Electric Residential Service Usage Time of Day - 407
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 | 0.11134 | 0.05068 | 0.16202 |
Period 2
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.22269 | 0.05068 | 0.27337 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $1,142.16 | $0.1904 |
| 1000 | $2,098.32 | $0.1749 |
| 2000 | $4,010.63 | $0.1671 |
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 $835 and $1,535 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
Large General Service Usage customers for all electric uses in one establishment adjacent to an electric distribution circuit of adequate capacity. No resale of service is permitted. Customers on this rate must have energy usage of 20,000 kWh or more in each billing month. Customers falling below required metered usage levels will be placed on the General Service Usage rate for a minimum of one year.* Service hereunder is also subject to Company's Rules and Regulations.
URDB rate id 6880a3bca0fd88bf8a0866fd · utility source document · all Interstate Power and Light Co tariffs