Despite the prevalence of peer-to-peer accommodation-sharing platforms, what incentivizes individual hosts to expand their listings on platforms such as Airbnb remains unknown. This study investigates the economic/financial, social, and community incentive of hosts to expand listings and the interplay among these incentives in driving the listing expansion. Using large-scale but granular field data collected from an emerging accommodation-sharing platform in Beijing, China, we found that economic/financial, social, and community incentives significantly affect listing expansion in accommodation-sharing services. In addition, while the economic/financial and social incentives jointly motivate hosts to expand, such effects are both mitigated as the hosts’ experiences of accommodation sharing increases. This study adds to the extant literature a unique but less studied perspective of host expansion and provides important implications on incentivizing and regulating hosts for a healthy and viable accommodation sharing community.