When you think about going to university to study law, it’s easy to imagine yourself in a courtroom defending someone in a criminal trial or negotiating a multimillion-dollar contract. But the legal world is much broader than that, and it includes specialisations you may never have considered. One of the most attractive, and one with particularly strong career prospects, is tax law.
How are winnings from an international eSports tournament taxed? What taxes does a streamer pay after moving abroad? What about a tech startup selling products or services in a hundred countries? All of these questions are part of what tax law deals with.
If you’re interested in law and thinking about what to study after secondary school, it’s worth finding out what tax law is, what career opportunities it can open up, and how you can study it. In this article, we’ll mainly consider tax law in Spain, but many of the concepts are applicable internationally.
At Esade, for example, there are several ways to prepare for a career in this area. The Bachelor in Law, the Double Degree in Business Administration and Law, and the Double Degree in Law and Global Governance, Economics & Legal Order offer three different routes. At the end of the article, we’ll help you work out which option is the best fit for you.
What is tax law?
A simple definition of tax law would be this: it’s the branch of law that governs the taxes, fees, and other compulsory contributions that individuals and businesses must pay to public authorities in order to fund public services.
Put another way, it sets out who has to pay, how much they have to pay, when they have to pay, and how payment should be made. It also defines taxpayers’ rights and the obligations of tax authorities.
The difference between tax law and fiscal law
In everyday language, tax law and fiscal law are often used almost interchangeably. Both refer to the rules governing taxes, taxpayers’ obligations, and their relationship with public authorities. Even so, there is a subtle distinction:
- Tax law focuses specifically on taxes, fees, and compulsory contributions.
- Fiscal law, by contrast, is often used more broadly to refer to the practical application of those taxes, including tax administration, collection, and planning within the legal framework.
Principles and sources of tax law: the foundations every tax specialist needs to understand
Every tax system needs clear rules. That’s why tax law is built on a set of legal sources and principles that ensure taxes are applied fairly and consistently.
What are the sources of tax law?
The sources of tax law are the legal rules that provide the basis for regulating taxation and defining how the tax system works. The main sources in Spain include:
- The Constitution.
- Tax laws passed by Parliament.
- Regulations that implement and develop those laws.
- International treaties and European legislation, where applicable.
These sources allow the tax system to operate according to a common set of rules. They also provide legal certainty, helping individuals and businesses understand which rules they need to follow and what they can expect from public authorities.
What are the principles of tax law?
Tax systems aren’t designed at random; they must comply with a set of strict ethical and fairness principles. In fact, these principles are so important that they are enshrined in Article 31 of the Spanish Constitution. Some of the most important are:
- Principle of legality: taxes can only be introduced or amended through legislation.
- Principle of equality: taxpayers in comparable situations should receive equivalent tax treatment. This doesn’t mean everyone pays the same amount, but rather that any differences must be justified.
- Principle of ability to pay: each taxpayer should contribute according to their financial resources.
- Principle of progressivity: those with greater economic means may contribute proportionally more.
- Principle of legal certainty: tax rules should be clear, stable, and predictable.
These principles help us understand that taxation isn’t simply about paying taxes. It’s also about protecting rights, preventing abuses, and ensuring the system operates fairly.
What kind of tax lawyer is in demand today?
The domestic tax specialist vs the international tax lawyer
For many years, much of the work carried out in tax law focused on applying the rules of a single country. That profile is still essential today: businesses, individuals, and public authorities need professionals with a thorough understanding of the national tax system.
Today, however, there is also growing demand for lawyers who can deal with more complex situations that cross borders. For example, a company selling in multiple countries, a multinational restructuring its operations, a digital nomad working around the world, or an institution that needs to interpret international tax rules.
In an increasingly globalised world, the international tax lawyer is becoming ever more relevant: someone who understands taxation from a broader perspective, connected to different legal, economic, and regulatory systems.
What top law firms and international organisations are looking for
Top law firms, consultancies, and international organisations aren’t only looking for lawyers with expertise in domestic and international tax rules. They’re looking for legal professionals who can interpret legislation, solve problems, and understand the context in which decisions are made. Some of the most important skills include:
- Analytical skills.
- Legal reasoning.
- An interest in business and economics.
- An international outlook.
- Language skills.
- The ability to communicate complex ideas clearly.
- The flexibility to adapt to changing environments.
This specialisation also demands curiosity and a commitment to lifelong learning. Tax rules evolve constantly in response to new business models, social change, international agreements, and technological advances.
How to study tax law: comparing your options
There isn’t just one route into a career in tax law. What’s important is building a strong legal foundation and then shaping your profile around the areas that interest you most.
The three pathways offered by Esade share one essential feature: they all include the accredited Bachelor in Law. That means all three provide a solid legal education, combined with a practical approach focused on developing professional skills. They also include additional training in areas such as transnational law, languages, and specialist tracks.
What changes across the double degrees is the complementary perspective that builds on that common foundation:
Bachelor in Law
The Bachelor in Law is a good option for students who want to focus on the legal field.
Throughout the degree, you’ll become familiar with different areas of law, including employment law, civil law, criminal law, administrative law, tax law, and more. You’ll learn how to analyse legal problems and develop skills in argumentation, interpretation, and critical thinking.
At Esade, the degree also includes additional business-focused subjects, such as economics, accounting, and finance, as well as a specialist track that allows you to tailor your studies to your interests.
Double Degree in Law and Business Administration
The Double Degree in Business Administration and Law combines the study of law with expert management education. This approach may be particularly suitable if you’re interested in how businesses operate and want to understand how decisions are made in the corporate world.
In tax law, this combination makes a great deal of sense. Many career paths are linked to advising companies, corporate taxation, business transactions, or consultancy. In these contexts, combining both disciplines is a real advantage: understanding how a company works makes you a lawyer with valuable additional expertise.
Double Degree in Law and Global Governance, Economics & Legal Order
The Double Degree in Law and Global Governance also builds on a comprehensive legal education, but adds a perspective focused on international relations, geopolitics, the global economy, and global governance.
In tax law, this perspective can be particularly valuable when dealing with tax issues that cross borders and require an international outlook. The activities of multinational companies, international mobility, digital taxation, and coordination between tax authorities are just a few examples.
To find out which pathway is the best fit for you, you can also take Esade’s degree orientation quiz.
Frequently asked questions
What international career opportunities does tax law offer?
Tax law can open up opportunities in law firms, consultancies, multinational companies, public bodies, and international organisations, particularly in areas such as corporate taxation, international transactions, regulatory compliance, and tax planning.
When does it make sense to choose a double degree instead of a Bachelor in Law?
A double degree may be the right option if, alongside a strong legal foundation, you want to develop expertise in another area from the start. Business Administration and Law is a good fit for students interested in business and consultancy, while Law and Global Governance suits those drawn to international relations and global challenges. A double degree also broadens your career options because it combines the opportunities that come with studying law with those linked to the second degree.
What’s the difference between tax law and fiscal law?
In practice, the two terms are often used almost interchangeably. However, tax law focuses specifically on taxes, fees, and compulsory contributions, while fiscal law is more commonly associated with their practical application, administration, and planning.
How does Esade prepare students for a career in tax law?
Esade provides a strong legal foundation that includes dedicated tax law courses, while also offering additional training in areas such as transnational law, business, languages, and specialist tracks. The learning experience is practical, and the different degree pathways allow you to shape your profile around the areas that interest you most.
Choose the legal pathway that’s right for you and start building your future in tax law: a field with opportunities both at home and internationally.
