Present study explored thermo-enviro-economic analysis of commercial scale conventional steam distillation system for peppermint oil extraction. Effect of peppermint batch sizes on energy measures, net CO2 mitigation and net carbon credit earned are also investigated. Life cycle energy production factor (EPFs) and life cycle conversion efficiency (LCCE) are estimated to be 29.2, 33.1 and 38.9, and 12.6 %, 14.8 % and 17.9 % for 1500, 1700 and 1900 kg batch sizes, respectively, for 18 years of life span. Maximum energy and fuel consumption were 4,966 MJ and 193 kg for 1500 kg, respectively. Plant is anticipated to produce 24 kiloliters of peppermint oil per year with an estimated annual selling price of US$153,960 and profit after tax (PAT) of US$15,592 at a tax rate of 18 %. Return on investment (ROI), internal rate of return (IRR) and payback period (PBP) were 73.9 %, 85.7 % and 1.26 years, respectively. Distillation system has a total embodied energy of 166,237 kWh. Lifetime CO2 mitigation and net carbon credit earned are estimated to be 426.6, 438.5 and 568.8 tonnes and ₹1,95,239 (US$2,383.9), ₹2,63,049 (US$3,211.9) and ₹3,61,518 (US$4,414.3) for 1500, 1700, and 1900 kg batch size, respectively, if traded at the rate of 14.85 $/tonne. Profitability analysis pilot plant is highly rewarding and must be captivating for investors.