If your ESTA has expired, you must reapply by submitting a new application at ETAPORTAL Existing authorizations cannot be extended.
You do not need to wait until your ESTA expires to reapply. Your prior ESTA will be canceled and replaced with your new application.
ESTA approvals are typically granted for a two-year period or until the applicant's passport expires, whichever is sooner. The approval is good for multiple entries – meaning you may use it for more than one entry into the U.S. ESTA provides validity dates upon approval of the application. A fee will be charged for each new application.