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About Us


GVSTAX provides discreet, structured advisory for clients establishing, managing or expanding their Swiss business presence. We combine Swiss expertise, international perspective and practical execution for tax, accounting and business decisions.







GVSTAX

 

Independent Swiss Tax & Business Advisory


GVSTAX is an independent advisory firm based in Zug, supporting entrepreneurs, expats and companies with Swiss company formation, tax, accounting, VAT and international advisory matters.


We combine Swiss expertise, international perspective and practical execution to help clients structure their business correctly, understand their obligations and make informed decisions in Switzerland and across borders.

Visit us in Zug

Our Approach

 


Structured advice. Practical execution. 

Long-term perspective.


At GVSTAX, advisory is not limited to isolated answers. We connect company formation, tax, accounting, VAT and cross-border considerations into one structured view.


Our role is to help clients identify the right setup, organise the necessary documentation, comply with regulatory requirements and build a reliable foundation for business activity in Switzerland. We work with discretion, precision and a practical understanding of the challenges faced by internationally mobile individuals, entrepreneurs and growing businesses.

WHY GVSTAX

What We Support

 


Swiss and Cross-Border Business Matters


GVSTAX supports clients across four core areas:


  • Company Formation & Domicile
    Support with Swiss company setup, domicile in Zug, Trade Register registration, bank account opening coordination and first compliance steps.


  • Tax & Accounting Services
    Personal and business tax support, bookkeeping, financial statements, accounting review and advisory for Swiss business operations.


  • International Tax
    Cross-border tax review, international planning, foreign income and asset considerations, and advisory for internationally active individuals and companies.


  • VAT Advisory
    Swiss and EU VAT review, VAT registration, import/export matters, e-commerce VAT considerations and cross-border compliance support.

our services

Professional Background

 

Swiss expertise with international experience


GVSTAX brings together technical tax and accounting knowledge with a practical understanding of international business structures.


The firm is particularly focused on clients who require support beyond standard local compliance — including expats, foreign entrepreneurs, internationally mobile individuals, Swiss-based companies with cross-border activity and businesses entering the Swiss market.


This international perspective allows GVSTAX to identify relevant tax, accounting and VAT considerations early and help clients avoid costly gaps in structure, documentation or compliance.

Our Expertise

_________

About the Founder

 A Zug-based professional advisory firm 

for individuals, entrepreneurs and businesses building their financial presence in Switzerland. 

Ms. Olesea Mehr-Cossa, LL.M. is the Founder and Managing Director of Global VAT & Strategies GmbH (GVSTAX). She is a qualified accounting and tax professional with more than 10 years of international advisory experience, including Big Four experience, specialising in Swiss, Luxembourg and cross-border tax, VAT, accounting and business advisory matters.

Her work combines technical expertise with a structured and pragmatic approach. She supports entrepreneurs, companies and international clients in understanding their tax and regulatory obligations, making informed business decisions, and establishing and maintaining a compliant business presence in Switzerland.


Her professional qualifications and memberships include:

  • Expert Member of EXPERTsuisse, Switzerland
  • Licenced Auditor (Revisorin) registered with the Swiss Federal Audit Oversight Authority FAOA (RAB / ASR) — Auditor Licence No. 114522
  • LL.M. in International and European Tax Law, Maastricht University
  • More than 10 years of international tax and advisory experience, including experience within a Big4 multinational professional services firms.

Her approach is structured, confidential and practical, with a strong focus on providing clients with clear advice and workable solutions.


For an initial consultation or to discuss how GVSTAX can support your business:

mehr@gvstax.ch

Connect via LinkedIn

Why GVSTAX

 Swiss expertise. International perspective. Practical execution.

Structured from the start

Practical, confidential support

Practical, confidential support

We help clients establish the right foundation before decisions become costly — from company formation and domicile to tax, accounting and compliance setup.


Practical, confidential support

Practical, confidential support

Practical, confidential support

Clients receive clear next steps, organised documentation and discreet advisory support designed for real business implementation.

Built for cross-border realities

Built for cross-border realities

Built for cross-border realities

Many clients have foreign income, assets, EU clients or international business activity. GVSTAX helps identify Swiss and cross-border implications early. 

Maximise Your Results

Built for cross-border realities

Built for cross-border realities

Work with an advisor who understands Swiss setup and international complexity. 

Based in Zug. Built for international business.

Zug is one of Switzerland’s most attractive locations for entrepreneurs, holding companies and internationally active businesses. Its strong business environment, central location and international outlook make it a natural base for Swiss and cross-border advisory. 


Supporting clients across Switzerland.

We assist individuals, entrepreneurs and companies across Switzerland with tax, accounting, VAT and business setup matters. 

For expats, entrepreneurs and cross-border clients.

Individuals and businesses arrive in Switzerland with foreign income, assets, business interests or international tax questions.


GVSTAX helps individuals and businesses review their Swiss position, identify cross-border implications and establish a structured path for company formation, tax filing, accounting and VAT compliance. 

Our Technology

 Modern systems for reliable compliance in Switzerland and internationally. 

GVSTAX uses modern accounting systems and specialised VAT tools to support efficient compliance, reliable reporting and transparent financial data.


 This technology-driven approach helps clients maintain accurate records, monitor obligations and make informed business decisions based on up-to-date financial information. 

Professional Associations

Associations support us internationally & locally

Contact

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Co-Working & Business Center: Chamerstrasse 172, 6300 Zug, Switzerland Email: office@gvstax.ch I Tel: +41 76 713 97 00 www.gvstax.ch




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