Utility Cost Calculators South Dakota

South Dakota Utility Cost Calculator

South Dakota utilities: about $296 a month for a typical home (electric ~$153, gas ~$41, water ~$37, internet ~$65) at EIA's 15.37¢/kWh. Try your own numbers.

Typical total monthly utility bill in South Dakota: $296 for a 1,800 sq ft home with 3 occupants -- $153 electricity, $41 natural gas, $37 water/sewer, and $65 internet under this page's default assumptions. Change the inputs below, or compare states with the utility bill estimator.

What sets South Dakota utility bills
Measure	South Dakota	Rank, normal or source
Electricity price, July 2026	15.37¢ per kWh (July 2025 14.52¢, +5.9%)	33rd highest of 50; 16% below U.S.
Use per home, 2024	994 kWh a month	18th highest of 50; 15% above U.S.
Electric bill	994 kWh × 15.37¢ = $152.78, about $153	2024: $127.81 at 12.86¢, 34th highest of 50
Natural gas, 2025 average	$9.86 per Mcf (about $0.95 per therm)	40th highest of 44 (2025 averages); July 2026 $17.77, not used
Heating degree days, Jul 2025–Jun 2026	6,572	normal 7,848, 16% below
Cooling degree days, same months	835	normal 731, 14% above
Home energy, 2024	electricity 47.6%, natural gas 36%, heating oil and propane 10.4%, wood 4.1%, geothermal 1.8%	EIA SEDS, at the meter
In-state generation, 2024	wind 57.8%, hydroelectric 22%, natural gas 10.8%	EIA-923
Largest residential sellers, 2024	Northern States Power Co - Minnesota (investor-owned) 15.9%; NorthWestern Energy - (SD) (investor-owned) 10.8%	EIA-861

EIA (EPM 5.6.A, EIA-861, gas annual prices at 10.37 therms per Mcf) read 2026-10-11; NOAA CPC, EIA SEDS and EIA-923 2026-10-13.

By StateCalc Team

Updated Oct 22, 2026 Estimate — not official figures

Use Calculator Free — No Sign-up Instant Results Updated Oct 2026

Estimate only — these are not official figures

EIA use and prices for South Dakota; home-size scaling, gas use, water and internet modeled

Do not rely on these amounts for budgeting or payment. For exact amounts, check the residential rate of Northern States Power Co - Minnesota or your own utility.

This calculator requires JavaScript. Please enable JavaScript in your browser to change the inputs and recalculate the result.

Enter Your Details

Adjust values to see instant results

Home Size (sq ft)

20010000

Number of Occupants

110

Electric Rate ($/kWh)

0.050.6

Pre-filled: EIA Electric Power Monthly, Table 5.6.A (Residential, July 2026)

Natural Gas Rate ($/therm)

0.38

Pre-filled: EIA residential natural gas price, 2025 annual average ($9.86/Mcf)

Additional Details

Water Rate ($/1000 gal)

120

South Dakota COL Index

50200

Pre-filled: C2ER Cost of Living Index (via MERIC)

Monthly Electric Bill

$153.00

Estimated • Based on your inputs

Total Monthly Utilities

$296.00

Annual Utility Costs

$3,552.00

Detailed Breakdown

Monthly Gas Bill$41.00

28%

Monthly Water & Sewer$37.00

25%

Internet & Cable (Est.)$65.00

44%

% of Median Income4.62%

Cost per Sq Ft/Month$0.16

Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.

South Dakota Quick Facts

None Income Tax Rate

1.00% Property Tax Rate

$76,881 Median Income

93.5 Cost of Living

How This Calculator Works

Calculation methodology and assumptions

South Dakota inputs: 994 kWh a month (EIA-861 2024) × 15.37¢ (EIA, July 2026), scaled to your home size and occupants; gas $9.86/Mcf ÷ 10.37 = $0.9508/therm (EIA 2025 annual average); water $5.14 per 1,000 gallons and internet $65/month, both from cost-of-living index 93.5; income share on $76,881.

Key State Information

433,548 South Dakota residential electricity customers (EIA-861, 2024) · cost-of-living index 93.5 · median household income $76,881.

Standard financial formulas Pre-filled with documented models and state context Estimates only — not financial advice

Data Source

U.S. Energy Information Administration (EIA), Form EIA-861 & monthly energy reports

View Original Source | Source record reviewed Aug 7, 2026 | Review target: annually

What drives South Dakota utility bills

Heating is South Dakota's larger weather load: a normal July-to-June brings 7,848 heating against 731 cooling degree days. The 2025–26 heating season peaked in Jan 2026.

Electricity supplied 47.6% of South Dakota home energy in 2024, natural gas 36%. Heating oil and propane (10.4%) are not priced here: add that fuel bill if your home burns either.

Northern States Power Co - Minnesota sold 15.9% of South Dakota's 2024 residential electricity, NorthWestern Energy - (SD) 10.8%.

South Dakota degree days by month
Month	Heating	Cooling
Jul 2025	16	269
Aug 2025	36	216
Sep 2025	98	108
Oct 2025	408	27
Nov 2025	807	0
Dec 2025	1,192	0
Jan 2026	1,353	0
Feb 2026	925	0
Mar 2026	781	2
Apr 2026	604	8
May 2026	281	62
Jun 2026	71	143

StateCalc Team

Editorial Team

The StateCalc team builds free financial calculators using data from official government sources including the IRS, U.S. Census Bureau, BLS, and state revenue departments. All formulas are validated by an automated test suite and cross-referenced against published data.

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