Compare zero interest credit cards. Not all offers are the same. The truth is that some supposedly 0% APR credit cards will actually cost you more money over the long haul than cards that charge interest rates. Of course, the zero interest credit cards are only promotional offers and did not last forever. Usually they are introductory rates that last anywhere from three months although it up to, in some cases, 18 months. It really all depends on the issuer and the specific offer. It is advisable that consumers carefully study the terms and conditions of each and every offer they are interested in before they apply.