Illinois time-of-use hours by utility
Every Illinois electric utility we track with at least one active time-of-use rate plan, with peak and off-peak hours verified against the published tariff. Periods only — no price values.
Every TOU schedule on this page verified since
Utilities in Illinois
Sorted by number of customers served in Illinois.
No utilities match those filters.
Resolve any Illinois ZIP in one call.
Utility + current period + next transition.
FAQ's
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What are the typical time-of-use on-peak hours in Illinois?
Across the 3 residential TOU plans tou.tools tracks in Illinois, the most common on-peak window is 1 PM – 7 PM (2 plans); others run 1 PM – 6 PM. Every hour outside the on-peak (and any mid-peak) window is billed as off-peak. Exact boundaries vary by utility and plan — see each utility's schedule above.
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Which electric utilities in Illinois offer time-of-use rate plans?
tou.tools tracks 2 Illinois utilities with at least one active TOU rate plan — 7 active schedules in total. The largest by customers served are ComEd and MidAmerican Energy. They span investor-owned utilities. The full list above is sorted by customers served.
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Do Illinois time-of-use peak hours apply on weekends?
It depends on the plan. Of the 3 residential TOU plans we track in Illinois, 2 apply on-peak periods every day including weekends, while 1 restrict on-peak to weekdays and treat weekends as off-peak. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
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Do Illinois time-of-use hours change by season?
Not on the plans we track. All 3 residential TOU plans in Illinois keep the same period hours year-round. Each schedule above lists its exact season dates.
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How do I find which Illinois utility serves a specific address or ZIP code?
tou.tools maps 1,130 Illinois ZIP codes to the utilities that serve them. Because service territories can overlap, a ZIP may return more than one candidate utility; supplying a full street address resolves it to a single utility via a geocoded point-in-territory lookup. The REST API and MCP server both return the matching utility and its current TOU period.