Electricity Bill Calculator
Accurate bill estimates for Indian states
Results are approximate. Actual bills may vary.
Your Estimated Bill
Slab-wise Consumption
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| Component | Amount |
|---|---|
| Grand Total | ₹ 0 |
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6-Month Bill Forecast
Estimated bills based on seasonal patterns
TNEB Electricity Bill Calculator – Tamil Nadu
The TNEB/TANGEDCO electricity bill calculator estimates your bill using the latest TNERC-approved domestic tariff (LT-IA), effective 1 July 2025. Tamil Nadu’s domestic tariff is officially bi-monthly and telescopic — each slab rate applies only to the units within that band. Households using up to 500 units per bi-month get 200 free units; above 500 units, the free quota is 100 units. The calculator above shows the equivalent monthly figures for easy estimation. This TNEB electricity bill calculator uses the equivalent monthly figures throughout for easy comparison.
Note: TANGEDCO’s distribution business was renamed Tamil Nadu Power Distribution Corporation Limited (TNPDCL) in 2024 as part of a state-wide restructuring. Billing rules, tariffs, and consumer service channels continue unchanged under the new name — we use “TNEB / TANGEDCO” here because that’s still how most Tamil Nadu consumers search, with TNPDCL noted for accuracy below. Looking for other states? Visit our homepage to find calculators for all Indian states.
How to Use the TNEB Electricity Bill Calculator
1. Select Tamil Nadu from the state dropdown (pre-selected on this page)
2. Choose your connection type — Residential (LT-1A), Commercial (LT-2), or Industrial (LT-3)
3. Enter your sanctioned load in kW as shown on your service connection order
4. Enter the total units consumed from your latest TANGEDCO/TNPDCL bill
5. Click Calculate to get your instant slab-wise bill breakdown
Live in a different state? Try our Karnataka (BESCOM) Bill Calculator or Kerala (KSEB) Bill Calculator.
“This TNEB electricity bill calculator updates your slab-wise breakdown instantly as you enter values above.”
How to Read Your TNEB Electricity Meter
Your TANGEDCO/TNPDCL electricity meter, read correctly, is the starting point for TNEB electricity bill calculator. Most Tamil Nadu homes now use digital or smart meters, which show the current reading directly on a display that cycles automatically between reading, load, and voltage. For older meters, read the number shown before the decimal point.
To estimate your bill using this estimator, note your current reading and subtract your previous bill’s “present reading” to get units consumed for the period. Enter that figure above for an instant estimate, including the free 100-unit benefit.
TANGEDCO bills residential consumers on a bi-monthly cycle, so remember to halve your two-month reading if you want a monthly view, or enter the full two-month units for an accurate cycle estimate. Tamil Nadu is rolling out smart meters across Chennai and major towns, letting consumers track real-time consumption through the TANGEDCO app rather than reading the physical meter.
“Keeping an accurate reading handy makes the TNEB electricity bill calculator’s estimate more precise.”
Sample Calculation: 250-Unit TNEB Bill
Here’s a worked example for a residential (LT-1A) consumer using 250 units in a month:
- Slab 1 (0–100 units): FREE
- Slab 2 (101–200 units): 100 × ₹4.70 = ₹470.00
- Slab 3 (201–250 units): 50 × ₹6.30 = ₹315.00
- Energy charge subtotal: ₹785.00
Fixed charge (approx., based on load): ₹0–₹60 · Electricity tax: exempt for domestic LT-1A · Meter rent: ₹20 (approx.) · Fuel surcharge: variable, assumed ₹0 for this example.
Estimated total: ₹785.00 + ₹60 + ₹20 = ₹865.00 (approx.). Enter 250 in the calculator above to see this exact breakdown, including the current fuel surcharge where applicable. This is exactly the math the TNEB electricity bill calculator runs behind the scenes for any 250-unit input.
Sample Bills at a Glance
The TNEB electricity bill calculator uses these same slabs to generate the quick-reference figures below.
| Monthly Units | Free Units Used | Energy Charge | Approx. Total (with fixed + meter rent) |
| 80 units | 80 (fully free) | ₹0 | ₹80 – ₹100 |
| 150 units | 100 free + 50 @ ₹4.70 | ₹235 | ₹315 – ₹335 |
| 250 units | 100 free + 150 telescopic | ₹785 | ₹845 – ₹865 |
| 350 units | 100 free + 250 telescopic | ₹1,470 | ₹1,530 – ₹1,550 |
| 500 units | 100 free + 400 telescopic | ₹2,522 | ₹2,580 – ₹2,600 |
These are illustrative energy-charge figures using the slabs in Section 6. For your exact bill including fixed charge and current fuel surcharge, use the calculator at the top of this page.
TANGEDCO/TNPDCL Residential Latest Tariff Rates 2025-2026
| Monthly Consumption | Rate (₹/unit) |
|---|---|
| 0 – 100 units | Free (₹0) |
| 101 – 200 units | ₹4.70 |
| 201 – 300 units | ₹6.30 |
| 301 – 400 units | ₹8.40 |
| Above 400 units | ₹11.55 |
Note: Rates per TNERC Tariff Order No. 6 of 2025 (LT-IA Domestic), effective 1 July 2025. Tamil Nadu bills domestically on a bi-monthly, telescopic basis with a two-tier free-units scheme (200 free units up to 500 units/bi-month; 100 free above that); figures above are shown per month for convenience. Domestic consumers in Tamil Nadu are largely exempt from electricity tax. A variable Fuel & Power Purchase Cost Adjustment / FSA is revised quarterly by TNERC. Source: Tamil Nadu Electricity Regulatory Commission (TNERC) / TNPDCL.
These are the exact rates the TNEB electricity bill calculator applies to your entered units.
What is Included in Your TNEB / TANGEDCO Electricity Bill?
Every component the TNEB electricity bill calculator factors into your estimate is explained below.
| Charge Component | Explanation |
Free Units | The first 100 units/month (200 per bi-month) are free for Tier-1 households (≤500 units/bi-month). |
|---|---|
| Energy Charges | Your units billed slab-by-slab at the telescopic rates above (lower slabs keep their lower rate). |
| Fixed Charges | A small monthly fixed charge based on connected load. |
| Fuel Surcharge | A variable per-unit adjustment revised quarterly by TNERC. |
| Electricity Tax | Electricity Tax | Domestic (LT-1A) consumers in Tamil Nadu are largely exempt. A 5% tax applies only to commercial, industrial, and HT categories. |
| Meter Rent | A nominal monthly rental charge for the energy meter installed at your premises by TANGEDCO. |
| Delayed Payment Surcharge | 1.5% per month surcharge applied if bill is not paid by the due date mentioned on your bill. |
Common Mistakes TNEB Consumers Make
Users of this TNEB electricity bill calculator most often get tripped up by these five issues.
- Comparing a bi-monthly bill to a monthly one: TANGEDCO/TNPDCL bills residential consumers every two months. A ₹1,700 bi-monthly bill is not “double” a normal month — divide by two for a monthly-equivalent comparison.
- Missing the 500-unit free-quota cliff: crossing 500 units in a bi-monthly cycle drops your free quota from 200 to 100 units and pushes remaining units into higher slabs. A small overage can cost more than expected.
- Ignoring the fuel surcharge (FSA): this is revised quarterly and isn’t part of the base slab rate — it’s a real, variable add-on shown separately on your bill.
- Assuming commercial/industrial connections get the same free units: the free-unit scheme applies only to domestic LT-1A connections.
- Not checking the connected load: fixed charges scale with sanctioned load in kW, so two households using identical units but different load can see different totals.
TNEB / TNPDCL Online Bill Payment Guide
You can pay your TANGEDCO/TNPDCL electricity bill through any of these official channels:
1. TNPDCL consumer self-service portal (tnebnet.org) — log in with your Service Connection Number and Region Code, view your current bill, and pay via card, net banking, or UPI.
2. TANGEDCO/TNPDCL mobile app (Android/iOS) — log in with your registered mobile number, tap Pay Bill, and complete payment.
3. UPI apps (Google Pay, PhonePe, Paytm, BHIM) — select “Electricity”, choose Tamil Nadu Electricity Board / TANGEDCO as the biller, enter your Service Number, and pay.
4. Net banking or BBPS (Bharat Bill Payment System) through most major Indian banks.
To check payment status: open the portal’s Bill Status page, enter your Service Number and Region Code, and view your last payment record. Keep the payment receipt/reference number for any billing dispute.
Once you’ve paid, re-run the TNEB electricity bill calculator next cycle to track any tariff changes.
Tips to Reduce Your Tamil Nadu Electricity Bill
Small changes in usage can meaningfully shift what the TNEB electricity bill calculator estimates for you.
1. Tamil Nadu provides the first 100 units FREE every month to residential consumers (200 per bi-month) — plan consumption to stay close to this threshold.
2. Use energy-efficient BEE 5-star rated fans, refrigerators, and ACs — they can cut consumption by 30–40%.
3. Shift heavy loads like washing machines and water heaters to off-peak hours (10 PM – 6 AM).
4. Apply for PM Surya Ghar Muft Bijli Yojana — get up to ₹78,000 subsidy on rooftop solar installation.
5. Fix meter faults immediately — a faulty meter can lead to estimated billing, often higher than actual consumption.
6. Watch the 500-unit bi-monthly threshold (see Common Mistakes above) — a small reduction can keep you in the higher free-unit tier.
Run your numbers through this TNEB electricity bill calculator after any change to see the real impact on your bill.
Frequently Asked Questions — TNEB Electricity Bill
Have more questions about this TNEB electricity bill calculator? Find quick answers below.
Q1: How is a TNEB / TANGEDCO domestic bill calculated?
Ans: Tamil Nadu uses a bi-monthly, telescopic LT-IA tariff. Each slab rate applies only to the units within that band. Tier-1 households (up to 500 units per bi-month) receive 200 free units; above that, 100 units are free. Remaining units are charged at progressively higher rates, plus a variable FSA. The calculator above presents the equivalent monthly figures.
Q2: What are the current TNEB domestic rates?
Ans: On a monthly-equivalent basis: 0–100 units free, 101–200 at ₹4.70, 201–300 at ₹6.30, 301–400 at ₹8.40, and above 400 at ₹11.55 per unit, as approved by TNERC effective 1 July 2025.
Q3: How many free units do I get in Tamil Nadu?
Ans: Domestic consumers using up to 500 units per bi-month (about 250/month) get 200 free units per bi-month — roughly 100 free units a month. Households crossing 500 units per bi-month get a reduced 100-unit free quota.
Q4: Why does my bill jump sharply after a certain point?
Ans: Because the tariff is telescopic and the free-unit quota drops once bi-monthly consumption crosses 500 units, while the higher slabs (₹8.40 and ₹11.55) also begin to apply. Staying under 500 units per bi-month keeps you in the lower-cost, higher-subsidy tier.
Q5: Does TANGEDCO charge electricity tax on domestic bills?
Ans: Domestic consumers in Tamil Nadu are largely exempt from electricity tax. A variable FSA, revised quarterly by TNERC, does apply on top of energy charges.
Q6: How do I pay my TNEB bill?
Ans: Pay online through the TNPDCL consumer portal at tnebnet.org using your Service Connection Number, through the TANGEDCO/TNPDCL mobile app, or via UPI apps. For complaints, call the 24×7 helpline 1912 or the SMS/WhatsApp number 94987 94987.
Q7: Is TANGEDCO the same as TNPDCL?
Ans: TNPDCL (Tamil Nadu Power Distribution Corporation Limited) is TANGEDCO’s distribution business under its 2024 renamed structure. Billing rules and tariffs are unchanged — only the corporate name and official website changed.
Q8: What happens if I don’t pay my TNEB bill on time?
Ans: A delayed payment surcharge of 1.5% per month applies after the due date shown on your bill. Continued non-payment can lead to disconnection after a grace period specified in your bill.
Q9: Does this calculator work for bi-monthly bills directly?
Ans: Yes — select “Bi-monthly” as the billing period in the calculator and enter your full two-month units for an accurate estimate using the correct 200/100-unit free-quota rule.
Q10: Is the fuel surcharge (FSA) included in this calculator?
Ans: The calculator includes energy charges, fixed charges, and meter rent. The FSA is variable and revised quarterly by TNERC; check your latest bill for the current per-unit FSA rate to add manually if needed.
Q11: Do commercial and industrial connections get free units too?
Ans: No. The free-unit scheme applies only to domestic (LT-1A) residential connections. Commercial (LT-2) and industrial (LT-3) tariffs are charged from the first unit at different rates.
Q12: How often does TNERC revise TNEB tariff rates?
Ans: TNERC reviews and revises tariff orders periodically, typically at the start of a new control period or financial year. This page is updated whenever a new TNERC order is issued for LT-IA domestic consumers.
About TNEB / TANGEDCO / TNPDCL
This TNEB electricity bill calculator uses the TNERC-approved LT-1A tariff followed across Tamil Nadu. This TNEB electricity bill calculator is reviewed against TNERC’s official published orders, not third-party estimates.
TANGEDCO (Tamil Nadu Generation and Distribution Corporation Limited) was the state-owned utility formed after the 2010 bifurcation of the original Tamil Nadu Electricity Board (TNEB). In 2024, as part of a further state-wide restructuring, TANGEDCO’s distribution business was renamed Tamil Nadu Power Distribution Corporation Limited (TNPDCL); generation moved to Tamil Nadu Power Generation Corporation Limited (TNPGCL), and renewable assets moved to Tamil Nadu Green Energy Corporation Limited (TNGECL). TANTRANSCO continues to manage transmission. TNPDCL serves over 3.3 crore registered consumers across Tamil Nadu, including residential, commercial, industrial, agricultural, and street-lighting categories. The utility is regulated by TNERC (Tamil Nadu Electricity Regulatory Commission).
For more on how electricity is measured and billed in India, see our Smart Meter Guide.
| Field | Detail |
| Current entity | TNPDCL (Tamil Nadu Power Distribution Corporation Limited) — formerly TANGEDCO |
| Consumer portal | tnebnet.org (login with Service Connection Number) |
| Official Info site | www.tnpdcl.org |
| Online Bill Payment (Login) | tnebnet.org/awp/login |
| Quick Pay (No Login Required) | tnebnet.org/qwp/qpay |
| Helpline | 1912 (24×7 toll-free) | 94987 94987 (SMS/WhatsApp complaint number) | 044-2852 0131 (general enquiries) |
| Regulator | TNERC — Tamil Nadu Electricity Regulatory Commission (tnerc.tn.gov.in) |
Data Sources & Verification
Every rate on this page is sourced from TNERC Tariff Order No. 6 of 2025 (LT-IA Domestic), effective 1 July 2025, cross-checked against a sample TNPDCL residential bill before publication. Rates are reviewed quarterly and whenever TNERC issues a new order — see our Methodology and Data Sources pages for how we verify every state calculator, and our Editorial Policy for our accuracy standards. Questions about this page’s accuracy can be sent via our About the Author page. Every figure this TNEB electricity bill calculator displays traces back to the sourcing above.