Credit cards have the highest average interest rate out of most standard loans. Only some short-term or “payday” loans have higher interest rates, and they are nowhere near as common as credit cards. To put this in perspective, here are the average interest rates for different types of loans in Australia in 2015:
(Source: Reserve Bank of Australia, Statistical Table F05)
" Credit card interest rates vary considerably and will be determined by other factors such as the risks of unsecured lending, plus the various product features a particular card has."