Debt experts have said that around one million people use high interest credit cards to cover their mortgage or rent payments. Six per cent of householders have put their mortgage or rent payments on their credit card in the past year according to the housing charity Shelter. Credit card companies often charge interest of around 15 and 18 per cent which is up to three times more then most mortgage rates. The problem seems to be worst among 18 to 24 year olds. It certainly seems like a very risky way of managing your finances.