With more than 13.9 million passport books issued in 2015 and 1.65 million passport books, some simple math tells us that passports accounted for at least 1.5 billion USD in revenue. Of course this is a ball park and I haven't seen any actual breakdown from the Department of State for the passport fees collected. This figure does not include expedite fees or file search fees. The 1.5 Billion figure assumes all 13.9 million passports were adult passports and none were child or free passports. I also did not include revenue generated from passport cards.