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Hi Anne,

It will depend on the make, model and year. Motor tax is calculated based on the car’s CO₂ emissions, and that’s specific to each individual model. Unless of course it’s a pre-2008 car, in which case tax for a 1.2-litre engine is €330 per year.

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Hi Michael,

OK, the NOx charge seems still to be something of an inexact science, not least because accurate NOx values are still hard to come by for some models. Now, we think that a 2010 Octavia 1.6 TDI has NOx emissions of 152mg/km, which would equal a NOx charge of €1,725 (€5 per mg for the first 60mg, €15 per mg between 60 and 80mg, and then €25 per mg per the balance: €300 + €300 + €1,125 = €1,725). That’s on top of the normal VRT charge, of course. 

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Hi Jason,

Sadly, it matters not what you paid for it, but what the car would be worth here in Ireland. A 2009 Micra is going to be worth around €3,500 on the Irish market (assuming it's in excellent condition with a full service history) and that model has CO₂ emissions of 139g/km. That puts it in VRT Band B3, which means you have to pay 19 per cent of the Irish market value, which would work out at roughly €665.

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HI Niall,

Yeah, that sounds wrong to us. The highest emissions figure we can find for a 2016 Kuga is 140g/km, which would result in tax of €280, and that would be for the range-topping 180hp version with four-wheel drive and an automatic gearbox. However, €710 is EXACTLY the motor tax you’d pay on a 2.0-litre engine if the car was previously registered as a commercial vehicle and then taxed as a private car. Maybe check and see if that’s the case?

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Hi Stephen,

If it’s a full LPG conversion — i.e. the entire petrol fuel system has been removed and replaced — then there may be some way of applying for a lower VRT rate. Revenue doesn’t currently allow for LPG in its NOx ratings, and the likelihood is that if the car is still capable of running on petrol, then it will still be charged at the normal rate.

The really tricky part is the acceptance of the figures. In theory, Revenue will only accept the NOx figure taken from the car’s original Certificate Of Conformity, which obviously won’t cover any later conversions. I think the first thing to do is to get every scrap of papwerwork relating to the LPG conversion, and then have a long chat with your local motor tax office. 

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Hi Francis,

It’s actually pretty brilliant — that 1.6 iDTEC engine is one of the best diesels we’ve ever sat behind. It’s smooth, has plenty of performance and is very economical. Plus, Honda engines were never implicated in any diesel emissions cheating, so your conscience can remain untroubled. The rest of the car is rather lovely too. Honda’s quality is a given and that generation of Civic is both massively roomy and massively versatile with those clever flip-up ‘Magic’ rear seats. It’s also good to drive — not as agile as a Ford Focus, but solid and planted, with nice steering feel and good comfort levels, too. The only demerits are a bit too much road noise and a slightly messy dashboard layout.

Read our review of the 2013 Honda Civic i-DTEC here

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Hi David,

Well, regular (as in non-PSV) car tax is worked out on the CO₂ emissions. As yours is a Superb 1.6 TDI Greenline, that has official CO₂ emissions of 114g/km, and so will cost you €200 a year to tax.

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Hi Marlon,

It’s not a classic yet, I’m afraid. To qualify for ’vintage’ status (as Revenue erroneously insists on using), a car has to be at least 30 years old, so the youngest BMW Z3s won’t start to qualify until 2025. Calculating a VRT value for one is tricky, as prices and values are massively variable according to condition. I would think that a value of around €6,000 sounds about right, which could mean as much as €2,100 in VRT terms given that the 2.0i auto is in the highest band for VRT with CO₂ emissions above 225g/km. That’s just a guess though — Revenue is notoriously awkward about valuing cars that are less common.

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Hi Mark,

The government knows the emissions of each vehicle simply because each vehicle is put through a series of official laboratory tests as part of the process of homologation — the legal process whereby a car is pronounced as passed for sale to the public - and that data is made available by the car manufacturers. As for which is cheaper to tax, it’s down to the CO₂ emissions and we’d have to know which make and models you’re looking at before we could give you a precise answer, but in most cases, for a given car, the diesel would have lower CO₂ emissions and hence motor tax.

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Hi Tomas,

Well, the NOx tax isn’s about the size of the engine, it’s about the NOx emissions, which are not specifically related to the size. It could be worth getting on to the Japanese Ministry of Land, Infrastructure, Transport and Tourism, who may be able to provide you with a specific NOx figure for the car you’re talking about, but otherwise, just be thankful it’s not a diesel — those are subject to a maximum €4,850 extra in NOx tax if you can’t provide an accurate figure.