KF was founded on 21 January 1973 in Århus, by the "Leninist Fraction" (a name given to them by their opponents) inside the Left Socialists (VS).
One section, centered in the university environment in Aarhus, emerged as a group called the "Coffee Club" (Kaffeklubben).
[1] In 1977, about 6% of delegates, based in Copenhagen, formed the splinter group Kommunistisk Forbund - politik (KF-p).
After departing from KF, KF-p attempted to join VS, but were denied entry on grounds of political disagreements.
[1] In 1980 the party was dissolved and its members rejoined VS. During its existence, KF held seven congresses and various annual summer camps.