how long do passports last before expiring
Passports issued to children are valid for five years if the child is under the age of 15. Passports issued to adults are valid for 10 years if the individual is over the age of 16. The U.S. government recommends travelers renew their passports at least nine months before it expires, if possible. Passports are renewable by mail if they are undamaged, issued after the age of 16, issued within the last 15 years, and issued in your current name (see Resources).