Power · large-load tariffs
24 states have approved large-load power tariffs for data centers
30 tariffs and rules are approved, and 14 more are filed and waiting for a decision.
Each row is a utility’s schedule or a state rule for very large new loads such as data centers, filed or decided from Jan 2024 to Oct 2026, as the regulator or the utility states it.
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Where a data-center tariff or rule is approved, filed or absent
every stateMontana, North Dakota, South Dakota, Colorado, Delaware and Oklahoma have only filings.
- AK
- ME
- WI 2
- VT
- NH
- WA
- ID
- MT 1
- ND 1
- MN 1
- IL 1
- MI 2
- NY
- MA
- OR 3
- NV
- WY
- SD 1
- IA
- IN 1
- OH 2
- PA 2
- NJ
- CT
- RI
- CA 1
- UT 1
- CO 1
- NE
- MO 3
- KY 6
- WV 1
- VA 2
- MD
- DE 1
- AZ 2
- NM
- KS 1
- AR
- TN 1
- NC 2
- SC 1
- DC
- OK 1
- LA
- MS 1
- AL 1
- GA 2
- HI
- TX 3
- FL 2
14 of 16 minimum bills charge for at least 80% of reserved power
approved tariffs and rules · stated values only- 70% 1
- 75% 1
- 80% 12
- 90% 2
16 of 30 approved state it
- 5 yr 1
- 10 yr 2
- 12 yr 6
- 14 yr 1
- 15 yr 6
- 20 yr 2
18 of 30 approved state it
- 15 MW 1
- 20 MW 2
- 25 MW 3
- 40 MW 1
- 50 MW 6
- 70 MW 1
- 75 MW 4
- 100 MW 5
- 150 MW 1
24 of 30 approved state it
Contracts run 15 years or longer in 8 of 18 tariffs. Each large-load tariff sets its own mix: most also charge an exit fee and ask for collateral, and some admit only loads with a high load factor; the register shows which.
48% of US AI capacity sits where a large-load tariff applies
the sites- Approved tariff 7.3 GW · 48%
- Tariff filed only 0.2 GW · 1%
- No tariff found 7.8 GW · 51%
Matched through the utilities that EIA lists for each county; a county with several utilities counts when any one has a tariff. State rules and TVA’s wholesale rate are not matched to a site.
Every tariff and rule
tariffs.csv| Date | Tariff | Status | Threshold | Minimum bill | Term | Exit fee · collateral | Sources |
|---|---|---|---|---|---|---|---|
| Oct 2026 filed | Duke Energy Carolinas and Duke Energy Progress · Large Load Tariff (service under Schedule HLF) NC · North Carolina Utilities Commission · E-7, Sub 1329; E-2, Sub 1380 Duke Energy and the NC Public Staff filed a settlement on a Large Load Tariff for loads of 50 MW or more with a high load factor; below 100 MW the minimum term is 10 years, and billing demand is at least 75% of contract demand. | Filed | 50 MW | 75% | 10 yr | yes · yes | Duke Energy, 7 October 2026 · news.duke-energy.comDuke Energy Carolinas and Duke Energy Progress (filing posted by SELC), 6 October 2026 · selc.org |
| Sep 2026 decided | ERCOT transmission and distribution service providers · 16 TAC §25.194 Large Load Interconnection Standards TX · Public Utility Commission of Texas · Project No. 58481 · state rule The PUCT adopted a rule under SB 6 that makes new ERCOT loads of 75 MW or more post financial security of $50,000 per MW and sets the consequences of withdrawing requested demand. The decided date is the filing date of the adoption order. | Approved | 75 MW | not stated | not stated | not stated · yes | Public Utility Commission of Texas, 18 September 2026 · interchange.puc.texas.gov |
| Sep 2026 filed | The Empire District Electric Company d/b/a Liberty · Transmission Service Large Load (TS-LL) tariff MO · Missouri Public Service Commission · ET-2026-0184 Liberty filed a proposed Transmission Service Large Load tariff with the Missouri PSC and asks for an order by January 31, 2027; the press release does not give the size threshold. | Filed | not stated | not stated | not stated | not stated · not stated | Missouri Public Service Commission, 17 September 2026 · psc.mo.gov |
| Aug 2026 decided | Indiana Michigan Power (I&M) · Tariff LP (Large Power) Large Load Customer terms MI · Michigan Public Service Commission · U-21986 Michigan Large Load Customers of 50 MW or more sign an initial term of at least 15 years after a ramp of up to 5 years, are billed at least 90% of contract capacity, give collateral of 50% of the exit fee, and pay an exit fee to leave early. | Approved | 50 MW | 90% | 15 yr ramp up to 5 yr | yes · yes | Indiana Michigan Power, 18 September 2026 · indianamichiganpower.com |
| Aug 2026 decided | Tennessee Valley Authority · Data center rate (wholesale rate structure change) TN, AL, MS, KY, GA, NC, VA · TVA Board of Directors The TVA Board created a new data center rate as part of changes to its wholesale rate structure; the release does not give the size threshold or contract terms. | Approved | not stated | not stated | not stated | not stated · not stated | Tennessee Valley Authority, 20 August 2026 · s205.q4cdn.com |
| Aug 2026 as of | Xcel Energy (Public Service Company of Colorado) · Large Load Tariff CO · Colorado Public Utilities Commission · 26AL-0137E Xcel Energy asked the Colorado PUC to approve a large load tariff that makes customers of 50 MW or more pay for the transmission, substations and new generation needed to serve them. | Filed | 50 MW | not stated | not stated | not stated · not stated | Colorado Department of Regulatory Agencies (PUC Newsletter), 4 August 2026 · content.govdelivery.com |
| Jul 2026 filed | Otter Tail Power Company · Large General Service - Tier III - High Power Compute SD · South Dakota Public Utilities Commission · EL26-021 Otter Tail Power proposed a High Power Compute rate for data center loads of at least 75 MW, a take-or-pay service with a 15-year minimum term after the buildout period, collateral and liquidated damages. | Filed | 75 MW | not stated | 15 yr | yes · yes | Otter Tail Power Company, 27 July 2026 · puc.sd.govOtter Tail Power Company, 27 July 2026 · puc.sd.gov |
| Jul 2026 filed | AES Ohio (The Dayton Power and Light Company) · Data Center Tariff (in rate-plan settlement) OH · Public Utilities Commission of Ohio · 25-958-EL-AIR AES Ohio filed an unopposed rate-plan settlement that includes a new Data Center Tariff; it is pending before the PUCO. | Filed | not stated | not stated | not stated | not stated · not stated | AES Ohio, 21 July 2026 · aes-ohio.com |
| Jun 2026 filed | Xcel Energy (Northern States Power Company-Wisconsin) · Large Load Customer General Time of Day Service Tariff WI · Public Service Commission of Wisconsin · 4220-TE-119 Proposed tariff for new loads of 100 MW or more with 15-year commitments, financial security, minimum monthly payments, and exit fees; pending before the Wisconsin PSC. | Filed | 100 MW | not stated | 15 yr | yes · yes | Xcel Energy, 22 June 2026 · wpr.orgPublic Service Commission of Wisconsin · apps.psc.wi.gov |
| Jun 2026 filed | OG&E · Proposed large-load tariff OK · Oklahoma Corporation Commission OG&E filed a large-load tariff with the OCC for new loads of 75 MW or more, with a 15-year term, a ramp of up to five years, minimum bills and collateral. | Filed | 75 MW | not stated | 15 yr ramp up to 5 yr | yes · yes | OG&E, 18 June 2026 · oge.com |
| Jun 2026 filed | Otter Tail Power Company · Large General Service - Tier III - High Power Compute ND · North Dakota Public Service Commission · PU-26-215 Otter Tail Power proposed a High Power Compute rate for data center loads of at least 75 MW, a take-or-pay service with a 15-year minimum term after the buildout period, collateral and liquidated damages. | Filed | 75 MW | not stated | 15 yr | yes · yes | Otter Tail Power Company, 18 June 2026 · psc.nd.gov |
| Jun 2026 decided | PPL Electric Utilities Corporation · Rate Schedule LP-6 Large Load Interconnections PA · Pennsylvania Public Utility Commission · R-2025-3057164 Data center customers of 50 MW or more sign an agreement of at least 10 years with a ramp of up to 5 years, pay on at least 80% of their ramp-schedule load, post security equal to upgrade costs, and owe an exit fee. | Approved | 50 MW | 80% | 10 yr ramp up to 5 yr | yes · yes | PPL Electric Utilities, 30 June 2026 · pplelectric.comPennsylvania Public Utility Commission, 4 June 2026 · puc.pa.gov |
| May 2026 decided | Xcel Energy (Northern States Power Company - Minnesota) · Very large customer tariff framework and customer class MN · Minnesota Public Utilities Commission · 25-289 A new very large customer class for new loads of 100 MW or more, with a 15-year default contract, a 24-month exit notice, and a minimum bill and exit fee set at 80% of contracted capacity. | Approved | 100 MW | 80% | 15 yr | yes · not stated | Minnesota Public Utilities Commission, 18 May 2026 · content.govdelivery.com |
| May 2026 decided | Portland General Electric Company · Schedule 96 (large load data center class) OR · Public Utility Commission of Oregon · UM 2377 The Oregon PUC created Schedule 96 for PGE data centers, with minimum generation and transmission demand charges at 90 percent of contracted capacity, contract terms from 10 to 30 years by size, exit fees and collateral rules. | Approved | 20 MW | 90% | 10 yr | yes · yes | Public Utility Commission of Oregon, 7 May 2026 · apps.puc.state.or.usPublic Utility Commission of Oregon · oregon.gov |
| Apr 2026 decided | Pennsylvania electric distribution companies (model tariff) · Model Tariff for Customers at or over 50 MW Individually or 100 MW in the Aggregate (Large Load Customer) PA · Pennsylvania Public Utility Commission · M-2025-3054271 · state rule A statewide model tariff (guidance, not a utility schedule) for loads of 50 MW or 100 MW aggregated: initial term of at least 5 years after a 3-to-5-year ramp, 80% minimum demand charge, collateral to cover upgrade costs, and an exit fee. | Approved | 50 MW | 80% | 5 yr ramp up to 5 yr | yes · yes | Pennsylvania Public Utility Commission, 30 April 2026 · puc.pa.govPennsylvania Public Utility Commission, 12 May 2026 · puc.pa.gov |
| Apr 2026 decided | We Energies (Wisconsin Electric Power Company) · Very Large Customer (VLC) and Bespoke Resources Tariffs WI · Public Service Commission of Wisconsin · 6630-TE-113 The Commission approved a modified Very Large Customer tariff for loads of 100 MW or more with a minimum initial term of 15 years and a requirement that these customers pay 100% of their resource costs. | Approved | 100 MW | not stated | 15 yr | not stated · not stated | Public Service Commission of Wisconsin, 24 April 2026 · psc.wi.gov |
| Apr 2026 filed | Duke Energy Florida, LLC · Large Load Customer Policy (LLCP) and Large Load Customer Agreement (LLCA) FL · Florida Public Service Commission · 20260064-EI Duke Energy Florida filed a Large Load Customer Policy for loads of 50 MW or more with a 20-year term and a minimum demand of 75% to 85% of contract capacity; the case is pending. | Filed | 50 MW | not stated | 20 yr | yes · yes | Duke Energy Florida, LLC, 22 April 2026 · psc.state.fl.usFlorida Public Service Commission, 28 July 2026 · psc.state.fl.us |
| Apr 2026 filed | El Paso Electric Company · Schedule No. 27 - High Load Factor Large Power Service Rate (HLFLP) TX · Public Utility Commission of Texas · 59611 El Paso Electric asked the PUCT to approve Schedule 27 for data center and advanced manufacturing loads of 75 MW or more, with a 20-year minimum term that includes the load ramp, security and termination damages. | Filed | 75 MW | not stated | 20 yr | yes · yes | El Paso Electric Company, 7 April 2026 · interchange.puc.texas.gov |
| Mar 2026 filed | NorthWestern Energy (NorthWestern Corporation) · Large New Load Tariff MT · Montana Public Service Commission NorthWestern Energy asked the Montana PSC to approve a Large New Load Tariff for new or expanded loads of 5 MW or more, with collateral and termination costs. | Filed | 5 MW | not stated | not stated | yes · yes | NorthWestern Energy, 31 March 2026 · northwesternenergy.com |
| Mar 2026 as of | ComEd (Commonwealth Edison Company) · Large load tariff changes adding deposit protection (Large Demand Project Applicants or Customers) IL · Illinois Commerce Commission · 25-0677/25-0679 (consolidated) The ICC approved ComEd tariff changes that add deposit protection if a large demand project such as a data center is canceled or abandoned, and the ICC must open an investigation of a large-load tariff. | Approved | ICC describes the requests as 50 MW or more; the tariff threshold itself is not stated in the press release | not stated | not stated | not stated · yes | Illinois Commerce Commission, 20 March 2026 · icc.illinois.gov |
| Feb 2026 decided | Kentucky Utilities Company (KU) · Extremely High Load Factor (Rate EHLF) KY · Kentucky Public Service Commission · 2025-00113 New customers above 50 MVA with very high load factor sign an initial contract of at least 15 years, are billed at least 80% of contract capacity, give collateral, and pay an exit fee to leave early. | Approved | Contract capacity greater than 50 MVA (reduced from 100 MVA); new customers only; threshold is in MVA, not MW | 80% | 15 yr | yes · yes | Kentucky Public Service Commission, 16 February 2026 · psc.ky.govKentucky Public Service Commission · psc.ky.gov |
| Feb 2026 decided | Louisville Gas and Electric Company (LG&E) · Extremely High Load Factor (Rate EHLF) KY · Kentucky Public Service Commission · 2025-00114 New LG&E customers above 50 MVA with very high load factor sign an initial contract of at least 15 years, are billed at least 80% of contract capacity, give collateral, and pay an exit fee to leave early. | Approved | Capacity greater than 50 MVA (reduced from 100 MVA); new customers only; threshold is in MVA, not MW | 80% | 15 yr | yes · yes | Kentucky Public Service Commission, 16 February 2026 · psc.ky.govKentucky Public Service Commission · psc.ky.gov |
| Jan 2026 decided | Florida Power & Light Company · Large Load Contract Service (LLCS-1, LLCS-2 and LLCS Service Agreement) FL · Florida Public Service Commission · 20250011-EI The Florida PSC approved the FPL 2025 rate settlement, which includes the LLCS-1 and LLCS-2 large load rate schedules for new loads of 50 MW or more with a 70% take-or-pay demand charge. | Approved | 50 MW | 70% | 20 yr | yes · yes | Florida Public Service Commission staff, 14 November 2025 · psc.state.fl.usFlorida Power & Light Company, 13 February 2026 · psc.state.fl.usFlorida Power & Light Company, 10 November 2025 · psc.state.fl.us |
| Jan 2026 decided | Rocky Mountain Power (PacifiCorp) and other qualified electric utilities · R746-318 Large Scale Electric Requirements UT · Public Service Commission of Utah · 25-R318-01 · state rule The Utah PSC made rule R746-318 effective on January 1, 2026; it directly assigns interconnection and transmission upgrade costs to large load customers and sets a 60-day review of large load contracts. | Approved | applies to large load customers as defined in Utah Code 54-26-101; no MW figure in the rule text | not stated | not stated | not stated · not stated | Public Service Commission of Utah, 15 January 2026 · pscdocs.utah.govPublic Service Commission of Utah, 31 October 2025 · pscdocs.utah.gov |
| Dec 2025 filed | Delmarva Power & Light Company · Large load tariff (proposed revised tariff pages) DE · Delaware Public Service Commission · 25-0826 Delmarva filed a proposed large load tariff on Commission order for customers of 25 MW or more; the case is pending before the Delaware PSC. | Filed | 25 MW | not stated | not stated | not stated · not stated | Delaware Public Service Commission · depsc.delaware.gov |
| Nov 2025 decided | Dominion Energy Virginia (Virginia Electric and Power Company) · Rate Schedule GS-5 VA · Virginia State Corporation Commission · PUR-2025-00058 A new GS-5 class, from January 1, 2027, for customers of 25 MW or more at 75% load factor, with a 14-year contract that includes a ramp of up to 4 years, minimum charges of 85% for distribution and transmission and 60% for generation, collateral, and an exit fee. | Approved | 25 MW | not stated | 14 yr ramp up to 4 yr | yes · yes | Virginia State Corporation Commission, 25 November 2025 · scc.virginia.govVirginia State Corporation Commission, 25 November 2025 · npr.brightspotcdn.com |
| Nov 2025 decided | Ameren Missouri · Large Load Customer Service (Schedule LLCS) MO · Missouri Public Service Commission · ET-2025-0184 The Missouri PSC approved the Ameren Missouri large load rate plan (Schedule LLCS) for loads of 75 MW or more; the compliance tariff became effective on January 4, 2026. | Approved | 75 MW | 80% | 12 yr ramp up to 5 yr | yes · yes | Ameren Missouri, 24 November 2025 · ameren.mediaroom.comAmeren Missouri and signatories · efis.psc.mo.govAmeren Missouri, 14 May 2025 · efis.psc.mo.govMissouri Public Service Commission, 8 December 2025 · efis.psc.mo.govMissouri Public Service Commission, 19 December 2025 · efis.psc.mo.gov |
| Nov 2025 decided | Evergy Missouri Metro and Evergy Missouri West · Large Load Power Service (Schedule LLPS) MO · Missouri Public Service Commission · EO-2025-0154 The Missouri PSC approved a non-unanimous settlement and authorized Evergy LLPS schedules for new or expanded loads of 75 MW; the compliance tariffs became effective on March 9, 2026. | Approved | 75 MW | 80% | 12 yr ramp up to 5 yr | yes · yes | Missouri Public Service Commission, 13 November 2025 · efis.psc.mo.govMissouri Public Service Commission, 25 February 2026 · efis.psc.mo.gov |
| Nov 2025 decided | Consumers Energy · Rate GPD data center (large load) provision MI · Michigan Public Service Commission · U-21859 Data centers and other customers of 100 MW or more sign a contract of at least 15 years with a minimum billing demand of 80% paid whether used or not, may ramp over up to 5 years, and must give collateral and pay an exit fee to leave early. | Approved | 100 MW | 80% | 15 yr ramp up to 5 yr | yes · yes | Michigan Public Service Commission, 6 November 2025 · michigan.gov |
| Nov 2025 decided | Evergy Kansas Central · Large Load Power Service (Schedule LLPS) KS · Kansas Corporation Commission · 25-EKME-315-TAR The KCC approved a settlement that sets a Large Load Power Service rate for new or expanded loads of 75 MW or more, with a 12-year term plus an optional ramp of up to 5 years. | Approved | 75 MW | 80% | 12 yr ramp up to 5 yr | yes · yes | Kansas Corporation Commission, 6 November 2025 · kcc.ks.govEvergy Kansas Central, 6 November 2025 · evergy.com |
| Oct 2025 decided | East Kentucky Power Cooperative (with its owner-member cooperatives) · Data Center Power Tariff (Rate DCP) KY · Kentucky Public Service Commission · 2025-00140 Data centers of 15 MW or more at 60% load factor take service under Rate DCP through a Commission-approved special contract and must keep a prepayment deposit of two months of expected bills. | Approved | 15 MW | not stated | not stated | not stated · yes | Kentucky Public Service Commission, 30 October 2025 · psc.ky.govKentucky Public Service Commission · psc.ky.gov |
| Oct 2025 decided | Duke Energy Kentucky · Financial assurance and minimum demand terms for high-volume Rate DT and Rate TT customers KY · Kentucky Public Service Commission · 2024-00354 New Rate DT and TT customers of 40 MW or more sign a service agreement with a minimum demand of 75% of their specified load and may have to give financial and credit assurance. | Approved | 40 MW | 75% | not stated | not stated · not stated | Kentucky Public Service Commission, 2 October 2025 · psc.ky.govKentucky Public Service Commission · psc.ky.gov |
| Oct 2025 filed | PacifiCorp, d/b/a Pacific Power · Schedule 401 - Service to New Large Energy Use Facilities OR · Public Utility Commission of Oregon · UE 463 (Advice 25-015) Pacific Power proposed Schedule 401, a new class for data centers of 20 MW or more with a contract of 10 years or more; the Oregon PUC has not decided it. | Filed | 20 MW | not stated | 10 yr | not stated · not stated | PacifiCorp (Pacific Power), 2 October 2025 · edocs.puc.state.or.usPublic Utility Commission of Oregon · oregon.gov |
| Aug 2025 decided | Appalachian Power Company and Wheeling Power Company · Schedule L.C.P. (Large Capacity Power Service) Large Load Customers provisions WV · Public Service Commission of West Virginia · 24-0854-E-42T New loads of 100 MW at one site (or 150 MW aggregated) sign an initial term of at least 12 years after a ramp of up to 5 years, are billed at least 80% of contract capacity, give collateral, and pay an exit fee to leave early. | Approved | 100 MW | 80% | 12 yr ramp up to 5 yr | yes · yes | Appalachian Power · appalachianpower.com |
| Jul 2025 decided | El Paso Electric Company · Rate Schedule No. 33A - Large Economic Development Service Rate TX · Public Utility Commission of Texas · 56903 The PUCT approved El Paso Electric's Schedule 33A, an economic development rate for data center customers above 50,000 kW. | Approved | 50 MW | not stated | not stated | not stated · not stated | Public Utility Commission of Texas, 31 July 2025 · interchange.puc.texas.govEl Paso Electric Company, 7 April 2026 · interchange.puc.texas.govEl Paso Electric Company · epelectric.com |
| Jul 2025 decided | Pacific Gas and Electric Company · Electric Rule 30 - Transmission-Level Retail Electric Service (interim) CA · California Public Utilities Commission · A.24-11-007 The CPUC approved an interim Electric Rule 30 for PG&E customers that take retail service at transmission level, such as AI data centers. | Approved | transmission-level customers at 50-230 kV; no MW threshold stated | not stated | not stated | not stated · not stated | California Public Utilities Commission, 24 July 2025 · docs.cpuc.ca.govCalifornia Public Utilities Commission, 24 July 2025 · docs.cpuc.ca.gov |
| Jul 2025 decided | AEP Ohio (Ohio Power Company) · Data Center Tariff (Schedule DCT) OH · Public Utilities Commission of Ohio · 24-508-EL-ATA New data center customers of 25 MW or more pay a minimum demand that rises with their size and cannot exceed 85% of contract capacity, over a 12-year term that includes a 4-year ramp; they give collateral and pay an exit fee to leave early. | Approved | 25 MW | not stated | 12 yr ramp up to 4 yr | yes · yes | AEP Ohio · aepohio.comAmerican Electric Power, 9 July 2025 · aep.comPublic Utilities Commission of Ohio, 9 July 2025 · dam.assets.ohio.gov |
| Jun 2025 filed | Arizona Public Service Company · Extra High Load Factor Rate Schedule XHLF (proposed changes) AZ · Arizona Corporation Commission · E-01345A-25-0105 In its 2025 rate case, APS proposed to make data centers take service on its XHLF rate; the Arizona Corporation Commission has not voted. | Filed | all data centers under the proposal; the current optional rate starts at 5,000 kW | not stated | not stated | not stated · not stated | Arizona Public Service Company, 13 June 2025 · s22.q4cdn.comArizona Corporation Commission, 10 July 2026 · azcc.govArizona Public Service Company · aps.com |
| Apr 2025 decided | South Carolina Public Service Authority (Santee Cooper) · Experimental Large Load Service Schedule L-25-LL SC · Santee Cooper Board of Directors Santee Cooper adopted an experimental large load schedule for data centers above 50 MW, with no contract demand reduction before 15 years of service. | Approved | 50 MW | not stated | not stated | not stated · not stated | Santee Cooper, 25 April 2025 · santeecooper.com |
| Mar 2025 decided | Kentucky Power Company · Industrial General Service Tariff (Tariff I.G.S.) large-load provisions KY · Kentucky Public Service Commission · 2024-00305 Customers adding 150 MW or more sign a 20-year contract, are billed at least 90% of their highest established demand, give collateral of 24 months of non-fuel bills, and pay five years of minimum bills if they close early. | Approved | 150 MW | not stated | 20 yr | yes · yes | Kentucky Public Service Commission, 18 March 2025 · psc.ky.govKentucky Public Service Commission · psc.ky.gov |
| Feb 2025 decided | Salt River Project · E-67 Standard Price Plan for Large Load Substation Large General Service AZ · SRP Board of Directors The SRP board approved a revised E-67 price plan that new accounts of 20 MW or more must take, with a minimum billing demand of 80 percent of forecasted demand. | Approved | 20 MW | 80% | not stated | not stated · not stated | Salt River Project · srpnet.comSalt River Project, 27 February 2025 · srpnet.comSalt River Project, 2 December 2024 · srpnet.com |
| Feb 2025 decided | Indiana Michigan Power (I&M) · Tariff I.P. (Industrial Power) Large Load Customer provisions IN · Indiana Utility Regulatory Commission · Cause No. 46097 Large Load Customers of 70 MW or more at one plant sign an initial term of at least 12 years with a ramp of up to 5 years, are billed at least 80% of contract capacity, give collateral and pay an exit fee to leave early. | Approved | 70 MW | 80% | 12 yr ramp up to 5 yr | yes · yes | Indiana Michigan Power · indianamichiganpower.comAmerican Electric Power, 19 February 2025 · aep.comAmerican Electric Power, 22 November 2024 · aep.com |
| Jan 2025 decided | Georgia Power · Revisions to Rules and Regulations for Large Load customers (100 MW or more) GA · Georgia Public Service Commission · 44280 The Georgia PSC approved Georgia Power rule changes that let it apply special terms, longer contracts and minimum bills to new loads above 100 MW, and requires PSC review of each such contract. | Approved | 100 MW | not stated | not stated | not stated · not stated | Georgia Public Service Commission, 23 January 2025 · psc.ga.govGeorgia Public Service Commission Staff and Georgia Power, 26 August 2026 · services.psc.ga.gov |
| Dec 2024 decided | PacifiCorp dba Pacific Power · Capacity reservation charge and excess demand charge for large load customers OR · Public Utility Commission of Oregon · UE 433 In Pacific Power's 2024 rate case, the Oregon PUC adopted a capacity reservation charge and an excess demand charge for customers above 25,000 kW. | Approved | 25 MW | not stated | not stated | not stated · not stated | Public Utility Commission of Oregon, 19 December 2024 · apps.puc.state.or.us |
Not counted · 49 items
- Duke Energy Ohio proposed Data Center Tariff (Rate DC), PUCO Case 26-755-EL-ATA. No readable primary source: PUCO DIS docket pages return a captcha and no Duke release was found; only a PJM consultant whitepaper and EEI summary mention it.
- FirstEnergy Ohio utilities proposed Schedule DCT, PUCO Case 26-697-EL-ATA. No readable primary source: PUCO DIS returns a captcha; PUCO chair testimony says only that the PUCO directed FirstEnergy to propose a tariff, not that it was filed.
- DTE Electric proposed Rate D11 large-load terms, MPSC Case U-22061. No primary source found (MPSC e-dockets not reachable; no MPSC or DTE release located). The December 2025 MPSC order approving DTE contracts for one data center is a special contract, not a tariff.
- NIPSCO Generation LLC (GenCo) IURC approval, Cause 46183. Approval of a generation affiliate structure, not a large-load tariff; service to data centers is by individual contract.
- NIPSCO data center electric service contract (Sept 2025). Special contract for one customer; not a tariff.
- Alliant Energy (WPL) Beaver Dam data center Electric Service Agreement, Docket 6680-TE-115. Special contract for one customer under an existing rider; the PSC ordered a separate stand-alone large load tariff (see 6680-TE-119).
- Interstate Power and Light (Alliant Iowa) Rider ICR - Individual Customer Rate. Economic-development rider for loads of 25 MW or more with prices set in individual service agreements; the current sheets were issued September 2024 but the source does not show when the rider was first adopted or approved, so it does not clearly meet the window or the large-load-terms test.
- ATC / Wisconsin Electric Minimum Transmission Charge Agreement, FERC ER26-3265. Agreements for one large-load project (one customer campus), not a generally applicable large-load tariff; facts known only from an intervenor protest.
- FERC large load show cause order to PJM (EL26-67) and other RTO show cause orders, June 18, 2026. Show cause proceeding; no transmission-owner large-load tariff has been filed or accepted yet (PJM asked for abeyance and plans a section 205 filing).
- ComEd Attachment H-13 co-located load revisions, FERC ER24-2890. Rules for co-located load at generation sites, not a large-load tariff for new grid-served loads.
- Maryland Next Generation Energy Act large-load rate schedules, PSC PC 72. State law and a PSC work group; no utility rate schedule filing was confirmed from a primary source (the September 2026 filings are reported only by EEI).
- New Jersey AB 796 large-load data center tariff law. State law with no utility tariff found yet.
- Delaware HB 233 (signed August 26, 2026). State law with no tariff of its own; the Delmarva tariff docket 25-0826 is recorded separately.
- Illinois ICC investigation into a separate ComEd large-load tariff structure. Investigation, not a tariff; the approved ComEd deposit tariff changes are recorded separately.
- Appalachian Power Virginia Large Power Service revisions, SCC PUR-2025-00057. Listed by EEI only; the current APCo Virginia tariff PDFs on the utility site do not contain large-load terms and no SCC release was found.
- Otter Tail Power Super Large General Service (Minnesota). Effective July 2022, before the 2024-01-01 window; the 2026 Otter Tail filing (26-211) and Minnesota Power filing (26-126) were found only in an EEI summary.
- PPL Electric Customer Protection Transmission Rider petition (Sept 2026). Transmission cost rider for all customers, not a large-load tariff.
- MidAmerican Energy (Iowa) data center cost page. General utility remarks; no large-load tariff stated.
- Alabama PSC procedures for review of Alabama Power large-load data center contracts (October 6, 2026, under Act 2026-610). Contract review procedure, not a tariff or rate schedule; no primary PSC or Alabama Power page found that states terms. Only news coverage read.
- Tampa Electric large load tariff filing (reported September 30, 2026). Only news coverage found; the PSC filing itself was not found, so no primary source to prove facts.
- Louisiana PSC nonbinding guidelines related to large load customers and the Lightning Amendment. Nonbinding guidelines and an interconnection process, not a tariff with size-based terms; transcript of undocketed technical conference read.
- Georgia Power large load contract filed July 27, 2026 (Docket 44280 joint statement). Review of a single customer contract under the rule; used only as a supporting source for the Georgia Power rule row.
- Missouri Senate Bill 4 (2025) large-load tariff requirement. State law; the tariffs filed under it are recorded as separate rows.
- Florida Senate Bill 484 (2026) data center law. State law with no tariff of its own; utility tariffs filed under it are recorded as separate rows.
- NC Attorney General request for a new Duke data center rate class (September 2026). Intervenor proposal, not a utility tariff; the NCUC filing returned HTTP 403.
- Entergy (Louisiana, Arkansas, Mississippi, Texas, New Orleans), Cleco, Mississippi Power, Alabama Power, Dominion Energy South Carolina, Duke Energy South Carolina, PSO, SWEPCO, Southwestern Public Service. Searched; no primary-source large-load tariff filing or approval found in the window. Not recorded.
- Xcel Energy (Public Service Company of Colorado) large load tariff. Colorado utility, outside this region (only Southwestern Public Service was in scope).
- Missouri PSC press releases pr-26-38 (Evergy) and pr-26-40 (Ameren). Pages returned HTTP 404 to the helper; EFIS orders and the Ameren release used instead.
- TVA data center rate details (threshold, terms) on tva.com. tva.com returned HTTP 403; only the board press release on the TVA investor CDN could be read, so threshold and terms stay null.
- Oregon POWER Act (HB 3546). State law; the tariffs that carry it out are recorded separately (PGE Schedule 96, PacifiCorp Schedule 401).
- Texas SB 6 (PURA §37.0561). State law; the PUCT rule 16 TAC §25.194 that sets terms is recorded separately.
- Utah S.B. 132 (Utah Code 54-26). State law; the PSC rule R746-318 is recorded separately.
- Rocky Mountain Power large-load service contract, Utah Docket 26-035-05. Special contract for one customer (over 100 MW), approved by settlement on April 10, 2026; not a tariff.
- Idaho Power Schedule 28 / Micron special contract (IPC-E-24-44). Special contract and schedule for one named customer (Micron).
- Tucson Electric Power Project Blue energy supply agreement. Agreement for one named project; TEP says it uses its standard large high-voltage rate; no new tariff.
- NV Energy large-load terms in the 2026 IRP and Clean Transition Tariff (Docket 24-05023). Fact sheet describes IRP framework conditions only; no PUCN order or tariff sheet for the Clean Transition Tariff could be read.
- Puget Sound Energy large load process. Conference presentation on an internal process; no tariff filed with the UTC found.
- Avista Washington tariff dockets UE-260007, UE-260144, UE-260567. General rate case, line extension and demand response filings; none is a large-load tariff.
- Grant PUD Rate Schedule 17 Evolving Industry Service. Rate by industry classification with a 200 kW split; no large-load size threshold and not a data center tariff by name.
- Black Hills Energy Wyoming Large Power Contract Service (LPCS). Approved by the Wyoming PSC in July 2016, before the 2024-2026 window.
- Black Hills Colorado economic development tariff (25A-0500E). No primary order or tariff sheet found; tariff sheets read were unrelated (capacity cost adjustment, community solar).
- Montana-Dakota Utilities High Density Contracted Demand Response Rate 45 (PU-22-337). Order issued October 27, 2022, before the window.
- El Paso Electric Texas rate case (Docket 57568). Preliminary order shows only line extension and reserved distribution capacity changes; no large-load rate schedule with a size threshold identified.
- SWEPCO ES-LL Contract (PUCT Docket 58796). Application PDF returned HTTP 500; not recorded. SWEPCO is also outside the listed utilities.
- PNM / Meta Los Lunas special service contracts. Special contracts with one named customer per PRC presentation; no large-load tariff.
- Otter Tail Power ND tariff updates (PU-26-98). Administrative tariff changes (special facilities, farm service, riders); not a large-load tariff.
- Madison Gas and Electric Company: Very Large Customer and Bespoke Resources Tariffs (Wisconsin PSC docket 3270-TE-124). The docket is open, but no readable primary document gives its filing date or terms; the docket documents answered 403.
- Wisconsin Power and Light Company (Alliant Energy): Large Load Customer Power Service Tariff (Wisconsin PSC docket 6680-TE-119). The docket is open, but no readable primary document gives its filing date or terms; the docket documents answered 403.
- Duke Energy Florida, LLC: Large Load Customer (LLC-1) rate schedule and Large Load Customer Policy (2025 petition). Duke Energy Florida told the PSC it will withdraw this petition and file a modified tariff in a new docket; no source shows the withdrawal. The 2026 petition is a row.
By state
30 states with a tariff or rule · the rest have none in the register- Alaska None found
- Maine None found
- Wisconsin Approved Xcel Energy (Northern States Power Company-Wisconsin) · filedWe Energies (Wisconsin Electric Power Company) · approved
- Vermont None found
- New Hampshire None found
- Washington None found
- Idaho None found
- Montana Filed only NorthWestern Energy (NorthWestern Corporation) · filed
- North Dakota Filed only Otter Tail Power Company · filed
- Minnesota Approved Xcel Energy (Northern States Power Company - Minnesota) · approved
- Illinois Approved ComEd (Commonwealth Edison Company) · approved
- Michigan Approved Indiana Michigan Power (I&M) · approvedConsumers Energy · approved
- New York None found
- Massachusetts None found
- Oregon Approved Portland General Electric Company · approvedPacifiCorp, d/b/a Pacific Power · filedPacifiCorp dba Pacific Power · approved
- Nevada None found
- Wyoming None found
- South Dakota Filed only Otter Tail Power Company · filed
- Iowa None found
- Indiana Approved Indiana Michigan Power (I&M) · approved
- Ohio Approved AES Ohio (The Dayton Power and Light Company) · filedAEP Ohio (Ohio Power Company) · approved
- Pennsylvania Approved PPL Electric Utilities Corporation · approvedPennsylvania electric distribution companies (model tariff) · approved
- New Jersey None found
- Connecticut None found
- Rhode Island None found
- California Approved Pacific Gas and Electric Company · approved
- Utah Approved Rocky Mountain Power (PacifiCorp) and other qualified electric utilities · approved
- Colorado Filed only Xcel Energy (Public Service Company of Colorado) · filed
- Nebraska None found
- Missouri Approved The Empire District Electric Company d/b/a Liberty · filedAmeren Missouri · approvedEvergy Missouri Metro and Evergy Missouri West · approved
- Kentucky Approved Tennessee Valley Authority · approvedKentucky Utilities Company (KU) · approvedLouisville Gas and Electric Company (LG&E) · approvedEast Kentucky Power Cooperative (with its owner-member cooperatives) · approvedDuke Energy Kentucky · approvedKentucky Power Company · approved
- West Virginia Approved Appalachian Power Company and Wheeling Power Company · approved
- Virginia Approved Tennessee Valley Authority · approvedDominion Energy Virginia (Virginia Electric and Power Company) · approved
- Maryland None found
- Delaware Filed only Delmarva Power & Light Company · filed
- Arizona Approved Arizona Public Service Company · filedSalt River Project · approved
- New Mexico None found
- Kansas Approved Evergy Kansas Central · approved
- Arkansas None found
- Tennessee Approved Tennessee Valley Authority · approved
- North Carolina Approved Duke Energy Carolinas and Duke Energy Progress · filedTennessee Valley Authority · approved
- South Carolina Approved South Carolina Public Service Authority (Santee Cooper) · approved
- District of Columbia None found
- Oklahoma Filed only OG&E · filed
- Louisiana None found
- Mississippi Approved Tennessee Valley Authority · approved
- Alabama Approved Tennessee Valley Authority · approved
- Georgia Approved Tennessee Valley Authority · approvedGeorgia Power · approved
- Hawaii None found
- Texas Approved ERCOT transmission and distribution service providers · approvedEl Paso Electric Company · filedEl Paso Electric Company · approved
- Florida Approved Duke Energy Florida, LLC · filedFlorida Power & Light Company · approved
Sources
tariffs.csv Every dataset → Status → Glossary →- The orders, releases and docket pages of the state regulators and public power boards, and the utilities’ own releases, filings and tariff sheets: 78 documents, linked on each row above, checked 19 October 2026.
- The utilities of each county: U.S. Energy Information Administration, Form EIA-861, as on the Power pages. The sites and what they draw: the Buildout.
- Each row is a set of facts, with short quotations from its sources as evidence.