Clean Development Mechanism (CDM) is driving low-carbon projects and transfer of technology by the corporate that aligns with the global shifts towards net-zero economy. The study intended to analyse Carbon emission reduction in achieving Certified Carbon Emission (CERs) through CDM by the Public and Private Limited Companies in India under UNFCCC. The secondary data on CERs derived from UNFCCC were used and analyzed descriptive statistics. The study found that wind energy, hydropower and solar energy were used in recognition of CERs by Private sector Firms and the Public Limited Companies have utilised primarily wind energy, energy from managing wastes, solar energy and hydro power. The number of sustainable projects has increased during the latter part of the study period. The study will be useful to wide range of audiences and stakeholders including investors, bankers, companies, Government, CER issuers and auditors to achieve Net Zero