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Tamil Nadu • Effective 2025-07-01

TNEB / TANGEDCO Per Unit Electricity Rate (2026)

Tamil Nadu Generation and Distribution Corporation. Domestic per-unit rates from ₹0.00 to ₹8.40 per kWh — plus commercial and industrial slabs, FAC and duty. Latest SERC-approved tariff.

Slab 1 rate

₹0.00

first 100 units

Top slab

₹8.40

per unit

Eff. @ 100u

₹0.27

all-in /unit

Full TNEB / TANGEDCO bill calculator All Tamil Nadu rates

TNEB / TANGEDCO domestic slab rates

Energy charge per unit — the headline price you see on your bill. Excludes fixed, FAC and duty.

Slab (units / month) Energy rate (₹/unit)
1 – 100 ₹0.00
101 – 200 ₹2.35
201 – 400 ₹4.70
401 – 500 ₹6.30
Above 500 ₹8.40
Fixed charges
Slab-based
FAC / FPPCA
—
Electricity duty
6%
Telescopic
Yes

Commercial (LT) per-unit rates

For shops, offices and small businesses on a LT-2 / commercial connection.

Slab (units / month) Energy rate (₹/unit)
Above 0 ₹8.95
Fixed charges
₹80/kW/mo
FAC / FPPCA
—
Electricity duty
6%
Telescopic
No

Industrial (LT) per-unit rates

For LT industrial consumers — typically a flat per-unit rate.

Slab (units / month) Energy rate (₹/unit)
Above 0 ₹7.50
Fixed charges
₹70/kW/mo
FAC / FPPCA
—
Electricity duty
6%
Telescopic
No

Effective TNEB / TANGEDCO per-unit rate by consumption

All-in rate (energy + fixed @ 2 kW + FAC + duty) at common monthly consumption levels. Excludes subsidy.

At 50 units/month

₹0.53

≈ ₹27 bill

At 100 units/month

₹0.27

≈ ₹27 bill

At 150 units/month

₹1.01

≈ ₹151 bill

At 200 units/month

₹1.38

≈ ₹276 bill

At 300 units/month

₹2.58

≈ ₹774 bill

At 500 units/month

₹3.88

≈ ₹1,940 bill

At 1000 units/month

₹6.39

≈ ₹6,392 bill

For your actual figure with your sanctioned load and subsidy eligibility, use the TNEB / TANGEDCO bill calculator.

About TNEB / TANGEDCO tariff structure

Tamil Nadu Generation and Distribution Corporation bills domestic consumers using a telescopic slab structure. Each slab applies only to the units within that range, so adding a few more units never reprices your earlier (cheaper) units.

Beyond energy charges, the TNEB / TANGEDCO bill includes a fixed charge of a load-band based amount on your sanctioned load, an FAC pass-through of ₹0.00/unit (revised monthly), and Tamil Nadu electricity duty of 6%.

We verify TNEB / TANGEDCO rates against the latest SERC tariff order quarterly. Last verified: 2026-04-22. Original source: official tariff order.

TNEB / TANGEDCO per-unit rate — common questions

Answers to the most common electricity bill questions in India.

What is the per unit electricity rate of TNEB / TANGEDCO in 2026?
TNEB / TANGEDCO domestic energy charges start at ₹0.00/unit for the first 100 units and rise to ₹8.40/unit at the highest slab. Slabs are telescopic — only units within each slab are billed at that rate. See the full slab table on this page. Effective 2025-07-01.
How much will 1 unit of electricity cost on my TNEB / TANGEDCO bill?
1 unit (1 kWh) is billed at the slab rate that applies to your monthly consumption — starting at ₹0.00/unit. The effective rate on your bill is higher because of fixed charges (₹—/kW), FAC, and electricity duty (6%). At a 100-unit monthly consumption, the all-in rate is roughly ₹0.27/unit.
What is the commercial per-unit rate for TNEB / TANGEDCO?
TNEB / TANGEDCO commercial (LT) energy charges start at ₹8.95/unit and go up to ₹8.95/unit. Commercial fixed charges are ₹80/kW/month — typically higher than domestic. Industrial (LT) is usually a flat ₹7.50/unit.
What is the FAC and electricity duty for TNEB / TANGEDCO?
TNEB / TANGEDCO currently passes through ₹0.00/unit as Fuel Adjustment Charge (FAC / FPPCA — varies monthly). Tamil Nadu electricity duty is 6% on the energy + fixed + FAC base. These add to your effective per-unit cost beyond the headline slab rate.
How often does TNEB / TANGEDCO change its per-unit rates?
Slab rates are revised through the annual SERC tariff order — typically effective from 1 April each financial year. The current TNEB / TANGEDCO rates are effective from 2025-07-01. FAC is revised more frequently (often monthly) to reflect fuel cost movements.