ExpatTax Switzerland


Tel: + 41 (0)32 623 30 55

ExpatTax Switzerland is a service of Bonfina Treuhand GmbH.

We are an innovative fiduciary company located in Solothurn, Switzerland and are committed to providing expatriates in Switzerland professional and friendly services at affordable rates.

We are a small team of qualified consultants and we intend to keep it small and nimble, concentrating our efforts to do one thing best – provide quality and personal services with great customer focus. We take our personal commitment to meet the needs of our clients to heart. 

Providing tax services to individuals and corporations is one of our core business activities. In this field, we have geared our service specifically to expatriate needs. Other services include audit, accounting and business consultancy.

taxteam@expattax.ch | View website | View on map

Key Investment


Address: Industriestrasse 2, 7208 Malans

Tel: +41 81 322 11 22

The complexity of the insurance, banking, and tax systems in Switzerland can be daunting for non-Swiss professionals living in Switzerland whose financial future and security depends on a sound understanding of them. Key Investment was formed primarily to support HR departments and their foreign staff in using the Swiss system to their best advantage.

Company owner Brien Donnellon, a British/Swiss national, registered Key Investment in 1997 and brings with him years of experience from the banking and insurance industry.

info@keyinvestment.ch | View website | View on map

Taxes for Expats


At TFX we have been preparing taxes for U.S. expats for over 25 years.

While an average tax preparer or CPA may prepare returns for only a handful of clients living abroad, our business is 100% dedicated to them. This focus enables us to provide best in class service at very competitive rates.

We created a simple tax return process that makes filing your US taxes a breeze. Clients simply upload relevant documents to our secure server and we take care of the rest.

We offer the same level of service online that you would receive by visiting our office - without having to leave your home. We make customer service our highest priority - and are always ready to answer your questions.

Living abroad presents enough challenges - filing your U.S. taxes shouldn't be one of them.

TFX received a TrustScore of 9.5 out of 10, based on more that 350 reviews.

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