The purpose of this study is to identify multi‐level determinants of company support for employee volunteering (CSEV). This study surveyed 251 senior managers in firms operating in the USA. Multiple regression analysis was used to uncover multi‐level antecedents of CSEV. In addition, we conducted logistic regression to identify which factors predict whether employees in general and executive managers participate in volunteering. The results of this study showed that humanistic culture and stakeholder pressure on corporate social responsibility (CSR) were significantly related to CSEV. Findings from logistic regression indicated that employees volunteered more when a company had higher levels of humanistic culture and perceived more pressure on CSR from stakeholders. For a corporation to successfully implement CSR initiatives through employee volunteering, this study suggests that a senior manager should recognize two major determinants of CSEV: humanistic culture and stakeholder pressure on CSR. Copyright © 2014 John Wiley & Sons, Ltd and ERP Environment