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JSB Tax

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About us

Who we are

We make sure everything is truly taken care of after the deal. We are a tax advisory firm affiliated with JSA Tax Consultancy, with a sharp focus on the fiscal challenges faced by portfolio companies of private equity firms. We are the partner for hands-on tax support.

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What we do

After Closing, the real work begins for us. We support companies in executing their “100-day plan” through a practical and results-driven approach. This includes:

  • Setting up the tax structure (VAT entrepreneurship, management agreements, VAT and corporate income tax fiscal unities);
  • Remediation of historical risks identified during due diligence;
  • Analysis of the tax treatment of transaction costs (acquisition and disposal);
  • Review of interest deductibility;
  • Alignment of employee insurance contribution obligations;
  • Ongoing tax compliance (VAT and corporate income tax returns);
  • Alignment of VAT and corporate income tax positions with the tax authorities;
  • Statistical sampling to substantiate VAT positions;
  • Alignment with the tax authorities on the treatment of SAR plans (Stock Appreciation Rights);
  • Rationalisation of the structure, including restructuring;
  • Other tax advisory services (VAT, corporate income tax and payroll tax), both domestic and international.

Our team

Marko Groen

Partner JSB

Marko holds a bachelor’s degree in tax law and economics from the Hanze University of Applied Sciences in Groningen. He worked at KPMG Meijburg & Co for about 10 years, after which he worked for a large multinational as tax manager. He has extensive experience in preparing (complex) corporate tax returns, tax day-to-day advice to companies and has a strong numerical insight.

Rudolf Wortelboer

Senior VAT manager

Rudolf studied tax law at the University of Groningen. After his studies, he worked as a VAT specialist at Baker McKenzie Amsterdam and Atlas Tax Lawyers. As a VAT specialist, he has extensive experience in day-to-day VAT advice, private equity deals, (supply chain) restructurings and fund structures. Within JSB, Rudolf advises, supports and unburdens portfolio companies with regard to VAT matters in the broadest sense, including the implementation of a 100-day plan or the setting up and implementation of VAT governance.

Guy Vaessen

Tax advisor

Guy holds a degree in Tax Law from Fontys University of Applied Sciences in Eindhoven and is currently pursuing a Master’s in Tax Economics at the University of Amsterdam. Prior to joining JSB, he spent six years at PwC, gaining broad experience in both the compliance and M&A teams. At JSB, Guy focuses on supporting companies with all post-deal tax matters.

How we work

Fast, practical and no-nonsense — we get it done.

What we can do for you

Our services

Post-closing follow up

100-day plan, Tax integration, transaction costs, CIT and VAT fiscal unity

Day-to-day tax advisory services & restructurings

CIT, VAT & Wage tax

Tax compliance

Corporate income tax and VAT returns

JSB Tax

Jozef Israëlskade 46
1072 SB Amsterdam
Netherlands
Route