PurposeThe purpose of this study is to explore the awareness and willingness level of millennials in Indonesia toward cash waqf (cash endowment). Cash waqf has gained huge attention in Indonesia because of its flexibility, especially after officially announcing that cash waqf practices are sharia-compliant in 2002 in the country. Millennials comprise 33.75% of the total Indonesian population. Therefore, it is vital to analyze cash waqf from an Indonesian perspective. This study provides vital information for all institutions that are concerned with the enhancement of the cash waqf contributions in Indonesia.Design/methodology/approachSelf-structured questionnaires were distributed in Java Island to collect the data. The data were examined by employing suitable statistical tools. Besides, post-interview fact-finding was conducted with cash waqf experts from different related institutions in Indonesia to reach a more in-depth understanding about cash waqf issues.FindingsThe results depict a high level of awareness about cash waqf among millennials in Indonesia. The results further reveal a lower willingness level to contribute to cash waqf of the sample population as compared to their level of awareness about cash waqf. Moreover, cash waqf promotions must focus on delivering a deeper understanding about the concept and how it differs from other types of Islamic philanthropy. The results suggest that waqf trustees in the country must be more transparent. Moreover, the Indonesian Waqf Board should implement stricter rules to monitor waqf trustees.Research limitations/implicationsThis research concerns the willingness and awareness toward cash waqf among Indonesian Muslims who were born between 1980 and 2000.Practical implicationsAs a Muslim-majority country, one would expect Indonesia to make much progress in cash waqf. By providing an explanatory understanding of willingness and awareness of cash waqf among Indonesians, this research can be helpful in designing proper educative marketing campaigns for future endowers to cash waqf activities to ensure cash waqf institutions provide efficient services. It is advisable to emphasize the transparency of waqf organizations. This will add to the nazhir's (waqf trustee) reputation, thereby boosting waqf's national shares by ensuring a proper allocation of cash waqf. The regulator should be more strict in monitoring nazhir’s practices. For instance, it could include a periodic assessment of waqf entities.Originality/valueThis study is original in nature; there is no previous study that addresses the millennial’s perspective toward cash waqf in Indonesia. Hence, this study presents precious information for policy makers, practitioners and researchers.