Alliant Energy Iowa electricity rates
Interstate Power and Light Co, as the EIA and URDB list it
Interstate Power and Light Co's customers paid 17.9¢ per kWh in 2024, riders included (EIA-861): about $128 a month for 714 kWh. Electric Residential Service Usage - 400, the one open plan at 1,000 kWh a month, comes to $2,095 a year. Schedule retrieved October 8, 2026.
Every priced Interstate Power and Light Co plan, 1,000 kWh/mo
| Plan | Per year | vs cheapest | Effective |
|---|---|---|---|
| Electric Residential Service Usage - 400✓ cheapestpriced by season · in effect since July 2025 | $2,095.41 | — | 17.5¢ |
| Priced but not ranked — restricted, older, or not verifiable as a bill | |||
| Electric Residential Service Optional Demand - 507time-of-use · demand charge · in effect since July 2025 · needs a household using 20,000 kWh a month or more | $1,327.67 | −$767.74 | 11.1¢ |
| Optional Residential Service Demand Rate Rd-1 (Wisconsin)time-of-use · demand charge · in effect since July 2014 · older schedule, not ranked | $1,432.63 | −$662.78 | 11.9¢ |
| Optional Residential Time of Use Rg-5 (Wisconsin)time-of-use · in effect since July 2014 · older schedule, not ranked | $1,544.60 | −$550.81 | 12.9¢ |
| Electric Residential Service Usage - 400 [Net Metering Pilot]priced by season · tiered · in effect since April 2018 · pilot programme | $1,954.29 | −$141.12 | 16.3¢ |
| Electric Residential Service Usage Time of Day - 407time-of-use · in effect since July 2025 · needs a household using 20,000 kWh a month or more | $2,094.81 | −$0.60 | 17.5¢ |
Price Interstate Power and Light Co’s plans at your own usage
What the one Interstate Power and Light Co plan ranked here costs at each level of use
- 500 kWh/mo — $1,140.72 (Electric Residential Service Usage - 400), the one plan ranked here
- 1,000 kWh/mo — $2,095.41 (Electric Residential Service Usage - 400), the one plan ranked here
- 2,000 kWh/mo — $4,004.79 (Electric Residential Service Usage - 400), the one plan ranked here
What Interstate Power and Light Co's customers were billed in 2024
Priced at 714 kWh a month, what Interstate Power and Light Co's customers used on average, its open plans come within 1% of what EIA reports they were billed in 2024: the plans here describe its bills well.
| Ownership, as EIA classes it | Investor-owned |
|---|---|
| Full-service homes in Iowa | 417,153 |
| Share of Iowa's households | 29% |
| Average use per home | 714 kWh a month |
| Average bill per home | $127.80 a month |
| Billed per kWh, riders included | 17.9¢ |
| Median open plan here, at that use | 18.1¢ |
Interstate Power and Light Co in U.S. Energy Information Administration, Form EIA-861, 2024 (Sales_Ult_Cust_2024.xlsx), retrieved September 23, 2026.
How the Electric Residential Service Usage - 400 bill at 1,000 kWh has moved since 2014
Interstate Power and Light Co's Electric Residential Service Usage - 400 cost $149.75 a month under its April 2014 version and costs $174.62 under its July 2025 one, 17% more. Its biggest single step, in June 2014, took off $13.95 (9.3%). In Iowa, EIA's average price rose 23% between 2014 and 2025.
Every version of Electric Residential Service Usage - 400
| Took effect | At 1,000 kWh | Change | Record |
|---|---|---|---|
| July 2025 | $174.62 | +$4.57 (+2.7%) | URDB |
| July 2024 | $170.05 | −$6.62 (−3.7%) | URDB |
| January 2023 | $176.67 | +$14.11 (+8.7%) | URDB |
| April 2019 | $162.56 | +$1.89 (+1.2%) | URDB |
| April 2018 | $160.67 | +$13.14 (+8.9%) | URDB |
| March 2017 | $147.53 | +$4.74 (+3.3%) | URDB |
| June 2016 | $142.79 | +$6.99 (+5.1%) | URDB |
| June 2014 | $135.80 | −$13.95 (−9.3%) | URDB |
| April 2014 | $149.75 | First on record | URDB |
In the guides: Why electricity rates change
How it compares
Among the 100 utilities indexed, Interstate Power and Light Co's cheapest open plan is the 40th-highest, 12% more than their median of $1,877.14. It sits between Public Service Co of Colorado ($2,035.24) and Public Service Co of NM ($2,121.42).
Electric Residential Service Usage - 400 changes price with the season: a kWh costs 3.4¢ more in June to August than in September to May, and the same 1,000 kWh is billed $200.46 in its dearest month against $164.87 in its cheapest.
In the guides: The price that changes with the month
Cheapest 6 plans at 1,000 kWh a month
Electric Residential Service Usage - 400 — $2,095.41 a year, 17.5¢ per kWh effective, priced by season. It carries a $0.51 daily standing charge. In effect since July 2025.
Electric Residential Service Optional Demand - 507 — $1,327.67 a year, 11.1¢ per kWh effective, time-of-use and demand-charged. It carries a $0.51 daily standing charge. In effect since July 2025. Restricted: needs a household using 20,000 kWh a month or more.
Optional Residential Service Demand Rate Rd-1 (Wisconsin) — $1,432.63 a year, 11.9¢ per kWh effective, time-of-use and demand-charged. It carries a $15.00 monthly standing charge. In effect since July 2014. Too old to quote as a current price.
Optional Residential Time of Use Rg-5 (Wisconsin) — $1,544.60 a year, 12.9¢ per kWh effective, time-of-use. It carries a $15.00 monthly standing charge. In effect since July 2014. Too old to quote as a current price.
Electric Residential Service Usage - 400 [Net Metering Pilot] — $1,954.29 a year, 16.3¢ per kWh effective, tiered and priced by season. It carries a $13.00 monthly standing charge. In effect since April 2018. Too old to quote as a current price.
Electric Residential Service Usage Time of Day - 407 — $2,094.81 a year, 17.5¢ per kWh effective, time-of-use. It carries a $0.51 daily standing charge. In effect since July 2025. Restricted: needs a household using 20,000 kWh a month or more.
How Interstate Power and Light Co's plans are structured
Of 6 priceable plans: 1 tiered, 4 time-of-use, 2 priced by season, 2 with demand charges.
Fixed monthly charges run from $13.00 to $15.29.
Interstate Power and Light Co's published schedules
EIA-861 lists Interstate Power and Light Co serving homes in Iowa and in no other state, which is how its plans are placed there. 6 of its 6 published residential schedules can be priced.