Alina, who is a student in Germany, was paid in cash for a weekend of sex with the Italian businessman after she auctioned her virginity online.
However, tax officials in Berlin regard the 18-year-old's act as 'nothing more than prostitution'.
Prostitution is legal in Germany but hookers are taxed at 50 percent of their earnings, reports The Sun.
The computer studies student's visa allows her to work in Germany for 90 days - even as a prostitute.
But because Alina earned so much in such a short time she may also be liable for a hefty VAT bill.
A German inland revenue spokesman said: "If we have hard figures then we can make an accurate assessment."
One German tax expert said: "By the time they've had half in income tax and some in VAT she'll be lucky to have a couple of thousand left for her effort."
Immigration officials are also checking Alina's visa status to see if she should even be working. If she arrived in the country with just a tourist visa she could be deported for working without a permit. (ANI)