The current populational aging context requires that society reflect on the variables related with well-being and discuss ways of how to ensure them. The Conservation of Resources Theory (Hobfoll, 1989, 2002) posits that individuals who possess more material or social resources are more capable of resolving conflicts and dealing with stressful situations, thus maintaining good levels of well-being. However, there is a lack of instruments aimed at measuring the necessary resources for retirement well-being. The objective of this study was to translate and analyse the psychometric qualities of the Retirement Resources Inventory (RRI) (Leung & Earl, 2012) as applied to 1002 Brazilian retirees. Exploratory and confirmatory factor analysis were undertaken using two independent subsamples consisting of 401 and 601 retirees respectively. Two viable models arose from the exploratory analysis: A five-factor model, χ2(gl) = 816.644 (271); CFI = 0.88; GFI = 0.98; RMSEA = 0.07; R2 = 0.55; and a six-factor model, χ2(gl) = 1028.291 (400); CFI = 0.88; GFI = 0.98; RMSEA = 0.03; R2= 0.53, with good fit indices, but similar to each other. Confirmatory analysis pointed towards an instrument consisting of 29 items and five factors with good fit indices, χ2(gl) = 1,274(364); CFI = 0.87; TLI: 0.86; RMSEA: 0.06, corroborating the model proposed by Wang and Shultz (2010). The analyses also highlighted the need for actions that take into account the gender, age and region of the country where the retiree lives. Future cross-cultural studies are recommended seeing that retirement planning is an emerging issue that affects the world as a whole.