X-ON-X
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X-ON-X has a focus on business launches and the scaling of operations, with its tax offering playing a key role for Ukrainian companies expanding abroad, as well as international clients seeking advice on the fluid Ukrainian tax law matrix. Oleg Kotliar leads the practice group and has strong professional and legal experience in the finance sector. Viktoriia Kotliar is the other key contact, and has experience assisting companies and HNWIs.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- Standout advisor. Oleg Kotliar has set a new competitive benchmark in the market, giving a level of strategic insights and involvement that surpasses many rivals.
- One of the few consultants I worked with who is able to connect the dots and come up with a solution that fits the market context and broader business objectives. I recommend the X-ON-X team for bespoke tax solutions that are practical and always forward-looking.
Key clients
- Bettter Us
- Bazhane
Work highlights
Advised Ukrainian upcycling clothing system Bettter on expanding its reach and entering the European and US markets and establishing international partnerships and collaborations.


