How to Use Your Home Equity to Buy an Investment Property in Perth

Perth's property market has done something remarkable over the past few years. Median house prices have risen more than 60% since 2022 — and for homeowners who bought before that run, the result is a significant amount of wealth sitting in their property that they may not have thought much about.

That wealth is called equity. And for the right person in the right situation, it can be the springboard for building a property portfolio without needing to save a new deposit from scratch.

This guide explains how equity works, how much of it you can realistically access, what using it to buy an investment property actually looks like in practice, and the risks you need to understand before you proceed.

What Is Home Equity, and How Much Do You Have?

Equity is the difference between what your property is currently worth and what you still owe on your mortgage.

If your Perth home is currently valued at $850,000 and your remaining loan balance is $420,000, your total equity is $430,000. But that doesn't mean you can access all of it.

Lenders will typically allow you to borrow against your property up to 80% of its current value without requiring Lenders Mortgage Insurance. The portion of equity available to you — called your usable equity — is calculated like this:

Property value × 80%, minus your existing loan balance.

Using the example above: $850,000 × 80% = $680,000. Minus $420,000 owing = $260,000 in usable equity.

That $260,000 is what you can potentially access to use as a deposit and cover purchasing costs on an investment property. Some lenders will allow you to go above 80% loan-to-value ratio with LMI, but most experienced investors avoid this because it adds cost and increases risk.

Why Perth Equity Is Particularly Powerful Right Now

The scale of Perth's price growth means that homeowners who bought even four or five years ago are sitting on equity positions they probably didn't plan for. A home purchased for $550,000 in 2020 is, in many suburbs, worth $800,000 to $900,000 today.

That kind of growth, combined with five years of mortgage repayments reducing the loan balance, means some Perth homeowners have $300,000 or more in usable equity — enough to fund the deposit and costs on a $600,000 to $700,000 investment property.

The WA rental market is also running hot. Vacancy rates across Perth have been below 1% for an extended period, median rents have increased significantly, and rental yields on investment properties are among the strongest of any capital city in Australia. For investors who get the finance structure right, the rental income from a Perth investment property can cover a meaningful portion of the loan repayments.

How the Process Actually Works

Using equity to buy an investment property involves two key steps: accessing the equity from your existing property, and then using it as a deposit on the new one.

Step 1 — Equity release. You work with a lender (ideally through a broker) to refinance your existing home loan or add a line of credit against your property. The lender will require a current valuation of your home and will assess your income and liabilities to confirm you can service the increased debt. If approved, the equity is made available as accessible funds — either drawn down as a lump sum or held as a redraw or line of credit facility.

Step 2 — Investment loan application. With your equity funds available, you use them as the deposit on the investment property and apply for a separate investment loan to cover the remainder of the purchase price. The investment loan is assessed on your income, existing commitments, and the projected rental income from the property.

One important point: these are two separate loans, secured against two separate properties. This is called a standalone loan structure, and it's generally preferable to cross-collateralisation — where both properties are used as security for a single loan. Most experienced property investors avoid cross-collateralisation because it gives the lender more control over both assets and makes it harder to sell one property independently later.

A broker who specialises in investment lending will set this up correctly from the start.

Loan Structuring for Investment Properties — What Actually Matters

The way your investment loan is structured affects both your cash flow and your tax position. These are the key decisions you'll make with your broker.

Interest-only vs principal and interest. Many property investors choose interest-only repayments on their investment loan, at least in the early years. This reduces the monthly repayment amount and preserves cash flow, while the principal debt on your owner-occupied home (which is not tax-deductible) gets paid down faster. The interest on an investment loan is tax-deductible, which changes the net cost of interest-only repayments significantly. Your accountant and broker should work through this together.

Offset accounts. An offset account attached to your investment loan doesn't directly reduce the loan balance, but it reduces the interest charged each month. Money sitting in an offset account on an investment loan is effectively earning a tax-advantaged return at your loan's interest rate. This is a nuanced area — get advice specific to your situation.

Fixed vs variable rate. The rate environment affects this decision, but for investment properties the flexibility of a variable rate is often preferred by investors who anticipate selling, restructuring, or refinancing within a few years. Fixed rates eliminate this flexibility. Your broker will walk through the trade-offs based on your plans.

Borrowing in the right name. Whether you buy an investment property in your own name, jointly, or through a trust or company structure has significant tax and asset protection implications. This is a conversation for your accountant, but your broker needs to know the intended ownership structure before lodging a loan application.

How Much Can You Borrow for an Investment Property?

Your borrowing capacity for an investment property is assessed differently to an owner-occupied loan. Lenders apply what are called assessment rates — they test your ability to service the loan at a rate typically 2–3% above the actual rate — and they treat rental income conservatively, usually counting 70–80% of the projected rent rather than the full amount.

This means your borrowing capacity for an investment loan is often lower than people expect. If you already have a significant owner-occupied loan, your remaining capacity for investment debt may be more limited than the equity figure suggests.

Different lenders also assess investment borrowing capacity differently. Some are considerably more generous than others. This is exactly why using a broker is valuable for investment loans — a broker who works with multiple lenders can identify which one will lend you the most, under the best terms, for your specific situation.

Perth Suburbs Worth Watching in 2026

Without recommending specific properties — which is outside what a mortgage broker can do — there are patterns in the Perth market that investors consistently find attractive.

Middle-ring suburbs with established infrastructure, good school catchments, and access to employment corridors tend to deliver the most consistent long-term capital growth. Perth's middle ring — suburbs roughly 10–20km from the CBD — is where the most active investor activity has been concentrated.

For yield-focused investors, some outer suburbs and regional WA locations offer gross rental yields of 5–7%, which is exceptional by Australian standards. The trade-off is typically lower expected capital growth compared to inner-ring properties.

New builds in growth corridors offer depreciation benefits that established properties don't — the ability to claim building depreciation as a tax deduction can meaningfully improve the after-tax cash flow of a new investment property. Your accountant will prepare a depreciation schedule for you after purchase.

The Risks — Because They're Real

Using equity to invest accelerates your wealth-building potential, but it also accelerates your risk exposure. You need to go into this with clear eyes.

Increased debt. Accessing equity and buying an investment property means you're carrying more total debt than you were before. Your monthly obligations increase, and your buffer against unexpected expenses shrinks. You need to be confident that your income can comfortably service the combined debt before you proceed.

Vacancy risk. Even in a tight rental market, properties go vacant between tenants. Can you cover the investment property repayments for two or three months without rental income? If the answer is no, you may be overextending.

Interest rate risk. Both your home loan and your investment loan are exposed to rate movements. If rates rise significantly, your combined repayments increase. Run the numbers at a rate 1–2% higher than current to confirm you can still service the debt.

Property market risk. Perth has performed exceptionally well, but property markets move in cycles. Buying at the peak of a cycle and then seeing values fall doesn't necessarily mean disaster — as long as you can hold — but it can create psychological pressure and reduce your flexibility to sell if needed.

Liquidity risk. Property is not a liquid asset. If you need to access cash quickly, you can't sell half a house. Make sure you're maintaining adequate cash savings as a buffer separate from your equity position.

Getting the Structure Right from the Start

The difference between a well-structured investment property purchase and a poorly structured one can be tens of thousands of dollars in tax, cash flow, and borrowing capacity over the life of the investment. The decisions made at the beginning — which lender, which loan structure, interest-only or principal and interest, which ownership structure — are much harder to undo later.

A licensed mortgage broker who specialises in investment lending will set this up correctly from day one. They'll assess your current equity position, model your borrowing capacity across multiple lenders, structure the loans to maximise your flexibility and minimise your costs, and coordinate with your accountant on the tax implications.

Bridgeway Finance matches Perth property investors with exactly those brokers — for free. Submit your details, we'll call to understand your situation, and we'll introduce you to the right investment lending specialist within 24 hours.

No cost. No obligation. Just the right structure for your next property.