Nationalization in Poland occurred on a large scale in the aftermath of World War II and introduction of the communist government in Poland. Various forms of nationalization in Poland were suggested by socialist parties and politicians during the era of the Second Polish Republic. Following the communist takeover of the country in the aftermath of World War II, the new communist government issued a number of decrees nationalizing significant parts of Polish property in the years 1944–1956.
Interwar Poland
Following the restoration of Polish independence in 1918, a number of primarily socialist parties and politicians issued promises of nationalization. As the politics and government of Poland stabilized, nationalization policy lost its support, and the March Constitution of 1921 contained property-protecting provisions that made nationalization difficult.
Communist-era nationalization
The idea of nationalization returned during World War II, as most of the Polish underground parties of the Polish Underground State declared support for nationalization of the occupants' property as well as that of variously defined 'traitors and collaborators'. As the Soviet armies advanced westward and entered former Polish territories, the provisional Polish communist government similarly promised confiscation of property stolen by the Germans, and its redistribution. Among the earliest nationalization laws passed by the Polish communist government was the Land Reform Decree of 6 September 1944, which nationalized all privately owned land of over 50 agricultural or otherwise over 100 hectares. Another law passed on 14 December 1944 concerned the nationalization of forests. All medium and large industries falling into the communist sphere of influence were immediately placed into a "temporary" state ownership, first without legal backing, but made legal by several decrees of 1945. A 1945 decree known as the Bierut Decree nationalized most of the properties in the Polish capital of Warsaw. A related, wider-ranging laws on all abandoned property stated that such property would become a property of the state or other social institutions after 10 years. A wide-ranging nationalization Law on the Nationalization of Industry was passed by the State National Council on 3 January 1946. It transferred to the state without compensation all formerly German property, as well as property of collaborators. It further declared that the state was taking over all companies in 17 branches of industry, and in all others, all medium and large companies. Compensation was provided to foreign owners only. Approximately 35,000 companies were nationalized by 1 October 1948. Certain other companies that were not under the scope of the 1946 law were nationalized in subsequent years, with the final batch nationalized by the Law of 25 February of 1956. Unlike in most other Eastern Bloc countries, only about a third of Polish agriculture became nationalized, and the rest remained in the private sector.
Reprivatisation (1989–current)
Following the fall of communism in Poland in 1989, some of the formerly nationalized property have been subject to reprivatisation and restored to previous owners, their heirs or other claimants. However as of late 2018, Poland still had no single, unified law regarding reprivatisation, and the process has been slow and based on a patchwork of several smaller, limited laws. In some cases this process have been proven to be highly contentious and controversial, opening the doors to fraud and corruption which exploited the loopholes in the imperfect laws regarding reprivatisation. Many of the controversies were focused on Warsaw, where the whole land was nationalised with the purpose of planned reconstruction of the city nearly completely destroyed during World War II. Reprivatisation of public spaces with subsequent repurposing and neglect created chaos and had led to considerable fraud. In 2017 the Polish government established a dedicated ; as of July 2018 the Commission has reversed over a dozen of the decisions, but some of its rulings have led to further controversies and several trials.
