Heating Oil vs Gas Ireland: Which is Cheaper?
Around 40% of Irish homes rely on heating oil, while natural gas serves roughly 35%. If you're wondering which fuel is cheaper — or whether it's worth switching — here's a straight comparison with live data.
Cost Comparison
Side-by-side look at typical annual costs for an average Irish three-bed semi.
Heating Oil
Live National Average (500L)
€864
Updated Sat, 7 Mar, 0:00
Typical Annual Cost
€2,074 – €3,110
Varies by county and when you buy
Standing Charge
None
Natural Gas
Typical Unit Rate
~7–9c/kWh
Depends on supplier and tariff
Typical Annual Cost
€1,200 – €1,600
Based on average 11,000–14,000 kWh usage
Standing Charge
~€90–€120/year
Oil prices vary significantly by location. Right now, Donegal is the cheapest county at €809 for 500L, while Wicklow is the most expensive at €893.
Pros and Cons
Heating Oil
Pros
- +No standing charge — you only pay for what you use
- +Buy when prices are low (summer savings)
- +Available everywhere, including rural Ireland
- +Your tank gives you control over supply
Cons
- −Price is volatile — linked to global oil markets
- −Need a storage tank on your property
- −Must order in advance — risk of running out
Natural Gas
Pros
- +Constant supply — never run out
- +Lower maintenance than oil boilers
- +No storage tank needed
Cons
- −Standing charge of ~€90–€120/year
- −Not available in most rural areas
- −Locked to one network supplier (GNI)
Which Should You Choose?
Rural Ireland: Oil Is Often the Only Option
If you live outside the main towns and cities, chances are the gas network doesn't reach you. The GNI network covers about 700,000 homes, mostly in Dublin, Cork, Galway, Limerick, and Waterford, plus some larger towns. For the rest of the country, heating oil (kerosene) remains the primary fuel for central heating.
The good news: oil prices are competitive, especially if you buy smart. Filling up in summer when demand is low, ordering larger quantities for better per-litre rates, and comparing suppliers can save you €100–€200 per year.
Urban with Gas Access: Convenient, but Not Always Cheaper
If you have a gas connection, you benefit from a constant supply and generally more predictable bills. However, once you factor in the standing charge (€90–€120/year regardless of usage), gas isn't always the cheapest option — particularly for well-insulated homes with lower heating demand.
Gas bills are more predictable month-to-month, which suits people who prefer budgeting with equal payments. Oil, by contrast, means lump-sum payments when you order — but you choose when to buy.
Switching Costs and Considerations
Thinking of switching from oil to gas? Here's what to budget for:
- Gas connection fee: €250–€400 (if the network reaches your road)
- New gas boiler: €2,500–€4,000 installed
- Removing the oil tank: €200–€500
- Total: roughly €3,000–€5,000
At a saving of €100–€300 per year, the payback period is typically 10–30 years. For most homeowners, it only makes sense if you need a new boiler anyway. Alternatively, consider a heat pump — SEAI grants can cover a significant portion of the cost.
Use live local prices
March is typically mid-cycle seasonally, but short-term market shocks can dominate. Prioritize live county quotes and alerts when deciding when to buy.
The current national average for 500L of heating oil is €864. If you're on oil, timing your purchase around seasonal lows could save you €50–€150 per year.
Frequently Asked Questions
Is heating oil or gas cheaper in Ireland?▾
It depends on your usage pattern and location. Natural gas typically costs €1,200–€1,600 per year for an average three-bed semi. Heating oil costs €1,200–€1,800 per year, but you can reduce this by buying in summer when prices drop. Oil has no standing charge, while gas adds €90–€120 per year regardless of usage.
Can I switch from oil to gas in Ireland?▾
Yes, if the Gas Networks Ireland gas network reaches your area. You will need a gas connection (€250–€400), a new boiler (€2,500–€4,000), and potentially tank removal (€200–€500). Total cost is typically €3,000–€5,000. Many rural areas have no gas access.
Why is heating oil still so popular in Ireland?▾
Around 40% of Irish homes use oil because the natural gas network only reaches about 700,000 homes, mainly in cities and large towns. In rural Ireland, oil is often the only practical option aside from solid fuel or heat pumps. Oil also has no standing charge and lets homeowners buy strategically when prices are low.
What is the cheapest way to heat a house in Ireland?▾
Heat pumps are the cheapest to run long-term (2–4 times more efficient than boilers) but require €8,000– €14,000 upfront, offset by SEAI grants of up to €6,500. Among traditional fuels, natural gas is usually cheapest in urban areas. Heating oil can be competitive if you time purchases well. The best approach depends on your home insulation, location, and whether you have gas access.
On oil? Make sure you're getting the best price.
The national average for 500L is currently €864. Check your county page for the most useful local prices near you.