Joint credit is when two or more people share credit. Sometimes, it is used by couples when one person has little or bad credit, or they need to make a big purchase, such as a house. It is based on both people’s combined assets, incomes and credit report and makes both parties responsible for repaying any debt. If couples enter into joint credit, they are both responsible to repay any debt. In that respect, it is different from having an authorized user on an account, an arrangement in which case only one person is responsible for repayment.