TNEB Bill Calculator (Tamil Nadu) – 2026

Enter the units on your 2-month bill to see exactly what you pay at today's rates — including the 200 free units from 10 May 2026 and the costly jump just after 500 units.

⚡ TNEB bill at a glance (per 2 months)

200 units in 2 months	₹0
400 units in 2 months	₹940
500 units in 2 months	₹1,570
501 units in 2 months	₹2,048

⚠️ Slab trap: at 501 units the bill jumps by ₹478 for one extra unit — see why ↓

Domestic (LT-IA), per 2-month bill. Current rates, checked 18 Sep 2026. Use the calculator for your exact units.

Calculate your TNEB bill

Current TNEB tariff (2026)

Domestic (LT-IA), per 2-month bill, after the state subsidy.

If you use up to 500 units

0 – 200 units	Free
201 – 400 units	₹4.70
401 – 500 units	₹6.30

If you use more than 500 units

0 – 100 units	Free
101 – 400 units	₹4.70
401 – 500 units	₹6.30
501 – 600 units	₹8.40
601 – 800 units	₹9.45
801 – 1000 units	₹10.50
Above 1000 units	₹11.55

No fixed charge and no electricity tax for homes.

Other states

Delhi (BSES, TPDDL) Karnataka (BESCOM) Maharashtra (MSEB) Gujarat (UGVCL, PGVCL…) Torrent Power (Ahmedabad, Surat) Uttar Pradesh (UPPCL) Rajasthan (JVVNL, AVVNL, JdVVNL)

All states in one calculator → · 1-unit price by state →

💡 What uses your units?

❄️ AC running cost 🧊 Fridge units per month 🔥 Geyser cost 🏠 Whole-home load estimator

TNEB bill for common usage (per 2 months)

Units in one 2-month billing cycle. Highlighted rows are slab traps.

Units	Energy & per-unit charges	Your bill	Per unit
100	₹0.00	₹0	₹0.00
200	₹0.00	₹0	₹0.00
250	₹235.00	₹235	₹0.94
300	₹470.00	₹470	₹1.57
350	₹705.00	₹705	₹2.01
400	₹940.00	₹940	₹2.35
450	₹1,255.00	₹1,255	₹2.79
500	₹1,570.00	₹1,570	₹3.14
501	₹2,048.40	₹2,048	₹4.09
510	₹2,124.00	₹2,124	₹4.16
550	₹2,460.00	₹2,460	₹4.47
600	₹2,880.00	₹2,880	₹4.80
700	₹3,825.00	₹3,825	₹5.46
800	₹4,770.00	₹4,770	₹5.96
900	₹5,820.00	₹5,820	₹6.47
1000	₹6,870.00	₹6,870	₹6.87
1200	₹9,180.00	₹9,180	₹7.65

⚠️ The 500-unit trap in Tamil Nadu

Tamil Nadu uses two different ladders, and which one applies depends on your total for the 2 months. Up to 500 units, the first 200 are free. Cross 500 and you move to the second ladder: only the first 100 units are free, and units 101–200 are charged at ₹4.70.

So 500 units cost ₹1,570, but 501 units cost ₹2,048.40 — one extra unit adds ₹478.40. If your reading is heading past 500, cutting a few units before the meter reading (an AC, geyser or motor for a few days) is worth real money.

Worked example — 400 units in 2 months

Units 1–200 (free)	₹0.00
Units 201–400 × ₹4.70	₹940.00
Total	₹940.00

Meter rent, arrears and late fees are not included. The annual inflation-linked revision due from 1 July 2026 had not been issued when this page was checked.

Frequently Asked Questions

TNEB (TNPDCL) bills homes every 2 months. If you use up to 500 units, units 0–200 are free, 201–400 cost ₹4.70 each and 401–500 cost ₹6.30 each. Above 500 units, only the first 100 are free and higher slabs cost ₹4.70 to ₹11.55 per unit. There is no fixed charge and no electricity tax for homes.

₹1,570 for 500 units in a 2-month cycle: 200 units free, 200 units × ₹4.70 and 100 units × ₹6.30.

Yes. From 10 May 2026 (G.O.(Ms) No. 50), homes that use up to 500 units in a 2-month cycle get the first 200 units free. Homes that use more than 500 units keep the earlier structure, where only the first 100 units are free.

Crossing 500 units moves you to the other rate ladder, where only 100 units are free. 500 units cost ₹1,570 but 501 units cost ₹2,048.40 — ₹478.40 more for a single unit.

₹940 for 400 units in 2 months: the first 200 units are free and the next 200 cost ₹4.70 each.

Sources · checked 18 Sep 2026

An estimate from the published tariff — your electricity company's bill is final. Tariffs usually change every April; this page is updated when they do.