Municipal disclosure has undergone major changes during the last two decades. New legislation and updated recommendations have contributed to a more comprehensive annual report, but also questions what is mandatory information or not. Research has found that mandatory information is not sufficient or relevant to stakeholders of public accounting. Public organizations are therefore forced to disclose more information to satisfy stakeholders. Previous studies have investigated why and how voluntary information is produced, but have had a broad perspective, lost relevance, or not studied Swedish municipalities. The purpose of this study is therefore to contribute knowledge about what affects the producer of municipal accounting in the reporting of voluntary information in the annual report. Furthermore, it is to understand what purpose the producer has with voluntary information. The empirical data was collected using a qualitative method. The sample is a combination of subjective and convenience sampling, involving people with local connections and experience of the phenomenon. Therefore, six finance managers and two accounting managers in seven different municipalities in Region Värmland have been in-depth interviewed. Because of the Covid-19 pandemic, the interviews were conducted by telephone. After the empiric has been reduced to quotes and codes, it is analyzed with the legitimacy theory, positive accounting theory, institutional theory, stakeholder theory, and previous research in voluntary information and municipal accounting. The conclusions are that the purpose of the voluntary information is to increase stakeholders' understanding, get more people to read the annual report, and to show a better picture of the municipality. The producer of municipal accounting is influenced by other municipalities' working methods and annual reports when voluntary information is produced. Furthermore, political parties in the municipality, recommendations issued by the Council for Municipal Accounting (RKR), and the municipality's financial position have an impact on the voluntary information that is presented. The results of the study are of interest to the producers of municipal accounting and RKR for more transparent reporting. The study can be supplemented by a survey of which information municipal stakeholders are demanding.