpler and gives you flexibility to adjust one loan without disturbing the other.

If you are using equity from your home to fund the investment deposit, you will typically have two loans secured against your home and one loan secured against the investment property. The first loan is your original home loan, the second is the equity release portion used for the investment deposit, and the third is the loan secured by the investment property itself. The second and third loans are both deductible because they are used to acquire an income-producing asset, while the first loan remains non-deductible because it relates to your home.

An offset account linked to your home loan reduces the interest you pay on that non-deductible debt, while the investment loans remain separate and accumulate deductible interest. This structure maximises your tax deductions and keeps your non-deductible debt as low as possible over time. Some investors make the mistake of redrawing from their home loan to pay investment expenses or deposit, which mixes the two purposes and creates a mess for the ATO and your accountant. Setting the structure correctly from the start avoids that problem.

Your borrowing capacity will determine the maximum loan amount you can access, but the structure you choose determines how efficiently you manage that debt over the long term. If you plan to grow a portfolio of multiple investment properties, getting the structure right on the first purchase makes the second and third acquisitions much easier to fund and manage.

What Lenders Look for Beyond the Deposit

A sufficient deposit is the entry point, but lenders also assess your credit history, employment stability, existing debts, and the property itself. If you have defaults, late payments, or multiple credit enquiries in the past 12 months, your application will be reviewed more carefully and you may be offered a higher rate or asked for a larger deposit.

Lenders also assess the property as security. Apartments in Doncaster are generally well accepted by most lenders, but high-rise buildings with more than three levels, small studios under 50 square metres, or properties in developments with unsold stock can trigger serviceability overlays or valuation discounts. The lender orders a valuation, and if it comes in below the purchase price, you will need to make up the difference with additional deposit or renegotiate the sale price.

If the property has a high body corporate fee or if comparable rentals in the area show a high vacancy rate, the lender may reduce the amount of rental income they credit in your serviceability assessment. Doncaster has strong rental demand due to proximity to Westfield, the Eastern Freeway, and Box Hill Hospital, but individual properties vary. A two-bedroom apartment close to Doncaster Road and the Manningham Council precinct will generally achieve stronger rental returns and lower vacancy risk than a similar unit further from transport and shops.

Your investment loan application is assessed on all these factors together, not just the deposit in isolation. Having 20 per cent saved or available in equity is the baseline, but your income, your debts, your credit file, and the property you are buying all shape the final loan amount and interest rate the lender offers.

Call one of our team or book an appointment at a time that works for you. We work with clients across Doncaster and the eastern suburbs to structure investment loans that suit your circumstances and set you up for long-term portfolio growth.

Frequently Asked Questions