---
title: "Tax and Social Security"
id: "11945"
type: "area"
slug: "tax"
published_at: "2022-11-25T12:07:33+00:00"
modified_at: "2025-10-07T17:02:27+00:00"
url: "https://www.caiadoguerreiro.com/en/area/tax/"
markdown_url: "https://www.caiadoguerreiro.com/en/area/tax.md"
---

# Tax Law and Social Security

Everyone is subject to Tax Law since it regulates the legal aspects of taxes while protecting the rights of citizens.

Caiado Guerreiro has a diversified and globalised tax practice with a long-standing national and international capacity.

The firm offers innovative tax solutions for a wide range of clients and operations, including national and multinational corporate groups, small and medium enterprises, foundations, real estate investment funds and private clients, always with a deep commitment to advancing and promoting our client’s interests, supporting them with a personalised tax advisory activity.

We are also heavily involved in restructuring operations, mergers and acquisitions and foreign investment transactions. In addition, we have extensive experience in international VAT, Customs duties and other indirect taxes in multiple jurisdictions.

From a tax perspective, optimising our client’s investments is one of the core activities of our practice.

## Tax Litigation

Caiado Guerreiro’s Tax Litigation Department draws on extensive experience in agricultural, construction, retail, hotel, property development, and financial services sectors, providing a strategic advantage in supporting clients’ professional activities.

Our team is uniquely positioned to guide clients through all stages of the tax procedure, offering proactive prevention and effective dispute resolution.

## Specializations

- Consulting
- Tax Litigation
- Private Clients

## Contacts

[https://www.caiadoguerreiro.com/en/advogados/tiago-caiado-guerreiro/](https://www.caiadoguerreiro.com/en/advogados/tiago-caiado-guerreiro/)

### [Tiago Caiado Guerreiro](https://www.caiadoguerreiro.com/en/advogados/tiago-caiado-guerreiro/)

[tguerreiro@caiadoguerreiro.com](mailto:tguerreiro@caiadoguerreiro.com)

[More Info](https://www.caiadoguerreiro.com/en/advogados/tiago-caiado-guerreiro/)

[https://www.caiadoguerreiro.com/en/advogados/ana-castro-goncalves/](https://www.caiadoguerreiro.com/en/advogados/ana-castro-goncalves/)

### [Ana Castro Gonçalves](https://www.caiadoguerreiro.com/en/advogados/ana-castro-goncalves/)

[agoncalves@caiadoguerreiro.com](mailto:agoncalves@caiadoguerreiro.com)

[More Info](https://www.caiadoguerreiro.com/en/advogados/ana-castro-goncalves/)

[https://www.caiadoguerreiro.com/en/advogados/duarte-moreno-murtinha/](https://www.caiadoguerreiro.com/en/advogados/duarte-moreno-murtinha/)

### [Duarte Moreno Murtinha](https://www.caiadoguerreiro.com/en/advogados/duarte-moreno-murtinha/)

[dmurtinha@caiadoguerreiro.com](mailto:dmurtinha@caiadoguerreiro.com%20)

[More Info](https://www.caiadoguerreiro.com/en/advogados/duarte-moreno-murtinha/)

## Team

- [Laura Gaudêncio Borges](https://www.caiadoguerreiro.com/en/advogados/laura-gaudencio-borges/) Associate Lawyer
- [Joana Jawa](https://www.caiadoguerreiro.com/en/advogados/joana-jawa/) Associate Lawyer
- [Pedro Ranito Chaves](https://www.caiadoguerreiro.com/en/advogados/pedro-ranito-chaves/) Associate Lawyer
- [Alexandra Abalain](https://www.caiadoguerreiro.com/en/advogados/alexandra-abalain/) Associate Lawyer
- [Inês Evangelista Bastos](https://www.caiadoguerreiro.com/en/advogados/ines-evangelista-bastos/) Associate Lawyer
- [Sara Godinho Barão](https://www.caiadoguerreiro.com/en/advogados/sara-godinho-barao/) Trainee Lawyer
- [Afonso Góes Palhete](https://www.caiadoguerreiro.com/en/advogados/afonso-goes-palhete/) Trainee Lawyer

## Related communication

- [VAT in International Transactions: When Should You Charge VAT?](https://www.caiadoguerreiro.com/en/vat-in-international-transactions-when-should-you-charge-vat/) 17 / 07 / 2026
- [The Inheritance the Portuguese Tax Authority Should Never Have Taxed](https://www.caiadoguerreiro.com/en/the-inheritance-the-portuguese-tax-authority-should-never-have-taxed/) 03 / 07 / 2026
- [Between Tax Relief and Flexibility: The PPR Dilemma in IRS](https://www.caiadoguerreiro.com/en/between-tax-relief-and-flexibility-the-ppr-dilemma-in-irs/) 19 / 06 / 2026

## Other practice areas

- [Banking, Commercial and Corporate](https://www.caiadoguerreiro.com/en/area/banking-commercial-and-corporate/)
- [Corporate, Labour and Insurance](https://www.caiadoguerreiro.com/en/area/corporate-and-labour/)
- [Energy, Natural Resources and Mobility](https://www.caiadoguerreiro.com/en/area/energy-natural-resources-and-mobility/)
- [Family and Succession](https://www.caiadoguerreiro.com/en/area/family-and-succession/)
- [Immigration](https://www.caiadoguerreiro.com/en/area/immigration/)
- [Intellectual Property, Media and Technology](https://www.caiadoguerreiro.com/en/area/intellectual-property-media-and-technology/)
- [Litigation and Arbitration](https://www.caiadoguerreiro.com/en/area/litigation-and-arbitration/)
- [Public Law](https://www.caiadoguerreiro.com/en/area/public-law/)
- [Real Estate, Urban Planning and Hospitality](https://www.caiadoguerreiro.com/en/area/real-estate-and-urban-planning/)
- [Regulatory, Healthcare and EU Law](https://www.caiadoguerreiro.com/en/area/regulatory-competition-and-eu-law/)