The pay-what-you-want pricing scheme has been frequently employed by nonprofit and for-profit tourism organizations. While this voluntary payment format can foster inclusivity by making tourism accessible to a larger population, one urgent challenge these institutions face is how to increase consumer payment to sustain both social and economic sustainability. The present work proposes a novel solution, that is, leveraging consumers’ actual or vicarious experience of physical cleanliness. Through two questionnaires and three experiments, this work demonstrates that physical cleanliness significantly boosts payment magnitude under pay-what-you-want. Importantly, this research identifies consumers’ regulatory focus as a vital boundary condition. Specifically, the positive cleanliness effect occurs among promotion-focused people but disappears among prevention-focused individuals. Besides, this study reveals that moral self-regard is the underlying mechanism driving the positive cleanliness effect. Theoretically, the current study presents a new perspective to understanding determinants of tourists’ voluntary payment decisions by investigating their embodied experience of physical cleanliness. It adds new insights to the sustainable tourism literature by addressing both social and economic sustainability through increased payments under pay-what-you-want pricing. Practically, the research findings provide destination managers and tourism providers with valuable guidance on how to boost people’s voluntary payments.