Volunteering nowadays is a natural part of the social area. One of the type of volunteering is one-time volunteering, which has it's own specification. This bachelor describe the motivation of volunteers for one-time volunteering in social-service establishments and the details of the process of finding volunteers for one-time events. A qualitative analysis was used to achieve the goals. A survey was created to collect the data, and semi-controlled interviews were conducted to obtain the answers.