OMSP, CO2 rates, NOx levy, appeal process, and real examples for Irish buyers

By Nobuko Japan Import Team |  Updated: April 2026  |  100+ Irish imports handled since 2014

What Is VRT and Who Pays It

Vehicle Registration Tax is a once-off tax paid to Irish Revenue Commissioners when a foreign car is registered in Ireland for the first time. Every imported car pays VRT. There are no exemptions for private buyers importing from Japan. The only vehicles that fall outside the standard VRT system are classic cars over 30 years old and certain adapted vehicles for disabled drivers.

You pay VRT at an NCTS centre within 30 days of your car arriving in Ireland. If you miss that deadline, penalty charges apply. The car gets Irish registration plates on the same day you pay, and from that point it is a registered Irish vehicle. The process is straightforward when you have the right documents and understand how Revenue calculates the figure before you walk in.

Your Car's VRT: Quick Estimate by Model

Before reading the full formula, check this table first. It gives a fast VRT estimate for the most commonly imported Japanese cars to Ireland. OMSP figures are based on Revenue's typical valuations for these models in 2026 sourced from Irish classifieds and Revenue's own database patterns. Your actual OMSP may differ; this is a planning tool.

The table shows the single most important pattern in Irish VRT: diesel cars pay dramatically more than hybrids. The Toyota Estima diesel at €6,060 total VRT versus the Toyota Aqua hybrid at €855 is not a small difference. It is the difference between a sensible import and an expensive mistake. For any car where a hybrid version exists, the hybrid is almost always the correct choice for Ireland specifically because of VRT. Want to see why hybrids consistently outperform petrol and diesel on Irish VRT? Read our full guide on importing hybrid cars from Japan to Ireland with real landed cost comparisons.

OMSP: The Number That Determines Your Tax Bill

What OMSP Means

Open Market Selling Price is Revenue's estimate of what your car would sell for on the Irish used car market. Revenue does not care what you paid at a Japanese auction. A 2017 Toyota Voxy that cost €4,500 at USS auction in Japan is not a €4,500 car in Ireland. Revenue looks at DoneDeal and CarZone listings for comparable models and assigns a value based on Irish retail prices.If you are planning your first Japanese import, our step-by-step guide to importing a car from Japan to Ireland covers every cost from auction to Irish road.

This is the most important concept in VRT. Buyers who understand it before they bid avoid nasty surprises at the NCTS centre. Buyers who ignore it and assume VRT is calculated on the auction price consistently overspend. On a Toyota Voxy with an Irish OMSP of €10,000, the difference between calculating on the €4,500 auction price and the €10,000 OMSP is the difference between expecting €608 VRT and paying €1,350 VRT. That is a €742 surprise at the window.

How to Research OMSP Before You Bid

The most reliable way to estimate your OMSP is to search for your target model on Irish classifieds before you place a bid at auction. Revenue uses the same data sources. If DoneDeal shows five listings for a 2017 Toyota Voxy between €9,000 and €11,000, Revenue will likely assign an OMSP somewhere in that range. This research takes 15 minutes and removes the biggest source of uncertainty in your VRT estimate.

Revenue also provides a VRT calculator at ros.ie through the Revenue Online Service. The calculator gives a rough estimate based on make, model, year, and CO2 emissions. Revenue themselves state it is for guidance only. The final OMSP is set at the NCTS inspection, not by the online tool. Use the calculator as a cross-check against your DoneDeal research, not as your primary estimate.

CO2 VRT Rates: The Full 2026 Table

Once Revenue assigns your OMSP, they multiply it by a percentage determined by your car's CO2 emissions. This is the CO2 rate. All passenger cars in Ireland fall under Category A VRT. The rates below apply to every Japanese import to Ireland regardless of country of origin or purchase price.

Japanese cars do not have a European Certificate of Conformity (CoC), which is the document European manufacturers use to certify emissions. For Japanese imports, Revenue accepts official emissions data from Japan's Ministry of Land, Infrastructure, Transport and Tourism, known as MLIT. Nobuko Japan provides MLIT emissions documentation with every shipment. Without it, Revenue applies a flat rate estimate that is almost always higher than the actual emissions-based rate.

The minimum charge rule applies when the percentage calculation produces a figure lower than the band minimum. You pay whichever is higher: the percentage of OMSP or the minimum charge. In practice, this only affects cars with very low OMSP values. On any car with an OMSP above €3,000, the percentage calculation will exceed the minimum charge.

The NOx Levy: Why Diesel Japanese Imports Are Expensive

Since 1 January 2020, Irish Revenue Commissioners apply a NOx levy on top of the CO2-based VRT for vehicles with significant nitrogen oxide emissions. In practice, this levy primarily affects diesel vehicles. Petrol and hybrid Japanese imports typically emit under 20mg/km NOx and pay under €100 in NOx levy. Diesel imports can pay several thousand euros in additional charges on top of their CO2-based VRT.

The NOx calculation uses a tiered rate structure. The first 60mg/km is charged at €5 per mg. The next 20mg/km (from 61 to 80) is charged at €15 per mg. Everything above 80mg/km is charged at €25 per mg. Diesel vehicles are capped at €4,850. Other fuel types are capped at €600. The example below shows how the levy builds on a diesel car emitting 120mg/km.

For Irish buyers, this levy makes most diesel Japanese imports a poor financial choice. The Toyota Estima diesel, one of the most popular models in Japan, carries a NOx levy of approximately €2,700 on top of its 28% CO2 VRT. A buyer expecting €3,000 in total VRT regularly discovers at the NCTS centre that the actual bill is over €6,000. If you are importing a diesel Japanese vehicle, obtain the official MLIT NOx documentation before you bid so you can calculate the full VRT exposure accurately. For buyers comparing fuel types before bidding, see our hybrid vs petrol VRT comparison for Ireland to understand the full 5-year cost difference.

Three Full VRT Calculations: Real Numbers

The three examples below cover the most common scenarios Irish buyers face. The Toyota Aqua represents the optimal case: a low-emission hybrid with a low OMSP and minimal NOx levy. The Toyota Voxy Hybrid represents the family car case. The Toyota Estima diesel represents the cautionary case that trips buyers who do not calculate upfront.

The difference between the Aqua hybrid and the Estima diesel is €5,205 in VRT on cars with similar Irish market values. Both are Toyota products. Both are popular Japanese models. The difference is entirely explained by emissions: 85g/km versus 165g/km CO2, and minimal versus significant NOx. This comparison is why hybrid imports consistently outperform petrol and diesel equivalents for Irish buyers.

How to Appeal Revenue's OMSP: Step by Step

Real Case: €1,400 Refund After Successful Appeal

A Nobuko Japan customer imported a 2016 Toyota Estima diesel from Japan in late 2025. Before importing, he used Revenue's online VRT calculator and estimated a total VRT of approximately €4,500. At the NCTS centre in Dublin, Revenue assigned an OMSP of €16,000. His calculator had been based on €10,000. The resulting VRT bill was €7,180, nearly €3,000 more than expected.

He knew this was wrong. His research on DoneDeal had shown Toyota Estima models selling for €10,000 to €12,000 in Ireland, not €16,000. He paid the full €7,180 as required and immediately began the appeal process. He collected three DoneDeal listings showing actual Irish sale prices between €10,000 and €11,500 and submitted his appeal to the Tax Appeals Commission with photographic evidence of each listing. Before you reach this point, understanding exactly how Revenue calculates your VRT helps you identify when an OMSP is genuinely inflated versus correctly set.

The appeal process took four months. Revenue accepted the evidence and reduced the OMSP to €11,000. The new VRT calculation produced a bill of €5,780. Revenue issued a refund of €1,400. The lesson from this case is not that importing a diesel Estima is a good idea. The high NOx levy remains even after the OMSP correction. The lesson is that Revenue's initial OMSP is negotiable when you have evidence, and that the appeal process works.

His verdict: The appeal took time but it was worth it. Never accept Revenue's first OMSP if it is clearly above actual Irish market prices. Get the DoneDeal evidence before you import, not after.

How to Appeal: What You Need

• Pay the VRT first: Appeals are not accepted until the tax is paid. You reclaim the overpayment after a successful appeal.
• Gather DoneDeal and CarZone evidence: Minimum three listings for the same model, similar year and mileage. Screenshot each listing with price visible.
• Submit to the Tax Appeals Commission: File your appeal at taxappeals.ie. Include your evidence, the Revenue OMSP figure, and your supporting market data.
• Wait for the outcome: Process typically takes 2 to 5 months. Over 50% of appeals succeed when backed by credible market evidence.

The NCTS Process: Step by Step

After your car clears Irish customs at Dublin Port or Cork and you have paid import VAT to Revenue Commissioners, the next step is your NCTS appointment. NCTS stands for National Car Testing Service. This is where VRT is formally assessed and paid, and where your car receives Irish registration.

Book your appointment within 7 days of the car arriving in Ireland. NCTS centres are located across Ireland including Dublin, Cork, Limerick, Galway, Waterford, and other locations. The appointment takes 1 to 2 hours. Bring the car and all six required documents. Missing any document means the appointment cannot proceed and a new booking is required.

Six Documents Required at NCTS

• Japanese export certificate: Issued by the Japanese government, proves permanent export and deregistration in Japan.
• Bill of Lading: From the RoRo shipping line, proves direct shipment from Japan to Ireland.
• Commercial invoice: Shows purchase price and CIF value, used for VAT calculation.
• SAD (Single Administrative Document): Customs clearance confirmation filed by your Irish customs agent.
• Proof of VAT payment: Receipt from Revenue Commissioners confirming import VAT has been paid.
• MLIT emissions data: Official CO2 and NOx figures from Japan's Ministry of Land, Infrastructure, Transport and Tourism. Critical for correct VRT rate.

Late Registration Penalties: What Happens If You Miss the Deadline

You have 30 days from the date your car arrives in Ireland to complete VRT registration. Day one is the day the car clears customs at Dublin Port or Cork. Missing this deadline triggers financial penalties and, at significant delays, risk of vehicle seizure by Revenue Commissioners.

The 30-day deadline is firm. Revenue enforcement officers check vehicle registrations and foreign-plated cars on Irish roads are identifiable. Buyers who drive Japanese-plated cars for months without registering face not just the penalty charges but potential impoundment. The process from port arrival to NCTS appointment takes 7 to 14 days when arranged promptly. There is no practical reason to miss the 30-day window.

About This Guide

Written by the Nobuko Japan import team based on 100+ Irish import shipments handled since 2014. All VRT rates sourced from Irish Revenue Commissioners published schedules (revenue.ie). OMSP methodology based on Revenue's stated valuation approach. MLIT references from Japan Ministry of Land, Infrastructure,NCTS process confirmed from NCTS Ireland official guidance (ncts.ie). Late penalty figures from Revenue Commissioners. Last reviewed: April 2026.