Tamil Nadu White Paper flags stagnation in petrol, diesel consumption growth
The Government of Tamil Nadu, in a White Paper released on June 16, 2026, has drawn attention to a notable deceleration in the state's consumption of petrol and diesel. Despite a real Gross State Domestic Product (GSDP) growth rate of approximately 7 per cent per annum over the last decade, the growth in fuel consumption has remained subdued, signalling a structural shift in energy demand.
According to the document, diesel consumption, which stood at 750 crore litres in 2016-17, saw a sharp decline to 564 crore litres during the pandemic year of 2020-21. It gradually recovered to reach 770 crore litres by 2025-26. However, the White Paper emphasises that, in absolute terms, diesel consumption has remained essentially flat over the ten-year period. Petrol consumption, on the other hand, grew steadily from 312 crore litres in 2016-17 to 532 crore litres in 2025-26, marking a Compound Annual Growth Rate (CAGR) of around 6 per cent. While this indicates growth, it still lags behind the state's overall economic expansion.
The White Paper identifies the drivers of this volume stagnation as structural. Key factors include improving fuel efficiency in vehicles, the rapid adoption of Compressed Natural Gas (CNG) and electric vehicles (EVs), and changes in freight traffic patterns. The document notes, "With the ongoing energy transition, the trajectory of this revenue head is likely to deteriorate further." This points to a long-term decline in the contribution of traditional fuels to the state's energy mix.
The implications are significant for Tamil Nadu's fiscal position, as taxes on petrol and diesel have historically been a major source of revenue. The White Paper's findings suggest that the state may need to explore alternative revenue streams or adjust its fiscal strategies to accommodate this evolving energy landscape. The shift also resonates with broader national and global trends towards cleaner energy and sustainable mobility, highlighting the need for policy adaptation.