It costs $110 to renew an adult's American passport or $140 to renew a passport book and passport card, as of October 2015. To renew an American passport for a child, it costs $80 for the book or $95 for the book and card. Both require a $25 acceptance fee.
The Passports & International Travel section of the website for the U.S. Department of State provides a detailed list of fees, schedules and forms for all passport and international travel needs. The United States Passport and Travel website also provides an office locator tool to determine the closest application facility based on ZIP code. The National Passport Information Center is available by phone from 8 a.m. to 10 p.m., Monday through Friday, at 877-487-2778.