Like every career, the porn industry has its ins and outs, which make calculating how much a porn star earns hard to estimate.
Famous people are often offered vast sums to appear in porn videos. Debbie Wasserman Shultz, for example, was offered $50,000 by the porn site XHamster to appear in a video. But offers like that are not the norm.
How much an adult film star earns per video can depend on a lot of factors, such as:
Type of scene being produced (e.g., solo, girl-girl, boy-girl, etc.)
Sexual acts (e.g., nude, insertions, anal sex)
How the content will be released
According to above factors, top talent can earn per video as below:
Nude-only solo: $340
Open leg solo: $408
Explicit solo: $476
Insertions solo: $612
So, you should pay $340 to the girl for an amateur scene.