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 €1,200–€2,000 a year less than an equivalent petrol or diesel. Diesel still makes sense for very high-mileage motorway drivers, and petrol for low-mileage city use where the purchase price is lower. 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, 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 roughly €3,500–€5,500 a year to run once you add fuel or electricity, motor tax, insurance, servicing, tyres and NCT — before depreciation, which is usually the single biggest cost of all. An electric car charged mostly at home sits at the lower end thanks to cheap energy and €120 motor tax; an older high-CO₂ diesel sits at the top.
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 can still win for very high-mileage motorway drivers, while petrol suits low-mileage urban use where the purchase price is lower. 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 €200–€280, 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 typically come to €1,200–€2,000 a year versus an equivalent petrol or diesel. 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 €9–€11 per 100 km at July 2026 pump prices (petrol €1.75, diesel €1.73 a litre — both fell sharply from June). Over 15,000 km a year that is a fuel-cost difference of well over €1,200.