How to Use Equity to Buy Your Next Investment Property

Most first-time investors save a cash deposit for their first property. But experienced investors rarely save a second deposit from scratch. Instead, they use the equity that has built up in their existing property to fund the next purchase. This is how portfolios compound — and understanding the mechanics is essential for anyone serious about building wealth through property.

What Is Equity?

Equity is the difference between your property's current market value and the outstanding balance on your mortgage. If your property is worth $750,000 and you owe $480,000, you have $270,000 in equity.

Equity grows in two ways: as your property increases in value (capital growth), and as you pay down the loan balance (principal repayments). In most cases, capital growth is the larger contributor — which is why buying in markets with strong growth fundamentals matters so much.

Usable Equity vs Total Equity

Not all of your equity is accessible. Lenders typically allow you to borrow up to 80% of your property's value without triggering Lenders Mortgage Insurance (LMI). The difference between 80% of the property's value and your outstanding loan is your usable equity.

Here's the formula:

Usable Equity = (Property Value × 80%) − Outstanding Loan Balance

Using our example: ($750,000 × 80%) − $480,000 = $120,000 in usable equity.

That $120,000 can be used as a deposit and to cover purchase costs on your next investment property — potentially funding a purchase of $500,000–$600,000 without touching your savings.

How to Access Your Equity

There are two main ways to access equity:

• Refinance and equity release — Your lender (or a new lender) revalues your property and increases your loan to release the equity as cash. This is the most common approach.
• Line of credit — Some lenders offer a line of credit secured against your property's equity. You draw on it as needed, paying interest only on the amount drawn.

In both cases, the equity release is secured against your existing property. You're not selling anything — you're borrowing against the value that has built up. A mortgage broker can help you structure this efficiently and ensure the new borrowing is tax-effective.

The Compounding Effect

This is where equity becomes truly powerful. Consider this scenario:

• Year 0: You buy Property 1 for $500,000 with a $100,000 deposit
• Year 3: Property 1 has grown to $610,000 (7% annual growth). You now have approximately $110,000 in usable equity
• Year 3: You use that equity to buy Property 2 for $550,000
• Year 6: Both properties have grown. Combined equity is now sufficient to fund Property 3

Each property you add creates more equity, which funds the next purchase. This compounding effect is why time in the market matters so much — and why starting sooner, even with a modest first purchase, can lead to significantly better long-term outcomes than waiting for the “perfect” property.

Key Considerations Before Using Equity

Using equity to invest is powerful, but it increases your total debt. Before proceeding, consider:

• Serviceability — Can you service the additional debt? Lenders will assess your ability to repay all loans, including the new one, at a buffer rate above the actual interest rate.
• Cash flow — Will the new property's rental income cover most of its holding costs? Or will you need to fund a significant shortfall from your income?
• Cash buffer — Do you have a financial buffer for unexpected costs, vacancy, or rate rises? A buffer of 3–6 months of total holding costs is prudent.
• Market fundamentals — Is the new property in a market with strong demand drivers? Using equity to buy in a weak market compounds risk rather than wealth.
• Loan structure — Is the equity release structured correctly for tax purposes? Interest on borrowings used for investment purposes is generally tax-deductible, but the structure matters. Get advice from your accountant.

Common Mistakes When Using Equity

• Over-leveraging — Accessing every dollar of available equity without considering cash flow sustainability. Leave a margin of safety.
• Ignoring serviceability — Just because you have equity doesn't mean a lender will approve additional borrowing. Always check serviceability first.
• Poor property selection — Using equity to buy a property with weak fundamentals. The equity release is only valuable if the new property performs.
• Wrong loan structure — Mixing investment and personal borrowing in ways that reduce tax effectiveness. Keep investment loans separate from personal loans.
• No buffer — Using all available equity for the deposit with nothing left for unexpected costs. Always maintain a cash reserve.

Frequently Asked Questions

How much equity do I need to buy another property?

Enough usable equity to cover a 20% deposit on the new property plus purchase costs. On a $550,000 purchase, that's approximately $110,000 for the deposit plus $20,000–$30,000 for stamp duty and costs — roughly $130,000–$140,000 in total.

Do I need to sell my property to access equity?

No. You access equity through a refinance or equity release. Your existing property remains in your ownership.

How long does it take to build enough equity?

It depends on the growth rate of your property and how much principal you're paying down. In a market growing at 7% per year, a $500,000 property could generate $100,000+ in equity within 3 years. In a slower market, it may take 4–5 years.