Heating cost, South Carolina
What It Costs to Heat a Home in South Carolina This Winter (2026-27)
Short answer: heating a typical 2,000 sq ft home in South Carolina costs about $571 a year with the cheapest option, a natural gas furnace, and about $1,674 with the most expensive, a heating oil boiler. Heating oil runs $1,674 and propane $1,389.
By Marcus Reed. Updated Nov 3, 2026. Part of our heating cost by state study.
Yearly heating cost in South Carolina, by system
| System | South Carolina a year | US average | Fuel used |
|---|---|---|---|
| Natural gas furnaceCheapest95% AFUE | $571 | $831 | 350 therms |
| Air-source heat pump8.1 HSPF2 | $614 | $1,138 | 4,105 kWh |
| Propane furnace95% AFUE | $1,389 | $1,631 | 383 gallons |
| Electric resistance100% | $1,458 | $2,702 | 9,745 kWh |
| Heating oil boiler85% AFUE | $1,674 | $2,788 | 282 gallons |
Estimates for one reference home: 2,000 sq ft, average insulation, a normal winter. Equipment, maintenance, fan and pump electricity and tank rental are not included.
How South Carolina compares
South Carolina ranks 44th most expensive of 50 places with a real heating season when each uses its cheapest option, and 44th for a gas furnace. Its gas figure of $571 is 31% below the US average of $831.
The climate explains part of it. South Carolina averages 2,639 heating degree days a year (1991-2020 normal, weighted by where people live), 62% of the contiguous US figure of 4,230, so the same house needs 33.3 million BTU of heat a winter against 53.3 nationally. The rest is prices: electricity at 15.0 cents per kWh against a US average of 17.3, and the fuel prices below.
Is a heat pump worth it in South Carolina?
On running cost alone, an air-source heat pump costs $614 a year here. That is $1,060 a year less than heating oil, $775 less than propane and $844 less than electric baseboards. A gas furnace is still $43 a year cheaper where gas service is available.
Sizing decides whether a heat pump keeps up. Use our central heat pump size calculator for a ducted house or the mini-split calculator room by room.
Prices used for South Carolina
- Electricity
- 15.0 cents per kWh
- EIA 2025 state average
- Natural gas
- $1.63 per therm
- EIA state average, 2024
- Propane
- $3.63 per gallon
- EIA October 2026, regional average (PADD 1C (Lower Atlantic))
- Heating oil
- $5.93 per gallon
- EIA October 2026, regional average (PADD 1C (Lower Atlantic))
Where the EIA does not publish a South Carolina figure, we use its regional or US average and say so above. The full method and sources are in the main study.
Lowering the bill
- A setback schedule on a smart thermostat trims heating energy by about 8% by ENERGY STAR's estimate, about $46 a year on the natural gas furnace figure here.
- A space heater only saves money if the rest of the house is allowed to cool. At 15.0 cents per kWh a 1,500 W heater costs about $0.22 for each hour it runs on high; see what a space heater costs to run.
- Air sealing and attic insulation lower every number on this page in proportion, because they cut the heat the house needs.
South Carolina heating cost FAQ
How much does it cost to heat a house in South Carolina?
For a 2,000 sq ft home with average insulation in a normal South Carolina winter: $571 with a natural gas furnace, $614 with an air-source heat pump, $1,389 with a propane furnace, $1,458 with electric resistance heat, $1,674 with a heating oil boiler. That uses EIA prices for South Carolina and its 1991-2020 normal of 2,639 heating degree days.
What is the cheapest way to heat a home in South Carolina?
A natural gas furnace, at about $571 a year for our reference home. The next cheapest is an air-source heat pump at $614, and the most expensive is a heating oil boiler at $1,674. If you have no gas line, the choice is usually between a heat pump, propane and oil.
Is a heat pump cheaper than oil or propane in South Carolina?
Yes against oil: about $1,060 a year less. Against propane it saves about $775 a year. That uses a 8.1 HSPF2 heat pump.
How much heating oil or propane does a house in South Carolina use in a winter?
Our 2,000 sq ft reference home needs about 282 gallons of heating oil in an 85% efficient boiler, or 383 gallons of propane in a 95% furnace, in a normal South Carolina winter. Smaller or tighter homes use less; a cold winter uses more in proportion.
Marcus Reed
Founder and Editor, CrunchYourDollars
Marcus Reed builds the sizing tools on CrunchYourDollars. He is a software engineer with a long-running PC hardware and power supply habit, which is where the watts, watt-hours and surge math on this site comes from. Product specs are pulled from manufacturer data sheets, electricity rates from the U.S. Energy Information Administration, and water chemistry rules from the Water Quality Association. He is not a licensed electrician or plumber: the tools show the math and the matching models so you can make the call, and anything involving your electrical panel should be checked by a licensed pro.
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