Professional Limited Liability Company PLLC Professional Limited Liability Company PLLC Gesellschaft mit beschränkter Haftung für Freiberufler Société à responsabilité limitée professionnelle プロフェッショナル有限責任会社 Sociedade Limitada Profissional 专业有限责任公司 PLLC A professional limited liability company ('PLLC') is a U.S. business entity designed for licensed professionals, such as lawyers, doctors, architects, engineers, accountants, and chiropractors. While many businesses choose to form a limited liability company ('LLC') because of the tax, limited liability, and other benefits, some states don't allow LLCs to be owned by professionals whose occupation requires a license. In these states, licensed professionals who want the benefits of an LLC must form a PLLC instead.