How to Use the Equity in Your Own Home to Buy an Investment Property

Banks typically permit borrowing up to 80% of your home value under standard [LVR rules](/blog/what-does-lvr-mean). Usable equity equals (home value x 80%) minus your current mortgage balance. For example, a $900,000 home with $500,000 owing has usable equity of $220,000, which could serve as your investment property deposit without requiring additional cash savings.

Existing investment properties commonly require a larger deposit or equity buffer. Qualifying new-build or construction lending may create more flexibility, but 10%, 10-20%, or 20% deposits are not automatic; lender policy, servicing, valuation, usable equity, property eligibility, and loan structure still apply. Your home equity may help meet the deposit or equity contribution a lender requires.

The first option is a [mortgage top-up](/blog/can-i-get-a-top-up-on-my-mortgage), where you increase your existing mortgage to release equity for the new deposit. The second option is cross-collateralisation, where both properties secure a single lending arrangement. Cross-collateralisation offers convenience but carries risk - problems with one property could affect both, so discuss structuring options with your mortgage adviser.

Beyond equity availability, banks assess your ability to service both mortgages including your income, expenses, existing debts, and the expected rental income from the new property. Rental income is typically scaled at 65-80% to account for vacancies and expenses. Your [debt-to-income ratio](/blog/debt-to-income-ratios-what-are-they-and-how-are-they-measured) must also meet lender requirements.

Using equity means no cash deposit is required - your home appreciation can eliminate the need for substantial savings accumulation. It enables accelerated portfolio growth compared to saving each deposit from scratch. Additionally, investment property mortgage interest may be tax-deductible for new builds, subject to current legislation. Learn more about [preparing to buy an investment property](/blog/3-things-investment-property-buyers-can-today-get-ready-buy).

Key risks include increased debt burden and exposure to property market fluctuations - declining house prices can reduce your equity and increase your LVR. Interest rate changes can affect cashflow even on currently positive properties. Ensure you can afford payments if rental income drops or rates rise, and consider whether your primary residence could be at risk if cross-collateralised.

Separating your loans provides greater protection for your primary residence and more flexibility for future decisions. If one property needs to be sold or encounters issues, the other remains unaffected. A qualified mortgage adviser can help structure your lending to protect your family home while still enabling investment growth.

Consider whether you can afford payments if rental income drops or rates rise significantly, whether the investment area has strong tenant demand, and whether you understand [landlord responsibilities](/blog/the-top-fears-landlords-have-about-tenants-and-how-to-manage-them). Calculate your potential rental yield and ensure you have emergency funds beyond your equity. Speaking with a mortgage adviser helps evaluate whether you are truly ready.