RT Journal Article T1 When Harmful Tax Expenditure Prevails over Environmental Tax: An Assessment on the 2014 Mexican Fiscal Reform A1 López Pérez, Sugey de Jesús A1 Vence Deza, Xavier K1 Environmental taxation K1 Tax benefits K1 Tax expenditure K1 Carbon tax K1 Harmful tax expenditure AB This article examines the role of environmental taxation in mitigating environmental problems and contributing to sustainability in Mexico. It focuses on environmental tax revenues and tax expenditures since the 2014 Public Financial Reform (PFR), according to pro- or anti-environmental orientation. The research carried out combines the study of the regulation of the selected tax instruments, their classification and the empirical analysis of the tax revenues and tax expenditures associated with the different taxes over the periods of validity of the taxes and benefits studied, using the databases of the CIAT and the Mexican SHCP. A critical analysis addresses the weak environmental function of environment-related taxes (IEPS, ISAN…), as well as the late implementation and reduced impact of the carbon and pesticide taxes introduced in 2014. The evolution of tax incentives and expenditure is thoroughly examined by examining both environmental measures, which have evolved positively but within a very reduced level, and the most prevalent tax expenditure measures, with harmful impacts to the environment. Based on the results obtained, long-term structural changes in the Mexican tax system are suggested. As for the short to medium term, profound changes in tax expenditure are proposed to eliminate of those tax benefits harmful to the environment, introduce of tax benefits for circular activities (e.g., repairing, reusing and remanufacturing) and broaden the carbon tax base and rates. The conclusions include recommendations for moving towards a systemic green tax reform that assists the transformation towards a sustainable economy. PB MDPI YR 2021 FD 2021 LK http://hdl.handle.net/10347/32247 UL http://hdl.handle.net/10347/32247 LA eng NO López Pérez, S. D. J., & Vence, X. (2021). When harmful tax expenditure prevails over environmental tax: An assessment on the 2014 Mexican fiscal reform. Sustainability, 13(20), 11269. NO The authors belong to the ICEDE-Galician Competitive Research Group GRC ED431C2018/23 and to the “R2π: Transition from linear 2 circular: Policy and Innovation” H2020 Project. This research was supported by the Spanish Innovation Agency (AEI) through the project ECO-CIRCULAR: “La estrategia europea de transición a la economía circular: un análisis jurídico prospec-tivo y cambios en las cadenas globales de valor”—ECO2017-87142-C2-1-R. All these projects are co-funded by FEDER (UE). This research also received funding support from the National Council for Science and Research (CONACYT) México, PNPC 000625. DS Minerva RD 23 abr 2026