Smart Ways to Use Home Equity to Buy a Second Home

You can use equity in your current home to fund the deposit and costs for a second property without selling your existing asset or waiting years to save again.

For many Victorian homeowners, the value in their current property has grown substantially over the holding period. That equity can become the foundation for purchasing an investment property or a holiday home, provided your income supports the combined debt and you structure the lending correctly. The decision often comes down to understanding how much equity you can access, how lenders assess your ability to service both loans, and whether the timing aligns with your broader financial position.

How Lenders Calculate Usable Equity

Usable equity is the portion of your home's value that sits above what you owe, minus the amount lenders require you to retain. Most lenders will lend up to 80% of your property's current value without requiring lenders mortgage insurance. If your home is worth more than the outstanding loan balance, the difference up to that 80% threshold becomes available for other purposes.

Consider a property owner in Bentleigh whose home is now valued at $1.2 million with $400,000 remaining on the mortgage. The lender will allow borrowing up to 80% of the property value, which is $960,000. Subtract the existing loan balance, and the owner has access to $560,000 in usable equity. That amount can cover a deposit on a second property, plus purchasing costs like stamp duty and conveyancing, without liquidating other assets.

The calculation changes if you're willing to pay lenders mortgage insurance to access more than 80% of your property's value. Some buyers do this to move faster or to secure a higher-value second property, but the insurance cost can add several thousand dollars to the upfront expense. The decision depends on whether speed or cost minimisation matters more in your situation.

Servicing Two Loans on One Income or Household Budget

Lenders assess whether your income can support repayments on both the existing home loan and the new loan for the second property. They apply a serviceability buffer, typically adding 3% to the current interest rate, and calculate whether your income covers both debts plus living expenses.

If you're purchasing an investment property, lenders will include a portion of the expected rental income in their assessment, usually between 70% and 80% of the market rent. This rental offset can make the difference between approval and decline, particularly if your income alone sits close to the servicing threshold. A buyer earning $120,000 annually might struggle to service $1.4 million in combined debt without rental income factored in, but with $650 per week in expected rent from the second property, the numbers often work.

Your existing expenses also matter. Lenders review credit card limits, personal loans, and other ongoing commitments when calculating what you can afford. Reducing or closing unused credit facilities before applying can improve your borrowing capacity and open up options that wouldn't otherwise be available.

Structuring the Loan to Protect Both Properties

When you borrow against equity in your home to fund a second purchase, the way the loan is structured determines your flexibility and risk. The most common approach is to split the lending across two separate loan accounts: one secured against your existing home, and one secured against the new property.

This structure, often called cross-collateralisation, means both properties secure the total debt. While it allows you to access equity without refinancing your entire home loan, it also means both properties are tied together. If you want to sell one property later, you'll need the lender's approval to release it from the security, which can delay settlement or limit your options if the remaining property doesn't hold enough value to cover the outstanding debt.

An alternative is to keep the loans completely separate by refinancing your existing home loan to release equity, then using that equity as cash for the deposit on the second property. The new property is then secured only by its own loan. This approach takes longer and may involve higher upfront costs, but it gives you the freedom to sell or refinance either property independently. For buyers planning to build a portfolio or exit one asset within a few years, the separation is worth the additional setup effort.

If the second property is an investment, you'll also want to ensure the portion of the loan used to purchase that asset is structured separately from any debt tied to your home. This keeps the interest on the investment loan tax-deductible and avoids blending personal and investment debt, which can create complications at tax time.

Timing the Purchase Around Rate Movements and Equity Shifts

Property values and interest rates both affect how much equity you can access and whether the purchase remains affordable. If you're planning to use equity, the valuation conducted by the lender at the time of application determines how much is available. A property that was worth $1 million two years ago might now be valued at $1.15 million, or it might have stayed flat depending on the suburb and market conditions.

In our experience, buyers who wait for a formal valuation before committing to a second purchase avoid the frustration of finding a property, going under contract, and then discovering their equity position doesn't support the deposit they expected. Getting a valuation done early, or at least understanding recent comparable sales in your area, gives you a realistic budget before you start searching.

Rate movements also affect serviceability. A buyer who could comfortably service two loans at lower variable rates might find their application declined or limited if rates have shifted higher since they last borrowed. Locking in a portion of the debt on a fixed rate can provide certainty, but it also reduces flexibility if you want to make extra repayments or access redraw facilities. The decision depends on your income stability and risk tolerance.

What Happens If You Want to Sell One Property Later

If your loans are cross-collateralised, selling one property requires the lender to release it from the security pool. The lender will assess whether the remaining property holds enough value to support the outstanding debt. If it does, the release is usually straightforward. If it doesn't, you may need to pay down part of the loan before the sale can proceed.

Consider a scenario where you own a home worth $1 million and an investment property worth $700,000, with a combined debt of $1.2 million split across both properties. If you sell the investment property and clear $700,000 after costs, you'll have $500,000 remaining in debt secured against your home. As long as your home's value supports that debt level under the lender's criteria, the release proceeds without issue. If property values have fallen or the lender's policies have tightened, you might need to refinance or inject additional funds.

Keeping loans separate from the outset avoids this step entirely, but it's not always the most cost-effective option at the time of purchase. The choice depends on how long you plan to hold both properties and whether you expect to sell, refinance, or continue building your portfolio.

Using equity to fund a second property can accelerate your wealth-building timeline, but it works only when your income supports the debt, your equity position is strong enough to cover the deposit and costs, and the structure aligns with your plans for both assets. Call one of our team or book an appointment at a time that works for you to review your equity position and map out the steps for your next purchase.

Frequently Asked Questions