Is there a different policy that bank practice in generating minimum payment for a credit card balance? I have two credit cards with 0% interest APR going on both of them. I have similar credit card balance ( say for example X) on both the credit cards. One Bank is charging me 1% of X as the minimum payment and other bank is charging me 3% of X. I am in California. Does anyone know if there is a fixed / general rule in determining minimum balance for the customers?