PurposeAlthough zakat is a principal way to redistribute wealth, a unique practice designed to achieve a sustainable Islamic economic and social system, zakat institutions and agencies in most Muslim countries still suffer from the perplexing issue of low zakat collections, ascribing this to the level of compliance among zakat payers. To provide more insight into this lacuna, this study aims to examine the role of trust in zakat institution through the relationship between socio-economic determinants (i.e. religiosity, moral reasoning, peer influence and system fairness) and zakat compliance decisions.Design/methodology/approachFrom a typical Islamic country, Yemen, a random sample of 274 entrepreneurs was drawn for a self-administered survey. To estimate and analyze the compliance model, SmartPLS structural equation modeling was used.FindingsThe results show that all hypothesized direct relationships are supported. Importantly, the trust-moderated interactions of religiosity, moral reasoning and peer influence on zakat compliance are significant, although its interaction with zakat system fairness is not.Practical implicationsThe results should be helpful for policymakers and responsible institutions in Muslim communities to understand how different levels of trust can play an important role in Zakat payers’ compliance to boost or erode zakat funds. This research also contributes important inferences for managers about the necessity of inculcating religious and moral values among zakat payers, formulating a fair system and embarking on sensitization programs in society.Originality/valueThe research enriches the scanty literature by validating a viable compliance model drawing on the socio-economic theory of regulatory compliance. Moreover, the model integrates the moderating role of trust in socio-economic perspectives of zakat compliance.