Credit card limit increases can have a positive impact on your credit score by potentially improving your credit utilization ratio. (Your credit utilization ratio is the percentage of available credit you are using, or your total outstanding credit card balance divided by your total credit limit.) If your credit limit increases but your balance stays the same, your credit utilization ratio will be lower. That can lead to a higher credit score, because the credit utilization ratio is one of several factors used to determine your credit score.