Electricity billing for domestic connections in Tamil Nadu follows a progressive slab structure administered by TANGEDCO (Tamil Nadu Generation and Distribution Corporation). Understanding how your bill is calculated helps in managing energy usage effectively.
Key Calculation Factors:
Bi-Monthly Billing Cycle: Electricity meter readings for domestic households in Tamil Nadu are typically taken once every two months (60 days).
100 Free Units Subsidy: The Government of Tamil Nadu provides 100 units of electricity free of charge for all domestic connections in every billing cycle.
Tiers and Slab Rates: Unit charges increase progressively based on total consumption. If total usage crosses specific thresholds, higher slab rates apply to units exceeding earlier bounds.
TNEB Domestic Tariff Slab Rates (Tariff IA)
Below is the slab breakdown used by our online TNEB bill calculator for bi-monthly domestic consumption:
Bi-Monthly Slabs
Rate per Unit (₹)
Government Subsidy Status
0 - 100 Units
₹ 0.00
100% Free Power Scheme
101 - 200 Units
₹ 4.95
Subsidized Tier
201 - 400 Units
₹ 6.65
Standard Tier
401 - 500 Units
₹ 8.80
Higher Consumption Tier
501 - 600 Units
₹ 9.95
High Usage Slab
601+ Units
₹ 11.05 - ₹ 12.15
Maximum Tier Rate
How to Read Your TNEB Meter Units
Calculating your bill accurately starts with reading your digital single-phase or three-phase electric meter. Follow these steps:
Locate your electricity meter outside your home or in the main electrical cabinet.
Wait for the digital display to cycle through parameters until it shows kWh (Kilowatt-hours).
Note down the current kWh reading.
Subtract the previous kWh reading (found on your last electricity bill receipt) from the current reading. The result is your total units consumed.
Frequently Asked Questions (FAQ)
Is this TNEB bill calculator updated with the latest tariff rates? Yes, our online TNEB bill calculator reflects current domestic tariff rules, incorporating fixed charges, tax rates, and free power allowances.
Is the first 100 units free for all domestic users in Tamil Nadu? Yes, under the state welfare scheme, the first 100 units consumed in domestic connections are subsidized 100% by the government.
Can I use this tool for commercial electricity bill calculations? This specific utility focuses on domestic connections (Tariff IA). Commercial and industrial connections follow separate tariff structures (Tariff III / V).
About This Utility
This TNEB bill calculator was developed to provide consumers across Tamil Nadu with a quick, simple, and transparent way to estimate their domestic electricity costs. By inputting your unit consumption, you can plan energy usage and prevent unexpected bill amounts.
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Disclaimer: This website is an independent informational utility tool designed to help users calculate estimated electricity costs in Tamil Nadu. It is not affiliated with, authorized by, or associated with TANGEDCO or the Government of Tamil Nadu.
