The objective of this study is an investigation of tax regulations for nonprofit associations (NPAs) in EU countries, Japan, and the United States. Following a brief description of qualification principles for NPAs, treatment of business units, or liability issues, a particular focus is put on a comparison of regulations concerning the taxation of current profits, inheritance, and gift taxes and the tax treatment of contributions and membership fees. In general, a strong similarity among the examined developed countries can be found for the different aspects considered, but significant differences also exist.