About us

Tax advice with a personal approach

The best tax advice emerges when expertise, practical solutions and personal involvement come together.

Meet FourTax

Navigating tax complexity

The tax landscape is becoming increasingly international and complex. FourTax turns complex tax matters into clear choices and practical solutions.

As a boutique firm, our experienced partners work closely with clients. You have a dedicated contact who knows your organisation and objectives. Direct communication and personal involvement are the key to our approach.

The scale of our firm keeps us accessible and enables us to move quickly. This allows us to combine the technical depth of a large advisory firm with the personal approach of a dedicated team.

We support clients from analysis through to implementation. We work hands-on, take responsibility and remain involved, ensuring our advice is both legally sound and practical to implement.

Our team

Meet the FourTax partners.

Maarten van den Beucken

Senior Partner

With over 17 years of experience, I advise multinational groups, private equity firms, high-net-worth individuals and expatriates on domestic and international tax matters. My broad and varied practice have allowed me to develop as a deep generalist, combining expertise across the tax spectrum with specialist knowledge of international taxation.

Focus

International taxation
Corporate income taxation
Litigation

maarten@fourtax.nl +31 6 27 55 38 48 LinkedIn

Martijn Verdonk

Senior Partner

With more than 20 years of experience as a tax adviser, I act as a strategic partner to businesses facing complex tax matters. My extensive expertise enables me to quickly identify tax opportunities and key considerations within a business and translate them into a clear course of action.

Focus

Restructurings
Corporate income taxation
Lucrative interest

martijn@fourtax.nl +31 6 41 39 56 78 LinkedIn

Ilyas Benmouna

Partner

With a background in tax economics, I advise businesses on transfer pricing, international taxation and corporate income taxation. I look beyond the legal analysis to understand the economic impact on the business and translate it into clear, practical solutions.

Focus

Transfer pricing
International taxation
Innovationbox

ilyas@fourtax.nl +31 6 18 69 72 24 LinkedIn

Cas Coelen

Partner

I advise domestic and internationally operating businesses on a wide range of tax matters. I believe it is important to make complex issues clear and practical, and to work with clients to find solutions that fit their business and specific circumstances.

Focus

Corporate income tax
Dividend withholding tax
Management participation

cas@fourtax.nl +31 6 54 97 37 67 LinkedIn

Questions about your tax position?

Sometimes one conversation is enough. A brief informal discussion often clarifies whether tax risks require attention and which next steps make sense.

Book a consultation