The current average credit card interest rate is 20.35%, ... It’s important for any credit card holder to know their interest rates, especially because APRs are so high.

Credit card rates top 20%. ... “Any credit card holder who finds themselves in financial stress should always contact their card issuer to make them aware of their situation,” Townsend said.

A joint account holder, on the other hand, is pretty much a co-owner for a credit card account. With a joint account, each party is equally responsible for payment of the balance on the credit card.