While you could close the credit card after you've paid off the transferred balance, that's not always the best move. The age of credit accounts and your overall available credit both contribute to healthy credit scores, meaning your credit scores will suffer should the card be closed. If the card doesn't carry an annual fee, then there isn't much reason to cancel the card. Issuers may even periodically reach out with another intro balance transfer offer following responsible use with the card. Despite most balance transfer cards not offering any rewards, your overall financial health will be better off by keeping the card open even after you've completed a balance transfer.