17/09/2026
A 20% deposit is a benchmark, not a home-buying strategy.
A common conversation we’ve had with homebuyers start like this: “Should we buy with 10%, or wait until we have 20%?”
The obvious answer is that 20% generally lowers the loan and may avoid LMI.
But that's only one side of the decision.
Home Loan Experts Senior Mortgage Broker Vivienne Than puts it this way:
“There’s never going to be a ‘perfect’ time to buy property, so it really comes down to when your cash flow comfortably allows it.”
The useful comparison is wider:
If you buy with 10%:
What does LMI cost, if applicable?
Does the higher LVR affect pricing or lender choice?
Could you qualify for a low-deposit structure or LMI waiver?
How much cash remains after settlement?
What are the repayments?
If you wait for 20%:
How long does the additional saving take?
What happens if the price of the type of property you're targeting changes?
What do you give up by keeping the purchase on hold?
There's another issue buyers often overlook: valuation risk.
Someone planning to contribute $100,000 towards a $1 million purchase might expect a $900,000 loan.
But if the lender values the property at $950,000 and lends up to 90% of that figure, the loan is $855,000.
The contribution becomes $145,000 before buying costs.
That's why deposit planning is really an LVR + valuation + cash-flow + lender-policy problem, not simply a savings-percentage problem.
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Our Home Loan Deposit Calculator gives buyers the starting figures.
The valuable part comes next: understanding what those figures mean under different lending structures.