Article 9.1 of the Spanish Personal Income Tax Law (LIRPF) sets out three alternative criteria, meeting any one is sufficient: spending more than 183 days during the calendar year in Spanish territory (sporadic absences are counted towards this period unless tax residency in another country is proven); Spain being the main base of the individual’s activities or economic interests, whether direct or indirect; or a rebuttable presumption of residency where the non-legally-separated spouse and dependent minor children habitually reside in Spain, unless proven otherwise.

When two States consider the same individual a tax resident under their respective domestic law, Double Tax Treaties (DTTs) apply the tie-breaker rules set out in Article 4.2 of the OECD Model Convention: permanent home available; centre of vital interests (closest personal and economic relations); habitual abode; nationality; and, as a last resort, the mutual agreement procedure between competent authorities (Article 25 OECD Model Convention).

When a tax residency certificate is expressly issued for the purposes of the applicable Double Tax Treaty, Spain cannot challenge its validity: the certificate establishes residency for treaty purposes and is binding on the Spanish tax authorities under the treaty itself (Spanish Supreme Court judgment of 12 June 2023, appeal no. 915/2022, reaffirmed by the judgment of 15 July 2025, appeal no. 4023/2023, which further recognises a rebuttable presumption of validity in favour of the certificate). The certificate must expressly state that it is issued for treaty purposes; a generic residency certificate without that specific reference does not produce this binding effect and may be challenged by the AEAT under the criteria of Article 9 LIRPF.

The law contains no closed list; it is a judgment based on weighted indicators: the source and amount of income, the location of assets and wealth, the seat of effective business management, ownership of real estate, bank accounts, and the centre of wealth management. The Directorate General for Taxes (DGT) has analysed characteristic cases of income split between two countries (binding ruling V2558-25, of 18 December 2025): having more foreign income than Spanish income does not resolve the criterion on its own, and the DGT refers the factual assessment to the AEAT’s assessment and audit bodies. It is a case-by-case analysis, not a fixed threshold.

Yes, it is a rebuttable presumption (Article 9.1, final paragraph, LIRPF); it can be rebutted by proving effective and separate tax residency of the taxpayer in another State, normally through a residency certificate from that country together with evidence of economic ties and genuine presence there, while also ruling out the existence of the taxpayer’s own centre of economic interests in Spain. The DGT requires the rebutting evidence to be consistent with the other criteria; a certificate alone is not sufficient.

For personal income tax purposes, tax residency is determined for the full tax period: Spain has no split-year system as found in other countries (except for the special rule on changing Autonomous Community, which is a different matter). If any of the criteria under Article 9 LIRPF is met at any point during the calendar year, the individual is taxed as a resident for the entire tax year, without prejudice to the exit tax regime (Article 95 bis LIRPF, applicable only to certain unrealised capital gains on significant shareholdings, and only to individuals who have been resident for at least 10 of the previous 15 tax years).

Article 8.2 LIRPF provides that Spanish nationals who establish new tax residency in a country or territory classified as a tax haven (non-cooperative jurisdiction, under current terminology) do not lose their status as personal income taxpayers in Spain, and continue to be taxed on their worldwide income. This rule applies in the tax year of the change of residence and the following four tax years, with no exception based on the type of employment or activity. It is an anti-abuse clause (trailing tax) whose compatibility with EU law has been questioned by legal scholars where the destination is an EU/EEA territory classified as such, although no Court of Justice of the EU ruling has struck it down.

No. Unlike regimes such as the UK’s, Spain does not allow the calendar year to be split between a non-resident period and a resident period. If the residency criteria under Article 9 LIRPF are met at any point during the year, the taxpayer is treated as a Spanish tax resident for the entire tax year, taxed on worldwide income from 1 January, not only from the actual date of arrival.

No. The NIE, the residence permit and municipal registration (empadronamiento) are administrative or immigration formalities, independent of tax residency. Tax residency is determined exclusively under the criteria of Article 9 LIRPF (days of presence, centre of economic interests, family presumption), regardless of the individual’s immigration status or municipal registration.

A tax resident is taxed on worldwide income through an annual personal income tax return (Form 100), with an additional obligation to report foreign assets (Form 720) if the statutory thresholds are exceeded. A non-resident is taxed only on income obtained within Spanish territory, through the Non-Resident Income Tax (Form 210).