Alliant Energy (Iowa) peak
& off-peak hours

Below is every active TOU rate plan we track for Alliant Energy (Iowa) — 7 plans — with period boundaries verified against the published tariff. No price values; periods only.

Rate Plans

RATE-407 Electric Residential Service - Optional Two-Part Time of Day

Residential
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-427 Electric Residential Service - Optional Three-Part Time of Day

Residential
PeriodSeasonDaysHours
Super Off-Peak All year Every day 12 AM – 8 AM
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-507 Electric Residential Service - Optional Demand Rate

Residential
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-447 Electric Large General Service

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-487 Electric Large General Service - Interruptible Option

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-607 Electric Non-Residential General Service - Optional Two-Part Time of Day

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified

RATE-707 Electric Non-Residential General Service - Optional Demand Rate

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Aug 31 Mon–Fri 2 PM – 7 PM
Effective
Oct 1, 2024
Verified
Free · no credit card

Use these Alliant Energy (Iowa) hours in your app.

Current period and next transition for any ZIP or address.

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FAQ's

  1. What are Alliant Energy (Iowa)'s on-peak hours?

    On the RATE-407 plan (Electric Residential Service - Optional Two-Part Time of Day), on-peak hours run from 2 PM – 7 PM on weekdays. All remaining hours are classified as off-peak.

  2. Does Alliant Energy (Iowa) charge more for electricity at certain times?

    Yes. Alliant Energy (Iowa) offers time-of-use (TOU) rate plans where electricity costs vary depending on the period. The period—peak, off-peak, mid-peak, or super off-peak—depends on the time, day, and season. This page lists boundaries for 7 active schedules; tou.tools does not publish pricing ($/kWh) details.

  3. How do I get Alliant Energy (Iowa) time-of-use periods in my app?

    Schedules are accessible programmatically via the tou.tools REST API and MCP server for AI agents. By querying a U.S. address or ZIP code, your application can instantly retrieve the current period and next scheduled transition time. Developer API keys are free.

  4. Do Alliant Energy (Iowa) time-of-use hours change during holidays or seasons?

    Yes. Peak hours and rate periods can vary by season (typically summer and winter halves) and special holidays. While some schedules like E-ELEC keep stable hours year-round, others introduce super off-peak windows or adjust peak times. Check each rate plan card above for specific seasonal boundaries.