Despite making your car and credit card payments on time, your credit score still may be dropping.<br />Credit scores are based on payment history, balances, length of history, and types of credit accounts.<br />According to Business Insider, one surefire way to make your score go down is through late payments.<br />Another is to make minimum payments on cards that are maxed out.<br />And a very unnerving situation can occur when another loan servicer buys your mortgage. <br />