<p>Individuals with obsessive-compulsive disorder (OCD) often struggle to find willingness to engage in treatment; social support presents as a means of increasing willingness. We investigated the relationship between social support and readiness to change (RTC) in individuals with OCD. A sample of 104 adults with OCD completed measures assessing RTC, social support, depression, OCD symptoms, and internalized stigma. Guided by a directed acyclic graph, we first constructed a main effects multiple linear regression model to identify significant predictors of RTC. We then built models to test for moderation and mediation to determine if internalized stigma explained the relationship between symptom subtype and RTC. Age (<i>β</i> = 0.21), depression severity (<i>β</i> = 0.21), and the unacceptable thoughts symptom factor (<i>β</i> = 0.89) predicted RTC. There was a significant main effect of social support on RTC (<i>β</i> = 0.58), with symptom subtype moderating this relationship. Both unacceptable thoughts (<i>β</i> = − 0.65) and harm obsessions (<i>β</i> = − 0.67) showed a strong negative interaction with social support. While social support is positively associated with RTC in OCD, this relationship varies in the presence of unacceptable thoughts and harm obsessions. These findings suggest that non-professional social support may be a means to bolster RTC through the careful consideration of patient-level factors.</p>