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.
Frequently asked
-
What are the typical time-of-use on-peak hours in Iowa?
Across the 3 residential TOU plans tou.tools tracks in Iowa, the most common on-peak window is 2 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.
-
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 — 6 active schedules in total. The largest by customers served are MidAmerican Energy Co and Interstate Power and Light Co. They span investor-owned utilities. The full list above is sorted by customers served.
-
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 3 plans. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
-
Do Iowa time-of-use hours change by season?
Some do. Of the 3 residential TOU plans we track in Iowa, 1 shift their period boundaries between seasons (typically summer and winter), while 2 keep the same hours year-round. Each schedule above lists its exact season dates.
-
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.
Time-of-use periods for all of Iowa, one API.
Resolve any Iowa ZIP or address to its utility and get the current period plus the next transition — over REST or MCP.