Obsessive-compulsive disorder (OCD) is a heterogeneous disorder with symptom presentation that includes contamination, harm, unacceptable thoughts, and symmetry. Currently, there is a paucity of research examining the factors that account for distress in each of the subtypes. Maladaptive belief domains, beliefs about emotions, and religiosity have all been correlated with OCD severity; however it is unclear whether these factors equally contribute to severity in each of the symptom clusters. In the present study, 37 individuals receiving treatment for OCD were recruited from residential and intensive outpatient facilities and private practitioners specializing in OCD treatment. Participants answered questions related to their OCD symptoms, obsessional beliefs, beliefs about emotions, and religiosity. Severity from each of the subtypes was predicted by a different model, supporting the heterogeneity of OCD. While thought appraisal is often implicated in OCD symptomology, these results indicate that beliefs about emotions have a significant impact on symptom severity in the harm, unacceptable thoughts, and symmetry subtypes.