In this paper, the author deals with detailed analysis of the legal regulation of two contracts of obligatory law, lifelong support contract and contract for support until death. Lifelong support contracts and contracts for support until death are regulated by the Civil Obligations Act in articles 579 to 589. The paper presents the historical development of the lifelong support contracts and contracts for support until death through three historical periods, from its regulation by the Inheritance Law, to its proper placement in the the Civil Obligations Act. The contract for support until death was first time legally regulated by Civil Obligations Act in 2006. In the paper are processed definitions of lifelong support contracts and contracts for support until death, their characteristics, contracting parties, the subject of the contract, the prescribed forms for their conclusion and the possibillities of protection of the contracting parties. These features are supported by cases from the practice of the courts of the Republic of Croatia, also there are presented disputed legal issues in case-law. The contracting parties are the recipient of support and the provider of support. The rights and obligations and the subject of the contract are regulated by the parties themselves. The content of these contracts is similar, and their main difference is the moment of acquisition of the property. The provisions applicable to the lifelong support contract shall apply to the contract for support until death in the appropriate part. Contracts may be terminated by mutual agreement and unilaterally due to the unbearability of living together or the non-fulfillment of an obligation by one of the parties. Additionally termination may be possible due to changed circumstances or death of the support provider. At the very end of the paper, it is described what tax benefits these contracts provide.