Wondering if you should switch from heating oil to natural gas?

"# Heating Oil vs. Natural Gas: Cost Comparison for 2025

If you're trying to decide between heating oil and natural gas—or considering switching from one to the other—cost is likely your primary concern. Let's break down the real numbers to help you make an informed decision.

The Bottom Line Up Front

Based on current 2024-2025 pricing in the Northeast:

Natural gas is typically 30-40% cheaper than heating oil for home heating. However, the cost to convert from oil to gas ($5,000-$15,000+) means oil users should carefully evaluate whether switching makes financial sense.

Current Price Comparison

Here are the approximate costs per unit of heat delivered (as of early 2025):

Heating oil: $32-37 per million BTU - Based on $3.70-4.20/gallon and 85% furnace efficiency - Prices vary significantly by region and season

Natural gas: $18-25 per million BTU - Based on $1.80-2.50/therm and 90% furnace efficiency - Prices more stable but include delivery charges

What this means: For every million BTU of heat, natural gas costs about $10-15 less than heating oil.

Annual Heating Cost Estimates

For a typical 2,000 square foot home in the Northeast:

Heating Oil - Annual usage: 700-900 gallons - Average cost at $3.90/gallon: $2,730-3,510/year

Natural Gas - Annual usage: 800-1,000 therms - Average cost at $2.00/therm: $1,600-2,000/year

Potential annual savings with natural gas: $900-1,500

Note: These are estimates. Actual costs depend on home size, insulation, thermostat settings, winter severity, and local prices.

Why Is Natural Gas Cheaper?

Several factors make natural gas less expensive:

Abundant domestic supply: The U.S. produces large quantities of natural gas, keeping prices relatively low.

Pipeline delivery: Once infrastructure is in place, piped delivery is cheaper than truck delivery.

Price stability: Natural gas prices fluctuate less than oil prices, which are tied to global crude markets.

Efficiency advantages: Modern gas furnaces often achieve 90-95% efficiency vs. 80-85% for oil furnaces.

Hidden Costs to Consider

For Heating Oil

Delivery fees: Some companies charge $25-50 for small deliveries Tank maintenance: Annual inspections, cleaning every 3-5 years Tank replacement: $2,000-4,000 every 15-25 years Service contracts: $150-300/year for furnace maintenance

For Natural Gas

Monthly service charges: $10-25 even if you use minimal gas Infrastructure fees: Built into your bill, can't be avoided Initial connection cost: If gas isn't already in your home Conversion costs: Discussed in detail below

The Cost of Converting from Oil to Gas

If natural gas is available in your area, here's what conversion typically costs:

Gas line installation to home: $0-3,000 - Many utilities install the line to your property free or at low cost - Costs increase if the gas main is far from your home

New gas furnace/boiler: $3,500-8,000 - High-efficiency models cost more but save money long-term - Installation labor included

Gas line installation inside home: $500-1,500 - Running pipe from meter to furnace location

Oil tank removal: $500-2,500 - Underground tank removal costs significantly more - May require soil testing

Total conversion cost range: $5,000-$15,000

Payback period: Based on $900-1,500 annual savings, conversion pays for itself in 3-10 years.

When Heating Oil Makes Sense

Natural gas unavailable: Many rural areas don't have gas lines.

Short-term ownership: If you're selling soon, conversion won't pay off.

New oil equipment: If you just installed a new oil furnace, wait until it needs replacement.

High conversion costs: If your home requires expensive gas line work, oil may remain cheaper.

Oil price advantages: Occasionally oil prices drop significantly below gas on an equivalent basis.

Regional Price Variations

Heating costs vary significantly by location:

Northeast (NY, MA, CT, PA) - Heating oil: Very common, competitive pricing - Natural gas: Available in most urban/suburban areas, significant savings

Mid-Atlantic (MD, DE, VA) - Mix of both fuels - Natural gas generally cheaper but less price difference

Midwest - Natural gas dominates - Heating oil rare and often expensive

Other Heating Fuel Options

For comparison, here are costs for alternative heating fuels:

Propane: $35-45 per million BTU (similar to or higher than oil) Electricity (resistance heat): $45-55 per million BTU (most expensive) Heat pumps: $15-25 per million BTU (competitive with gas, but high installation cost) Wood pellets: $25-30 per million BTU (requires work and storage)

Making Your Decision

Choose Natural Gas If: - Gas lines are available on your street - You plan to stay in your home 5+ years - Your oil furnace is old and needs replacement soon - You want stable, predictable heating costs - Environmental concerns matter to you (gas produces less CO2 than oil)

Stick with Heating Oil If: - Natural gas isn't available in your area - You have a newer oil furnace - Conversion costs are prohibitively high - You're selling your home soon - You can buy oil strategically to minimize costs

Tips for Oil Users to Minimize Costs

If you're staying with oil, maximize savings:

1. Buy during low-price seasons (summer/early fall) 2. Keep your tank full to avoid premium emergency pricing 3. Get multiple quotes from different suppliers 4. Consider a high-efficiency oil furnace when replacing equipment 5. Improve home insulation to reduce overall usage 6. Use programmable thermostats to avoid heating empty rooms

The Environmental Factor

While not purely about cost, it's worth noting:

Natural gas produces about 25% less CO2 than heating oil per BTU of heat. It also produces fewer particulates and sulfur emissions.

Heating oil has improved significantly with low-sulfur formulations and high-efficiency furnaces, but still has a higher carbon footprint.

Future consideration: Some states are considering carbon taxes or restrictions that could change the cost equation.

Conclusion

Natural gas is generally cheaper for home heating than oil—often by $900-1,500 per year. However, the upfront conversion cost means it takes several years to break even.

If natural gas is available in your area and you plan to stay in your home for 5+ years, conversion usually makes financial sense. If gas isn't available or you have a newer oil system, optimizing your oil purchases and improving efficiency are your best strategies.

The most important factor? Run the numbers for your specific situation. Contact local HVAC contractors for conversion quotes and compare them to your actual heating oil costs—not generic estimates."