Electric Residential Service Usage - 400
When does peak hit on Interstate Power and Light Co’s Electric Residential Service Usage - 400? The hour never matters here — only the season. Rates peak June–August.
- peak18.47¢
- off-peak15.06¢
What does Electric Residential Service Usage - 400 cost a year?
| Household | Uses | A month | Per year | Works out to |
|---|---|---|---|---|
| Apartment One or two people, no central air, no electric heat | 4,866 kWh | $80 | $961 | 19.7¢ / kWh |
| Family home Three or four people with central air conditioning | 9,453 kWh | $143 | $1,716 | 18.2¢ / kWh |
| Home with an EV Same house, plus an electric car charging overnight | 13,103 kWh | $191 | $2,297 | 17.5¢ / kWh |
Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.
What you actually pay
| Period | Rate | Applies when |
|---|---|---|
| peak | 18.47¢ | midnight–midnight, June–August |
| off-peak | 15.06¢ | midnight–midnight, September–May |
Plus a fixed charge of $0.5096 per day — so longer months cost more before you use a single kWh.
Should you be on Electric Residential Service Usage - 400?
The hour of day does not change what you pay here — the month does. Running the same house through the full year, July costs about $219 and February about $104. That $114 swing is part rate and part weather, and it is the reason a budget built on your spring bill will break in July.
Before a single kilowatt-hour moves, this plan charges $186 a year in fixed fees. On the apartment above that is 19% of the whole bill; on the house with a car charging in it, 8%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.
How it compares to Interstate Power and Light’s other plans
Measured against the other residential plans this utility files, a family home lands 1st cheapest of 2 — nothing else here beats it for that household.
Other Interstate Power and Light plans
Who can be on Interstate Power and Light’s Electric Residential Service Usage - 400?
Eligibility is not our judgement — it is written into the tariff Interstate Power and Light filed. This is what that document says:
To residential customers in single family dwellings or individually metered apartments for all domestic use. No resale of electric service is permitted hereunder. Service hereunder is also subject to Company's Rules and Regulations.
Quoted from the filed tariff. Your utility decides eligibility, not us; check with them before you switch.
If this is new to you
- How to read your electric bill
Four kinds of charge, only two of which you can do anything about.
- Should you switch to a time-of-use electricity plan?
A wide peak-to-off-peak gap is a lever, not a saving. Levers need something to move.
- Why is my electric bill so high in summer?
Usually three causes at once, and only one of them is your air conditioner.
- Why is my electric bill so high? Seven causes, in the order to check them
Seven causes, ranked by how often they are the answer. Only two are about using more.
Where this comes from
- Effective
- 2025-07-01
the date this tariff took effect
- Covers
- delivery + supply
the ZIP-code service map lists this territory as bundled, so the utility sells delivery and supply together
- Enrollment
- open to new customers