Interpersonal aspects of a relationship (i.e., equality, trust, disclosure, etc.) as they relate to finances have important implications for marital satisfaction; however, emphasis on financial transparency, "the open and honest disclosure of one's finances," has yet to be researched. To increase our capacity to study the role of finances in the marital relationship, the purpose of this study was to develop the Financial Transparency Scale (FTS) to assess financial transparency between married partners. The FTS consists of three subscales: financial partnership, financial secrecy, and financial trust and disclosure of the individual partner. Implications for practitioners and researchers will be discussed.