Investment Property Deposit Australia

The deposit is usually the single biggest barrier between wanting an investment property and actually owning one. It is also one of the most misunderstood parts of the process, because the “right” deposit amount depends on your financial position, your risk tolerance, and whether you already own property.

This article covers how much you actually need, what happens when you put down less than 20%, how equity in an existing property can replace a cash deposit, and practical strategies to get there faster. For the full buying process from pre-approval through to settlement, see our guide to buying an investment property in Australia.

The 20% Deposit Benchmark

The standard target for an investment property deposit in Australia is 20% of the purchase price. On a $700,000 property, that means $140,000 in cash or equivalent equity.

Why 20%? Because most lenders treat 80% as the maximum loan-to-value ratio (LVR) they will approve without requiring lenders mortgage insurance (LMI). Keep your LVR at or below 80%, and you avoid LMI entirely, access more competitive interest rates, and present a lower risk profile to the lender.

As outlined in our investment property buying guide, you also need to budget for stamp duty, legal fees, and a cash buffer on top of your deposit. On a $700,000 property in NSW, for example, transfer duty alone sits at approximately $26,069 according to Revenue NSW. So the total upfront cash requirement is meaningfully higher than just the deposit.

A rough rule: budget for 20% of the purchase price plus 5% to cover stamp duty, conveyancing, loan establishment fees, building and pest inspections, and a modest cash reserve.

Buying With Less Than 20%

A 20% deposit is the benchmark, not the floor. Some lenders will approve investment loans with deposits as low as 10%, and in limited cases, even less. The trade-off is lenders mortgage insurance.

What Is LMI?

LMI is a one-off insurance premium that protects the lender (not you) if you default on the loan. It applies when your LVR exceeds 80%, meaning your deposit is less than 20% of the property's value.

The cost of LMI scales with both the loan amount and the LVR. A higher LVR means a proportionally larger premium. On a $500,000 investment loan at 90% LVR, LMI can run into tens of thousands of dollars. Most borrowers choose to capitalise it into the loan, which means you pay interest on the LMI premium for the life of the mortgage.

Is It Worth Paying LMI?

That depends on the numbers. If property prices in your target market are rising faster than you can save, waiting another two or three years to hit 20% could cost you more in missed capital growth than the LMI premium itself. On the other hand, LMI is a sunk cost. You never get it back, it does not reduce your loan balance, and it does not build equity.

Run the numbers both ways before deciding. Factor in the LMI premium, the higher interest rate you may receive at a higher LVR, and the opportunity cost of waiting.

Using Equity Instead of Cash

If you already own a property, whether it is your home or another investment, you may not need a cash deposit at all. Lenders allow you to use the equity in your existing property as security for a new loan.

How Equity Works as a Deposit

Equity is the difference between your property's current market value and the amount you still owe on it. If your home is valued at $900,000 and your mortgage balance is $500,000, you have $400,000 in equity.

Not all of that equity is usable. Lenders typically let you access equity up to 80% of the property's value without triggering LMI. In this example, 80% of $900,000 is $720,000. Subtract your $500,000 mortgage, and you have $220,000 in usable equity. That is enough to cover a 20% deposit on a property worth up to $1,100,000, before accounting for purchase costs.

Cross-Collateralisation vs. a Separate Equity Release

There are two common ways to access equity for an investment property deposit.

Cross-collateralisation means the lender uses both properties as security for both loans. This ties your assets together. If you sell one property, the lender can reassess the remaining loan against the remaining security. It simplifies the initial setup but reduces flexibility down the track.

A separate equity release (sometimes called a “top-up” or a standalone line of credit) involves increasing the loan on your existing property and taking the released funds as cash for the new deposit. The two loans are independent. This approach keeps your properties separate from the lender's perspective, giving you more control if you want to sell, refinance, or switch lenders later.

Most brokers and financial advisors recommend the separate equity release for this reason.

Genuine Savings Requirements

Some lenders require your deposit to include “genuine savings,” meaning funds you have accumulated over time rather than received as a gift, inheritance, or windfall. The typical threshold is three months of consistent saving demonstrated through bank statements.

This matters because a lump sum that appeared in your account last week, even if it is legitimately yours, may not satisfy a lender's genuine savings policy. If you are planning to use gifted funds or a tax refund as part of your deposit, check your lender's policy early so you are not caught short at application stage.

Not all lenders have a genuine savings requirement. A mortgage broker can match you with lenders whose policies fit your deposit source.

Strategies to Reach Your Deposit Faster

1. Automate a Dedicated Savings Account

Open a high-interest savings account that you do not touch. Set up an automatic transfer on payday. Treat it like a fixed expense, not a discretionary one. Even $500 per week adds up to $26,000 in a year before interest.

2. Reduce Your Biggest Expenses Temporarily

Housing and transport are typically the two largest line items in any budget. If you can reduce your rent by moving to a cheaper suburb, sharing with a housemate, or negotiating a renewal, the savings compound quickly over 12 to 24 months.

3. Use Your Tax Return Strategically

If you already own an investment property, the tax deductions available to you — including depreciation, loan interest, and maintenance — can generate meaningful tax refunds. Direct those refunds straight into your deposit fund rather than absorbing them into general spending.

If you are considering negative gearing as part of your investment strategy, the tax benefits it generates can also accelerate your savings timeline.

4. Consider Rentvesting While You Save

Rentvesting lets you rent where you want to live while purchasing an investment property in a more affordable market. The lower purchase price means a smaller deposit target. A $500,000 property at 20% requires $100,000, compared to $150,000 for a $750,000 property.

5. Explore Guarantor Arrangements

A family member who owns property can act as guarantor by offering their equity as additional security for your loan. This can allow you to borrow up to 100% of the purchase price without paying LMI. The guarantor does not hand over cash. Their property sits as security until you have built enough equity to release them, usually when your LVR drops below 80%.

This is a significant commitment for the guarantor. If you default, the lender can pursue their property. Both parties should get independent legal and financial advice before entering a guarantor arrangement.

How Much Do You Actually Need? A Quick Reference

Here is what a 20% deposit looks like across different price points, before purchase costs:

Remember, these figures do not include stamp duty, legal fees, or other purchase costs. As noted in our buying guide, you should factor in stamp duty, legal fees, and a cash buffer for the first few months of ownership on top of the deposit itself.

What to Do Next

Your deposit strategy should match your financial position and timeline. If you already own property, get a current valuation to understand your usable equity. If you are saving from scratch, set a target based on the price range you are looking at and work backwards to a monthly savings figure.

A property investment coach can help you map out the most efficient path to your first or next investment property, whether that involves equity, cash savings, or a combination of both.