METTALLION, né dans le continent, nous façonnons votre croissance dans trois continents”


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Serving American businesses

METTALLION can manage all of your business’ accounting and payroll needs – including preparing monthly management accounts, filing VAT returns and submitting your annual accounts to the French authorities.

Our highly involved team has in-depth knowledge of Franco-American tax treaties and is specialized by area of ​​expertise.

METTALLION supports you throughout the life of your business: creation, growth and also sale/takeover thanks to a team dedicated to the transfer of businesses in France.

You have American business in France or planning to settle there ? You are looking for an experienced Certified Public Accountant (CPA) for your business ?

METTALLION has a team located in Seattle and Paris who provide you with comprehensive and multidisciplinary support.

  • A complete range of accounting services & Tax services tailored to your ambition
  • Specialists close to you to build a relationship of trust
  • Daily support for your project
  • Bilingual CPAs, specialized in US business

As one of the most productive economies in Europe, the number of businesses from both the EU and abroad looking to establish companies in France is continuously growing. From small and medium to even the largest companies, it can be tough to establish a company in France without the help of specialized professionals.

Among others things, accountants can advise entrepreneurs and shareholders on the legal hurdles involved and provide guidance regarding the laws related to filing financial statements, audit requirements or other accounting-related matters.


We are a team of French and American CPAs based in Paris, ready to assist you in your procedures.

We specialize in providing a wide range of services to American companies wishing to develop their business in France or French companies looking to settle in the US or who already has operations in the US.

We have developed specific knowledge and acquired reliable experience in order to provide you numerous accounting services and tax services. We can also refer you to a professional from our team regarding specific legal or financial issues.

Who are we ?

Our dedicated and specialized teams advise and support you on a daily basis in your accounting tasks by adapting to your challenges so you can grow with confidence and serenity.

  • All-inclusive accounting packages, from bookkeeping to preparation of annual financial statements;
  • Monthly or quarterly management reports, in English or French;
  • Business plans and forecasts;
  • Cash flow management support;

Our Mission

  • Support and advice for start-up entrepreneurs and new French businesses;
  • Part-time financial director (CFO);
  • Preparation and filing of corporate tax returns (liasse fiscale), sales tax declarations and all other tax-related documents that require secure electronic transmission;
  • Assistance in case of tax- or social security-related audits;
  • Quarterly tax calculation and processing of payments;
  • Advices regarding executive compensation.