Commonwealth Edison (ComEd), large demand project applicants (Rider DE)
Large-load tariff for data centers: what is on file, the terms the filings state, and where each fact comes from. Terms a filing does not state are marked, never guessed.
StatusApproved Last reviewed 2026-03-30
Applies atProjected maximum kilowatts delivered of 50 MW or more before December of the 10th year after the requested service date
What the filing saysLarge demand project applicants must post a deposit for analysis and engineering costs: $1,000,000, plus $500,000 for each additional whole 100 MW above 200 MW. Deposits above $2,000,000 require an acceptable letter of credit for the excess. Subject to the ICC investigation in dockets 25-0677/25-0679. SEPARATELY, not a ComEd/utility matter: Gov. Pritzker directed the Dept. of Commerce and Economic Opportunity (DCEO) to pause processing new agreements under the state's Data Center Investment Program (a state tax-incentive program, not a utility interconnection process) effective July 1, 2026 -- announced June 5, 2026, framed as part of a 2-year incentive suspension pending legislative study of cost/environmental impact. Existing agreements signed before July 1, 2026 are honored; this does not affect ComEd's Rider DE process above.
Stated terms
This tariff does not yet have terms we can tabulate. The status text above is what the filings and our source state. See the source below.
Source
ComEd compliance filing, ICC Docket 25-0677/25-0679 (March 30 2026): https://www.icc.illinois.gov/downloads/public/filing/4/397281.pdf; Gov. Pritzker DCEO directive, announced June 5, 2026 (news coverage: eenews.net, stlpr.org; Governor's office primary text not directly located during this research).
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Screening information from public filings, not legal or investment advice. Tariffs change; confirm the current terms with the utility and the commission before relying on them.