TNEB Bill Calculator 2026 Updated for 2026
Accurate Tamil Nadu electricity bill estimation — domestic & commercial tariffs, electricity tax, fixed charges, and subsidy insights.
Instant TNEB Bill Calculator
Select connection type and enter units consumed (kWh) to calculate estimated bill amount based on latest 2026 tariff.
📋 Bill Estimate (₹)
*Tariff slabs based on TNEB latest order (FY 2026). Fixed charges and electricity tax (5%) applied. Actual bill may vary with sanctioned load, demand charges.
How is TNEB Bill Calculated? (Formula & Components)
Understanding tneb bill calculation formula helps you verify your monthly/bi-monthly charges. TNEB (TANGEDCO) follows progressive slab rates for domestic consumers, while commercial connections pay a uniform per-unit rate. The final bill includes:
- Energy charges – based on tariff slab × units consumed
- Fixed charges / customer charges – depends on sanctioned load (₹30 for domestic, ₹100 for commercial general)
- Electricity Tax (EC) & Additional Surcharge – 5% of total (energy + fixed) in most urban areas
- Subsidy adjustments – first 100 units free for domestic (already accounted in slabs)
Exact formula: Bill Amount = (Energy Charges + Fixed Charges) + 5% Electricity Tax. Our tneb bill calculator replicates this logic with 2026 tariff orders.
TNEB Tariff Structure 2026
| Consumer Category | Consumption Slab (units/month) | Energy Charge (₹/unit) | Fixed Charge (₹/month) |
|---|---|---|---|
| Domestic (LT-I A) | 0 – 100 units | ₹0 (fully subsidized) | ₹20 |
| 101 – 200 units | ₹2.50 per unit | ₹30 | |
| 201 – 500 units | ₹5.00 per unit | ₹40 | |
| > 500 units | ₹7.50 per unit | ₹50 | |
| Commercial (LT-III) | All units (flat) | ₹8.50 / unit | ₹100 |
*Domestic slabs are cumulative: first 100 units free, then progressive rates. Updated for 2026 financial year.
Step-by-Step: How to Calculate TNEB Bill Manually (with example)
Example scenario: Domestic connection, consumption = 275 units (May 2026). Let’s calculate the TNEB bill amount.
- Slab breakdown: First 100 units → ₹0. Next 100 units (101–200) → 100 × ₹2.5 = ₹250. Remaining 75 units (201–275) → 75 × ₹5 = ₹375. Total energy charge = ₹250 + ₹375 = ₹625.
- Fixed charge: For 275 units, fixed charge = ₹40 (as per 201–500 slab).
- Subtotal: ₹625 + ₹40 = ₹665.
- Electricity tax (5%): ₹665 × 0.05 = ₹33.25.
- Total bill = ₹698.25 (rounded to ₹698).
Our online tneb bill calculator automates this instantly. For commercial example: 275 units × ₹8.5 = ₹2,337.5 + fixed ₹100 = ₹2,437.5 + 5% tax = ₹2,559.38.
7 Smart Tips to Reduce Your TNEB Bill (2026 Guide)
- Switch to 5-star rated appliances – BEE star labels reduce units by 25-40%.
- Use LED lights instead of CFL / incandescent bulbs (saves 80% lighting energy).
- Set AC temperature at 24°C and service regularly to maintain efficiency.
- Install solar rooftop – TNEB offers net metering, drastically cuts bill for high users.
- Monitor “phantom load”: unplug devices on standby (TV, set-top box, chargers).
- If you are a domestic consumer staying under 100 units, your bill becomes zero after subsidy.
- Apply for “TNEB Online Bill Calculator” usage habit analysis – compare historical bills monthly.
Exclusive: TNEB Bill Verification Checklist
Before paying, cross-check using this tneb bill calculator online tool or manual method:
- ✅ Verify meter reading (current - previous) matches billed units.
- ✅ Check if “consumer category” is correctly mentioned (domestic/commercial).
- ✅ Ensure fixed charges align with sanctioned load (kW).
- ✅ Confirm electricity tax % applied (5% generally).
- ✅ For defective meter, lodge complaint via TNEB app and use average billing estimate.
- ✅ For high bills during summer, recalculate with our tneb current bill calculator.
TNEB Tariff Revisions 2026 vs 2025 – What Changed?
As per 2026 Tamil Nadu regulatory commission, domestic energy charges for 201-500 units remained at ₹5/unit, but fixed charges increased by ₹5 for 201-500 slab. Commercial tariff unchanged at ₹8.5/unit, but additional surcharge rationalised. For accurate estimation, always rely on tneb bill calculator 2026 that reflects latest rates.
| Slab | 2025 Rate (₹/unit) | 2026 Rate (₹/unit) | Change |
|---|---|---|---|
| 0-100 units | 0 | 0 | No change |
| 101-200 units | 2.40 | 2.50 | +0.10 |
| 201-500 units | 4.80 | 5.00 | +0.20 |
| Above 500 | 7.25 | 7.50 | +0.25 |
Frequently Asked Questions (TNEB Bill)
Use our tneb bill calculator above: choose domestic/commercial, input units, get instant estimate with tax. No registration required.
Yes, Tamil Nadu government provides 100 units free subsidy for domestic connections. Our calculator reflects zero energy charges for first 100 units.
For Low Tension (LT) commercial, flat ₹8.50 per unit + fixed charges ₹100/month + 5% electricity tax. Use commercial tab in calculator.
TNEB averages last 3 months consumption. You can also manually estimate using our tool by entering average units.
Electricity duty / tax is 5% on energy+fixed charges (not GST). GST is not applicable on domestic bills.
Visit tangedco.gov.in for tariff notifications. Our calculator aligns with 2026 orders.
This version covers domestic & commercial (LT). For HT industrial, demand charges and power factor penalties apply. Contact TNEB for exact industrial bill.
Important Disclaimer
This TNEB bill calculator provides estimated bills based on Tamil Nadu tariff slabs (2026). Actual TNEB/TANGEDCO bill may vary depending on sanctioned load, power factor, delayed payment surcharge, or other regulatory revisions. For official billing disputes, refer to your monthly bill copy or TNEB portal. TotalCalcHub does not guarantee exactness and is not liable for financial decisions.