Zadal - Abogados y Asesores Tributarios | Zadal Abogados y Asesores Tributarios | English version
Zadal Abogados y Asesores Tributarios | English version
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About us

We are a boutique business law firm specialized in Tax Law and Private Wealth Management. 

Each of our partners has a solid professional career and accumulates a wide experience of more than 15 years standing out for their technical capacity, an aspect that has led them to be part of prestigious directories such as Chambers. 

Our entire team has worked in international firms such as Cuatrecasas, Garrigues, Baker McKenzie, Ecija or PWC. 

Our commitment to quality and excellence translates into the generation of value for our customers, with whom we like to establish a long-term relationship based on trust. 

In our daily work we are driven by honesty, self-demand and we work as a team with the common goal of exceeding the expectations of our customers. 

What we do


General Taxation

  • Ongoing advice for both companies and individuals.
  • Tax policy for companies and groups.
  • Tax planning in mergers, acquisitions and restructuring operations.
  • Wealth structuring.
  • Financial products.
  • Consolidated tax groups.
  • Due diligence in sale and purchase processes.
  • Submitting consultations before the Directorate-General of Taxation.
  • Tax efficient remuneration schemes.

Private Client and Wealth Management

  • Advice on HNW individuals and families. 
  • Management of family and business assets.
  • Succession planning and family business. 
  • Internal and international mobility. 
  • Advice on private equity and venture capital investments, as well as financial investment management. 
  • Tax litigation in the field of wealth and/or family management. 

Indirect Taxation

  • Tax advice and tax planning services on indirect taxes and customs duties.
  • VAT deductions.
  • Special regimes (VAT groups).
  • Foreign and intra-Community trade transactions.
  • Excise duty.

Tax Proceedings and Litigation

  • Advice and defence of the interests of individuals and companies before the tax authorities.
  • Inspection proceedings and tax information requests, economic-administrative and contentious claims and appeals.
  • Criminal-economic proceedings, particularly in crimes against the Treasury.

International Taxation

  • Planning of efficient company tax structures.
  • Advice on and planning for Spanish investments abroad, as well as for foreign investments in Spain.
  • Planning for internationalisation processes.
  • Advice to expatriates.
  • Advice on EU tax law and its implications for domestic law and monitoring of all EU legislative initiatives and of the impact of CJEU case law on tax matters.
  • Tax residency.

Startups and Entrepreneurs

  • Tax efficient investment and exit.
  • Wealth planning.
  • Tax planning for individuals and family-owned businesses.

Debt Finance law


  • Direct Lending, in several areas: real estate, finance; senior, mezzanine. 
  • Real estate financing transactions.
  • Due Diligence in several king of transactions, including financings.
  • Ongoing advice to financial entities and companies.
  • Legal advice to agents. Review and closing coordination. 
  • International financings. Spanish parts of the transactions. Coordination of several jurisdictions. 

Non-Performing Loans (DISTRESSED MARKET)

  • Assistance in Non-Performing Loans transactions, both in portfolios and single names. Primary and Secondary markets.
  • Assistance in refinancing and restructuring transactions. Special Situations.
  • Assistance to final investors and servicers.
  • Management and restructuring of complex positions in non perfoming loans acquired
  • Assistance in international transactions, with several jurisdictions involved.
  • Coordination of holding structures, including Luxembourg.


Our Team

Constantino Vidal Ruiz de Velasco

Constantino Vidal has an extensive professional career in corporate tax advice, mergers and acquisitions, cross-border transactions, restructuring and private banking and Wealth Management, both nationally and internationally. 

Constantino started his career at Garrigues, then he moved to the Financial Taxation area at Cuatrecasas and was head of Tax at Ecija. 

Recommended by several directories, including Chambers HNW (2021). 

Constantino is a member of the Madrid Bar Association and member of the Association of Economists of A Coruña, and professor and lecturer at different educational institutions and business schools. 

Bachelor of Laws, Bachelor of Business Administration and Management, LLM in Business Tax Consultancy from the IE Law School. 

Constantino speaks English and Spanish. 

Antonio Paredes

Antonio Paredes has a long and solid career as a Debt Finance lawyer. 

His main focus has been in the financing transactions, including the Direct Lending, Non Performing Loans, financings in corporates, real estate, acquisition, restructuring and project finance transactions. 

He started his professional career in Cuatrecasas, developing an intense 12-year-career in the Debt Finance law Madrid department. 

Member of the Madrid Bar Association. He is also a lecturer and collaborator at the Master in International Advocacy at Universidad Carlos III and in the Law Grade and International Advocacy Master at the ISDE Law & Business School (Madrid).

He speaks English and Spanish.

Antonio Cendán Fernández-Peinado

Antonio Cendán has an extensive professional carrer as a tax lawyer. He focused his professional career on tax litigation, corporate tax advice and private wealth management. 

LLB from University of A Coruña, LLM in Business Tax Consultancy from the IE Law School, Executive Master in Business Law by Centro de Estudios Garrigues and Harvard Law School. 

He started his professional career at Garrigues and also worked in other international law firms. 

He is a member of the Spanish Association of Tax Consultants (AEDAF) and the Lugo Bar Association. Antonio is also professor and lecturer at the Master in Lawyering by University of Santiago de Compostela. 

He speaks English and Spanish. 

Nazario Mendoza Garcés

Nazario Mendoza has a broad professional career in tax planning, both nationally and internationally. Specialized in VAT taxation, corporate tax advice and private wealth management. 

LLB from the University of Zaragoza, LLM in Business Tax Consultancy from the IE Law School, Executive Master in Business Law by Centro de Estudios Garrigues and Harvard Law School.  

Started his career at Garrigues, then he moved to the Taxation area at Ecija as a partner. 

Nazario is a member of the Zaragoza Bar Association and the Spanish Association of Tax Consultants (AEDAF). 

Nazario speaks Spanish, English and Italian. 

Román Mejías Rodríguez

Román Mejías, a graduate in Law and Economics from the University of Navarra, has a broad and solid career in the Finance law practice.

He started his career in Cuatrecasas, in the Debt Finance law Madrid department, where he has worked for the last 7 years.

With a special focus on high-end financing transactions, Román works regularly with clients in Spain and international clients, especially in London. Román has the ability to build trust with his clients, who value his experience and ability to work.

Román speaks English and Spanish.

He is a member of the Madrid Bar Association.

Alejandro Fernández Oliva

Alejandro Fernández is a Tax Lawyer with experience providing tax advice to companies and private clients, both nationally and internationally. 

Prior to joining ZADAL, he developed his professional career in Ecija. 

He is graduated in Law and Business Administration and Management at the University Carlos III from Madrid, and he specialized in tax advice with a Master´s Degree in Tax Advice and Law Practice by the Centre for Financial Studies from Madrid. 

As part of his commitment with continuous training, he coursed several executive programs at IE Law School, among others. 

Alejandro is member of the Madrid Bar Association. 

Carlos Saldaña Alarcón de la Lastra

Carlos Saldaña has an experience of over 10 years providing tax advice on mergers acquisitions, group restructurings, along with tax implications for real estate transactions. During his career he has provided advice regarding tax structures for both national and international clients. Additionally, Carlos is specialized in providing tax advice to Private Clients. 

Previous to joining ZADAL, Carlos was a senior associate in Ecija’s tax team and has also worked for Roca Junyent and PwC. 

He has a Law Degree and a Diploma in Business Studies by the Comillas Pontificial University (ICADE E1) and has a LLM in Tax Advice by the IE Law School. 

Member of the Madrid Bar Association. 

Roger Tort Josa

Roger Tort is a senior associate with more than 10 years of experience in tax advice specializing in providing advice to international and domestic clients in reorganization, tax planning transactions and wealth management.  

Prior to joining ZADAL, he developed his career in Cuatrecasas, Baker McKenzie and Laffer Abogados.  

Roger is a regular speaker in tax courses organized by the Financial Studies Foundation (PSPG – Wealth Tax Planning) and he is professor of the International Master’s Degree in Tax Consultancy at ISDE.  

Law Degree at Universitat de Barcelona a Master’s Degree in Taxation from Escuela Superior de Administración y Dirección de Empresas (ESADE). 

Member of the Madrid Bar Association.  

Chelo Vicente

Chelo Vicente has more than 17 years of experience in the receptionist position. Started her career organizing conferences in the hotel sector. Then she worked as a receptionist at Ecija, providing day-to-day support to the management and other areas of the office.  

Chelo finishes the first three-year cycle of English Philology and several training courses in office automation and accounting.  

At ZADAL she works as an Office Manager since September 2021, when she joins the Firm. 


  • Zadal relaunches its activity as a specialised tax boutique




Alfonso XII 22 – 4º I | 28014 MADRID

Phone: 917 373 730 | Email:





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