Running cost is where the EV/diesel argument gets honest. Sticker prices favour diesel; running costs favour EVs by a country mile if you home-charge, and roughly even if you don't. The shape of the case for any given buyer comes from how their mileage, charging access, and hold period interact. Here are the numbers in euro for 2026 conditions.
Headline annual running cost
Indicative figures for a typical Irish year of 14,000 km. Sources at the bottom of the page.
| Cost line | BEV (home charged) | BEV (public only) | PHEV (mixed) | Diesel hatch |
|---|---|---|---|---|
| Fuel / electricity | €480 | €1,650 | €1,180 | €1,820 |
| Motor tax | €120 | €120 | €140 | €270 |
| Insurance (avg) | €640 | €640 | €610 | €560 |
| Service & maintenance | €220 | €220 | €360 | €420 |
| NCT (averaged) | €28 | €28 | €28 | €28 |
| Tyres (averaged) | €150 | €150 | €145 | €140 |
| Indicative annual total | €1,638 | €2,808 | €2,463 | €3,238 |
The home-charged BEV beats a comparable diesel by roughly €1,600/year at typical Irish mileage. Over five years that's €8,000 of running cost — comfortably bigger than the sticker-price gap on most equivalent cars in the €25k–€45k bracket. Public-only charging closes the gap to about €430/year — still positive for the EV but no longer dramatic.
Charging cost in detail
EVs use roughly 15–20 kWh per 100 km in real Irish conditions (a small hatch sits at the lower end, a big SUV at the upper). Across 14,000 km that's about 2,400 kWh of electricity per year.
- Home, night-rate (~€0.18/kWh average across the year): 2,400 × €0.18 = €432. Round up to ~€480 with a few kerbside top-ups.
- Home, day-rate flat (~€0.36/kWh): 2,400 × €0.36 = €864. Switching to a smart-meter night-rate is the single biggest EV running-cost decision you make.
- Public-only mix (~€0.50/kWh weighted across AC/DC and operators): 2,400 × €0.50 = €1,200, plus the occasional €0.65/kWh DC charge. Round to €1,650.
Diesel comparison at €1.69/litre and 6.0 l/100 km consumption: 14,000 km / 100 × 6.0 × €1.69 = €1,420. We've shown €1,820 above to reflect the typical Irish-conditions consumption (more like 6.7 l/100 km in winter and traffic) and pump-price drift over a full year.
Motor tax and VRT
BEVs pay a flat €120/year motor tax. Diesel motor tax depends on CO2 emissions; a typical 2018–2022 diesel hatch lands at €200–€330 annually. PHEVs vary; expect €120–€180 depending on type-approval CO2 figure.
VRT relief on BEVs (up to €5,000 off the VRT bill) is already baked into the price you see at the dealer; you don't claim it separately. The relief tapers above €40,000 OMSP and disappears above €50,000 OMSP, which is why list prices on premium BEVs jump sharply at those thresholds.
Insurance
EV insurance has compressed the premium difference vs ICE in 2025–2026, but it's not yet identical. Sample insurer quotes (35-year-old driver, full no-claims, Dublin postcode, 15,000 km/year):
| Vehicle | Indicative annual premium |
|---|---|
| Tesla Model 3 (2022, €38k value) | €680 |
| Hyundai Ioniq 5 (2023, €42k value) | €640 |
| VW ID.3 (2022, €28k value) | €560 |
| Renault Megane E-Tech (2023, €32k value) | €590 |
| VW Golf TDI (2022, €24k value) | €510 |
Quotes vary wildly by insurer, postcode and history. Always run three quotes (Aviva, AXA, Liberty/123.ie or An Post) before signing a renewal — the spread on the same EV can easily be €200–€350 between insurers.
Service & maintenance
EVs are mechanically simpler. No engine oil, no DPF, no timing belt, no alternator, no starter motor in the conventional sense. Annual service typically runs €180–€260 for routine items (cabin filter, brake fluid every two years, coolant every five). Compare to a diesel hatchback at €320–€520 annual service averaged across the hold period.
Brake pads last roughly twice as long on an EV because regenerative braking does most of the deceleration. Tyres wear about 10–15% faster because EVs are heavier; we've reflected that in the table above.
Depreciation
Depreciation is where buyers most often get the maths wrong. Some quick anchors:
- Strong residuals (BEV): Tesla Model 3 / Y, Hyundai Ioniq 5 / 6, Kia EV6, Polestar 2, Audi Q4 e-tron. Typical 3-year residual: 55–65% of new.
- Average residuals: VW ID.3 / ID.4, Renault Megane E-Tech, Skoda Enyaq, Cupra Born. Typical 3-year residual: 48–55%.
- Weak residuals: Older Nissan Leaf (small battery), Renault Zoe, BYD Atto 3 (still new to the Irish market — jury's out), early MG ZS EV. Typical 3-year residual: 38–48%.
Diesel residuals have softened since 2024 as the market priced in the move to BEVs and the Dublin LEZ proposals. Strong segments (large estate diesels, big-towing pickups) are holding up; small-to-mid diesel hatches are dropping faster than equivalent BEVs.
The "buy used BEV" case
For a buyer who has home charging and isn't fixed on having a new car, the strongest TCO play in 2026 is a used 2022–2023 BEV with verified battery state-of-health and 60–75 kWh of usable battery. You skip the worst of the depreciation curve and inherit the running-cost advantage. See the used EV buying guide for the inspection checklist.
Sources
- SEAI EV grant rules and home-charger grant: seai.ie
- Public charging tariffs: ESB eCars, Easygo, Ionity and Applegreen Electric public price lists, April 2026.
- Electricity unit rates: ESB Networks PSO data and supplier-published night-rate tariffs, April 2026.
- Diesel pump price: CSO weekly fuel-price publication, average for January–April 2026.
- Motor tax bands: motortax.ie.
- Insurance quotes: live quotes run on Aviva, AXA, Liberty Insurance and An Post Insurance, April 2026.