Objectives:
The purpose of the study is to analyze the status of Warsaw as the leading business capital of Europe. To research the conditions for business development in Warsaw, predict the consequences of migration processes from Ukraine to Poland against the background of the war.

Material and methods:
The article used such general scientific research methods as empirical and theoretical (analysis, synthesis, abstraction, generalization and induction). Systemic, functional, specifically sociological and comparative research methods were also used.

Results:
In the article, for the first time after the full-scale military invasion of the Russian Federation into Ukraine, it was possible to trace the processes of Ukrainian business migration to Poland and its capital and the impact of these processes on the economy and law.

Conclusions:
1. Poland is definitely the leader of the countries of Eastern and Central Europe in terms of business conditions. The war in Ukraine became a real challenge for Poland, which spent 1% of GDP to support the neighboring country. 2. Statistics show that Poland received the largest number of migrants from Ukraine and Belarus, and also experienced the relocation processes of Ukrainian businesses. 20% of Ukrainian IT companies moved their business or offices to Poland. Warsaw is turning into a powerful center for the development of IT technologies and startups. 3. In Poland, in particular in Warsaw, there are numerous governmental and nongovernmental support programs for the start-up and young companies relocating their business to Poland. 4. Most entrepreneurs in Poland felt the impact of such negative factors as a strict lockdown, frequent changes in legislation, especially regarding taxes, low level of digitalization, Inflation and rising property prices.