Simon Misiewicz

Simon is a dual-qualified UK and US tax specialist with over 20 years’ experience supporting accountants and financial advisors through white-label tax services, training, and advisory work. He partners with UK and US tax professionals, including wealth managers, helping them navigate the complexities of cross-border taxation, compliance, and reporting. Recognised by the U.S. Internal Revenue Service (IRS) as an Approved Continuing Education Provider, Simon is authorised to design, deliver, and report official CE programs for Enrolled Agents, tax preparers, and international tax professionals. His expertise encompasses cross-border UK–US taxation, representation before the IRS, ethical practice management in line with IRS Circular 230 and HMRC standards, and international reporting obligations such as FATCA, FBAR, PFIC, and FIRPTA. Simon equips accountants to advise clients confidently on US expansion while ensuring full compliance with both UK and US regulations.