Add 10 years to the date of issuance if you were over 16 when you got the passport, or five years if you were 15 or younger. For instance, if you received a passport in November 2004 at age 25, your passport expires in November 2014.If you got the passport at age 14, it expired in November 2009.hen you can't find your passport or cannot access it temporarily, it may still be possible to calculate when the travel document will expire. A passport's expiration date is determined by its date of issuance and your age at the time your application was processed.