Iowa time-of-use hours by utility
Every Iowa 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 Iowa
Sorted by number of customers served in Iowa.
No utilities match those filters.
Resolve any Iowa 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 Iowa?
Across the 4 residential TOU plans tou.tools tracks in Iowa, the most common on-peak window is 2 PM – 7 PM (3 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 Iowa offer time-of-use rate plans?
tou.tools tracks 2 Iowa utilities with at least one active TOU rate plan — 12 active schedules in total. The largest by customers served are MidAmerican Energy and Alliant Energy (Iowa). They span investor-owned utilities. The full list above is sorted by customers served.
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Do Iowa time-of-use peak hours apply on weekends?
On the residential TOU plans we track in Iowa, on-peak hours apply on weekdays only — weekends are off-peak across all 4 plans. 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 Iowa time-of-use hours change by season?
Some do. Of the 4 residential TOU plans we track in Iowa, 1 shift their period boundaries between seasons (typically summer and winter), while 3 keep the same hours year-round. Each schedule above lists its exact season dates.
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How do I find which Iowa utility serves a specific address or ZIP code?
tou.tools maps 1,006 Iowa 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.