Fastimmat Spanish registration estimate methodology
How Fastimmat turns declared vehicle data and official references into a cautious estimate before document review.
An estimate, not an official assessment
Fastimmat's methodology is intentionally cautious. A useful Spanish registration estimate should explain what has been declared, which official references are relevant and which points still depend on documents. It is not a DGT decision, an AEAT tax assessment, a customs ruling, an ITV approval or a municipal tax bill.
The calculator helps prepare the file. When the user opens a case and uploads documents, the first result can be confirmed, adjusted or marked as uncertain if the evidence does not support the initial assumptions.
Data checked first
The estimate starts with origin country, EU or non-EU status, purchase route, first registration date, acquisition date, mileage, value, CO2, fiscal horsepower, Spanish municipality, residence scenario and available technical documents.
Those inputs separate cost families: IEDMT, municipal IVTM, VAT or ITP where relevant, customs and import VAT for non-EU cases, DGT fee, ITV, plates, technical documents and private service fees. They are shown separately so a public tax is not confused with a Fastimmat fee or a third-party cost.
Sources used
- DGT. Ordinary Spanish registration and foreign vehicle routes.
- Agencia Tributaria. First registration tax, customs, import VAT and new-versus-used vehicle guidance.
- BOE. Legal references for IEDMT, vehicle values and municipal tax framework.
- Municipal ordinances. IVTM data where an official local source has been verified.
- User documents. V5C, foreign registration certificate, invoice, COC, ITV, DUA, residence and ownership evidence.
Confidence levels
| Input | Why it matters | Risk if missing |
|---|---|---|
| Spanish municipality | Points to IVTM. | Municipal tax may be wrong. |
| CO2 | Can affect IEDMT. | Tax estimate remains fragile. |
| Invoice or ownership proof | Supports value, seller and dates. | VAT, ITP or customs reading may be unclear. |
| Non-EU origin | Triggers customs review. | DUA or import VAT evidence may be missing. |
| COC / ITV | Supports technical conformity. | Ficha reducida or extra review may be needed. |
Six months, 6,000 km and used vehicles
The six-month and 6,000 km markers can matter for fiscal classification. Fastimmat does not treat them as a standalone answer. They are read alongside the first use date, delivery date, mileage, seller, purchase route and documents available.
This is especially important for UK owners, where Brexit-related customs, import VAT, V5C export handling and Spanish technical documents can interact with the cost estimate.
Limits kept visible
Fastimmat separates calculated, estimated and to-confirm items. It also distinguishes verified data from user-declared or pending official confirmation data. That keeps the estimate useful without pretending that a complex file has already been approved.