Tadico

Tadico has spent two decades helping individuals and businesses work through taxation in Switzerland-Germany and Switzerland-France transitions. The firm works with expats, commuters, and companies handling assets across these borders, addressing the specific withholding rules, wealth taxes, and cantonal regulations that apply.

They're a good fit if you're relocating between Germany or France and Switzerland and need ongoing compliance rather than one-off filings. The long track record and geographic focus beat generalist tax advisors when treaty rules and dual-country obligations intersect.