Which fuel is cheapest to run in 2026?
For most Irish drivers, an electric car is now the cheapest to run — cheap home charging, €120 motor tax and low servicing costs add up to about €1,201–€1,429 a year less than an equivalent diesel or petrol at 15,000 km, or €1,849–€2,255 a year at 25,000 km. Diesel still makes sense for high-mileage motorway drivers, but for a reason worth being precise about: diesel is now the dearer fuel at the pump (€1.92/L against €1.84/L for petrol), so its advantage rests entirely on burning less. It needs roughly 2,200 km a year before the fuel it saves covers its higher servicing costs — below that, petrol is the cheaper combustion choice, and usually the cheaper car to buy. The calculator above settles it for your own mileage and charging split, and even shows your break-even point.
Buying a new EV? State support comes to as much as €6,600 via the SEAI grant, VRT relief and €300 home charger grant in 2026 (the ICE2EV scrappage top-up is currently closed, fully subscribed) — work out your figure with the EV grant calculator. Importing a car? Estimate the tax with the VRT calculator. Want your exact annual figure rather than the typical range above? Use the motor tax calculator, and check what your current car is worth with our free valuation tool.
Frequently asked questions
How much does it cost to run a car in Ireland per year in 2026?+
A typical mid-size car driven 15,000 km a year costs between about €1,815 and €3,244 a year to run once you add fuel or electricity, motor tax, insurance, servicing and tyres — before depreciation, which is usually the single biggest cost of all. An electric car charged mostly at home sits at the bottom of that range (about €1,815) thanks to cheap energy and €120 motor tax; petrol sits at the top (about €3,244) and diesel just under it (about €3,016). Drive 25,000 km a year and a petrol car passes €4,440. Older, higher-CO₂ cars cost more again, mostly through motor tax.
What is the cheapest type of car to run in Ireland?+
For most drivers an electric car is now the cheapest to run in 2026 — lowest motor tax (€120), cheap home charging and low servicing costs. Diesel is no longer the cheaper fuel at the pump: it is €1.92 a litre against €1.84 for petrol. Its case now rests purely on burning less — about 5.3 litres per 100 km against 6.5 — so diesel only beats petrol above roughly 2,200 km a year, the point where the fuel it saves covers its higher servicing costs. Below that, petrol is the cheaper combustion choice. The EV vs petrol vs diesel calculator on this page works out which is cheapest for your mileage and charging pattern.
How much is motor tax in Ireland in 2026?+
Motor tax for cars registered since 2008 is based on CO₂ emissions. A battery-electric car pays the lowest band at €120 a year. A typical modern petrol or diesel pays roughly €190–€200, while older, higher-emitting cars can pay €600 or more. Plug-in hybrids are typically €140–€170 for a 2021-or-later registration, depending on their exact CO₂ rating. The exact figure depends on your car’s CO₂ rating and registration year.
Is it worth switching to an electric car to cut running costs?+
For most Irish drivers, yes — the energy, tax and servicing savings come to about €1,201–€1,429 a year at 15,000 km, and about €1,849–€2,255 at 25,000 km, against an equivalent diesel or petrol. Whether that pays back depends on the purchase price and how long you keep the car, which the calculator on this page works out over 3 and 5 years. Buying new, State support adds up to about €6,600 at best in 2026 — a €3,500 SEAI grant, €2,800 of VRT relief (its €5,000 headline is a ceiling no car reaches, because relief cannot exceed the 7% VRT due) and the €300 home charger grant.
How much does it cost to charge an electric car vs filling a tank?+
On a home night EV tariff of about €0.10 per kWh, charging an EV costs roughly €1.85 per 100 km. A petrol or diesel car costs roughly €10–€12 per 100 km (petrol €1.84 a litre, diesel €1.92 — AA Ireland August 2026 survey, verified 1 September 2026). Diesel is the dearer fuel per litre now, but burns less, so it still works out cheaper per kilometre than petrol. Over 15,000 km a year the fuel-cost gap to a home-charged EV is about €1,249–€1,517.