Most credit cards charge high interest rates—as much as 18 percent or more—if you don’t pay off your balance in full each month. If you owe money on your credit cards, the wisest thing you can do is pay off the balance in full as quickly as possible. Vir- tually no investment will give you the high returns you’ll need to keep pace with an 18 percent interest charge. That’s why you’re better off eliminating all credit card debt before investing savings. Once you’ve paid off your credit cards, you can budget your money and begin to save and invest. Here.