80% of UK credit card users make common, avoidable mistakes, primarily not fully repaying balances and paying minimum repayments, according to Compare the Market study.

80% of UK credit card users make common, avoidable mistakes, according to a study by Compare the Market. Most frequent errors include not fully repaying balances (leading to £194 average interest), withdrawing cash with credit cards, and paying only minimum repayments. To avoid these pitfalls, users are advised to fully repay balances, compare credit cards, and switch to cards with better rewards or interest-free periods.