De coalitie houdt woensdag en donderdag topoverleg over de koopkrachtdaling van 6,8%. Het kabinet wil deze ongekende koopkrachtval compenseren, maar hoe kan dat effectief en enigszins betaalbaar?

The response of international organizations to the problems of cross-border death and gift taxation needs to be revisited, according to PhD candidate Vassilis Dafnomilis. PhD defence on 3 June 2021.

On 15 February 2022, Irma Mosquera Valderrama, Professor of Tax Governance, holder of the EU Jean Monnet Chair on EU Tax Governance EUTAXGOV and Principal Investigator of the ERC funded project GLOBTAXGOV, participated in the High-Level Webinar Taxation and Business in Africa.

By making use of artificial tax arrangements via the Netherlands and other countries, corporations and wealthy individuals worldwide together manage to avoid paying $472 billion in tax.

Martijn Nouwen is an Assistant Professor in Tax Law and coordinator of the research project Tax Transparency of the Tax Law Department. His research and teaching focuses on international and European tax law. He has a particular interest in the topic of harmful tax competition between countries, which…

Laurens van Apeldoorn is an assistant professor of tax law at Leiden University.

On 10 March 2023, the Amsterdam Centre for Tax Law (ACTL) of the University of Amsterdam (UvA) organised the Conference ‘Towards eXplainable Artificial Intelligence (XAI) in Taxation: The Future of Good Tax Governanceon’.

Egbert Jongen is Professor of Economics and socioeconomic policy.

In her teaching and research, Mosquera primarily seeks the connection between tax law and other disciplines. Her appointment is effective as of 1 November 2021.

How do, or don’t, multinationals pay their taxes? Learn all about this in the new online course given by Leiden University’s Department of Tax Law: 'Taxation of Multinationals for Everyone'. This free course builds on the success of the award-winning 'Rethinking International Tax Law' course.

The Pandora Papers turned the spotlight on Wopke Hoekstra’s investment in an African safari company via a tax haven. Apparently, there was no tax evasion, but that does not seem to be the whole story. Martijn Nouwen, assistant professor in tax law, explains in Follow the Money how the safari enterprise…

Each scientific institute has its own dynamics. The Executive Board is visiting the different institutes to find out what is going on there. On 11 March, staff at the Institute of Tax Law and Economics talked to the Board about their teaching and research. What is going well and what are the challen…

Last November, it was announced that the European Commission has awarded a Jean Monnet Chair to Professor of Tax Law Irma Mosquera Valderrama. She will use the grant to shape the EUTAXGOV project over the next three years.

Maarten van 't Riet is senior researcher at CPB Netherlands Bureau for Economic Policy Analysis and External Phd Candidate at Leiden University, department of Economics and department of Tax Law.

Edmund Hayes gained his doctorate with honors from the department of Near Eastern Languages and Civilizations at the University of Chicago. He works on early Islamic history, in particular Shiʿi history, focusing on the intersection of intellectual developments and social and political dynamics. He…

The majority of professors of tax law in the Netherlands have links to accounting and law firms, writes Dutch newspaper De Volkskrant.

Too often, tax scholars have a dual role: advising the government on legislation, while at the same time helping companies to pay as little tax as possible. This needs to change according to Bart Snels, a member of parliament for Dutch GreenLeft party.

Dutch newspaper Trouw investigated the tax position of multinational Cargill. Their conclusion? Cargill appears not to pay taxes over their profits. Trouw asked Jan van de Streek, Professor of Tax Law, and PhD candidate Josephine van der Have for an explanation. Prior to this, Van der Have had also…

When moving to the Netherlands, it is important to know whether you are considered resident tax payer or non-resident. Both residents and non-residents are taxed on their taxable income. A number of criteria help determine your status as resident or non-resident.

Lecture

Tirza Cramwinckel, Assistant Professor in tax law, has won one of the 2023 Research Prizes awarded by the Praemium Erasmianum Foundation.

Nu belastingsystemen over grenzen gaan, speelt de politiek een steeds grotere rol. Irma Mosquera Valderrama pleit voor een wereldwijd, inclusief systeem.

He officially began as Strategic Adviser for Real Estate on 1 July. But in practice, Ferdy Poppelier, the former Director of Real Estate, will still mainly be the principal of construction projects. ‘It’s great to see that we as the Real Estate expertise centre have achieved so much.’

On Monday 10 October a debate was held at the KOG, ‘Tax in the Boardroom’. During this inspiring event, students and tax experts from the business sector and public bodies considered the tax issues that are dominating the public debate. The tax experts were Joost Kutsch Lojenga (Shell), Sebastiaan de…

Na Shell en Unilever is DSM het derde grote bedrijf dat vertrekt uit Nederland. Fiscalisten zijn niet verbaasd: het sentiment over het vestigingsklimaat hier is momenteel minder gunstig.

Tax scandals, like the Panama Papers, the Paradise Papers, and the Pandora Papers, have made tax avoidance by large multinationals and rich individuals a major topic of public debate. Policymakers are pushed to close tax loopholes and reform the global tax system. But this is no easy task.

The benefits department of the Dutch Tax Administration has attempted to reach backroom agreements with the judiciary about the decision period in benefits cases. Lecturer in tax law Martijn Nouwen says this harms the legal protection of victims.

Rewarding good behaviour, instead of punishing it – a proven pedagogical method. Would it also work in tackling tax avoidance? This question sparked the interest of PhD candidate Josephine van der Have. Her research investigates the potential of a trademark for fair taxation.

In the late 19th century, the Dutch government introduced a tax system in the Dutch East Indies, with the intention of transforming the colony into a modern state. PhD student Maarten Manse wrote his thesis on this development and discovered how grandiloquent colonial ideals became bogged down in daily…

On the occasion of Euroscience Open Forum 2022, Professor Attiya Waris (Director of Research and Enterprise and Professor of Fiscal Law and Policy in Eastern Africa, University of Nairobi, Kenya), Professor Irma Mosquera Valderrama (Professor of Global Tax Governance, Lead Researcher GLOBTAXGOV ERC…

Many national and international research funders can provide financing for your research project.

Mees Vergouwen heeft op 28 oktober de Mitchell B. Carroll prijs van de International Fiscal Association (IFA) ontvangen. De fiscalist won de prijs met zijn proefschrift over ‘botsende belastingregels’.

At the end of June 2021, The Dutch Ministry of Finance made a policy document public that dates back to 2016. In it, civil servants acknowledge that the Netherlands risked providing unauthorized State aid to American multinationals by allowing them to use a controversial, but favourable, fiscal construction:…

Under #TheCode European media report about Martijn Nouwens’s research on the secretive EU Code of Conduct Group which is tasked with tackling harmful tax competition in Europe. The stories expose to the wider public for the first time how this diplomatic high-level working group of EU Member States…

The Inter-American Center of Tax Administrations CIAT and the GLOBTAXGOV project have published the 'Toolkit for the Design and Effective Implementation of Domestic and International General Anti-Avoidance Rules'.

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

A delegation from the University of Edinburgh recently visited Leiden University to deepen their collaboration. What makes Edinburgh such an attractive partner?

If you work, you are eligible for tax reduction in the form of tax deductions. You can apply for or terminate a payroll tax deduction via BAS InSite.

Title research: Data perspectives on the International Tax System.

Starting from June 1st 2025, Rex Arendsen is a guest researcher at the Tax Law department. From 2015 till 2025 he was a Leiden University Professor by Special Appointment (Endowed Professor) on Social and Historical Context of Tax Law. This chair has been formed by the private founding ‘Belastingmuseum…