RATE -- Last year a RAND Corp study of the Pentagon estimated that there are between 1,320 and 6,630 transgender troops among an active-duty force of 1.3 million. The study estimated that somewhere between 30 and 140 of those active-duty troops might want hormone treatment, and potentially 25 to 130 might seek gender reassignment surgery.
The cost? Somewhere between $2.4 million and $8 million annually. Another expert on the subject, Aaron Belkin, a professor of Political Science at San Francisco State University estimated in 2015 that the cost is about $5.6 million annually.