US-Nordic taxes & accounting for you
With 30+ years of specialization in US-Nordic taxation and accounting, we simplify complex rules, ensure full compliance, and provide the guidance you need to make smart financial decisions across borders.
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Photo by M.E. Mousa

Personalized tax & accounting services to fit your needs

Living and working between the US and the Nordics requires financial guidance that understands both sides, and every client's needs are unique. 

At Westmusa, we work closely with individuals and businesses to build tailor-made tax and accounting solutions that remove complexity and ensure full compliance. With teams in New York City and Finland, we offer services in English, Swedish, and Finnish.

The professional team of Westmusa Tax and Accounting services outside in Finland.The professional team of Westmusa Tax and Accounting services outside.

"As an individual tax advisory customer for already 10 years, I can highly recommend the services of Westmusa in international tax matters."

Maarit Bystedt, Director, Corporate Communications, Nasdaq Helsinki

"Westmusa is a reliable and experienced partner in the U.S. market. We value the firm’s willingness to tailor a service package that fits us and will grow with us."

Kristiina Helenius, Director, North America, Nordic West Office

"A diminutive and modest powerhouse of a networker and professional. It seemed that she knew everyone and still does, of the Nordic community in the USA."

Katarina Holm-DiDio, Principal & Coach, KHD Consulting

"I am very grateful for the service and help from Westmusa, Inc, which made my years in New York much easier both in terms of tax issues and good advice in other areas. The service was always fast, friendly and correct, and I highly recommend Westmusa, Inc."

Peter Fellman, Editor In Chief, Dagens Industri

"Professional, proactive, friendly service. Always pleased with the results."

Olli Herrala, Journalist, Finnish Business Daily

"Westmusa has prepared my taxes for the last couple of years and the partnership has been amazing – their expertise, attentiveness, and service are exceptional and I’m looking forward to many more years of partnership."

Lina Hagström, Head of Brand Marketing, Smartly

"Thanks again for the excellent service! This was a fast and smooth process."

Jussi Lemilainen, Operator Business Segment Lead, Wireless Devices & Operators, Keysight Technologies, Inc

Westmusa for businesses

  • Tax Preparation & Planning for US-Nordic operations
  • Accounting & Bookkeeping, including US GAAP reporting for foreign subsidiaries
  • Entity Formation & Market Entry Support (LLC vs. C-Corp guidance)
  • Corporate Tax Compliance, including federal and state returns
  • Sales Tax & Nexus Advisory for e-commerce and SaaS companies
  • Payroll & HR Compliance for managing US employees from abroad
Westmusa International Tax Accountant Viktor Westerlund working on his laptop.

Westmusa for individuals

  • US Tax Return Preparation for expats and non-residents
  • Cross-Border Tax Planning using US–Nordic tax treaties
  • Relocation & Expatriation Guidance when moving to or from the US
  • Foreign Asset Reporting (FBAR, FATCA) to avoid penalties
  • Stock Option & Equity Taxation for cross-border compensation

Why Westmusa

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Artistic photos: ©Mousa Photography