The implementation of Goods and Services Tax (GST) on 1 July 2017 was a landmark tax reform in India that replaced multiple indirect taxes with a unified taxation system. This study examines the impact of GST on the Indian FMCG manufacturing sector during the period 2015–2024, covering both pre-GST (2015–2017) and post-GST (2018–2024) phases. The analysis focuses on six leading FMCG companies: Hindustan Unilever Limited (HUL), ITC Limited, Nestlé India, Dabur India, Britannia Industries, and Marico Limited.

The study is based on secondary data collected from company annual reports, government publications, GST Council reports, SEBI filings, and industry studies. Descriptive statistics, trend analysis, CAGR, ratio analysis, and comparative benchmarking techniques were used to evaluate changes in pricing, input tax credit benefits, supply chain efficiency, and profitability.

The findings reveal that GST contributed to lower effective tax rates, improved logistics and warehouse efficiency, reduced operational costs, and enhanced profitability across the selected companies. Although businesses faced initial implementation challenges, the overall impact of GST on the FMCG sector has been positive. The study confirms that GST significantly influenced product pricing and improved supply chain and operational performance in the Indian FMCG manufacturing industry.