Before a lender tells you what rate you'll pay, they do one piece of arithmetic: they divide what you're borrowing by what the property is worth. That fraction is your loan-to-value ratio, or LVR, and it quietly shapes almost everything else in the offer, the rate on the letter, whether you're paying for insurance you'll never claim on, and how much deposit actually gets you a seat at the table.
What LVR is and how it's calculated
LVR is the loan amount divided by the value of the property, expressed as a ratio (usually shown as a percentage). If you're borrowing most of the property's value, your LVR is high. If you're borrowing a smaller slice because you've put down a larger deposit, your LVR is low.
The "value" side of that equation can differ from the price you agreed to pay, as the valuation section explains. But the basic relationship is simple: more deposit (relative to the property) means a lower LVR, and a lower LVR means you're borrowing less against the asset securing the loan.
Separate LVR from your deposit percentage, even though they move together. Your deposit is what you bring. Your LVR is what the lender sees when they look at the whole picture: their loan, sized against their valuation. The two numbers are related but not identical, and the difference matters more than it looks.
Why lenders care about it
A mortgage is secured by the property. If a borrower cannot keep paying and the loan has to be recovered by selling the property, the lender's risk depends heavily on how much equity was in the deal to begin with. A loan with a low LVR has a buffer: even if the property has to be sold under pressure, or the market has softened since settlement, there is more room before the sale price fails to cover what is owed. A high LVR has less of that buffer, sometimes none at all.
This is why LVR sits at the centre of mortgage lending: it measures how much risk the lender is taking against the property. Banking regulation also treats it as a system-level concern rather than only a per-loan one. APRA's prudential standards on residential mortgage lending exist partly because a banking system with too many high-LVR loans on its books is more exposed if property prices fall broadly, as well as in individual cases. When you see a lender tighten its appetite for high-LVR lending, that is usually this system-wide risk view flowing down into an individual application.
How LVR links to LMI and your rate
Two things typically move with LVR: whether you need lenders mortgage insurance, and what rate you're offered.
Generally speaking, the higher your LVR, the more likely a lender is to require lenders mortgage insurance, because a smaller deposit means less buffer if things go wrong. We've covered how LMI works and who pays for it in a separate piece, worth reading if any of this is new.
Rate pricing works on the same logic, separately from LMI. A borrower with a low LVR is generally seen as a lower-risk proposition, so a lender may price that loan more favourably. A borrower with a high LVR represents more risk, which can affect the rate, the conditions, or both. Exactly how a given lender prices this is not a fixed rule, and it is not something this piece can pin down, treat it as a question to put to a broker or the lender directly, and check current pricing with ASIC Moneysmart or the lender rather than relying on what you read elsewhere.
What counts as 'value': price vs valuation
Here is the part that catches people out: loan-to-value uses the lender's own valuation of the property, carried out by a valuer they engage (or accept), rather than automatically using the price you agreed to pay.
APRA defines LVR against the value of the property securing the loan, and the lender's valuation can differ from the purchase price. A valuation can come in lower than the price you agreed to pay. When that happens, your LVR is calculated against the lower figure, not what you actually agreed to pay. That can push your LVR higher than you expected, even though your deposit and the purchase price haven't changed, which can in turn trigger LMI you weren't budgeting for or affect the rate you're offered.
That is a good reason to treat the purchase price and the bank valuation as different inputs, and to ask your broker or lender early what valuation approach they'll use.
How to lower your LVR
There are really only two levers, and they both point at the same fraction. You can increase the deposit side by saving more, or by looking into other options such as a guarantor arrangement or drawing on existing equity, these are worth raising with a broker or lender, since eligibility and terms vary and are not something to assume from a general guide. Or you can reduce the loan side, by negotiating a lower purchase price or choosing a less expensive property relative to your deposit.
Either move does the same job: it shifts the ratio in your favour. Before you commit to a purchase, it's worth asking a broker or lender to model your likely LVR against their own valuation approach, more than the advertised price, so the number you're planning around is the one that will actually show up on the loan documents.