Depends on their rank and number of years of service. I am a Major and 23 years of service so I am paid roughly one-third of what I am worth. Happily, there are bonuses...which doubles my pay. So, by the time you pay taxes...most PAs essentially work for free.
You’ll need to work with an AMEDD recruiter. Direct commission as a 1LT or higher depending on years of experience. Student loan repayments and bonuses available. Pro pay and board certification adds about $1k/mo on Active Duty. Prorated in AR and NG.