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Tamil Nadu electricity tariff since 2015

A home in Tamil Nadu that uses 200 units a month pays ₹470 today. The TNERC tariff for the same use is ₹990; the Government subsidy pays the difference. This page shows every tariff order since 2015, with the official source for each figure.

  • 8 tariff periods since December 2014
  • Each figure from an official order
  • Checked 16 Oct 2026

The bill over ten years

Tariff, 200 units a month₹830 → ₹9902015-16 to 2026-27: +19%. After inflation: −27%.
What a home pays, 200 units a month₹415 → ₹47023 May 2016 to today. The figures include the Government subsidy.
Prices in general+63%Consumer price index (MoSPI), FY 2015-16 to FY 2026-27.
Bill for one month: energy, fixed and customer charges, without electricity duty or fuel surcharge. Tamil Nadu bills every two months; we show half of the two-month bill. Each step is a new tariff order. Tap or point at the chart for the figures.

Tariff and what a home pays

200 units a month. The shaded gap is what the Government subsidy pays. Where no official document states what homes paid, the line has a gap.

How TNPDCL bills 200 units, then and now

Tariff in 2015-16₹830 a month
100 units₹3.50100 units₹4.60

100 units at ₹3.50 = ₹350, 100 units at ₹4.60 = ₹460; fixed and other charges ₹20

Tariff today₹990 a month
200 units₹4.95

200 units at ₹4.95 = ₹990; no fixed charge

What a home pays today₹470 a month
100 unitsfree100 units₹4.70

100 units free, 100 units at ₹4.70 = ₹470; no fixed charge

200 units a month (400 units in a two-month bill). Each piece is one slab: its units and its rate.

Every tariff order since 2015

  1. The TNERC tariff of December 2014. The State paid a subsidy for each unit, but no order states what homes paid.TNERC SMT Order No. 9 of 2014 (Suo-motu determination of tariff for generation and distribution), PDF pp. 282-283 (printed 281-282)
  3. TNERC cut the tariff: for example, Rs 3.00 to Rs 2.50 a unit for the first 100 units. What homes paid did not change.TNERC Order in T.P. No. 1 of 2017 (Determination of tariff for generation and distribution), PDF pp. 328-329 (para 6.2.2); Table 5-4 at p. 278
  4. The first tariff rise since 2014. TNERC removed the fixed charge. Homes pay Rs 2.25 a unit for units 101 to 200.TNERC Order No. 07 of 2022 in T.P. No. 1 of 2022 (corrigendum-updated version as on 20-09-2022), PDF p. 269 (para 6.2.2)
  5. A yearly rise of 2.18%, linked to the price index. The State paid it for homes, so what homes paid did not change.TNERC Suo-motu T.O. No. 6 of 2023 (Determination of tariff for distribution FY 2023-24), PDF p. 32 (para 3.2.2)
  6. A yearly rise of 4.83%. The State raised its subsidy by 4.83% only, so what homes paid also rose: Rs 2.25 to Rs 2.35.TNERC Suo-motu T.O. No. 6 of 2024 (Determination of tariff for distribution FY 2024-25), PDF p. 35 (para 3.2.2)
  7. A yearly rise of 3.16%. The State paid it for homes, so what homes paid did not change.TNERC Suo-motu T.O. No. 6 of 2025 (Determination of tariff for distribution FY 2025-26, TNPDCL), PDF p. 34 (para 3.2.2)

The figures

FromOrderTNERC tariff, a monthWhat a home pays, a month
100 units200 units300 units100 units200 units300 units
12 Dec 2014Order No. 9 of 2014₹340₹830₹1,395———
23 May 2016Order No. 9 of 2014 + Order No. 6 of 2016₹340₹830₹1,395₹85₹415₹1,220
11 Aug 2017Order in T.P. No. 1 of 2017₹265▼ 22%₹570▼ 31%₹1,345▼ 4%₹85₹415₹1,220
10 Sep 2022Order No. 07 of 2022 + T.P. No. 1 of 2022₹450▲ 70%₹900▲ 58%₹1,600▲ 19%₹113▲ 32%₹563▲ 36%₹1,375▲ 13%
1 Jul 2023T.O. No. 6 of 2023₹460▲ 2%₹920▲ 2%₹1,635▲ 2%₹113₹563₹1,375
1 Jul 2024T.O. No. 6 of 2024₹480▲ 4%₹960▲ 4%₹1,710▲ 5%₹118▲ 4%₹588▲ 4%₹1,440▲ 5%
1 Jul 2025T.O. No. 6 of 2025₹495▲ 3%₹990▲ 3%₹1,763▲ 3%₹118₹588₹1,440
10 May 2026T.O. No. 6 of 2025 + Order No. 5 of 2026₹495₹990₹1,763₹0▼ 100%₹470▼ 20%₹1,440
  1. 12 Dec 2014Order No. 9 of 2014
    Tariff
    100 u₹340
    200 u₹830
    300 u₹1,395
    Home pays
    100 u—
    200 u—
    300 u—
  2. 23 May 2016Order No. 9 of 2014 + Order No. 6 of 2016
    Tariff
    100 u₹340
    200 u₹830
    300 u₹1,395
    Home pays
    100 u₹85
    200 u₹415
    300 u₹1,220
  3. 11 Aug 2017Order in T.P. No. 1 of 2017
    Tariff
    100 u₹265▼ 22%
    200 u₹570▼ 31%
    300 u₹1,345▼ 4%
    Home pays
    100 u₹85
    200 u₹415
    300 u₹1,220
  4. 10 Sep 2022Order No. 07 of 2022 + T.P. No. 1 of 2022
    Tariff
    100 u₹450▲ 70%
    200 u₹900▲ 58%
    300 u₹1,600▲ 19%
    Home pays
    100 u₹113▲ 32%
    200 u₹563▲ 36%
    300 u₹1,375▲ 13%
  5. 1 Jul 2023T.O. No. 6 of 2023
    Tariff
    100 u₹460▲ 2%
    200 u₹920▲ 2%
    300 u₹1,635▲ 2%
    Home pays
    100 u₹113
    200 u₹563
    300 u₹1,375
  6. 1 Jul 2024T.O. No. 6 of 2024
    Tariff
    100 u₹480▲ 4%
    200 u₹960▲ 4%
    300 u₹1,710▲ 5%
    Home pays
    100 u₹118▲ 4%
    200 u₹588▲ 4%
    300 u₹1,440▲ 5%
  7. 1 Jul 2025T.O. No. 6 of 2025
    Tariff
    100 u₹495▲ 3%
    200 u₹990▲ 3%
    300 u₹1,763▲ 3%
    Home pays
    100 u₹118
    200 u₹588
    300 u₹1,440
  8. 10 May 2026T.O. No. 6 of 2025 + Order No. 5 of 2026
    Tariff
    100 u₹495
    200 u₹990
    300 u₹1,763
    Home pays
    100 u₹0▼ 100%
    200 u₹470▼ 20%
    300 u₹1,440

▲ ▼: change from the period before. “—”: no official document states this figure. Download the data (CSV).

How we work it out

  • One home: urban, single phase, 2 kW. It uses 100, 200 or 300 units a month.
  • The bill is energy charge plus fixed and customer charges, from the tariff in each order. It does not include electricity duty, tax or fuel surcharge.
  • “What a home pays” uses the rates after the Government subsidy, as the subsidy orders state them.
  • “In today’s rupees” uses the consumer price index of MoSPI (all India, general). We use the average of the months of each financial year. For 2026-27 we use April to September.
  • A two-month bill is 2 times these figures. The slabs apply to the units of the whole bill.

Recent changes, with the full order details

The change log since April 2023: tariff, fuel surcharge, schemes and duty.

FY 2026-27
Government scheme

TNERC Order 5 of 2026: Government of Tamil Nadu raises free electricity to 200 units bimonthly for homes using up to 500 units bimonthly

TNERC (subsidy order on G.O.(Ms) No.50 dated 10-05-2026 of the Government of Tamil Nadu) · TNERC Order No. 5 of 2026, dated 26-05-2026 · order dated 26 May 2026

From 10-05-2026 a home using up to 500 units in the two-month bill gets a total of 200 free units (up from 100). Homes above 500 units bimonthly keep the existing structure, which includes 100 free units. The State pays TNPDCL a provisional Rs 1545.14 crore for 10-05-2026 to 31-03-2027. The approved tariff itself is unchanged.

Before

UnitsRs/kWh payable by the consumer (bimonthly units)
1–1000
101–2002.35

Fixed: Nil

After

UnitsRs/kWh payable by the consumer (bimonthly units)
1–1000
101–2000

Fixed: Nil

Applies to homes with bimonthly consumption up to 500 units. Before: units 101-200 bimonthly were payable at Rs 2.35 (approved Rs 4.95 less GoTN subsidy Rs 2.60). After: the extra Rs 2.35 is also paid by the State. Units above 200 bimonthly are billed as in the 2025 tariff (see Order 8 of 2025).

Sources
FY 2026-27
Government scheme

TNERC Order 4 of 2026: provisional tariff subsidy for FY 2026-27 continues free 100 units bimonthly for all homes

TNERC (provisional subsidy order, Government of Tamil Nadu) · TNERC Order No. 4 of 2026, dated 27-04-2026 · order dated 27 April 2026

TNERC recorded the State subsidy for FY 2026-27 (Rs 18,293.60 crore allotted in the Budget Estimate). The listed policy directions keep 100 free units bimonthly for all domestic slabs and the multi-tenement common supply (LT IE) rate from 01-11-2023. No FY 2026-27 CPI tariff revision order appears in the TNERC 2026 tariff-orders list checked on 13-10-2026.

Source
FY 2025-26
Tariff order

TNERC tariff order for FY 2025-26: CPI revision of 3.16%, domestic approved rates up but the State absorbs the increase for homes

TNERC (suo-motu order for TNPDCL) · T.O. No. 6 of 2025 dated 30-06-2025 (effective 01-07-2025); subsidy Order No. 8 of 2025 dated 01-09-2025 · order dated 30 June 2025

Tariffs rose 3.16% (CPI April 2024 to April 2025) from 01-07-2025. For LT IA domestic the Government exempted homes from the hike, so the payable rate stays where it was (for example Rs 2.35 for units 101-200 bimonthly after subsidy). The table is the approved tariff before the Government subsidy.

Before

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.8
401–5006.45
501–6008.55
601–8009.65
801–100010.7
Above 100111.8

Fixed: Nil

After

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.95
401–5006.65
501–6008.8
601–8009.95
801–100011.05
Above 100112.15

Fixed: Nil

Approved tariff is shown. Order 8 of 2025 sets what the home pays: units 0-100 free; units 101-200 Rs 2.35 (up to 250 units a month); units 201-250/month (401-500 bimonthly) Rs 6.30; 251-300 Rs 8.40; 301-400 Rs 9.45; 401-500 Rs 10.50; above 500 Rs 11.55 per kWh (the Government pays Rs 0.25 to Rs 0.60 of each slab).

Sources
Show 3 earlier changes since April 2023
FY 2024-25
Tariff order

TNERC tariff order for FY 2024-25: CPI revision of 4.83%; what homes pay also rises about 4.8%

TNERC (suo-motu order for TANGEDCO) · T.O. No. 6 of 2024 dated 15-07-2024 (effective 01-07-2024); subsidy Order No. 8 of 2024 dated 12-08-2024 · order dated 15 July 2024

Approved domestic rates rose 4.83% from 01-07-2024. The State raised its existing subsidy by 4.83%, not the whole increase, so the rates homes pay also rose from 01-07-2024: for example Rs 2.25 to Rs 2.35 for units 101-200 bimonthly, and Rs 4.50 to Rs 4.70 for the next band (Order 8 of 2024).

Before

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.6
401–5006.15
501–6008.15
601–8009.2
801–100010.2
Above 100111.25

Fixed: Nil

After

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.8
401–5006.45
501–6008.55
601–8009.65
801–100010.7
Above 100111.8

Fixed: Nil

Approved tariff before the Government subsidy. Free first 100 units bimonthly continue. Payable rates from 01-07-2024 (Order 8 of 2024): 2.35, 4.70, 6.30, 8.40, 9.45, 10.50, 11.55 by band.

Sources
FY 2023-24
Other

TNERC order: lower tariff for common facilities of small apartments, billed under new LT IE

TNERC (order on G.O. letter of 30-10-2023) · TNERC order of 31-10-2023 (Reduction of tariff to the Common facilities of small apartments under LT Tariff ID, billed under LT Tariff IE); GoTN Lr.No.8303/C2/2023 dated 30-10-2023 · order dated 31 October 2023

From 01-11-2023 the common-area supply of certain small apartments (residential, up to three floors without lift) is billed under a new LT IE tariff at a lower rate than LT ID. It affects the shared meter of an apartment block, not each flat's own meter. The order PDF is a scan that could not be read, so the rate cut itself is not quoted here.

Sources

Some details were read from a scanned or partly readable copy of the document.

FY 2023-24
Tariff order

TNERC tariff order for FY 2023-24: CPI revision of 2.18%, domestic exempted by the State

TNERC (suo-motu order for TANGEDCO) · T.O. No. 6 of 2023 (effective 01-07-2023); subsidy Order No. 8 of 2023 dated 20-07-2023

A CPI-linked rise of 2.18% (April 2023 against August 2022, because the previous revision was in September 2022) took effect on 01-07-2023. The Government exempted domestic consumers and paid TANGEDCO for the loss, so homes did not pay more.

Before

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.5
401–5006
501–6008
601–8009
801–100010
Above 100111

Fixed: Nil

After

UnitsRs/kWh approved tariff, bimonthly slabs
0–4004.6
401–5006.15
501–6008.15
601–8009.2
801–100010.2
Above 100111.25

Fixed: Nil

Approved tariff before the Government subsidy. Order date of T.O. 6 of 2023 is not printed in the text read; the effective date is 01-07-2023.

Sources

What we could not confirm

  • No official document states what homes paid from December 2014 to May 2016. The orders give only the subsidy for each unit, so we show no figure.
  • One subsidy order of 2022 prints 450 in the row for homes up to 100 units. This is a misprint: the same order gives 100 units free. We use 0, as the 2023 order prints.
  • The order of May 2026 does not print a full table of what homes pay. We use its rule for the 200 free units, and the rates of the 2025 order above 200 units.
  • TNERC had not issued the yearly rise for July 2026 when we checked on 16 October 2026.
  • The orders do not give the electricity tax rate for homes. Our figures do not include it.

Use this data

Cite this page. ebbillcalc.com, “Tamil Nadu electricity tariff history, FY 2015-16 to FY 2026-27”, Sri Murugan Systems, 16 Oct 2026. https://ebbillcalc.com/tamil-nadu-electricity-tariff-changes/

You can copy and use the data and the charts. Give credit to ebbillcalc.com with a link to this page. Licence: CC BY 4.0.

Questions

How much has the electricity tariff gone up in Tamil Nadu since 2015?

For 200 units a month, the TNERC tariff went from ₹830 in 2015-16 to ₹990 in 2026-27, +19%. Prices in general rose +63% in that time, so the tariff fell 27% after inflation.

Why is what a home pays lower than the tariff?

The State pays part of the bill for homes. Homes also get free units: 100 in each two-month bill since 2016, and 200 since May 2026 for homes up to 500 units.

When does TNERC change the tariff?

Since 2022, TNERC can change the tariff on 1 July each year, linked to the price index. The State decides if homes pay the rise.

Are electricity duty and fuel surcharge in these figures?

No. The figures show energy, fixed and customer charges only. Your bill also has electricity duty or tax, and a fuel surcharge in most months.

Sources

More tools

Tamil Nadu bill calculatorHow to read your TNPDCL billTariff history of all statesLatest changes in all states