If your contractor is selfemployed (a sole proprietor in their country), you'll need them to fill out Form W8BEN. Understand tax requirements when hiring a foreign contractor.Our guide provides essential insights for seamless compliance with international tax laws. IDES supports the temporary Alien Employment Certification Program under an annual grant from the US Department of Labor. In this guide, we'll walk you through everything you need to know about bringing a selfemployed worker on board, wherever they are in the world. All US employers must properly complete Form I9 for every individual they hire for employment in the United States. This includes citizens and noncitizens. All employers are required to report new employees to their state's New Hire Directory with 20 days of the employee's first day on the payroll. The contractor completes all relevant forms in the Packet and any necessary immigration forms. Industrial Maintenance Mechanic.