It is the worst time to be a first homebuyer since 1957 apparently.

Infometrics say millennials are signing up to a lifetime of debt and they're likely to be much worse off than baby boomers.

They say the two key factors for this are the average proportion of a household's income needed to service the loan throughout the mortgage and the expected increase in the value of the property over the life of the loan.

Infometrics chief forecaster Gareth Kiernan joined Heather du Plessis-Allan.

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