Characterised by the three pillars of standalone tax advice, tax litigation, and tax law support for corporate matters, the practice at Ilyashev & Partners is often instructed on cross-border tax matters involving CEE countries. The industrial, agricultural, and technology sectors are all well represented in the team’s client base, and advice to NGOs is a particular strength. Practice head Ivan Maryniuk is an expert in providing tax planning for foreign investment projects in Ukraine. Among the group regularly involved in tax matters are experienced litigator Roman Marchenko; international trade and customs advisor Olena Omelchenko; and Dmytro Lazebnyi, who focuses on tax litigation at the firm’s Kharkiv office.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘Ivan Maryniuk combines technical mastery of tax law with the skills to translate highly complex formulas and legal ambiguities into clear, convincing arguments. For us, Ivan is not just a tax advisor – he is a true defender of the company’s reputation.’
- ‘While many law firms can argue procedure, Ilyashev & Partners went further: they dismantled the prosecution’s case point by point, showing that the alleged violations were based on misinterpretation of the tax rules rather than on our company’s conduct. Their proactive engagement with regulators helped to prevent escalation.’
- ‘Roman Marchenko has an extraordinary talent for leading the most complex disputes. In tax matters, where the stakes are always high, he is able to turn risks into a clear defence strategy. His confidence and creativity make him an indispensable player on the team.'
- ‘Ilyashev & Partners’ tax practice gives me absolute confidence that our business is protected at every level. They combine deep knowledge of Ukrainian tax law with a real understanding of how businesses work. For me, that is essential – advice that is not only legally correct but also practical and effective.’
- 'Ivan Maryniuk is young but already a very skilled tax lawyer. He explains complicated tax rules in a clear way and always finds practical solutions. Thanks to the firm's work, our company was able to protect itself from unfair tax claims. We are very grateful for their professionalism and dedication.’
- ‘Roman Marchenko is a very strong lawyer in tax litigation. He has great experience, knows how to deal with courts and authorities, and gives us confidence in every case.'
Key clients
- Volynholding
- COFCO Agri Ukraine
- CLAAS Ukraine
- CENTRAVIS
- Ukrspecexport
- AVSI Foundation
- GrainCorp
- Sempal
- Ferrexpo AG
- Ukrrichflot
- FSC Morye
- The Estonian Centre for International Development
Work highlights
Represented Module-Ukraine in Ukraine’s first anti-circumvention investigation concerning a fraudulent transshipment of Chinese steel through Malaysia to evade anti-dumping duties.
Advised the Estonian Centre for International Development on tax structuring and VAT treatment for a cross-border humanitarian investment project.
Advised an EU company on international tax frameworks for market entry into Ukraine’s electricity sector.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Ivan Maryniuk
Other key lawyers
Roman Marchenko; Olena Omelchenko; Dmytro Lazebnyi