John Kerr, the father of supermodel Miranda Kerr, has revealed that “spare change” helps pay of his mortgage quickly, forgetting to mention his millionaire daughter.

He told The Sydney Morning Herald that the loose coins in his car were his weapon in getting out of debt faster.

“I have a container in my car that holds a couple of hundred dollars in coins and every time that’s full I put it into a big money box, then every year I’d take that to the bank and cash the coins in and it would come to about $4,000 and I’d put that straight into the house,” he said.

“And I never forget the saying, I think my dad told me, that a little bit will always add up to a lot. I just look at things and look to try and pay as much off my home loan as I can.”

“I always hated owing money to the bank,” he added.