The current research examines the effect of perceived corporate social responsibility (PCSR) on social sustainability (SS), taking into account the sequential mediating effects of organizational identification (OID) and organizational citizenship behavior (OCB). Based on social identity and social exchange theories, a total of 396 employees of Delhi NCR-based companies were surveyed, and data were analyzed employing SPSS 22 and Smart PLS 4 software. The findings affirm the significant positive effect of PCSR on social sustainability directly and indirectly by boosting employee identification and OCB. Theoretically, the current study extends earlier models by combining psychological and behavioral mechanisms, connecting CSR to sustainable performance. Practically, it points out the way organizations can utilize CSR to reinforce internal culture and encourage socially responsible behavior.