The deposit myth costing first home buyers two years

Almost every first home buyer who sits down with us arrives carrying the same number: twenty per cent. It gets repeated at barbecues, on comparison sites, and by well-meaning parents who bought their first place in 1998. It is also, for a large share of buyers, the single most expensive assumption they will ever make.

What the twenty per cent rule is actually protecting

A twenty per cent deposit exists to protect the lender, not you. Fall below it and the lender takes out lenders mortgage insurance, then passes the premium on. That premium is a real cost and we never pretend otherwise. What we do insist on is that it be weighed against the cost of the two extra years most buyers spend reaching that threshold — because during those two years the deposit target is moving too.

That is the part the rule of thumb cannot see. Saving harder is a fixed effort against a target that keeps rising. Buying earlier with a smaller deposit converts a moving target into a fixed debt, and it is very often the cheaper of the two paths even after the insurance premium is added.

Run the comparison both ways, on paper

1. Price the loan at your deposit today, premium included, and write down the total repayment over five years.
2. Price the same property at a realistic price in two years, at a 20% deposit, and write down the same five-year figure.
3. Add the rent you will pay across those two years to the second column. It belongs there.
4. Check whether a guarantor, a state scheme or a professional waiver removes the premium entirely — for several occupations it does.

“Two thirds of the declines we see are the wrong lender, not the wrong borrower.”

That line surprised the journalist who quoted it, but it matches what our file review found. Of 62 applications that came to us already declined, 41 were approved elsewhere within a fortnight with no change to income, deposit or the property. The borrowers had not become more creditworthy. They had simply been assessed against a policy that fit them.

First Home Buyers

None of this means a smaller deposit is always right. It means the twenty per cent rule is a lender's convenience dressed up as financial wisdom, and it deserves to be tested against your actual numbers before it costs you two years.