Second Nature (formerly FilterEasy) accepts all major credit/debit cards for payment. When you update your information and select your interval, we will charge your card on file upon shipment. Even though we give you a convenient breakdown of your monthly cost on the site, you are charged only when your filters leave our warehouse (With a few exceptions including custom filters). You will see a $1 pending charge on your account upon signing up, but this is only to verify your card for future orders. This $1 falls off of your account automatically.
Learn more about FilterEasy here.