Residential tariff · MT
REDS-1 Residential Customer
NorthWestern Corporation · Flat · filed 2023
What this tariff charges
| Fixed charge | $4.20 per month |
|---|---|
| Structure | Flat |
| Filed | 2023-04-01 |
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.
Energy charge
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.02830 | 0.00294 | 0.03124 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $237.82 | $0.0396 |
| 1000 | $425.24 | $0.0354 |
| 2000 | $800.09 | $0.0333 |
Effective rate includes the fixed charge, which is why it falls as usage rises.
Rooftop solar on this tariff
A 7 kW system costing $21,000 before incentives would save between $159 and $294 a year on this tariff, paying back in 71–132 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 →
URDB rate id 64419026e8e6c8485506ea8c · utility source document · all NorthWestern Corporation tariffs