Utility Tariff Analysis · Updated September 2026

ComEd's Rider DE for Large Load Customers: What It Means for AI Data Centre Siting in Illinois

September 18, 2026 6 min read Strategic Crypto Reserve Data Centre Infrastructure

New large-load service requests under ComEd's revised procedures are now governed by revisions to Rider DE clarifying requirements for new service requests, alongside revised General Terms & Conditions designed to protect other customers from large demand applicants.

The Tariff Explained Model a IL Build
ComEd's Rider DE for Large Load Customers — AI data centre infrastructure

ComEd's Rider DE for Large Load Customers

IL

Commonwealth Edison (Exelon)

25-0679 / 25-0677

Regulatory docket / filing reference

New large-load service requests under ComEd's revised procedures

Who the tariff applies to

New large-load service requests under ComEd's revised procedures are now governed by revisions to Rider DE clarifying requirements for new service requests, alongside revised General Terms & Conditions designed to protect other customers from large demand applicants.

Also active in Illinois: ComEd is serving several of the largest announced Midwest campuses: a 700 MW Equinix project in Minooka backed by a Transmission Security Agreement, a $10 billion Compass Datacenters campus in Hoffman Estates, and an up-to-1,000 MW Tract project in Morris.

Named Projects Already Underway

CustomerLocationDetails
EquinixMinooka, IL700 MW data centre project, protected by a Transmission Security Agreement covering infrastructure costs
TractMorris, ILdata centre project of up to 1,000 MW

Figures compiled from the Edison Electric Institute's "Large Load Projects and Tariffs" (September 2026) member-company summary and public regulatory filings. Confirm current tariff terms directly with Commonwealth Edison (Exelon) and the relevant state public utility commission before relying on any figure for a capital decision.

Weighing Illinois against another state or a Canadian province with a different rate and interconnection picture entirely? Run both sides of the comparison through our licensed AI data centre cost configurator — it applies each jurisdiction's actual power rate, tax treatment and large-load tariff rules to the same seven build configurations.

Model This State on Your Own Site

Every figure above comes from the same power-cost and tariff dataset behind the SCR AI Build Configurator — a licensed, embeddable widget that models seven data centre build configurations against all nine Canadian provinces and all 50 US states plus DC, returning capital expenditure by line item, energy cost, revenue by commercial structure, EBITDA and payback.

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Frequently Asked Questions

What is ComEd's Rider DE for Large Load Customers?

New large-load service requests under ComEd's revised procedures are now governed by revisions to Rider DE clarifying requirements for new service requests, alongside revised General Terms & Conditions designed to protect other customers from large demand applicants.

Why did Commonwealth Edison (Exelon) introduce this large-load structure?

To ensure the cost of new generation, transmission and distribution infrastructure built to serve very large customers, chiefly hyperscale data centres, is paid for by those customers rather than spread across the general rate base of residential and small commercial ratepayers.

What large data centre projects are already active in Illinois?

ComEd is serving several of the largest announced Midwest campuses: a 700 MW Equinix project in Minooka backed by a Transmission Security Agreement, a $10 billion Compass Datacenters campus in Hoffman Estates, and an up-to-1,000 MW Tract project in Morris.

Does this tariff replace Illinois's standard commercial and industrial rates?

No. ComEd's Rider DE for Large Load Customers sits above Commonwealth Edison (Exelon)'s standard commercial and industrial rate schedules and applies specifically to customers that meet or exceed the large-load threshold described above. Smaller commercial and industrial loads continue to be billed under existing rate schedules.

How can I model a Illinois data centre build against this tariff and other states?

The SCR AI Build Configurator applies Illinois's power cost, tax treatment and large-load tariff rules alongside all other US states and Canadian provinces, so a Illinois scenario can be compared line-by-line against any alternative site.