A green card is valid for either 2 years or 10 years. A green card that was obtained through a marriage-based application, where the marriage was less than 2 years at the time the visa or adjustment of status application was approved, will result in a 2-year conditional green card. The green card holder must apply to remove these conditions at least 90 days before expiration. A 10-year green card is issued, if the petition is successful.
A 10-year green card can be renewed multiple times, potentially indefinitely.