Home / Illinois / Price change dates The standard price is what you pay if you never picked another company. Here is when each company’s price changes next, and how it changed in the past year.
“Announced” means the new price is published. “Due” means today’s price ends, but the next one isn’t published yet.
Coming up December 1, 2026
What happens Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.December 1, 2026
What happens Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.December 1, 2026
What happens Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.June 1, 2027
What happens Due, not announced yet. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.June 1, 2027
What happens Due, not announced yet. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.Upcoming standard price changes in Illinois Date Company What happens December 1, 2026 Nicor Gas Gas Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.December 1, 2026 North Shore Gas Gas Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.December 1, 2026 Peoples Gas Gas Due, not announced yet. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.June 1, 2027 Ameren Illinois Electric Due, not announced yet. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.June 1, 2027 ComEd Electric Due, not announced yet. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.
Company by company Electric
How often: Usually on June 1 and October 1.
Next: June 1, 2027. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.
Add Ameren’s dates to your calendar (.ics file)
Changes in the past year (11) October 1, 2026: Price changed to 10.44 cents per kWh (down from 11.33 cents)September 1, 2026: Price changed to 11.33 cents per kWh (same as before)August 1, 2026: Price changed to 11.33 cents per kWh (same as before)July 1, 2026: Price changed to 11.33 cents per kWh (same as before)June 1, 2026: Price changed to 11.33 cents per kWh (up from 8.77 cents)May 1, 2026: Price changed to 8.77 cents per kWh (same as before)April 1, 2026: Price changed to 8.77 cents per kWh (same as before)March 1, 2026: Price changed to 8.77 cents per kWh (same as before)February 1, 2026: Price changed to 8.77 cents per kWh (same as before)January 1, 2026: Price changed to 8.77 cents per kWh (up from 8.4 cents)December 1, 2025: Price changed to 8.4 cents per kWh (same as before)Electric
How often: Usually on June 1 and October 1.
Next: June 1, 2027. Today's price is set through May 31, 2027. A new price is due. It isn't announced yet.
Add ComEd’s dates to your calendar (.ics file)
Changes in the past year (11) October 1, 2026: Price changed to 10.1 cents per kWh (down from 10.4 cents)September 1, 2026: Price changed to 10.4 cents per kWh (same as before)August 1, 2026: Price changed to 10.4 cents per kWh (same as before)July 1, 2026: Price changed to 10.4 cents per kWh (same as before)June 1, 2026: Price changed to 10.4 cents per kWh (up from 9.66 cents)May 1, 2026: Price changed to 9.66 cents per kWh (same as before)April 1, 2026: Price changed to 9.66 cents per kWh (same as before)March 1, 2026: Price changed to 9.66 cents per kWh (same as before)February 1, 2026: Price changed to 9.66 cents per kWh (same as before)January 1, 2026: Price changed to 9.66 cents per kWh (down from 9.69 cents)December 1, 2025: Price changed to 9.69 cents per kWh (same as before)Gas
How often: Every month.
Next: December 1, 2026. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.
Add Nicor’s dates to your calendar (.ics file)
Changes in the past year (12) November 1, 2026: Price changed to 31 cents per therm (down from 33 cents)October 1, 2026: Price changed to 33 cents per therm (same as before)September 1, 2026: Price changed to 33 cents per therm (down from 36 cents)August 1, 2026: Price changed to 36 cents per therm (same as before)July 1, 2026: Price changed to 36 cents per therm (same as before)June 1, 2026: Price changed to 36 cents per therm (same as before)May 1, 2026: Price changed to 36 cents per therm (down from 46 cents)April 1, 2026: Price changed to 46 cents per therm (down from 49 cents)March 1, 2026: Price changed to 49 cents per therm (down from 53.23 cents)February 1, 2026: Price changed to 53.23 cents per therm (up from 42 cents)January 1, 2026: Price changed to 42 cents per therm (up from 39 cents)December 1, 2025: Price changed to 39 cents per therm (same as before)Gas
How often: Every month.
Next: December 1, 2026. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.
Add North Shore Gas’s dates to your calendar (.ics file)
Changes in the past year (12) November 1, 2026: Price changed to 39.23 cents per therm (up from 37.69 cents)October 1, 2026: Price changed to 37.69 cents per therm (down from 38.88 cents)September 1, 2026: Price changed to 38.88 cents per therm (down from 40.93 cents)August 1, 2026: Price changed to 40.93 cents per therm (down from 42.46 cents)July 1, 2026: Price changed to 42.46 cents per therm (up from 42.37 cents)June 1, 2026: Price changed to 42.37 cents per therm (down from 50.53 cents)May 1, 2026: Price changed to 50.53 cents per therm (up from 49.82 cents)April 1, 2026: Price changed to 49.82 cents per therm (up from 44.55 cents)March 1, 2026: Price changed to 44.55 cents per therm (down from 46.76 cents)February 1, 2026: Price changed to 46.76 cents per therm (down from 53.23 cents)January 1, 2026: Price changed to 53.23 cents per therm (up from 51.53 cents)December 1, 2025: Price changed to 51.53 cents per therm (up from 43.91 cents)Gas
How often: Every month.
Next: December 1, 2026. Today's price is set through November 30, 2026. A new price is due. It isn't announced yet.
Add Peoples Gas’s dates to your calendar (.ics file)
Changes in the past year (12) November 1, 2026: Price changed to 35.18 cents per therm (up from 32.83 cents)October 1, 2026: Price changed to 32.83 cents per therm (up from 31.45 cents)September 1, 2026: Price changed to 31.45 cents per therm (down from 36.72 cents)August 1, 2026: Price changed to 36.72 cents per therm (down from 39.11 cents)July 1, 2026: Price changed to 39.11 cents per therm (up from 36.76 cents)June 1, 2026: Price changed to 36.76 cents per therm (down from 45.99 cents)May 1, 2026: Price changed to 45.99 cents per therm (up from 41.23 cents)April 1, 2026: Price changed to 41.23 cents per therm (up from 40.67 cents)March 1, 2026: Price changed to 40.67 cents per therm (up from 38.81 cents)February 1, 2026: Price changed to 38.81 cents per therm (down from 41.81 cents)January 1, 2026: Price changed to 41.81 cents per therm (up from 40.63 cents)December 1, 2025: Price changed to 40.63 cents per therm (up from 34.46 cents)More about prices in Illinois Let Judy check your energy bills Send me a photo of your bill. I’ll tell you, in dollars, if you should change or stay.
We compare your price with every offer on Plug In Illinois for your area. No one will call you or knock on your door.
See how much I could save