Black Hills Power, Inc. Electricity Rates and Average Bill (South Dakota)
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, Black Hills Power, Inc.'s residential customers in South Dakota paid an average effective rate of 18.19¢/kWh with an average monthly bill of $152.09, per EIA Form 861-M data. That rate is 3.0¢ above the South Dakota average of 15.15¢/kWh; the U.S. average is 18.16¢/kWh.
Rate trend vs the South Dakota average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 16.11 | 96.92 | 602 |
| October 2025 | 16.46 | 100.06 | 608 |
| November 2025 | 15.78 | 112.28 | 712 |
| December 2025 | 14.60 | 129.79 | 889 |
| January 2026 | 15.07 | 143.70 | 954 |
| February 2026 | 15.24 | 113.93 | 748 |
| March 2026 | 15.44 | 109.55 | 710 |
| April 2026 | 15.08 | 98.26 | 652 |
| May 2026 | 15.45 | 96.20 | 623 |
| June 2026 | 15.91 | 100.60 | 632 |
| July 2026 | 14.33 | 148.16 | 1034 |
| August 2026 | 18.19 | 152.09 | 836 |
Black Hills Power, Inc. vs South Dakota vs the U.S.
| Black Hills Power, Inc. | South Dakota | U.S. average | |
|---|---|---|---|
| Rate (August 2026) | 18.19¢/kWh | 15.15¢/kWh | 18.16¢/kWh |
| Average monthly bill | $152.09 | $160.09 | $209.23 |
| Average monthly usage | 836 kWh | 1057 kWh | 1152 kWh |
| Rate change, 1 year | +14.1% | +9.0% | +3.4% |
Estimate a bill at Black Hills Power, Inc. rates
Worked example: 1,000 kWh at Black Hills Power, Inc.'s average effective rate of 18.19¢/kWh is about $181.90. The utility's actual average usage is 836 kWh/month, which produces the $152.09 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full South Dakota rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.