Thinking of helping the kids buy a house? Avoid these three bank-of-mum-and-dad traps

Many older Australians want to help their children into a first home, and good intentions can turn messy fast if the help is not structured properly. The bank of mum and dad has quietly become one of the biggest lenders in the country, but a handful of common missteps can turn a generous gift into a financial headache for everyone involved. Here is what to watch for before signing any cheque.

Housing affordability is the reason families are stepping in at all. The Productivity Commission estimates the bank of mum and dad is worth $35 billion, which places it somewhere between the fifth and ninth largest mortgage lender in Australia. Research from the University of Newcastle, surveying 80 older parents and their adult children, found the average contribution towards a deposit was $75,000, ranging from $5,000 right up to $500,000.

First homebuyers have also had access to a 5% deposit scheme for about a year now, where the government guarantees the extra 15% needed to reach the usual 20% threshold, sparing buyers the cost of lenders’ mortgage insurance. It sounds like a shortcut, but a 95% loan leaves very little room to move. With prices easing under the budget’s capital gains tax and negative gearing changes, some of those buyers who jumped in early have found themselves with less equity in the home than they put in, a position known as negative equity.

That is exactly why some parents still want to top up the deposit, both to build a buffer against falling prices and to make the repayments easier to manage. But three traps can undo all that good intention.

The first is gifting cash without checking the rules if you receive, or expect to receive, a Centrelink payment. Gifts or loans above $10,000 in a single financial year, or $30,000 across a rolling five years, are treated as deprived assets. For couples, that cap applies to combined assets, not each person separately.

Breach that limit and Centrelink does not simply ignore the extra money, it adds it straight back into your assets test and applies deeming rules under the income test as well. In plain terms, you can lose part of your pension for money you no longer actually have, because Centrelink still counts it as yours. Anyone with an age pension or other benefit on the line needs to keep gifts under the threshold or plan the timing carefully across several years.

The second trap is going guarantor on a child’s loan by putting up the family home as security, rather than handing over cash. It is a popular alternative to the 5% deposit scheme because it avoids lenders’ mortgage insurance altogether, but it ties your own property to someone else’s mortgage. If the child falls behind on repayments, the parents’ home is the asset the bank can come after, not just the money originally intended as help.

The third trap is giving just enough to get a child over the line, without leaving a buffer against falling prices. With deposits now able to sit as low as 5%, a small drop in property values can tip a new buyer into negative equity almost overnight. A contribution that only meets the bare minimum can leave the very child it was meant to protect more exposed, not less.

Helping the kids buy a home remains one of the most generous things a parent can do, but generosity works best with a plan behind it. Get the structure right, and it builds wealth for the next generation. Get it wrong, and it can cost a pension, a property, or both.