VRT on Modified Cars and Converted Vehicles in Ireland
How Revenue assesses VRT on engine swaps, campervan conversions, modified imports, and non-standard vehicles
See How Revenue Assesses →How VRT Works on Modified Vehicles
Modified and converted vehicles present a unique challenge for VRT assessment because Revenue calculates VRT based on the vehicle's specifications at the time of registration. If the vehicle has been modified from its original factory specification — whether through an engine swap, body conversion, or other substantial alteration — Revenue must determine the correct VRT category and rate based on the vehicle's current configuration rather than its original specification.
The fundamental principle is that VRT is assessed on the vehicle as it presents at the registration appointment, not as it left the factory. This means modifications can increase or decrease the VRT payable depending on the nature of the changes. An engine swap that increases CO2 emissions will attract a higher VRT rate, while converting a van to a campervan may change the vehicle classification and VRT treatment entirely.
If you are importing a modified vehicle, you should expect a more detailed assessment process. Revenue may request additional documentation, photographs, and even an NCT inspection to verify the vehicle's current condition and specifications. The assessment often takes longer than a standard import because the VRT inspector needs to determine the appropriate category and valuation without a direct factory specification to reference.
How Revenue Assesses Modified Vehicles for VRT
Revenue's VRT assessment process for modified vehicles differs from standard car assessments. Here is what happens when you present a modified vehicle for registration:
1. Visual Inspection
The VRT inspector examines the vehicle thoroughly, noting any visible modifications. This includes bodywork changes, aftermarket wheels, suspension modifications, exhaust systems, interior alterations, and any non-standard components. The inspector will take photographs of the vehicle, particularly any modifications visible from the exterior and interior.
2. Document Verification
You must provide documentation showing the vehicle's original specification and the modifications that have been made. Revenue requires invoices for all modifications, the original vehicle registration document, any certificates of conformity from the manufacturer, and in some cases, a report from an authorised vehicle tester or engineer certifying that the modifications are safe and roadworthy. Without proper documentation, Revenue may refuse to register the vehicle until the necessary paperwork is provided.
3. Emissions Testing
If the vehicle's engine has been modified or replaced, Revenue may require an emissions test to determine the actual CO2 output. This is particularly important for engine swaps where the original CO2 figure no longer applies. The emissions test must be carried out at an authorised testing centre. Revenue uses the actual measured CO2 figure to determine the VRT rate band, rather than the original factory figure.
4. OMSP Valuation
Revenue values modified vehicles using their standard OMSP database where possible, but modifications can affect the valuation. Significant modifications may increase or decrease the OMSP compared to a standard vehicle of the same make and model. Revenue will consider the quality and extent of modifications when setting the OMSP. Non-standard modifications that reduce the vehicle's appeal to the general market may reduce the OMSP, while premium modifications that add value may increase it.
Engine Swaps and VRT
Engine swaps have specific implications for VRT because the CO2 emissions figure used to determine the VRT rate is based on the installed engine, not the original one. If you import a car with a different engine than the factory specification, Revenue will assess VRT based on the engine that is actually in the car at the time of registration.
Diesel to Petrol Engine Swaps
If a diesel engine has been replaced with a petrol engine, the VRT rate is calculated based on the petrol engine's CO2 emissions. Petrol engines generally produce lower CO2 than equivalent diesel engines, so this swap can actually reduce the VRT rate. However, you need documented evidence of the swap, including proof that the petrol engine meets EU emissions standards and an emissions test certificate showing the actual CO2 output.
Petrol to Diesel Engine Swaps
A petrol-to-diesel swap usually increases VRT because diesel engines produce higher CO2 emissions and the vehicle also becomes subject to the NOx levy. The NOx levy is an additional charge applied to diesel vehicles based on their nitrogen oxide emissions, ranging from €500 to €2,400 depending on the engine's age and emissions standard. This can significantly increase the total VRT bill.
Performance Engine Swaps
Fitting a larger, more powerful engine — for example, replacing a 1.6-litre engine with a 2.0-litre turbo — will increase both the CO2 output and the OMSP. The higher CO2 figure moves the vehicle into a higher VRT rate band, and the higher OMSP means more value is subject to that rate. A performance engine swap can double or triple the VRT compared to the original specification. You must also provide proof that the vehicle is safe with the modified engine, including an engineer's report and potentially an NCT inspection.
Campervan and Van Conversions — VRT Rules
Converting a van or minibus into a campervan or motorhome changes how VRT is calculated. The key distinction is whether Revenue classifies the finished vehicle as a campervan (passenger vehicle) or a commercial van. The classification affects both the VRT rate and the OMSP valuation.
Campervan Conversion VRT
If you convert a van into a campervan, Revenue assesses VRT based on the campervan's classification. Campervans are treated as passenger vehicles for VRT purposes, meaning the rate is based on CO2 emissions like a standard car. However, the OMSP is adjusted to reflect the campervan conversion, which typically increases the valuation. The VRT on a converted campervan is often higher than on the base van because of the higher OMSP and the passenger vehicle VRT rates.
To qualify as a campervan for VRT purposes, the vehicle must meet minimum specification requirements. Typically this includes a fixed roof (not a pop-top), a bed that is permanently installed, a sink with fresh and waste water facilities, a hob or cooking facility, and a fixed table and seating area. If the conversion does not meet these criteria, Revenue may classify it as a modified van with different VRT treatment.
Commercial Van Conversions
Converting a commercial van for passenger use — by adding seats or windows — changes the vehicle's classification for VRT purposes. If you convert a panel van into a crew cab or passenger carrier, Revenue will reassess it as a passenger vehicle, which attracts a higher VRT rate than the commercial rate. This can result in a substantial VRT bill if the original import was declared as a commercial vehicle.
If you are converting a van that has already been registered in Ireland as a commercial vehicle, the reclassification to a passenger vehicle may require payment of additional VRT at the time of conversion. In practice, many conversions are done without notifying Revenue, but this carries the risk of penalty if the vehicle is involved in an accident or stopped by the Gardaí and the classification does not match the actual use.
Body Kit and Styling Modifications — Do They Affect VRT?
Visual modifications such as aftermarket body kits, spoilers, alloy wheels, window tinting, and suspension lowering can affect the VRT assessment in two ways: the OMSP valuation and the VRT rate classification.
For OMSP purposes, extensive body modifications that significantly change the vehicle's appearance may increase the valuation. A car with a high-quality body kit and premium aftermarket wheels may be valued higher than a standard example. Conversely, extreme modifications that reduce the vehicle's market appeal — such as heavily modified bodywork that looks unprofessional — may reduce the valuation.
For VRT rate purposes, most visual modifications do not change the rate because they do not affect the vehicle's CO2 emissions. However, modifications that affect the vehicle's weight or aerodynamics could theoretically change the emissions figure, though in practice Revenue uses the original CO2 figure unless the engine has been modified. Window tinting that exceeds the legal limit can also cause issues at the VRT inspection and may require rectification before the vehicle can be registered.
Documentation Required for Modified Vehicle Imports
Importing a modified vehicle requires more documentation than a standard import. Revenue needs to verify both the original vehicle specification and the nature and quality of the modifications. Having the right paperwork ready before you attend the VRT appointment will save time and significantly reduce the risk of having your application refused or sent back for additional information.
- Original V5C or foreign registration document: Showing the vehicle's make, model, engine number, and original specification.
- Invoices for all modifications: Receipts showing what was modified, when, and by whom. Professionally installed modifications with itemised invoices carry more weight than DIY work without documentation.
- Certificate of conformity (if available): The manufacturer's certificate showing the original vehicle specification. This helps Revenue understand what has been changed.
- Emissions test certificate: If the engine has been modified or replaced, an up-to-date emissions test from an approved centre showing the vehicle's actual CO2 and NOx output.
- Engineer's report or IVA certificate: For significant modifications that affect the vehicle's structure, safety, or emissions, a report from a qualified automotive engineer certifying that the modifications are safe and meet EU type-approval standards.
- Photographs of the vehicle: Clear photographs showing the modifications from multiple angles. Revenue may take their own photographs at the appointment, but having your own set ready demonstrates transparency.
- NCT certificate (if over 4 years old): The NCT must reflect the vehicle's current modified condition, not the original specification.
Specialist and Kit Cars — VRT Assessment
Specialist vehicles, kit cars, and rebuilt vehicles present the most complex VRT scenarios because there is no factory specification to reference. Revenue assesses these vehicles on a case-by-case basis, and the process is significantly more involved than a standard import.
Kit cars are assessed based on the finished vehicle's specification. Revenue will determine the OMSP by comparing the vehicle to the closest equivalent production car, or by valuing the components individually. The VRT rate is based on the vehicle's CO2 emissions as measured at an authorised test centre. If the vehicle does not have a CO2 figure because it uses a non-standard engine or has never been emissions-tested, Revenue may apply the maximum VRT rate (37% for petrol, higher for diesel) as a default.
Rebuilt vehicles — cars that have been substantially reconstructed from multiple donor vehicles — are assessed based on the earliest original component. If the chassis or monocoque is from a 2010 car, the vehicle is treated as a 2010 vehicle for VRT purposes, even if the engine, transmission, and body panels are from newer cars. The age assessment is critical because it affects the CO2 band applied and the age-related depreciation on the OMSP. Rebuilt vehicles must also pass an NCT or equivalent inspection to confirm roadworthiness.
Modified Vehicle VRT — Worked Examples
Example 1 — Engine Swap: BMW 318i to 330i
You import a 2015 BMW 318i that has been modified with a 3.0-litre turbo engine from a 330i. The original 1.6-litre engine produced 130g/km CO2, placing it in the 16% VRT band. The 3.0-litre engine produces 220g/km, placing it in the 32% band. The OMSP for a standard 318i is €14,000, but with the engine swap, Revenue values the car at €18,000. VRT without modification: €14,000 × 16% = €2,240. VRT with modification: €18,000 × 32% = €5,760. Additional VRT due to modification: €3,520. Plus NOx levy if the 330i engine is diesel.
Example 2 — Van to Campervan Conversion: VW Transporter
You convert a 2019 VW Transporter T6 panel van into a campervan and register it in Ireland. The base van has a commercial VRT rate of €200 (flat rate for commercial vehicles). After conversion to a campervan, Revenue classifies it as a passenger vehicle. The OMSP for the converted campervan is €30,000. The 2.0-litre diesel engine produces 180g/km CO2, placing it in the 28% VRT band. VRT as commercial van: €200. VRT as converted campervan: €30,000 × 28% = €8,400. Plus NOx levy. Total VRT due: approximately €9,500.
Example 3 — Body Kit and Exhaust: Modified Ford Focus ST
You import a 2018 Ford Focus ST with a performance body kit, aftermarket exhaust, and lowered suspension. The engine is standard. The standard Focus ST has an OMSP of €18,000 and CO2 of 175g/km (28% band). VRT on standard car: €18,000 × 28% = €5,040. Revenue increases the OMSP to €20,000 due to the modifications. VRT on modified car: €20,000 × 28% = €5,600. Additional VRT due to body kit: €560.
Modified Vehicle VRT FAQs
How is VRT calculated on a modified car in Ireland?
VRT on a modified car is calculated based on the vehicle's current specifications at the time of registration, not its original factory specifications. Revenue assesses the vehicle's OMSP (Open Market Selling Price) considering the modifications, determines the appropriate VRT rate based on the actual CO2 emissions of the installed engine, and applies any additional charges such as the NOx levy for diesel vehicles. If the modifications increase the vehicle's value or emissions, the VRT will be higher than the standard rate for the base model.
The assessment process involves a visual inspection by a VRT officer, verification of modification documentation, and potentially an emissions test if the engine has been changed. The key principle is that Revenue treats the vehicle as it presents, not as it left the factory. This means you cannot rely on factory CO2 figures or OMSP valuations if the car has been significantly modified. Always bring full documentation of all modifications to the VRT appointment.
Does an engine swap increase VRT?
An engine swap usually increases VRT because the replacement engine typically has different CO2 emissions than the original. If the replacement engine produces higher CO2, the VRT rate band increases. If it is a diesel engine, the NOx levy also applies. Additionally, the OMSP may be adjusted upward if the replacement engine is considered a desirable upgrade. The total VRT increase depends on how much the CO2 figure changes and the resulting change in VRT rate band.
In some cases, an engine swap can reduce VRT — for example, replacing an older diesel engine that produced 180g/km with a modern petrol engine that produces 120g/km. This would move the vehicle from the 28% VRT band down to the 14% band, significantly reducing the VRT. However, you need proper documentation, including emissions test certificates and proof that the replacement engine meets EU standards. Revenue will not accept a lower CO2 figure without certified test results showing the actual output.
What VRT do I pay on a campervan conversion in Ireland?
Campervan conversions are treated as passenger vehicles for VRT purposes, not commercial vehicles. This means VRT is calculated on the vehicle's OMSP at the standard CO2-based rate for passenger cars, not the flat €200 commercial rate. The OMSP for a converted campervan is typically higher than the base van because the conversion adds value. The VRT rate depends on the CO2 emissions of the engine installed. Most campervan conversions use diesel engines, so the NOx levy also applies.
The total VRT on a campervan conversion can be substantial. A typical VW Transporter campervan conversion with a 2.0-litre diesel engine might pay €8,000 to €12,000 in VRT, plus a NOx levy of €800 to €1,500. This is a significant increase over the €200 commercial rate. However, if the vehicle meets Revenue's campervan specification criteria (fixed roof, bed, sink, cooking facility, table), it qualifies for the passenger vehicle classification, which is unavoidable regardless of how the vehicle is used. The commercial rate is only available for vehicles that are primarily designed and used for carrying goods.
Do I need emissions testing for a modified car VRT?
If the vehicle's engine has been replaced or significantly modified, Revenue will almost certainly require an emissions test to determine the actual CO2 and NOx output. The test must be carried out at an authorised testing centre that is recognised by Revenue. The emissions certificate from the test provides the CO2 figure that Revenue uses to determine the VRT rate band. Without a current emissions test certificate for the modified engine, Revenue may apply the default maximum VRT rate of 37%, which can be very expensive.
For vehicles with visual modifications only — body kits, wheels, suspension, exhausts — that do not affect the engine, emissions testing is not typically required. Revenue accepts the original factory CO2 figure for these vehicles. However, if the modifications appear to affect the vehicle's emissions — for example, a modified exhaust system without proper certification — Revenue may still require testing. The emissions test adds to the overall cost and time of the import process. Budget approximately €150 to €300 for the test and allow a few days for scheduling.
Can I import a modified car from the UK to Ireland?
Yes, you can import a modified car from the UK to Ireland, but the process is more complex than importing a standard car. In addition to the normal post-Brexit customs duty (10%) and VAT (23%), you must satisfy Revenue that the modifications are legal, safe, and properly documented. UK-modified cars are common in Ireland because the UK has a strong car modification culture, but not all modifications that are legal in the UK are legal in Ireland.
Key considerations include whether the modifications comply with Irish roadworthiness standards (e.g., exhaust noise limits, window tint limits, suspension height limits, and tyre size regulations). If the modifications do not comply, you may need to reverse them before the car can be registered. You also need documentation for every modification, including invoices, certificates of conformity for aftermarket parts, and an engineer's report for structural modifications. Without full documentation, Revenue may refuse to register the vehicle or may apply a higher OMSP to reflect the uncertainty about the modifications' provenance.
How does Revenue value a modified car for OMSP purposes?
Revenue values modified cars by referencing their OMSP database for the base vehicle and then adjusting the valuation to account for the modifications. The adjustment can be positive or negative depending on the nature and quality of the modifications. High-quality, professional modifications that increase the vehicle's market value — such as a premium engine swap, high-end suspension upgrade, or professional body kit — can increase the OMSP. Poorly executed modifications, extreme styling changes, or modifications that reduce the vehicle's appeal to the general market may decrease the OMSP.
Revenue does not have a published schedule of how much each type of modification affects the OMSP. The valuation is at the discretion of the VRT officer, based on their experience and knowledge of the Irish second-hand car market. You can challenge the OMSP if you believe it is too high, but you need evidence of comparable modified cars selling for less in the Irish market. This is more difficult than challenging a standard OMSP because there are fewer comparable sales of modified vehicles. An independent vehicle valuation report from a recognised automotive specialist can support your challenge.
Do body kits and styling modifications affect VRT?
Body kits and styling modifications primarily affect the OMSP valuation rather than the VRT rate. Extensive, high-quality body modifications may increase the OMSP because they add to the vehicle's market value. Minor styling changes such as aftermarket wheels or a small spoiler are unlikely to significantly affect the OMSP. Revenue considers the overall effect of the modifications on the vehicle's value in the Irish market.
The VRT rate is based on CO2 emissions, so visual modifications that do not affect the engine do not change the VRT rate band. However, if the modifications are extreme — for example, a wide-body conversion that significantly changes the vehicle's weight and aerodynamics — Revenue may require an emissions test to verify that the CO2 figure is still accurate. In practice, this is rare for standard body kit installations. The most common issue with body kits at VRT inspection is that the modifications may affect the vehicle's roadworthiness compliance, particularly if the body kit changes the vehicle's lighting, number plate position, or bumper height.
What documents do I need for a modified import VRT appointment?
For a modified vehicle import, you need all the standard documentation plus modification-specific documents. Standard documents include the foreign registration certificate (V5C), proof of purchase, proof of identity and address, and insurance certificate. Modification-specific documents include itemised invoices for all modifications showing what was done, when, and by whom; an emissions test certificate if the engine has been modified; an engineer's report for structural or safety-related modifications; an IVA (Individual Vehicle Approval) certificate if the vehicle does not have a standard EU type-approval; and a certificate of conformity for the base vehicle if available.
Without proper documentation, Revenue will not register the vehicle and may require you to return with the missing paperwork. The most critical documents are the invoices for the modifications — these prove that the work was carried out professionally and that the parts used are appropriate. If DIY modifications have been carried out without documentation, you may need to have the vehicle inspected by a qualified engineer who can certify that the modifications meet appropriate standards. This adds time and cost to the process, so it is better to keep all receipts and certificates from the outset.
Can I convert a van to a campervan after VRT registration?
You can convert a van to a campervan after it has been registered in Ireland, but you need to notify Revenue and pay any additional VRT that becomes due as a result of the reclassification. If the van was imported and registered at the commercial rate (€200), converting it to a campervan changes its classification to a passenger vehicle, which attracts the standard CO2-based VRT. The additional VRT payable is the difference between the amount already paid and the amount that would have been due had the vehicle been classified as a campervan at the time of registration.
In practice, many van owners carry out campervan conversions without notifying Revenue. This is technically non-compliant, and the risk is that the vehicle is stopped at a checkpoint or involved in an accident, and the insurance company discovers that the vehicle's classification does not match its actual use. Insurance claims can be invalidated if the vehicle's declared use differs from its actual use. If you plan to convert a van after registration, it is advisable to contact Revenue beforehand to understand the VRT implications and to inform your insurance company of the change in vehicle use.
What is Individual Vehicle Approval (IVA) for modified cars?
Individual Vehicle Approval (IVA) is a type-approval process for vehicles that do not have a standard EU certificate of conformity. This includes kit cars, rebuilt vehicles, radically modified vehicles, and imported vehicles that were not originally type-approved for the EU market. IVA is administered by the National Standards Authority of Ireland (NSAI) and certifies that the vehicle meets EU safety and environmental standards on an individual basis.
For VRT purposes, an IVA certificate can be required if the vehicle's modifications are so extensive that it no longer matches any standard manufacturer specification. The IVA process involves a technical inspection of the vehicle covering braking, lighting, steering, emissions, noise, and structural integrity. The cost of IVA is approximately €1,000 to €2,000 depending on the complexity of the vehicle, and the process can take several weeks. If Revenue determines that your modified vehicle requires IVA, you must obtain the certificate before the vehicle can be registered. In practice, IVA is required mainly for kit cars, radically rebuilt vehicles, and imports from outside the EU that do not have a standard type-approval.