What is the highest interest rate allowed by CA law?

California, as well as 26 other states have no limitation on interest rates, user fees, late penalties, etc for credit cards. Arkansas is the only state with very strict usury statutes.Federal usury laws are of little help, as the only stipulation is for the credit card companies to inform customers of their rates and fees. There has been a bill "stuck" in legislation to place a 17% cap on interest rates, it is doubtful it will ever become law.