LVR and Home Equity Calculator

What LVR is, and why 80% is the number that matters

LVR is your loan balance divided by your property value, as a percentage. Owe $400,000 on a home worth $800,000 and your LVR is 50%. The reason 80% gets all the attention is that it is the line most Australian lenders use to decide whether lenders mortgage insurance applies.

Above 80% the lender sees more risk and charges LMI, a one-off premium that can run into the tens of thousands on a large loan. The part people miss is that LMI protects the lender, not you, and it is usually capitalised into the loan, so you pay interest on the premium for years afterwards.

Get to 80% or below and two things change. LMI disappears from the conversation, and you are in a much stronger position on rate, because lenders price LVR in tiers and compete harder for lower-risk borrowers. Most people never ring up and ask after their LVR improves, which is free money left sitting there.

Total equity and usable equity are not the same thing

This is where most people go wrong, so it is worth slowing down. Total equity is just value minus loan. On an $800,000 home with a $400,000 loan that is $400,000, and it is the number that feels good to look at.

Usable equity is a different question. It is what you can borrow against while staying at or below 80% LVR, so it is 80% of the value minus your loan. Eighty percent of $800,000 is $640,000, minus the $400,000 loan leaves $240,000 of usable equity. The other $160,000 is real wealth, it just sits behind the 80% wall and costs you LMI to reach.

Usable equity is also not cash. It is borrowing capacity. The lender still has to be satisfied you can service the larger debt, and they stress test it at a buffer of three percentage points above the actual rate. Plenty of people have equity on paper and no ability to access it.

Using equity to buy again, and the mistake in the maths

Here is the error worth correcting. People see $240,000 of usable equity and picture a $240,000 unit. That is not how it works. The equity funds the deposit and the upfront costs. A new loan covers the rest.

Run it properly and $240,000 of usable equity in New South Wales covers a 20% deposit, the stamp duty and the legals on a property of roughly $990,000, with a new loan of about $792,000 behind it. That is a different conversation entirely, in both directions: the buying power is far greater than people assume, and so is the debt.

Where you buy changes the answer too, because duty is state law. The same $320,000 of usable equity stretches to about $1.32 million in New South Wales but only $1.24 million in Victoria, purely because Victorian duty on that price is close to $15,000 higher. The calculator above uses each state's real duty scale rather than a rule of thumb, so switching the state actually moves the number.

The three risks worth naming plainly

The bank's valuation. What you think the place is worth is not what they lend against. Lenders use their own registered valuers and they can come in conservatively, especially in a softening market. A valuation $50,000 below your estimate on an $800,000 home wipes $40,000 off your usable equity overnight, and it usually surfaces late, after you have made plans.

Serviceability. Equity is not approval. Your income has to carry the existing loan and the new one, assessed with that three percentage point buffer on top. Rental income counts, but lenders shade it rather than taking it at face value.

Cross-collateralisation. This is the one that quietly traps people. If one lender secures both properties against both debts, you are cross-collateralised. It looks convenient right up until you want to sell one, at which point the lender has to reassess the security over the other, or you want to refinance one independently and find you cannot. The cleaner structure is to release equity as a separate facility and keep the two properties as separate securities. Ask your broker to spell out which one you are being offered.