 This study aimed to determine the economic burden and affecting factors in adult community acquired pneumonia, CAP, patients by evaluating data from two centers in Istanbul province, Turkey. The total mean cost was €556.09 for inpatients and €51.16 for outpatients, elders, individuals with comorbidities, and those hospitalized more than once had higher costs. Rational decisions about hospitalization and antibiotic use according to guidelines can decrease costs. Vaccination may prevent the disease and contribute to the economy in risk groups. This article was authored by Filiz Koza, Devrim Emal Alisi, Basik Hasidadal, and others.