Converting credit cards into cash can be costly due to the various fees and interest rates involved. Cash advances usually come with higher fees than regular purchases. These fees can range from a flat rate to a percentage of the amount withdrawn.nnThe annual percentage rate (APR) for cash advances is typically higher than the APR for purchases, making it more expensive to borrow cash using credit cards. Interest starts accruing immediately on cash advances, unlike regular purchases, which have a grace period.