Electric Residential Service Usage - 400
Interstate Power and Light Co · Time-of-use · filed 2025
What this tariff charges
| Fixed charge | $15.50 per month |
|---|---|
| Structure | Time-of-use |
| Filed | 2025-07-01 |
Energy rates
The charged price is the base rate plus its adjustment. Adjustments carry fuel and rider costs and are frequently most of the bill, so a comparison built on the base rate alone is meaningless.
Period 0
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.09992 | 0.05068 | 0.15060 |
Period 1
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.13398 | 0.05068 | 0.18466 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $1,140.69 | $0.1901 |
| 1000 | $2,095.38 | $0.1746 |
| 2000 | $4,004.76 | $0.1669 |
Effective rate includes the fixed charge, which is why it falls as usage rises. This is a time-of-use tariff, so the result also depends on when power is used; an average residential pattern is assumed. Details →
Rooftop solar on this tariff
A 7 kW system costing $21,000 before incentives would save between $825 and $1,529 a year on this tariff, paying back in 14–25 years . No federal tax credit is included: Section 25D ended on December 31, 2025.
no sell rate filed, but this utility reports residential net metering - the range spans no export credit to full retail netting. Compare across this state →
The utility's own description
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.
URDB rate id 688099521ed11411230c3a2d · utility source document · all Interstate Power and Light Co tariffs