Do I need a NIE number for the Modelo 210?

Yes — the NIE (Número de Identificación de Extranjero) is mandatory. Without it, no Modelo 210 can be filed, no tax payment processed, and no interaction with the AEAT conducted. The NIE is Spain's tax and identification number for foreign nationals. It identifies the taxpayer in all dealings with the AEAT and every other Spanish public authority. Anyone who purchases property in Spain needs the NIE before the notarial deed can be signed — without it, the sale cannot proceed. In practice, this means that every non-resident property owner already has a NIE by the time the filing obligation arises. For those who need to obtain a NIE — perhaps because they inherited a property or are buying for the first time — the application can be made in person at a Spanish consulate or embassy in the home country, or directly in Spain at the relevant Oficina de Extranjería. A duly authorised lawyer or Gestor can also handle the application on the owner's behalf. Processing times vary. At UK consular offices, two to four weeks is a reasonable expectation, though delays are not uncommon during peak periods. In Spain, the process can be faster — sometimes completed within days, depending on the office and its workload. US and Australian applicants should allow for similar timeframes at their respective consulates. For owners who have mislaid their NIE: it appears on the original NIE certificate issued at the time of application. It is also recorded in the notarial deed of purchase — every owner's NIE is documented in the escritura. Bank records and previous tax filings are further sources. When filing the Modelo 210 through Fiscaro, the NIE is requested as part of the guided process. It must be entered correctly — errors in the NIE cause problems with the AEAT's taxpayer records and can delay processing or trigger rejection of the filing.