You can add funds to your account (or pay your account balance) at any time by using the My Account->Manage Account screen. To the right of your Balance, click on the "Clear Account Balance" link. This will bring you to a notification screen and provide a link to pay your account balance. Auction Nitro uses Business-class PayPal account as its payment gateway of choice, thus allowing you to securely clear your account balance using Visa, Mastercard, Discover, or American Express without having to open a PayPal account. If you do have an existing PayPal account, you can log in and use it if you so choose.