The bloc's executive proposed that member states chip in more to the shared coffers to provide 50 billion euros to Ukraine and spend another 15 billion on migration.
Budgetary decisions require unanimity and divisions were on display on Thursday as the bloc's 27 national leaders arrived for a summit in Brussels.
On the bloc's eastern flank, Estonian Prime Minister Kaja Kallas said that - beyond supporting Ukraine - joint spending should grow for improving EU defence capabilities.
Lithuania said 50 billion euros for Ukraine was not enough.
Orban's comments come as his government is trying to unlock billions in aid envisaged for Hungary in the EU budget but blocked by the European Commission over rule of law concerns.
Persons:
Gabriela Baczynska, Jan Strupczewski BRUSSELS, Alexander de Croo, Kaja Kallas, Kyriakos, Hungary's Viktor Orban, Orban, that's, Ireland's Leo Varadkar, Olaf Scholz, Marine Strauss, Krisztina, Tassilo Hummel, Rene Maltezou, Jan Strupczewski, Tomasz Janowski
Organizations:
European Union, EU, Belgian, European Commission, Diplomats
Locations:
Ukraine, Russia, Brussels, Estonian, Lithuania, Greece, East, Africa, Budapest, Hungary, Austria, Western Balkans, Germany