Oil Furnace Installation Cost 2026
An oil furnace costs $6,750 to $10,000 installed. The most expensive fuel type for both installation and operation, oil furnaces are primarily found in the rural Northeast where natural gas is unavailable.
Why Oil Furnaces Cost More
Several factors make oil furnaces the most expensive option.
Equipment is pricier: Oil furnaces use specialized burners and heat exchangers. Equipment alone runs $2,500 to $6,000 compared to $1,500 to $5,000 for gas.
Oil tank required: New above-ground tank: $1,500 to $2,500. Underground tank: $2,000 to $3,000. Annual tank inspection: $100 to $200.
Fuel delivery logistics: Oil must be delivered by truck. Delivery charges, minimum orders, and volatile oil prices add unpredictability to your heating budget.
More maintenance: Oil furnaces need annual tune-ups ($200 to $350) including nozzle replacement, filter changes, and combustion testing. Gas furnaces need less ($100 to $200).
Oil Furnace Operating Cost
Heating oil prices have fluctuated between $2.50 and $5.50 per gallon over the past decade. At current prices around $3.50 to $4.00 per gallon, annual heating costs are substantial.
Converting from Oil to Gas
Many Northeast homeowners are switching from oil to gas. If natural gas is available in your area, the conversion typically pays for itself in 4 to 8 years through lower fuel costs.
| Conversion Component | Cost |
|---|---|
| New gas furnace (installed) | $3,800 - $7,000 |
| Gas line from street to home | $500 - $2,000 |
| Oil tank removal | $1,000 - $3,000 |
| Permits and inspections | $200 - $400 |
| Total conversion cost | $5,500 - $12,400 |
Annual savings of $800 to $1,800 in fuel costs means the conversion pays back in 4 to 8 years. After that, you save every year for the life of the furnace.
Oil Tank Considerations
Above-Ground Tanks
- Cost: $1,500 to $2,500 for 275-gallon tank
- Lifespan: 15 to 20 years
- Easier to inspect for leaks
- Removal cost: $500 to $1,000
- Most common in basements or garages
Underground Tanks
- Cost: $2,000 to $3,000 installed
- Lifespan: 15 to 25 years (steel), 30+ years (fiberglass)
- Hidden from view but hard to inspect
- Removal cost: $1,500 to $3,000
- Environmental liability if leaks contaminate soil
Important:
Underground oil tank leaks can create serious environmental liability. Soil remediation costs $10,000 to $50,000 or more. If you have an underground tank, consider upgrading to above-ground or switching to gas.
Where Oil Furnaces Still Make Sense
Oil furnaces are becoming less common, but they remain the practical choice in some situations.
Rural Northeast without gas mains: Parts of Maine, Vermont, New Hampshire, and rural New York, Pennsylvania, and Connecticut have no natural gas infrastructure. Oil or propane are the main options.
Dual-fuel with heat pump: A modern setup pairs an air-source heat pump with an oil furnace backup. The heat pump handles 70% to 85% of heating hours (mild and moderate days) while the oil furnace kicks in during extreme cold.
Considering alternatives? See our gas furnace guide or heat pump comparison.