The amount of interest on credit cards varies from card to card.
Better deals on credit cards with lower interest are generally offered to people with better credit scores. Cards with higher interest (these can go up to 60% or 70% interest) tend to be offered to people with lower credit scores – lenders view people with worse credit scores as those who are more likely to fall into credit card debt, which is why the better deals aren’t available to them.
As well as interest, credit cards can include costly charges if you go over your limit, so you should consider this before you agree to a new credit card.