Your 2018 Volkswagen Passat diesel is sitting in the driveway. You just paid €95 to fill it. And you're wondering if the lad down the road with the Hyundai Ioniq 6 is quietly winning.
He might be. But it depends on numbers most articles never actually run.
What Diesel Actually Costs You Right Now
Pump prices in Ireland have been all over the place. Diesel hit above €1.90 per litre during the 2022 energy spike, dipped back, then crept up again through 2024 as global supply stayed jittery. As of mid-2024, you're typically looking at €1.65 to €1.75 per litre at most forecourts, depending on where you fill up and whether you're on a motorway service station (always worse, always).
Take a realistic Irish annual mileage of 20,000km. A 2018 Passat 2.0 TDI averaging 6 litres per 100km burns through 1,200 litres a year. At €1.70 average, that's €2,040 in fuel alone. Before you've touched tax, insurance, or the service that's three months overdue.
Then there's the structural stuff. Diesel vehicles carry a higher motor tax band in most cases, and if you've looked at how Irish car tax bands actually work, you'll know the emissions-based system doesn't favour older diesel. Particulate filter issues, AdBlue top-ups, and the DPF warning light that appears every time you only do school runs. Diesel was brilliant for long-haul commuters. That was its lane. A lot of Irish drivers are no longer in that lane.
What EV Charging Actually Costs You Right Now
This is where it gets complicated. Because "cheap to charge" was easier to say two years ago.
Home charging on a standard ESB night rate runs roughly €0.10 to €0.14 per kWh depending on your tariff. A Hyundai Ioniq 6 with a 77.4kWh usable battery costs around €8 to €11 to charge from nearly empty. It'll do 450km on a good day in Irish conditions. That's roughly €2.00 to €2.50 per 100km. Compare that to the Passat's €10.20 per 100km at €1.70 diesel. The gap is real and it's big.
Public charging is the catch. Charge point operators have been updating their tariffs upward through 2024. ESB ecars AC chargers now run around €0.37 per kWh for non-subscribers. Ionity rapid chargers are higher again. If you rely entirely on public charging because you live in an apartment or a terrace without a driveway, you're already paying more than EV owners with home charging access. That's not a small caveat. For some people it changes the maths entirely.
Assume a 70/30 home-to-public charging split, which is realistic for someone with a driveway doing a mixed commute and occasional longer runs. Blended cost lands around €0.22 per kWh. The Ioniq 6 now costs you roughly €4.70 per 100km. Still less than half the Passat's fuel bill.
The Numbers Side by Side
Let's use two real-world vehicles. A 2021 Skoda Octavia 2.0 TDI diesel, which you can find on the used market for around €28,000. And a 2022 Hyundai Ioniq 6 Standard Range, coming in around €35,000 used or new with the SEAI grant applied.
Annual fuel or charging cost (20,000km):
- Octavia diesel: approx. €2,200
- Ioniq 6 (blended charging): approx. €940
Annual saving with EV: €1,260.
Close the €7,000 purchase price gap in just over five and a half years on fuel alone. Add in lower servicing costs (no oil, no filter, no timing belt, fewer brake pad replacements due to regenerative braking) and that gap tightens further. The RSA and SEAI have both flagged that EV total cost of ownership is increasingly competitive at the three to five year mark, especially for drivers doing above average mileage.
Motor tax is also a factor. EVs pay €120 per year flat. That Octavia, registered post-2020 on a CO2-based system, sits in a band that typically runs €200 to €390 depending on exact emissions figures.
Where the Maths Breaks Down
EVs win on running costs. Full stop. But there are legitimate reasons the switch doesn't make financial sense for everyone right now.
Low annual mileage. If you're doing 8,000km a year, the fuel saving is around €500. The purchase price premium takes longer to recover. You might be better holding the diesel.
No home charging. This is the biggest real-world snag. If you're parking on a street and relying on public chargers, your cost per 100km climbs significantly. The savings are still there but they're smaller and less predictable.
Short ownership horizon. Buying an EV to sell it in two years makes the numbers harder to justify. The used EV market is still finding its floor on residual values, though that's stabilising.
Battery anxiety on older used EVs. A 2019 Nissan Leaf with 80,000km might have lost meaningful battery capacity. Always check the state of health. This isn't the same as buying a used diesel where worn is worn.
When Switching Actually Makes Sense
Do this maths on yourself. You probably commute 25,000km a year in a 2017 diesel that needs a service and has an NCT due. You have a driveway. You're looking at a Renault 5 E-Tech or a Ioniq 3 in the €25,000 to €30,000 bracket with the SEAI grant.
The fuel saving alone clears €1,400 a year. Servicing drops. Motor tax drops. Insurance might be marginally higher on a newer EV, but you're comparing a seven-year-old car to a new one so that's partly age-related anyway.
For that driver, switching now makes financial sense. Not aspirational sense. Actual financial sense.
The driver doing 9,000km a year in a nearly paid-off 2019 Hyundai Tucson diesel with a working DPF and a clear NCT? Hold on. Run it another couple of years. The EV market in Ireland is still expanding, charging infrastructure is improving, and entry prices are falling as more affordable EVs land on Irish forecourts.
The Honest Summary
Diesel isn't dead. It's just expensive, increasingly unpredictable at the pump, and losing its natural constituency as Irish driving patterns shift toward shorter urban trips.
The EV case is strong for anyone doing real mileage with home charging. It gets messier without a driveway, on a tight purchase budget, or with a low-mileage lifestyle.
That €95 fill you just did on the Passat? Do it roughly 22 more times this year. That's the actual cost you're measuring against.
