The contractual liability has been studied on the basis of unilateral and bilateral contracts, however, with the appearance of business collaboration agreements as an intermediate legal and economic phenomenon, new questions arise in regards of the applicable liability regime. The business collaboration agreement, as a horizontal corporate integration phenomenon in which the parts decide to share risks and profits, have a special contractual liability regime that differentiates them from the general regime applicable to synallagmatic contracts, because they are structured on the basis of a common interest of the associates.