Yes, credit card churning may affect your credit score. For instance, your credit score drops slightly each time you apply for a new credit card. In addition, every time you open or cancel a credit card, the average length of your credit accounts reduces, which negatively affects your credit score. But each new card adds to your total available credit limit, and if you pay off your balances in full each month, you may expect a low credit utilization ratio. This, in turn, helps improve your credit score. That said, the opposite might happen if you use your new cards to rack up more debt.