Mexico’s Soda Tax as a Public Health Lever: A Case Study on Tackling Obesity and Diabetes through Fiscal Policy

Non-communicable diseases (NCDs) are the leading cause of mortality in Mexico, driven largely by rising rates of obesity and diabetes and exceptionally high sugar-sweetened beverage (SSB) consumption. In response, Mexico introduced a nationwide excise tax of 1 peso per litre on SSBs in 2014 to reduce intake and generate revenue for health-promoting initiatives. This case study outlines the context leading to the tax, the design and implementation of the intervention, and the outcomes observed to date. Evidence shows a sustained reduction in SSB purchases – 6% in the first year and 10% in the second – reaching 17% among low-income households. The tax also promoted product reformulation and increased bottled-water purchases. While long-term health effects continue to be evaluated, modelling predicts significant reductions in obesity and type 2 diabetes if the tax is maintained. Despite challenges, including industry resistance, equity concerns, and inconsistent revenue allocation, Mexico’s experience demonstrates that fiscal policies can meaningfully influence consumption behaviours and provide a valuable model for global NCD prevention.