Purpose – The purpose of this paper is to investigate the value of the Certified B Corporation (B Corp) structure for a long-term commitment to corporate social responsibility (CSR) achievements. Organizations of all sizes are now focusing on commitment to achieving social purposes beyond philanthropy and on reporting their CSR performance as a means of accountability. Design/methodology/approach – The authors studied 45 Founding Certified B Corps to check how many had maintained their certification by filing B Impact Reports with B Lab, how many Impact Reports they had filed and if the reports showed progress toward CSR goals. Findings – The results showed that all Founding B Corps submitted multi-year B Impact Reports, made progress toward CSR goals, maintained their commitment to a social contribution and made profit from 2010 to 2015. The B Impact Reports identified their goals and progress in the five Impact areas that were then assessed by B Lab. Practical implications – The Certified B Corp structure can be confidently used by small companies that desire to do good and want an outside assessor to help establish CSR goals and provide a method for accountability. The reports are published on the B Lab Web site, providing an additional means of publishing CSR accomplishments. Originality/value – This research provides information for those businesses, particularly small ones, that wish to establish their commitment to CSR in a public way and are certified by a third-party assessor.