The history of cooperative banking in Poland goes back to the late 1850s, and has mirrored the changing fortunes of the territories that now form Poland. Its origins go back to the third quarter of the 19th century in the Polish territories that were then respectively ruled by the Habsburg monarchy, Prussia and the German Empire, and the Russian Empire. Cooperative banks then largely coalesced into a single national system in the interwar period, but suffered heavily during World War II and the early period of the subsequent Communist regime. Nevertheless, the sector displayed long-term resilience and adapted to the conditions of the post-Communist transition. As of the mid-2020s it is dominated by two nationwide cooperative banking networks, the BPS Group and SGB Group.
In partitioned Poland, cooperative banks on parallel paths in the three components of what would later become Polish territory, building up - like elsewhere in Europe - on the mid-19th-century German experiments of Hermann Schulze-Delitzsch and Friedrich Wilhelm Raiffeisen.
By mid-1914, 5,029 cooperative banks existed in all of partitioned Poland, serving over two million members.
Following the turmoil of World War I and its hyperinflationary immediate aftermath, the BZSZ came under the ownership of private individuals even as it kept providing services to local cooperative banks. Remaining in Poznaà Â, it relocated in 1920 into the head office building that had been erected for itself in 1910âÂÂ1911 by the Ostbank für Handel und Gewerbe, a German-owned bank that was expropriated following the postwar regime change. In 1919, the CKSR absorbed the () and relocated from Lviv to Warsaw, while its ownership changed to include both the newly formed Polish state (succeeding the Galician ) and the affiliated local cooperative banks.
New legislation (Cooperative Law) enacted in 1920 provided a unified framework for the cooperative banks from the various prior partitions. Three nationwide associations of cooperatives emerged: the (ZZSR, ), established by Stefczyk in 1924, served by the CKSR as a central financing entity; the (UZS, ), successor of the pre-war ZSZiG, served by the BZSZ; and the (ZSS, ), formed by the Spoà Âem cooperative movement in 1925 and served by the . Following Stefczyk's death in 1929, the Raiffeisen-style banks he had promoted, known until then as (SOP, ) became referred to as ("Stefczyk cooperative banks"). In 1934, the UZS and ZZSR were merged into the (ZSRiZG, ).
During the Occupation of Poland (1939âÂÂ1945), many cooperative organizations were expropriated, liquidated or went underground in both the German and Soviet occupation zones. In the General Government, the ZSRiZG was downgraded to an auditing body (). A German-operated banking supervisor () tightly controlled the operations of the surviving cooperative banks, whose number dwindled to 1,152 by 1943 and 952 by 1945.
Shortly after liberation from German occupation, by decision of the CKSR and were merged into (BGS, ), which when operational in 1946 became the sole central entity for all of Poland's local cooperative banks. A Council of Ministers' decision of led to the liquidation of the country's leading private commercial banks, but (with the exception of the BTS in Warsaw) the cooperative banking sector was temporarily spared. By 1948, Poland had 1,485 local cooperative banks in its new borders, serving 447,000 members. The communist authorities, however, distrusted the cooperative movement which remained largely associated with an independent civil society and the Catholic Church.
In 1948âÂÂ1951, the government expropriated the entire financial sector into a single-tier banking system. In late 1949, 1,256 local cooperatives were transferred to the control of municipal authorities and reorganized as Municipal Cooperative Funds (, GKS). The state reorganized the Powszechna Kasa OszczÃÂdnoà Âci (PKO, ) as a monopoly institution for retail deposits, which GKSs subsequently collected as agents of PKO. The state-owned (), formed from the 1949 liquidation of the former (PBR, , itself a 1921 reorganization of the originally established in Warsaw in 1919), absorbed the BGS and assumed a central organizational, auditing, and financial role over the GKSs. The (), another specialized state-owned bank, absorbed the operations of the BZSZ, which in 1949 had relocated from Poznaà  to Warsaw.
The centralizing reforms, however, were soon partly reversed. In 1953, the National Bank of Poland took over the central services role to GKSs from the Bank Rolny. Following the Polish October political changes in 1956, some autonomy was restored to the 1,285 local cooperative banks, albeit still under tight central state control; from 1957 they were again referred to as or SOPs. in 1964, the SOPs re-established a national entity of their own, the Central Union of SOPs ().
On , the central state control over the sector was again tightened. Bank Gospodarki à »ywnoà Âciowej (BGZ) was created from the merger of the Central Union of SOPs with the still state-owned Bank Rolny, while the SOPs were rebranded as cooperative banks (). At its inception, BGZ was jointly owned by 1,663 local cooperative banks, together holding 46 percent of its equity capital, and by the State Treasury which held 54 percent. Initially, BGZ had a hands-on mandate and made or approved strategic banking decisions for the local cooperative banks. In 1982, in yet another swing of the political pendulum, new legislation gave back limited autonomy to Poland's cooperative banks, which were to deposit their excess funds at BGZ Bank.
By late 1989, there were 1,663 cooperative banks in Poland; their number would then gradually decline due to individual failures and ongoing consolidation. In the wake of the Balcerowicz Plan or "shock therapy", the Cooperative Act of deprived BGZ of its statutory role as their auditing organization and allowed individual local cooperative banks to associate themselves on a voluntary basis with a central financial entity known as "affiliating bank" (). Following the reform, BGZ was soon competing for that role with newly created affiliating banks such as (GBW, est. 1990 in Poznaà Â), (BUG, est. 1991 in Warsaw), and (GBPZ, est. 1992 in Wrocà Âaw). In March 1991, the () was established as the sector's new representative body. In 1992, of Poland's 1,651 local cooperative banks, the vast majority (1,268, or 77 percent) were still affiliated with BGZ, 11 percent (187) with GBPZ, 7 percent (114) with GBW, and 5 percent (82) with BUG.
In 1994, in a context of financial stress in the cooperative banking sector, BGZ was converted into a joint-stock company, with the state retaining 66 percent of its equity and the local cooperative banks owning the remaining 34 percent. That same year, BGZ Bank's brokerage arm was the first brokerage authorized by the Polish Securities Commission. In 1997, BGZ Bank opened a representative office in Moscow.
In the late 1990s and early 2000s, BGZ was gradually marginalized as an affiliating organization of local cooperative banks as the latter increasingly opted for alternative groups formed first through loose alliances of competing affiliating banks, then by mergers. By end-1996, the number of local cooperative banks affiliated with BGZ had decreased to 518, followed by 199 with (LBR, est. 1995 in Lublin), 173 with GBPZ, 153 with GBW, 137 with (WMBR, est. 1995 in Olsztyn), 111 with (PKBR, in Bydgoszcz), and 102 with BUG. A "G-2" group was then formed by Poznaà Â-based GBW with (BBR) in Koszalin, while Wrocà Âaw-based GBPZ led a rival "G-6" group formed together with BUG, LBR, WMBR, (MBR, in Kraków), and (RBR, in Rzeszów). GBW subsequently absorbed its G-2 partner BBR in 2001, then PKBR in 2002. On , GBPZ absorbed its G-6 partners to form Bank Polskiej Spóà Âdzielczoà Âci, or Bank BPS, by then the affiliating bank of a group that brought together 369 (61 percent) of Poland's 604 local cooperative banks.
By November 2004, the Polish state still owned 69 percent of BGZ Bank, the rest being held by cooperative and affiliating banks. On , Rabobank acquired a 13.8 percent stake, while the European Bank for Reconstruction and Development acquired a 15 percent stake. On , Rabobank raised its stake to 35.3 percent by buying out the other cooperative banks, and also acquired the EBRD's stake in 2008.
In 2011, GBW absorbed (MBR, est. 1996 in Warsaw) and rebranded itself as Spóà Âdzielcza Grupa Bankowa, or SGB Bank. Since then, the cooperative banking sector in Poland has been dominated by the two rival networks, BPS Group and SGB Group. Those local banks that have chosen to join neither have been decreasing in number; by mid-2025 they were Bank Spóà Âdzielczy w Brodnicy in Brodnica, in Bydgoszcz, in Cheà Âm, and in Kraków, in Olsztyn, and in Suwaà Âki. The total number of local cooperative banks kept gradually decreasing from 576 in 2010 to 561 in 2015, 530 in 2020, and 489 in 2024. In addition, the or Polish credit unions formed a separate group of mostly very small local entities.