E-2 Investor Visa
To be classified as an E-2 treaty investor, the applicant must be from a country which has an International Treaty of Commerce with the U.S. In other words, this treaty must be able to confer treaty visa eligibility. (most European Countries qualify) The investor must show that he/she has either made a substantial investment or is actively in the process of making a significant investment of the enterprise.
There is no statutory minimum for the requirement of "substantial" investment. However, the investment must be substantially proportional to the total cost of an established business or the total cost of building a new business. The invested amount varies from business to business. Case in point, for a business in the service field like an accounting firm or law, the investment amount can be as low as $40,000. Such activity is mostly in human resources, rather than in properties or a business such as a restaurant.