Equity is the part of your home you actually own: the property's current value minus whatever you still owe on the loan. If your place is worth $650,000 and the loan balance is $526,000, your equity is $124,000. That's the textbook answer, and if it were the whole story this page would be three sentences long. It isn't, because the banks work off a different number, usable equity, and for most first home buyers in their first few years the gap between the two is enormous.
We don't sell home loans or equity products, and nobody pays us to make equity sound more accessible than it is. What follows is the two definitions, one honest worked example, and the thresholds that actually change your options.
Last updated 23 July 2026. Equity = your home's market value minus your loan balance. Usable equity = what a lender will typically let you borrow against, generally 80% of the property's value minus the loan. Early in a loan the difference is stark: our worked example, two years after a 10% deposit purchase, shows $124,000 of total equity and effectively zero usable equity. Reaching 20% equity is also the point where refinancing without new Lenders Mortgage Insurance becomes possible. Fewer than 1% of Australian mortgaged households are in negative equity (RBA, October 2025).
The Two Definitions That Matter
Total equity is the headline number: current market value minus loan balance. It grows when you pay the loan down, when the market lifts your home's value, and when you genuinely improve the property (a renovation, not a repaint).
Usable equity is the number a lender works with when you ask to borrow against your home, and the standard convention across the major banks is: 80% of the property's value, minus your current loan balance. The 20% the bank won't touch is its buffer against the market falling and against Lenders Mortgage Insurance territory. "Generally" is doing real work in that sentence: some lenders will go above 80% with LMI, serviceability still applies (your income and expenses must support the bigger loan), and the valuation used is the bank's valuation, which can come in below what a real estate agent tells you the place is worth.
One Honest Worked Example
Meet a couple who bought a $600,000 first home two years ago with a 10% deposit ($60,000), borrowing $540,000 at an assumed 6.0% over 30 years, excluding LMI and purchase costs. Two years of repayments at $3,238 a month, and say the property is now worth $650,000, a touch below the roughly 9 to 10% combined-capitals growth over the two years to mid-2026, to keep the example conservative.
| Number | Value | What it means |
|---|---|---|
| Current value (assumed) | $650,000 | Up from $600,000 at purchase |
| Loan balance after 2 years | $526,328 | Only $13,672 of principal repaid, from about $77,700 of repayments |
| Total equity | $123,672 | Looks substantial |
| 80% of value | $520,000 | The lender's ceiling |
| Usable equity | $0 | $520,000 minus $526,328 is negative; effectively zero |
| Current LVR | 81% | Still just above the 80% line |
Sit with that for a second, because it's the single most misunderstood thing about equity. This couple's total equity more than doubled from their $60,000 deposit, and yet a lender applying the standard 80% rule would advance them nothing against it. They're also still a whisker above 80% LVR, which means refinancing to another lender would likely trigger a fresh LMI premium (LMI doesn't transfer between lenders). At a value of $660,000 instead, they'd cross the line: LVR under 80%, refinancing without new LMI on the table, and usable equity just beginning to exist. The difference between "stuck" and "options" was about $10,000 of valuation.
Why Equity Builds So Slowly at First
Three forces build equity, and the one you control moves slowest at the start.
Repayments. On a standard 30-year loan, early repayments are mostly interest. In year one of a $600,000 loan at 6.0%, about 83% of what you pay is interest; roughly $7,400 of $43,200 in repayments actually reduces the loan. That's not your bank cheating you, it's how amortisation works: interest is charged on the whole balance, and the balance is biggest at the start. The tilt improves every year, and extra repayments or an offset account accelerate it dramatically.
The market. Capital growth did the heavy lifting in our example ($50,000 of the $124,000), and it's also the force you can't control or count on. The two years to mid-2026 delivered roughly 9 to 10% across the combined capitals, but the market turned in the June quarter of 2026: Sydney fell 3.2% and Melbourne 2.6% in that quarter alone. Equity from capital growth is real, but it arrives on the market's schedule, and it can leave the same way.
Improvements. Genuine value-adding work (an extra bedroom, a second bathroom) grows equity; cosmetic maintenance mostly preserves it. If you're weighing this up, our renovation loans guide covers the financing side.
The 20% Line: Where LMI Stops Mattering
The 80% LVR threshold shows up everywhere in Australian lending. Borrow more than 80% of a property's value and lenders generally charge Lenders Mortgage Insurance. Reach 20% equity and two doors open: you can typically refinance to a new lender without paying a fresh LMI premium, and usable equity starts to exist at all. That's why the worked example above matters: for a low-deposit buyer, the first couple of years are a grind toward the 20% line, and crossing it is the first real financial milestone of ownership.
Negative Equity, Honestly
Negative equity means owing more than the home is currently worth. It sounds catastrophic; day to day, it mostly isn't. It doesn't affect your credit score, your lender doesn't call the loan in, and if you keep making repayments it resolves as the balance falls and (usually) the market recovers. It bites in two situations: if you're forced to sell (the sale won't clear the loan) or if you want to refinance (no lender wants to take on a loan above the property's value). For scale: the RBA's October 2025 Financial Stability Review put the share of mortgaged households in negative equity at less than 1%. It's rare, but low-deposit buyers in a falling market are precisely the group it visits, which is another reason the 5% and 10% deposit paths deserve clear eyes.
What People Actually Use Equity For
- Renovating. Borrowing against equity to fund work on the home itself, which, done well, adds back to the value side of the equation.
- The next home. For upgraders, usable equity in the current place becomes the deposit on the next one, which is why the 20% milestone matters twice over.
- Helping the next generation in. Parents' home equity is what secures a guarantor loan, with all the risks our guarantor guide spells out: the guarantor's own home is on the line if things go wrong.
One caution belongs on every version of this list, and it comes straight from the banks' own pages: using equity means increasing your loan, which means higher repayments and possibly a longer loan. Equity isn't free money; it's borrowing capacity secured against your house.
Frequently Asked Questions
What is equity in a home in simple terms?
Equity is your home's current market value minus what you still owe on the mortgage. A $650,000 home with a $526,000 loan balance carries $124,000 of equity. It grows as you pay the loan down, as the property's value rises, and through genuine improvements to the home.
What is usable equity?
The portion of your equity a lender will typically let you borrow against: generally 80% of the property's value minus your current loan balance. It's always smaller than total equity, and early in a loan it can be zero even while total equity looks healthy. Lenders also apply their own valuation and serviceability checks before advancing anything.
How do I work out how much equity I have?
Subtract your loan balance (from your banking app) from your home's current value. For total equity, use a realistic market estimate; for anything involving a lender, remember they'll use their own valuation, which can come in lower than an agent's appraisal. Usable equity is 80% of the value minus the loan balance, if the result is positive.
How long does it take to build equity?
From repayments alone, slowly at first: in year one of a 30-year loan at 6.0%, about 83% of repayments go to interest. Most early equity comes from your deposit and market movement rather than principal repayment. Extra repayments, offset balances and genuine renovations all speed it up; a market downturn can pause it regardless.
What is negative equity and how common is it in Australia?
Negative equity is owing more on the loan than the home is worth. It matters mainly if you must sell or want to refinance; it doesn't affect your credit score and resolves over time if you keep repaying. The RBA's October 2025 Financial Stability Review put it at less than 1% of mortgaged households.
Want to see your own trajectory? Our repayment calculator shows how your balance falls over time, and the borrowing power calculator shows what a lender might advance. If you're weighing a refinance at the 20% line, a broker can check your LVR against current valuations for free; they're paid by the lender, not you. This page is general information, not personal financial advice; the worked example uses clearly labelled assumptions and your numbers will differ.
