Deals & cases
MDDP is one of the largest and most awarded tax advisory firms in the Polish market. We are responsible for handling the largest and most complex tax proceedings, including international cases, where we represent clients in numerous groundbreaking or industry-recognised proceedings before tax authorities, regional administrative courts, the Supreme Administrative Court, and the Court of Justice of the European Union. The MDDP team has extensive transactional experience. We have provided tax advisory services for dozens of transactions for key players and have been recognised multiple times for our work on prestigious transactions in the real estate and renewable energy sectors.
Breakthrough judgment obtained in the case of contributions on foreign income
Breakthrough judgment on contributions on foreign income case, invalidating health insurance contributions on income from foreign transparent companies.
Determining a Fixed Establishment in the Platform Economy Sector
Project on determining permanent establishment in the platform economy sector, ensuring correct tax compliance across the EU.
International Project on the VAT Treatment of Returnable Packaging
International project on VAT taxation of returnable packaging in the EU, addressing complexities related to intra-EU movements, registration, and tax compliance.
Important ruling in the case of the so-called tax carousel
Important ruling by the Supreme Administrative Court on the "tax carousel", confirming the need for tax authorities to prove the taxpayer's conscious involvement in fraud.
Strategic cost allocation and tax risk management for a global tech provider
MDDP supported a renewable energy client in constructing eight wind farms, ensuring compliant cost allocation, tax efficiency, and risk management.
Tax support for a foreign client in a tax compliance verification procedure
MDDP supported a renewable energy client in constructing eight wind farms, ensuring compliant cost allocation, tax efficiency, and risk management.
Investment cost calculation for wind farms
MDDP supported a renewable energy client in constructing eight wind farms, ensuring compliant cost allocation, tax efficiency, and risk management.
Comprehensive market price analysis for a leading financial institution
Input VAT and vPPA: Court confirms the right to fully deduct input VAT on CfD transactions and renewable energy certificates for e-commerce businesses.
Strategic transfer pricing analysis for a high-value corporate restructuring
Input VAT and vPPA: Court confirms the right to fully deduct input VAT on CfD transactions and renewable energy certificates for e-commerce businesses.
MDDP is awarded three ITR EMEA Tax Awards 2025
MDDP is awarded three ITR EMEA Tax Awards 2025
MDDP has won three prestigious awards at the ITR EMEA Tax Awards 2025:
Tax Litigation Lawyer of the Year – Jakub Warnieło, MDDP
Tax Disputes Advisory Firm of the Year – MDDP
Impact Case of the Year: Landmark ruling on...
vPPA and a right to deduct input VAT
Input VAT and vPPA: Court confirms the right to fully deduct input VAT on CfD transactions and renewable energy certificates for e-commerce businesses.
Effective support in a customs and tax audit of an International shipbuilding company
MDDP experts supported the shipbuilding company during a customs and tax audit, successfully defending its CIT settlements and avoiding an additional liability of PLN 2.5 million.