If you've been reading American finance sites, you'll have seen the home equity loan described as its own product: a second loan, sitting behind your mortgage, paid out as a lump sum. Australian lenders don't really work that way. When someone here asks us for a home equity loan, they almost always mean one thing: borrowing more against a property they already own, using the value they've built up in it as security.

There are a few ways to do that, and they behave quite differently. Picking the wrong one won't usually stop the money arriving, but it can cost you in tax, flexibility or discipline for years afterwards.

First, what counts as equity

Equity is the gap between what your property is worth and what you owe on it. A home valued at $1.8 million with a $700,000 mortgage has $1.1 million in equity on paper. You can't borrow all of that. Lenders generally cap total lending at around 80% of the value before mortgage insurance comes into it, so the amount you can actually access, usually called usable equity, is smaller. Our guide on how much equity you can use walks through the sum.

Two other things shrink the number further. The lender uses its own valuation, not the agent's appraisal or the online estimate. And having the equity doesn't mean you can afford to borrow it. The lender still has to be satisfied that your income covers the bigger loan.

The three ways to borrow against your home

1. A top-up on your existing loan

Your current lender increases the loan limit and pays the extra out to you or to whoever you're paying. It's the simplest option and often the quickest, because the lender already knows you and the property. It works well for a one-off cost like a renovation or a car.

The catch is that the new money gets blended with the old debt if it all sits in one account. That's fine if both are for your own home. It's a problem if part of it is for an investment, which we cover below.

2. A separate loan split

Instead of adding to the existing balance, the lender sets up a new loan account, secured by the same property. Each split can have its own rate type and repayment terms. This is how most people fund an investment property deposit out of their home's equity: one split for the house, a separate split for the investment, so the interest on each can be tracked cleanly.

3. A line of credit

A line of credit gives you an approved limit you can draw on and repay as you like, a bit like a very large credit card at a home loan rate. You usually only pay interest on what you've drawn. Some people use one for staged renovation costs or as a buffer for a business.

They suit organised people. Because there's often no set repayment, the balance can sit at the limit for years without going down. Fewer lenders offer them now than a decade ago, and the ones that do tend to be stricter about who gets one.

And if your current lender says no

You can refinance to another lender and take the extra out at the same time. It's more paperwork, but it's common when the current lender's valuation comes in low or its policy doesn't fit what you want to do. Our refinancing page covers how that switch works.

What about reverse mortgages?

A reverse mortgage is a different animal. It's built for older homeowners, usually retirees, and there are no regular repayments: the interest is added to the balance and the loan is repaid when the home is sold. Some people call that a home equity loan too, which causes confusion. Everything in this article is about ordinary borrowing that you repay from your income. If a reverse mortgage is what you're weighing up, it's worth getting independent legal and financial advice before signing anything.

What the lender will want to know

  • What the money is for. Lenders ask, and some purposes are easier than others. Renovations, investment property and buying a car are routine. Large unexplained cash amounts get more questions, and some lenders limit how much they'll release without a stated purpose.
  • Whether you can afford it. Your income, expenses and other debts are assessed as if you were applying for the whole new balance, at a buffer above the actual rate. This is where most equity requests get cut back.
  • What the property is worth. The lender orders its own valuation. On the North Shore and Northern Beaches, homes with water views, unusual blocks or few recent sales nearby can come back lower than owners expect.
  • How much you're borrowing in total. Go above 80% of the value and mortgage insurance usually applies. See our explainer on LMI.

Keep the purposes apart

This is the part people regret skipping. If you borrow against your home to buy an investment, the interest on that portion may be tax-deductible. If the investment money and your home loan sit in one account, working out which interest relates to which becomes messy, and redraws or extra repayments can muddy it further. Setting up a separate split from day one avoids most of that. How the tax side applies to you is a question for your accountant, but the loan structure is something we set up at the start, and it's hard to unpick later. Using home equity to build wealth goes into this in more detail.

What people commonly use it for

  • Renovating. For smaller jobs a top-up usually does it. For bigger builds a construction loan with progress payments can fit better. Renovation loan or equity top-up compares the two.
  • An investment property deposit. Equity covers the deposit and costs, a second loan covers the rest.
  • Helping a child buy. Some parents release equity and gift or lend it. Others go guarantor instead. Our guarantor guide sets out the difference.
  • Clearing expensive debt. Rolling a car loan or credit cards into the mortgage lowers the rate, but stretched over 25 or 30 years it can end up costing more in total. Only worth doing if you repay it quickly.

The risks, plainly

Whatever you borrow is secured against your home. If the money goes into something that loses value, the debt doesn't shrink with it. Repayments go up, and if rates rise they go up again. And a top-up often resets the loan to a fresh 30-year term, which keeps repayments low but drags out how long you're paying interest.

None of that is a reason not to do it. Plenty of our clients have used equity well. It's a reason to borrow for something specific, with a plan for paying it back.

How long it takes

A straightforward top-up with your current lender can be done in a week or two. A new split or a refinance to another lender takes longer, mostly because of the valuation and the full credit assessment. If you need the money by a date, such as an auction or a builder's deposit, start early.

If you want to know what you could realistically access and which way of doing it suits what you've got planned, get in touch or call 1300 001 755. We're based in Forestville and work with owners across Sydney's north. More on how we approach it on our equity release page.

Frequently asked questions

Is there such a thing as a home equity loan in Australia?

Not as a separate product in the way it exists in the US. In Australia, borrowing against your home's equity usually means a top-up on your existing loan, a new loan split secured by the same property, or a line of credit.

How much equity can I borrow against?

Usually up to about 80% of the lender's valuation, minus what you already owe, before mortgage insurance applies. Your income also has to support the larger loan, and that is often the real limit.

Do I have to tell the lender what the money is for?

Yes. Lenders ask for the purpose, and some limit how much they will release without one. Renovations, investment purchases and similar purposes are routine.

Is a line of credit the same as a home equity loan?

It's one way of borrowing against your equity. A line of credit gives you a limit to draw on and repay as you like, rather than a lump sum with set repayments. Fewer lenders offer them than in the past.

General information only. It does not take your objectives, financial situation or needs into account, and it is not credit or financial advice. Lender policy, rates and eligibility change regularly and vary between lenders — talk to us about your own circumstances before acting on anything here.