💡 300 Units Electricity Bill in Tamil Nadu (two months)
TANGEDCO (Tamil Nadu Generation and Distribution Corporation) - current slab rates, 2026
Bill for 300 units every two months
₹470
Average ₹1.57 per unit; your last units cost ₹4.70 each. Includes the automatic state subsidy.
Homes using up to 500 units every two months get the first 200 units free; above 500 units, the first 100 units are free. The government subsidy is already included in the bills shown here.
How the 300-unit bill adds up
| Slab (units per two months) | Units | Rate | Charge |
|---|---|---|---|
| 1-200 | 200 | Free | ₹0 |
| 201-400 | 100 | ₹4.70 | ₹470 |
| Fixed charge | ₹0 | ||
| Total (before electricity duty) | ₹470 | ||
Source: TNERC Order No. 4 of 2026 dated 27 Apr 2026 (Provisional Tariff Subsidy, FY 2026-27, LT-IA payable rates) with Order No. 5 of 2026 dated 26 May 2026 (200 free units). Last verified 2026-11-08. Estimate only; check your latest TNEB bill.
What a little more or less would cost
| Units per two months | Bill | Avg. per unit |
|---|---|---|
| 200 units | ₹0 | Free |
| 250 units | ₹235 | ₹0.94 |
| 300 units (this page) | ₹470 | ₹1.57 |
| 350 units | ₹705 | ₹2.01 |
| 400 units | ₹940 | ₹2.35 |
Cutting back to 200 units would bring the bill down to ₹0, saving ₹470 every two months. Above 400 units the next slab starts and each extra unit costs more. Watch the 500-unit line: at 500 units the bill is ₹1,570, but at 501 units it becomes ₹2,048 because the extra free units stop.
Try your own units (Tamil Nadu, monthly)
TNEB / TNPDCL: TNERC Order No. 4 of 2026 dated 27 Apr 2026 (Provisional Tariff Subsidy, FY 2026-27, LT-IA payable rates) with Order No. 5 of 2026 dated 26 May 2026 (200 free units). Last verified 2026-11-08. Slabs are notified per two months; this calculator converts them to a monthly bill.
Homes using up to 500 units every two months get the first 200 units free; above 500 units, the first 100 units are free. The government subsidy is already included in the bills shown here.
Estimated Monthly Bill
₹247
150 units - Avg ₹1.65/unit
Bill breakdown
Monthly bill
₹247
Quarterly
₹741
Annual estimate
₹2,964
Tips to reduce your bill
- - Switch to 5-star BEE-rated appliances - they use 30-50% less electricity
- - Use LED bulbs (7W LED = 60W incandescent in brightness)
- - Set AC to 24-26 degrees C - each degree below 24 increases consumption ~6%
- - Avoid peak hours (6-10 PM) if your DISCOM has time-of-use tariffs
- - A 1kW solar rooftop panel generates ~100-120 units/month in India
Includes the automatic state subsidy for your usage level. Estimate for a domestic connection. Fuel adjustment charges, electricity duty and other state levies change often and vary by state, so your actual bill can differ. Check your DISCOM website or latest electricity bill for exact rates.
150 units a month: Tamil Nadu vs other states
| 💡 Tamil Nadu | ₹235 |
| 🏙️ Delhi | ₹490 |
| 🔆 Gujarat | ₹550 |
| ⚡ West Bengal | ₹912 |
| ☀️ Rajasthan | ₹988 |
| ⚡ Uttar Pradesh | ₹1,045 |
| 🔌 Karnataka | ₹1,170 |
| ⚡ Maharashtra | ₹1,306 |
Monthly bill for the same usage at each state's current domestic tariff, before electricity duty, fuel adjustment charges and any opt-in subsidy. 300 units every two months is about 150 units a month.
FAQs - 300 units electricity bill in Tamil Nadu
How much is the electricity bill for 300 units in Tamil Nadu?▾
Using 300 units every two months in Tamil Nadu costs about ₹470 at current TNEB rates, including the fixed charge and the state subsidy but before electricity duty.
How is the 300-unit bill calculated?▾
Slabs are charged one band at a time: 200 units at Free = ₹0, 100 units at ₹4.70 = ₹470. Then the fixed charge of ₹0 is added, for a total of ₹470.
What is the per unit cost at 300 units in Tamil Nadu?▾
At 300 units the average works out to ₹1.57 per unit including the fixed charge, while your last units are charged at ₹4.70 per unit. The average rises as usage moves into higher slabs.
How much more does it cost to use 50 more units?▾
Going from 300 to 350 units raises the bill from ₹470 to ₹705, an extra ₹235.
What happens if I use more than 500 units every two months?▾
Homes using up to 500 units every two months get the first 200 units free; above 500 units, the first 100 units are free. The government subsidy is already included in the bills shown here. At exactly 500 units the bill is ₹1,570; at 501 units it jumps to ₹2,048, so staying at or under 500 units saves ₹478.
Which charges are not included in this 300-unit bill?▾
Electricity duty and state taxes are not included, and neither are fuel or power purchase adjustment charges that change every quarter. Your actual bill can be somewhat higher than the figure shown here.
Is a 300-unit bill cheaper in other states?▾
For the same 150 units a month, the bill ranges from ₹235 in Tamil Nadu to ₹1,306 in Maharashtra across the states we cover, because each state sets its own slabs, fixed charges and subsidies.