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Our calculators use the exact tariff slabs and rates from each DISCOM's latest approved tariff order. We include fixed charges, applicable surcharges, and electricity duty in the calculation. The results should match your actual bill within 2–5%, with any remaining difference typically explained by fuel surcharge adjustments (FSA) that vary quarterly. We update our data within 72 hours of any state tariff revision.

Maharashtra (MSEDCL) has one of the widest tariff ranges — low for the first 100 units but climbing to ₹9.35/unit for consumption above 500 units. West Bengal (WBSEDCL) starts at ₹5.00/unit from the very first unit, making it expensive for low consumers. Punjab (PSPCL) and Haryana (DHBVN) also have above-average rates. Gujarat (PGVCL) and some northeast states consistently have the lowest domestic tariffs.

Use our AC bill calculator: enter your AC's star rating (1–5 star), tonnage (0.75T to 2T), estimated daily usage hours, and your electricity rate per unit. The calculator applies the correct watt-hour consumption for that BEE star rating and gives you an exact monthly and annual cost. Most 1.5-ton 5-star inverter ACs running 8 hours/day cost ₹1,200–₹2,000/month depending on your state's electricity rate.

For most homeowners, yes — especially with the PM Surya Ghar subsidy reducing upfront costs and net metering allowing bill credits for surplus export. The average payback period for a 3kW rooftop system is now 4–6 years, down from 8–10 years five years ago. States with high tariffs (Maharashtra, West Bengal, Punjab) and high solar irradiance (Rajasthan, Gujarat, Tamil Nadu) see the best returns. Use our Solar ROI Calculator for a precise calculation.

The PM Surya Ghar scheme provides central government subsidies for rooftop solar installations: ₹30,000 for 1kW systems, ₹60,000 for 2kW systems, and ₹78,000 for 3kW and above systems. This is in addition to any state-level subsidies. The scheme targets 1 crore Indian households. Use our PM Surya Ghar subsidy calculator to check your exact eligibility and combined central + state subsidy amount.

The highest-impact behaviour changes: Set your AC to 24°C (not 18°C) — saves ₹700–₹1,400/month in summer. Use ceiling fans with the AC — allows thermostat set 2°C higher. Turn off set-top boxes, routers, and TVs from the socket when not in use — standby power costs ₹100–₹200/month. Shift heavy appliance usage (washing machine, geyser) to morning off-peak hours. These changes alone typically reduce bills by 15–25%.

A non-inverter AC compressor runs at fixed speed — it's either fully ON or fully OFF, cycling on and off to maintain temperature. An inverter AC compressor can vary its speed to match the cooling demand, running continuously at lower power. Inverter ACs are 30–50% more efficient and maintain more stable temperatures. All modern 5-star rated ACs in India are inverter type. The payback on the price difference is typically 2–4 years through electricity savings.

Most State Electricity Regulatory Commissions (SERCs) revise tariff rates annually, usually effective from April 1 (start of India's financial year). Some states revise every 2–3 years. In between revisions, DISCOMs can apply quarterly Fuel Surcharge Adjustments (FSA) to reflect changes in fuel costs. Desi Utility updates all calculator rates within 72 hours of any approved tariff revision announcement.