Contemporary challenges—global crises, the digitalisation of the economy, and growing demands for sustainability and transparency—require new tools for analysing corporate reporting. This paper presents a framework for assessing companies’ integrated reports based on the concept of six capitals (financial, manufactured, intellectual, human, social, and natural) proposed by the International Integrated Reporting Council. The methodology is based on the application of specific indicators for each type of capital (environmental costs, customer satisfaction index, return on invested capital, etc.), their normalisation, and combination into an integrated index of capital value change. An important feature is the ability to model external and internal impacts—political crises, disasters, military actions, or emergencies that significantly affect the company’s stability. This approach allows us to clearly show how changes in each capital component affect the total value of the company and its sustainability.