Contracting in Puerto Rico is acceptable but not common for individuals and has some subtle nuances. There are hidden on-costs for employers. Some local taxes over and above the federal tax and social system apply. To facilitate contractors and foreign nationals working in Puerto Rico, forward planning is of the essence. USA has entered into Double Taxation Treaties with most countries.
For foreign national contract workers, contracting in Puerto Rico, it would be wise to consult with CXC Global on the best way to structure, and how best to balance your taxation.