You: Hi, I’d like to request a credit increase. I currently have five thousand dollars available, and I’d like ten thousand. Credit card rep: Why are you requesting a credit increase? You: I’ve been paying my bill in full for the last eighteen months and I have some upcoming purchases. I’d like a credit limit of ten thousand dollars. Can you approve my request? Rep: Sure. I’ve put in a request for this increase. It should be activated in about seven days. I request a credit-limit increase every six to twelve months.