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Tax

Future facing law firm delivering comprehensive tax solutions across jurisdictions

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Tax is core to your business and CMS is a one-stop-shop for all your tax challenges across the world. We ensure that clients have access to hands-on experience and skills needed to communicate effectively with tax authorities and to resolve tax issues swiftly and efficiently.

CMS Tax at a glance:

150+ tax partners, 500+ tax lawyers & advisors globally;
Members of International Bar Association & International Fiscal Association;
We advise on mergers & acquisitions, transfer pricing, VAT, dispute resolution, international taxation and private clients.
Our team is qualified to handle tax disputes with ax authorities and before tax tribunals and we have a strong track record of advising organisations on the tax structuring of important projects, using a solution-oriented approach.

Businesses deal with national and international tax issues on a daily basis, against an increasingly complex legal background. Tax authorities are imposing greater compliance burdens and governments are seeking new sources of tax revenue.

What sets us apart is the way we deliver our tax advice to you: we offer deep local expertise, combined with industry specialisation, by international, like-minded experts who know each other well and work together regularly.

CMS advises you on all business tax issues:

  • Mergers & acquisitions
  • Transfer pricing
  • VAT
  • Dispute resolution
  • International taxation
  • Private clients

We advise on contentious as well as non-contentious matters, including disputes with tax authorities through administrative procedures and before tax tribunals.

CMS has a strong track record of advising organisations on the tax structuring of important projects, using a solution-oriented approach.

Please reach out to any of our tax lawyers to explore solutions to your tax needs.

Tax and your business strategy

Highlighted experience

  • A top 30 global Oil & Gas company

    Advice on the full suite of corporate income tax, VAT, withholding tax, personal income tax and social contributions in Romania, as well as providing assistance with tax compliance in connection with their activity in Romania.

  • ADS-TEC Energy GmbH

    Advice on its business combination with European Sustainable Growth Acquisition Corporation.

  • BetFair

    Providing legal assistance and regulatory and tax law advice in Montenegro to the world’s biggest international online sports betting company, listed on the London Stock Exchange since October 2010.

  • BioNTech SE

    Advice on the tax issues related to the acquisition of a manufacturing facility to expand the production of COVID-19 vaccine.

  • Cloud services provider

    Advice across 30 countries worldwide to analyse the VAT/ GST treatment of services rendered by the group to their customers, whether a local Digital Services Tax be applicable and the mandatory information to be included on the invoices.

  • Energy group

    Advice on tax aspects of several investment projects in renewable energy in the LatAm region (Chile, Colombia and Peru) including tax due diligence, tax structuring of the investment and of its financing, and review of tax aspects of contractual documentation.

  • Equistone

    Advice on the tax aspects of the acquisition of a majority stake of a major European manufacturer of aluminium gates and doors.

  • Framatome

    Advice on a complex legal and tax due diligence as well as negotiation of the SPA, including tax warranties and indemnities formulated based on the findings of the tax DD.

  • French energy multinational

    Advice on a successful claim against the Spanish State in relation to the recovery of undue tax payments.

  • Infobip

    Advised the global leader in omnichannel engagement on the transfer pricing study for their Serbian subsidiary.

  • Invesco Real Estate

    Advice on the preparation and implementation of the sale of the “Prime Four” residential portfolio, including advice on tax clauses.

  • KIVA

    Advice on the tax and foreign exchange treatment of payments received through the web page and payments made to microfinance institutions. Analysis of its operation in Colombia and the United States to achieve tax efficiency in both countries.

  • Leading e-commerce platform provider

    Advice on its e-commerce platform launch in Poland, including the design and implementation of the e-commerce model. Advice on the tax implications of the implementation of its business model in Poland and on tax aspects of distance selling, electronic payments and other tax and regulatory issues.

  • Listed insurance group

    Advice on ongoing tax services to its Spanish branches in relation to its day-to-day Spanish business, including all direct taxation matters as well as indirect taxation, insurance specific taxes and preparation and filing different tax returns in the different Spanish territories (common and foral territories).

  • Nordex

    Advice on all legal and tax aspects of the sale of the European wind and photovoltaic project development portfolio to RWE.

  • Oracle

    Advice on an administrative lawsuit against the unfavourable second instance tax resolution in Serbia.

  • Plastic Omnium

    Advice on the establishment of a joint venture in the field of hydrogen mobility with automotive supplier ElringKlinger.

  • Shell

    Advice on the acquisition of 100% of shares of the virtual power plant (VPP) operator Next Kraftwerke GmbH.

  • Major global energy company

    Ongoing advice on a significant MAP case (Mutal Agreement Procedure) between Norway and UK.

  • Turn/River Capital

    Advice on its EUR 314m acquisition of Redwood, an international tech automation solutions group.

Case studies

Ariston Group is a global leader in thermic comfort and energy efficiency. With over 7,400 employees, the company sells products in over 150 countries worldwide. As a result, the business has significant tax considerations and transfer pricing requirements. 

CMS advises Ariston Thermo Group on recurrent and extra-ordinary requests in tax and transfer pricing in over 40 countries, including Italy, Germany, Belgium, China, France, Romania, Russia, Spain, UK, the Netherlands, Indonesia, Vietnam. Our advice has included:

  • planning and implementation of the Group transfer pricing policy; 
  • review of the Research & Development division; 
  • global compliance and preparation of Transfer Pricing studies for the Ariston Division entities; 
  • business restructuring projects to reshape the Group footprint; 
  • support in the audit and settlement procedures in several key jurisdictions; 
  • assistance in managing Mutual Agreement Procedures in Europe.

A French listed company acquired the industrial business of a US organisation operating internationally. CMS tax advice relating to France, UK and India was instrumental to a successful acquisition for our client. 

The management of tax risks was technically and commercially complex – the acquired business was carved out before the deal was completed so it was separated legally and operationally from the rest of the business (which was retained by the seller). Our advice included: 

  • tax due diligence; 
  • the review and negotiation of the legal documentation; from a tax perspective; 
  • the structuring of the acquisition; 
  • the anticipation of the post-closing restructuring.
Awards & Recognitions
01
  • Quote
    Clients praise the team for its client service, highlighting in particular its “responsiveness and ability to quickly mobilise large teams.
    Chambers Europe 2023
  • Quote
    Another client appreciates the team’s “brilliant knowledge of the subject, excellent personal treatment and well-crafted solutions.
    Chambers Europe 2023

Events

  • International
    28 Jan 2026

    TMT Finance EMEA 2026

  • International
    03 Mar 2026

    IP Insights webinar series 2026

  • International
    19 Mar 2026

    CMS Nordic Health Summit

  • International
    23 Mar 2026

    CMS at PTMG Spring 2026

  • International
    21 Apr 2026

    On the Pulse webinar series 2026 - Spring

Local market knowledge. Global outlook

We provide future-facing legal advice to help your organisation thrive. Combining local market knowledge and a global perspective, and with lawyers in locations worldwide, your organisation benefits from the expertise it needs, even across borders.

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