The U.S. Department of State will no longer be adding pages to U.S. passports beginning January 1, 2016. Previously, U.S. passport holders had the option to pay for the insertion of 24 additional passport pages when valid passports lacked adequate space for entry or exit visa stamps. The decision to discontinue this service was made to enhance the security of the passport and to abide by international passport standards.
To mitigate the impact of no longer providing additional passport pages to frequent travelers, the Department of State began issuing 52-page passports to all applicants outside the United States starting October 1, 2014, for no additional cost. Applicants within the United States may choose a 28-page or 52-page book.