Oil vs Gas vs Electric Heat: Which Costs More to Run?
Homes are commonly heated using oil, natural gas, or electric heat. While all three systems produce warmth, the way they are priced and billed leads to very different seasonal costs. Below is a factual comparison of oil, gas, and electric heating using the same assumptions and heating season length.
Heating season used for comparison
To keep this comparison consistent, all examples below assume:
A 5-month heating season
Typical residential usage
Realistic fuel and electricity prices
Actual costs vary by home, but this allows for a clean, apples-to-apples comparison.
Fuel prices used
Heating oil: $4.00 per gallon
Natural gas: $1.50 per therm
Electricity: $0.20 per kWh
Seasonal heating cost comparison
Oil heat
Typical usage: 2–4 tanks per season
Tank size: 275 gallons
Cost per tank: ~$1,100
Seasonal cost
$2,200–$4,400
Electric heat
Typical usage: 8,000–12,000 kWh per season
Electricity rate: $0.20 per kWh
Seasonal cost
$1,600–$2,400
Gas heat
Typical usage: 600–900 therms per season
Gas price: $1.50 per therm
Seasonal cost
$900–$1,350
Average monthly cost during winter
Spread across a 5-month season:
Oil heat: ~$440–$880 per month
Electric heat: ~$320–$480 per month
Gas heat: ~$180–$270 per month
Oil heat has the highest monthly impact due to fuel cost and delivery size. Gas heat is typically the least expensive.
Why the costs differ
Heating cost differences come from:
Fuel price per unit of heat
Billing structure (monthly vs delivery)
System efficiency
Heat loss from the home
Even small efficiency changes can significantly affect seasonal totals.
Cost predictability
Oil: Large, infrequent payments and price volatility
Electric: Predictable monthly bills but sensitive to rate increases
Gas: Monthly billing with relatively stable pricing
The lowest seasonal cost is not always the easiest to budget for.
What this comparison does not include
Equipment installation or replacement
Maintenance and repairs
Supplemental heating sources
Extreme weather years
For a full breakdown of natural gas heating costs, see How much does it cost to heat a home with gas?
We also break down oil heating costs in detail here: How much does it cost to heat a home with oil?
If you’re considering electric heating, we cover those costs here: How much does it cost to heat a home with electric heat?
The bottom line
Gas heat is typically the least expensive way to heat a home over a full season. Electric heat often falls in the middle, while oil heat is usually the most expensive due to fuel pricing and delivery size. The best option depends on fuel availability, system efficiency, and how heating costs are managed over time.