Understanding OMSP (Open Market Selling Price) for VRT in Ireland

Quick hook — why you should care

OMSP is the number Revenue uses as the tax base for Vehicle Registration Tax (VRT).

If OMSP goes up a little, your VRT can jump a lot — so it pays to understand how OMSP is set and how to challenge it if needed.

1) What exactly is OMSP?

OMSP stands for Open Market Selling Price.

It is Revenue's assessed retail value for a vehicle on the Irish market and is the figure used to calculate most of your VRT.

2) How does OMSP relate to VRT?

The CO₂ component of VRT is applied as a percentage of OMSP.

That means the starting OMSP is central to the final VRT bill — not the price you paid abroad.

3) How Revenue decides OMSP (the short version)

Revenue staff use market data, depreciation tables and comparable Irish retail sales to set OMSP.

They consider exact model, trim, options, mileage, condition and recent retail sales in Ireland.

4) The valuation tools & manuals Revenue uses

Revenue's VRT Manual explains the valuation system and the depreciation calculators their officers use when setting OMSP.

The manual is the authority on methods and is used in most official valuations and appeals.

5) Why OMSP can differ from your invoice

Your invoice might show what you paid in another country.

Revenue's OMSP reflects what the car would likely sell for in Ireland — and that can be higher (or sometimes lower) than your purchase price.

6) What evidence helps lower an OMSP

Good evidence is specific and directly comparable to the vehicle Revenue valued.

• Irish market sale listings for the same model/trim with similar mileage and options.
• Dealer invoices showing discounts or local market offers.
• Independent valuations from recognised valuers.
• Photos proving condition, service history proving mileage, and any modification invoices.

These items make an appeal credible and easier to win. TAC cases show comparables and conversion costs often sway outcomes.

7) What to do if you disagree with OMSP (practical steps)

Step 1 — Ask Revenue for clarification via MyEnquiries or the contact details in your VRT decision.

Step 2 — If not resolved, submit a formal written appeal with labelled evidence (comparables, invoices, valuations).

Step 3 — If the internal review fails, you can take the case to the independent Tax Appeals Commission (TAC).

Tip: keep originals and clearly label files (01-invoice.pdf, 02-comparables.pdf). Say what OMSP you think is fair and why.

Quick table — OMSP checklist (what Revenue looks at)

Where to get a pre-purchase VRT estimate

Revenue's VRT enquiry / ROS VRT calculator gives a ballpark figure before you import.

But remember: the final VRT is set at registration after Revenue assigns an OMSP and confirms CO₂/NOx data.

FAQs

1. Can OMSP be reduced after registration?

Yes — if you successfully appeal and Revenue revises the OMSP, they will adjust the VRT and refund any overpayment. Appeals often rely on clear, recent Irish comparables.

2. Is OMSP the same for all vehicle categories?

Revenue uses similar valuation principles for categories A and B, but treatment and VRT rates differ by category. See the VRT manual for category-specific rules.

3. How long does an OMSP appeal take?

Times vary. Revenue should acknowledge your appeal and assign an Appeals Officer. If unresolved you can progress to the TAC, which follows its own timelines. Keep records and follow up politely but firmly.

4. Will Revenue accept foreign invoices as proof?

Yes — but foreign invoices are weighed against Irish market comparables and conversion costs (import, transport, VAT). An invoice alone rarely beats strong Irish comparables.

5. Where can I read Revenue's official guidance?

Start at Revenue's VRT pages and the VRT Manual (valuation section) for the full methodology and legal context. Links are included in the footer.