One of the most common ways Australians buy their first — or next — investment property is not by saving a fresh deposit, but by tapping the equity they have already built in their own home. If your property has grown in value and you have paid down some of your loan, that equity can become the deposit for an investment purchase. Used carefully, it is one of the most efficient tools in property investing. Used carelessly, it stretches you thin. Here is how it actually works.
What "usable equity" really means
Equity is simply the difference between what your home is worth and what you still owe on it. But not all of that equity is accessible. Lenders will generally let you borrow against your home up to around 80% of its value before Lenders Mortgage Insurance comes into play.
So your usable equity is roughly 80% of your home's current value, minus the balance still owing on your loan. The gap between your current loan and that 80% ceiling is what you can typically release.
A simple worked example
Say your home is worth $1,000,000 and you owe $400,000.
- 80% of $1,000,000 is $800,000
- Minus your $400,000 loan leaves $400,000 of usable equity
That $400,000 could fund the deposit and purchase costs on an investment property — often enough to buy without contributing any cash of your own. In practice, lenders assess the whole picture, so the figure you can actually access depends on your income and serviceability, not just the equity maths.
How the loan is usually structured
The cleaner approach is to set up a separate loan split secured against your home for the deposit and costs, then take out a standalone loan for the investment property itself. This keeps the two properties from being tangled together — what brokers call avoiding unnecessary cross-collateralisation — and gives you more flexibility to sell or refinance one property later without disturbing the other.
It also keeps your investment borrowing cleanly identifiable, which matters at tax time. Your accountant will thank you for a structure where the deductible investment debt is separate from your non-deductible home debt.
The risks worth respecting
Using equity means taking on more debt secured against the home you live in. That is not a reason to avoid it — most successful property investors do exactly this — but it is a reason to plan it properly:
- Serviceability: you still need the income to comfortably carry both loans, assessed at the lender's buffer rate, not just today's rate
- Market movement: property values can fall as well as rise, and a higher combined loan reduces your margin
- Buffers: sensible investors keep a cash or redraw buffer for vacancies, rate rises and repairs
The practical steps
- Get a realistic estimate of your home's current value
- Work out your usable equity against the 80% ceiling
- Confirm your borrowing capacity across both loans
- Structure the equity release as a separate split, kept distinct from your home loan
- Identify the right investment property for your strategy and budget
- Proceed to formal approval and settlement
If you'd like to map your numbers
Whether equity release is the right move depends on your goals, your income, and the kind of property you want to hold. We work with property investors every week to model exactly this — what is accessible, what is serviceable, and how to structure it so your next purchase does not compromise your home.
Book a strategy call and we will run your specific numbers together, and be straight with you about whether now is the right time to move.
