Resumo: This paper analyses the use of Hoss (2003) model of valuation of intangible assets in the Third Sector, introducing solutions that may reduce the distortions created by conventional accounting principles. This is an exploratory, descriptive and explanatory research, based on income statements, balance sheets and research of quantitative and qualitative variables focused on past-future and present-future human, structural, processes and ambiental aspects. A qualitative case study was developed aiming to evaluate the volunteers work contribution in value creation for the sustainability of an organization and measured by its intangible assets. Those assets correspond to 94,05% of the organization value and only 5,95% of that are tangible in the period 2007 - 2011. In the period 2012 - 2013 the intangible reached 88,68% and tangible assets value reached 11,32%. Volunteer work contributed an average of 77,53% of the organizations value. The significant correlation between the variables Lucro Intangível Ajustado (LIA) and Apuração do Valor Intangível (AVI) explains the value added with the use of intangible assets and volunteers work.
