CL "Podkrepa" has over 150,000 members, united in 36 regional trade unions, 30 federations and national unions and 4 associated organizations. As early as the summer of 1989, the confederation beagan to establish solidarity relations with trade union headquarters abroad. Podkrepa has particularly friendly relations with the Polish Trade Union “Solidarity”. Contacts were established, which grew into close cooperation with Force Ouvrière and CFDT /France/, AFT-CPP /USA/, trade union headquarters from Spain, Italy, Switzerland, Germany, Hungary, Romania.
The Confederation of Labour “Podkrepa” was the first trade union organization in Bulgaria to join the International Confederation of Free Trade Unions (now the International Trade Union Confederation) in June 1991. The Honorary President of the Confederation Dr. Konstantin Trenchev was Vice President of the International Confederation of Free Trade Unions in 1992-1996 .
The Confederation of Labour “Podkrepa” has had an observer status in the European Trade Union Confederation since January 1994, and since December 1995 it has been accepted as a full member of the large European trade union family.
At the 10th Regular Congress of the ETUC in Prague in 2003, for the first time since the establishment of the ETUC, a Bulgarian - namely Dr. Konstantin Trenchev was elected Vice President and Member of the Board of Directors of the ETUC.
At the 13th Congress in Paris in 2015, the conferderation president Dimitar Manolov was elected Vice President of the ETUC for the period 2015-2017.
In 2010, Podkrepa was accepted as a full member of EZA - the largest Christian training center.