Your Lowe's credit card is immediately usable after it has been activated. In-store, all you have to do is show your card at the register, insert or swipe it, then input your PIN or sign to complete the transaction. Enter the security code, expiration date, and card number when you check out online at Lowes.syf.com/activate. Track your spending using the Lowe's credit card app or online, and make sure to review the terms of your card for any special financing options. Start using your new card's advantages and rewards right away.