Last updated: 6 October 2026 (Budget 2027 carbon tax cut)
Heating oil prices in Ireland are averaging around €1,369 for 1,000 litres of kerosene as of late August 2026 - up roughly 3.6% on the month, with a county-by-county spread of €40 or more on the same fill. For the roughly 680,000 Irish homes heated by oil, timing and tactics genuinely matter: the gap between a well-bought summer fill and a panic-bought January one can run to hundreds of euro a year. This guide covers today's guide price, why your neighbour pays less, the carbon tax in every litre (cut in Budget 2027), and the practical playbook for paying less - this year and permanently.
⚡ Quick Summary
🌿 Guide price (August 2026): around €1,369 per 1,000 litres nationally - county averages range roughly €1,355-€1,395, and prices move daily.
🌿 Buy big, buy in summer: 1,000L costs less per litre than 500L, and prices are typically softest outside the heating season.
🌿 Carbon tax cut: Budget 2027 (6 October 2026) cuts carbon tax on heating oil from €63.50 to €48.50 per tonne of CO₂ and freezes it for the rest of this government's term. That takes about €40 off a 900-litre fill and leaves roughly 14c of carbon tax in every litre.
🌿 A typical home burns 1,500-2,000L a year - about €2,000-€2,750 at today's prices.
🌿 Shop locally, every time: comparison sites and a few phone calls routinely find €30-€60 off a fill.
🌿 The permanent fixes: insulation, heating controls (€700 grant) and - for the long run - the €12,500 heat pump grant.
💶 What Is Heating Oil Costing Right Now?
At the time of writing (20 August 2026), the national average for kerosene is about €1,369 per 1,000 litres, roughly €1.37 per litre. Twelve months of movement have been choppy: down through spring, then climbing again through summer - up about 3.6% in the last month alone as global markets firmed.
Two structural patterns are worth knowing:
🌿 Location matters: oil tends to be cheaper around cities and dearer in remote areas - the spread between the cheapest and dearest counties is typically €40 on a 1,000L fill, and has historically reached €150.
🌿 Volume matters: a 500L order costs meaningfully more per litre than 1,000L. If cash flow allows, fill big; if not, an oil-buying club or a split order with a neighbour captures most of the discount.
Prices change daily - always check a live comparison site or ring two or three local suppliers before ordering.
🔹 Work Out What Your Next Fill Will Cost
Pick your tank size, how much is left and the price you have been quoted, and the estimator below shows the litres you need, the cost, roughly how many winter weeks that buys you, and how much of it is carbon tax.
Indicative estimates only. Uses the price you enter; the default (€1,365 per 1,000 L, national average, 31 August 2026) moves daily and varies €40 or more between counties. Small orders (500 L) typically cost a few cent per litre more than 1,000 L. "Weeks of heating" assumes about 70% of annual oil is burned in the six coldest months. Carbon tax share is approximate (€48.50 per tonne of CO₂ on heating oil after the Budget 2027 cut, roughly 14c per litre including VAT). Always compare a few local quotes before ordering.
📈 Why Heating Oil Keeps Getting More Expensive
🌿 Global wholesale: kerosene tracks crude and refined-product markets - the biggest driver, and the one nobody controls.
🌿 Carbon tax: Budget 2027 on 6 October 2026 cut the rate on home heating oil and gas from €63.50 to €48.50 per tonne of CO₂. The rise to €71 that had been put off to 14 October 2026 is cancelled, and Minister for Finance Simon Harris said the rate will not go up again during this government's term. On kerosene, €48.50 a tonne is roughly 14c per litre including VAT, about €139 of a 1,000L fill. Revenue has not yet published the date the lower rate starts. Our carbon tax guide has the full Budget 2027 changes.
🌿 The euro and delivery costs: oil is dollar-priced, and rural drops cost more to serve.
The direction of travel is one-way: policy is designed to make fossil heating progressively dearer while funding the alternatives - which is exactly why the escape routes below carry grants.
🧭 The Pay-Less Playbook
🌿 Time the fill: buy in late spring/summer when demand is lowest; never let the tank run low going into December, when you have no negotiating position.
🌿 Compare every order: loyalty is expensive - a five-minute compare of local suppliers routinely saves €30-€60 per fill.
🌿 Join or form an oil club: group-buying with neighbours gets 1,000L+ pricing on smaller individual orders.
🌿 Service the boiler annually: an €80-€120 service keeps efficiency up - a neglected boiler quietly burns 5-10% more oil.
🌿 Claim the €700 controls grant: zoning, thermostatic radiator valves and a proper timer typically cut fuel use 10-20% - the one SEAI grant that works with your existing oil boiler.
🌿 Fix the fabric: a house that leaks heat burns oil twice - the attic and wall insulation grants cover most of the cost for many homes.
🌿 Watch the tank itself: a locked, inspected tank protects against leaks and increasingly common oil theft.
🌱 The Alternatives Creeping Up on Kerosene
🌿 HVO and blends: renewable HVO fuel runs in a converted oil boiler (~€400 conversion) and cuts lifecycle emissions up to 90%, but costs more per litre. The Government said in Budget 2027 it is talking to the European Commission about better tax treatment for HVO.
🌿 The heat pump route: up to €12,500 in grants to leave oil entirely - typical running costs beat oil for most suitable homes. See our heat pump guide and boiler replacement options.
🌿 Free upgrades: on Fuel Allowance? The Warmer Homes Scheme upgrades qualifying oil-heated homes at no cost.
⚠️ Common Mistakes to Avoid
🌿 Panic-buying in a cold snap: December-January demand spikes are when prices and delivery waits peak - autumn is your deadline.
🌿 Small repeat orders: three 300L emergency drops cost far more than one planned 1,000L fill.
🌿 Never comparing: the same litre can vary €40+ between suppliers serving the same townland.
🌿 Running the tank dry: sludge from the tank bottom clogs filters and can mean a service call on top of an urgent order.
🌿 Thinking the carbon tax cut fixes oil costs: the Budget 2027 cut saves about €40 a fill, but kerosene prices still move by hundreds of euro a year, and a future government could restart carbon tax rises.
❓ Frequently Asked Questions
🔹 How much is 1,000 litres of heating oil in Ireland?
Around €1,369 on the national average in late August 2026, with county averages spanning roughly €1,355-€1,395. Prices move daily - always check a live comparison before ordering.
🔹 When is the cheapest time to buy heating oil?
Typically late spring and summer, when demand is at its lowest. Buying ahead of the heating season also protects you from cold-snap price spikes and delivery delays.
🔹 How long does 1,000 litres of heating oil last?
A typical three-bed home burning 1,500-2,000L a year gets roughly 6-8 months from 1,000L across the shoulder and winter seasons - heavy winter use can burn 10-15L a day.
🔹 Why is heating oil cheaper in some counties?
Supplier density and delivery distance. Areas near cities and depots see more competition; remote areas pay more per drop - a spread that has reached €150 per 1,000L historically.
🔹 How much of the price is carbon tax?
About 14c per litre including VAT at the new €48.50 per tonne rate, or roughly €139 of a 1,000L fill. Budget 2027 cut the rate from €63.50 and froze it for the rest of this government's term.
🔹 Is it worth switching away from oil?
For suitable homes, yes over time: the €12,500 heat pump grant and cheaper running costs still make the case, even after the Budget 2027 cut to carbon tax on oil. Until then, insulation, controls and smart buying cut the oil bill you do have.
📚 Related Guides
🌿 Heat Pumps
🌿 Air-to-Water Heat Pump Cost
🌿 Air-to-Air Heat Pumps
🌿 Heating Oil by County
🌿 HVO Fuel
🌿 Boiler Replacement Cost
🌿 Gas Boiler Service
🌿 Storage Heaters
🌿 Underfloor Heating
👉 All guides and calculators
Climate Jargon Buster is an independent resource providing plain-English information on climate, energy and sustainability topics for an Irish audience. Oil prices shown are national guide averages at the time of writing and change daily - confirm live prices before ordering; grant amounts are correct as of August 2026 and are set by the SEAI. For official grant terms, visit seai.ie. This site is not affiliated with SEAI or any fuel supplier.