Katie Porritt joined Moore Doeren Mayhew in October 2020, bringing with her over 25 years of international tax experience with Big Four firms. She has a depth of knowledge in global tax compliance for expatriates, foreign nationals, and cross-border commuters, and has managed service delivery to over hundreds of international assignees working in several countries.

Katie’s specialties include:
  • Individual income tax returns and equalizations for international and domestic assignees
  • Foreign bank and investment account reporting
  • Developing equalization policies
  • International compensation reporting
  • Providing international tax expertise related to treaty application and social security agreements
  • Consulting with international assignees on investment and estate planning to minimize worldwide taxes


  • Global Mobility Services