How often are petrol and diesel prices updated in India?

Petrol and diesel prices in India are updated daily at 6:00 AM IST. This system is known as dynamic fuel pricing (or daily price revision), which ensures that even minute variations in international crude oil prices and currency exchange rates are reflected in retail prices.

Why do petrol and diesel prices vary from state to state?

Fuel prices vary across states due to local taxes (Value Added Tax or VAT) levied by different state governments. In addition, transportation/freight costs from oil refineries to retail pumps in different regions also contribute to the price differences.

Is GST (Goods and Services Tax) applicable on petrol and diesel?

No, petroleum products (petrol, diesel, crude oil, natural gas, and aviation turbine fuel) are currently excluded from the GST regime. Instead, they are subject to Central Excise Duty and State VAT.

Who determines the daily petrol and diesel prices in India?

State-run Oil Marketing Companies (OMCs) — namely Indian Oil Corporation Limited (IOCL), Bharat Petroleum Corporation Limited (BPCL), and Hindustan Petroleum Corporation Limited (HPCL) — determine the prices daily based on the average international rate of crude oil and foreign exchange rates.

How can I calculate my monthly fuel cost?

You can easily estimate your fuel expenses using our free online Fuel Cost & Mileage Calculator. Simply input your total travel distance, your vehicle's mileage, and the current price per liter in your city to get instant results.

Tamil Nadu Petrol & Diesel Price Today [July 25, 2026]

District-wise Fuel Prices in Tamil Nadu

District	Petrol Price	Diesel Price
Ariyalur	₹108.23	₹100.05
Chengalpattu	₹109.10	₹100.92
Chennai	₹109.10	₹100.92
Coimbatore	₹109.57	₹101.11
Cuddalore	₹109.10	₹100.92
Dharmapuri	₹108.79	₹100.61
Dindigul	₹108.46	₹100.30
Erode	₹108.79	₹100.61
Kallakurichi	₹109.10	₹100.92
Kanchipuram	₹109.10	₹100.92
Kanniyakumari	₹108.73	₹100.58
Karur	₹108.79	₹100.61
Krishnagiri	₹108.79	₹100.61
Madurai	₹108.46	₹100.30
Mayiladuthurai	₹109.10	₹100.92
Nagapattinam	₹109.10	₹100.92
Namakkal	₹108.79	₹100.61
Nilgiris	₹109.57	₹101.11
Perambalur	₹108.23	₹100.05
Pudukkottai	₹108.23	₹100.05
Ramanathapuram	₹108.92	₹100.76
Ranipet	₹109.10	₹100.92
Salem	₹108.79	₹100.61
Sivaganga	₹108.46	₹100.30
Teni	₹108.79	₹100.62
Tenkasi	₹108.73	₹100.58
Thanjavur	₹108.23	₹100.05
Thiruvarur	₹109.10	₹100.92
Tiruchchirappalli	₹108.23	₹100.05
Tirunelveli	₹108.73	₹100.58
Tirupathur	₹108.79	₹100.61
Tirupur	₹109.57	₹101.11
Tiruvallur	₹109.10	₹100.92
Tiruvannamalai	₹109.10	₹100.92
Tuticorin	₹108.73	₹100.58
Vellore	₹109.10	₹100.92
Viluppuram	₹109.10	₹100.92
Virudunagar	₹108.63	₹100.47

Frequently Asked Questions

Even within Tamil Nadu, petrol and diesel prices vary slightly between districts. This variation is mainly due to freight charges and transportation costs involved in delivering the fuel from local oil depots or refineries to the petrol pumps in that specific district.

Fuel retail prices in Tamil Nadu consist of the base price, dealer commission, Central Excise Duty, and the Tamil Nadu State Value Added Tax (VAT). State VAT is percentage-based, making it one of the largest components of the retail price.

About Petrol & Diesel Prices in Tamil Nadu

Fuel prices in Tamil Nadu change daily at 6:00 AM based on the dynamic fuel pricing model. But what exactly makes up the final retail price you pay at the pump?

State Taxes (VAT)

The Tamil Nadu government levies Value Added Tax (VAT) on fuel, which is a major component of the final price.

Central Excise Duty

This is a fixed tax collected by the Central Government across all states in India.

Transportation Costs

Prices vary between districts in Tamil Nadu due to the distance from the nearest oil refinery or depot.

Daily Price Revision: Oil Marketing Companies (IOCL, BPCL, HPCL) revise prices daily based on international crude oil prices and foreign exchange rates. Bookmark this page for the latest updates in Tamil Nadu!

Quick Summary

State: Tamil Nadu
Total Districts: 38