Turning your equity into the next property

If your home has grown in value while you've been paying down the loan, you may be holding a deposit for your next property without realising it. The key is knowing the difference between the equity you have on paper and the equity a lender will actually let you use.

Total equity vs usable equity

Total equity is simply your property's value minus what you owe. Usable equity is the part a lender will release — and it's smaller. Lenders typically let you borrow up to 80% of the value, less your existing loan. So on a $1.2m home with a $500k loan, 80% of value is $960k; subtract the $500k loan and your usable equity is around $460k. (You can sometimes access more above 80%, but LMI then applies.)

The "rule of four"

A handy back-of-envelope guide: your usable equity multiplied by roughly four approximates your next-purchase budget. The logic is that you'll use the equity to cover a ~20% deposit plus ~5% costs — about a quarter of the purchase price — with the rest funded by a new loan. So $460k of usable equity points to roughly a $1.8m ceiling. It's indicative, not a promise: serviceability still has to stack up.

Equity is access, not affordability

This is the trap to avoid. Having usable equity doesn't mean you can service the larger total debt — the lender will still test your income against repayments on everything you owe. Equity opens the door; income decides whether you can walk through it.

Don't deploy every cent

Even when the numbers work, using all of your usable equity leaves no buffer for rate rises, vacancies or repairs. Sensible investors keep a cash reserve outside the deal. Used carefully, equity is one of the most powerful tools for building a portfolio — the skill is structuring it so one property's growth funds the next without overextending you.