Updated: March 2026
Commercial rate guide for Nicor — Northern Illinois suburbs of Chicago, serving approximately 2.2 million customers across communities in DuPage, Will, Lake, Kane, and surrounding counties. Largest gas distributor in Illinois.
General commercial service (Rate 4) with customer charge and volumetric rate. Large volume service (Rate 6) with declining block rates. Purchased gas charge adjusted quarterly. Environmental cost recovery rider.
Rising
3.1% delivery rate increase effective January 2026, approved by Illinois Commerc
3.1% delivery rate increase effective January 2026, approved by Illinois Commerce Commission
Property managers with Nicor accounts frequently encounter these billing challenges:
Purchased gas charge volatility during winter heating season
Environmental cost recovery rider as a newer surcharge
QIP rider charges increasing each quarter
Customer choice program complexity for competitive gas supply
The utility is the sole provider in this service territory.
Illinois allows customer choice for gas supply through alternative gas suppliers. Nicor Gas provides regulated delivery service. Customers can choose between Nicor gas supply or a competitive supplier.
Qualifying infrastructure plant (QIP) rider filing pending before ICC for accelerated pipeline replacement
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