When several Spanish regions reduced their wealth tax to zero to attract the wealthy, the Spanish state did something unusual: it created a new national tax whose evident purpose was to reach exactly those people. The solidarity tax on large fortunes is one of the clearest examples in modern European taxation of a central government overriding a regional incentive, and for anyone with substantial wealth in Spain it is now unavoidable to understand.
The problem it was built to solve
Regions such as Andalucía had rebated their wealth tax to nothing, and Madrid had done so since 2008, so what a large fortune paid depended on which side of a regional border it sat. From the state’s perspective, large fortunes were escaping net-wealth taxation entirely. The solidarity tax was the answer: a levy on the largest fortunes, created by article three of Law 38/2022, that the regions cannot rebate away, because it belongs to the state rather than to them.
How it works
The tax applies to net wealth above three million euros, but seven hundred thousand euros come off the base first and the next three million is taxed at nothing, so nothing is due, and nothing is filed, below three million seven hundred thousand euros. Above it the marginal rates are one point seven, two point one and three point five per cent, the last from eleven point four million. It dovetails with the regional wealth tax: what a person pays there is credited against the national one, so residents in regions that levy it feel little additional impact. The regions that had zeroed it answered rather than absorbed the state levy: they converted their full rebate into a variable one, so that a resident above the threshold pays the region what would otherwise have gone to the state, and the credit extinguishes the national charge. The contest was over who collects, and the regions won it.
The charge crystallises on the thirty first of December and is settled the following summer, the Ministry of Finance having fixed the first to the thirty first of July of the year after accrual as the filing window for form 718 and placed it after the wealth tax return precisely because the wealth tax actually paid is what comes off the national bill. There is no withholding and no assessment by the administration: the taxpayer self assesses electronically, and the state keeps management, inspection and collection to itself. Only a taxpayer whose final figure is payable files at all.
The regions offered the wealthy a way out. The state built a tax whose entire design was to close it. That contest is now the centre of Spanish wealth planning.
What the base includes, and what it leaves out
Because the solidarity tax borrows the wealth tax definitions wholesale, the assets it exempts are those already exempt under the Wealth Tax Act of 1991, and the two that matter most to a private client are the main home, relieved up to three hundred thousand euros for whoever actually lives in it, and the family business. The business relief is not automatic. The shareholding has to be at least five per cent held individually or twenty per cent counting spouse, ascendants, descendants and second degree collaterals, a shareholder has to perform genuine management functions remunerated at more than half of his business, professional and employment income, and the company must not be one whose main activity is holding securities or property. Where the holding is counted across the family group, that management and that remuneration need only be met in one member of it and the relief still reaches all of them, which is what saves the passive sibling. A family vehicle assembled to own a villa and a portfolio will usually fail the third condition instead, which is where a good deal of planning goes wrong.
Valuation is the other half of the problem. Spanish real estate enters the base at the highest of its cadastral value, any value determined or checked by the administration for another tax, and the price paid, so a recent purchase at market price sets the floor for years afterwards. Debts count at nominal value only where they are properly documented, and a debt contracted to acquire an exempt asset is not deductible, but where the exemption is itself partial, as it is on a main home relieved only to three hundred thousand euros, the proportionate part of the debt does come off. Someone liable on Spanish assets alone is narrower still: only charges on those assets and debts representing capital invested in them reduce the base, so a facility drawn abroad against foreign collateral does nothing for the Spanish figure.
Who it actually hits
It applies not only to Spanish residents on their worldwide assets but to non-residents on their Spanish ones, including unlisted shares in companies at least half Spanish property, directly or indirectly. The seven hundred thousand euro exempt minimum, confined to residents in the original text, has reached non-residents since the tax’s first year, and the sixty per cent ceiling on the three taxes, which never lifts more than four fifths of the charge, written for worldwide liability alone, has now been opened to them as well. Nor does this tax displace the wealth tax itself, which can reach a non-resident from seven hundred thousand euros of Spanish assets. A wealthy foreigner who owns substantial Spanish property can therefore be in scope without living in Spain, which is why it belongs in the analysis before a large purchase, alongside the ownership question in our note on holding a Spanish home.
The ceiling that moved in 2026
That ceiling changed recently, and in the taxpayer’s favour. As drafted it caps the combined charge of income tax, wealth tax and the solidarity tax at sixty per cent of the income tax base, and it says in terms that it is for taxpayers liable on their worldwide wealth. The Supreme Court broke that limitation in two judgments of autumn 2025, holding that habitual residence does not justify denying the equivalent wealth tax ceiling to non-residents, and that the difference in treatment is discriminatory and unjustified. The Central Economic Administrative Tribunal carried the reasoning across to the solidarity tax that December, and because the General Tax Act binds the administration to that tribunal’s settled doctrine, the Ministry replaced the form 718 return itself with effect from the filings opening on the first of July 2026. The obvious beneficiary is the non-resident with a large Spanish asset and little Spanish income.
From temporary to permanent
Introduced for two financial years only, it was extended with no end date, until wealth taxation is reviewed inside the reform of regional financing, and the Constitutional Court upheld it against Madrid’s challenge in judgment 149/2023. It is still filed every July on form 718, which removes the option of waiting it out. Anyone planning around Spanish wealth taxation has to assume it is here to stay.
That judgment fixed the ground rules. Madrid’s regional government attacked the whole of article three, arguing among other things that the state had unilaterally rewritten the terms of a ceded tax and had broken the taxpayer’s legitimate expectations. The Plenary dismissed the challenge in its entirety, reasoning that the new tax does not interfere with the region’s powers over the wealth tax and that a state tax pursuing harmonisation is covered by the coordination principle, a line the Court had already taken over the tax on bank deposits. Four magistrates dissented and would have struck down the whole of article three, on three grounds: the attack on the financial and political autonomy of the regions, the parliamentary amendment route by which the tax was introduced, which they read as disregarding the democratic principle and the reservation of tax matters to statute, and the offence to legal certainty in applying it to 2022, a year in which the tax took effect a day after its own law was published and two days before it accrued. Madrid then legislated rather than litigate further, and its statute records what was at stake, ten thousand three hundred and two Madrid taxpayers declaring five hundred and fifty five million euros for 2022. Andalucía took the same route, and the tax office’s current wealth tax manual sets out the transitional variable rebate that replaced its hundred per cent relief.
Where it meets the impatriate regime
The interaction that most often decides where a mover lands is with the special regime that everyone calls the Beckham law, and the first thing to get right is who may use it. Article 93 of the income tax act opens it to those who acquire Spanish tax residence on taking up employment here, including work performed remotely for a foreign employer, on becoming the administrator of a company, or on starting an activity certified as entrepreneurial or as highly qualified work for a start-up or in research and development, provided they have not been resident in Spain in the five tax years before the move and, outside those last two routes, earn no income treated as arising through a Spanish permanent establishment. The administrator route carries one restriction worth knowing, since it is the one a private client most often uses: where the company is a passive asset-holding vehicle, he cannot hold a stake in it large enough to make him a related party. The holder then elects to be taxed under the non-resident income tax rules for the year of the move and the five following years, and the same article adds the line that matters here: whoever elects that treatment is liable to wealth tax on Spanish assets alone. Because the solidarity tax takes its taxpayers from the wealth tax and on the same terms, the impatriate sits outside it for foreign assets, save for those the wealth tax deems Spanish anyway, such as the unlisted shares in a company made largely of Spanish property described above. That makes the regime a shelter from net wealth taxation as much as from income taxation, a point our technical guide to the Beckham law develops, and it sets a cliff edge: in the seventh year worldwide assets enter the base, with the foreign asset reporting that follows them. For anyone who would rather not reach that line, the prior question is residence itself, which we take up in our note on moving to Spain without becoming tax resident.
What it means for a wealthy mover
The practical consequence is that the old shortcut, move to a zero-wealth-tax region and pay nothing, is no longer complete. The regional choice still matters, as we set out in our note on the Spanish regions where the wealthy pay no wealth tax, but it now sits inside a national framework that has to be modelled as a whole. For a wealthy person moving to or investing in Spain, the interaction of the regional and national wealth taxes is not a detail; it is one of the defining costs of being there, and it rewards being planned rather than discovered.
Modelling it is not difficult, but the order matters: the scope of liability first, then the exemptions, then valuation, then the regional tax, the national one, the credit, and only last the combined ceiling. Starting from the regional headline position gives the wrong answer in both directions.
Montclare advises international individuals and families on buying, holding and moving to Spain: the structure, the tax, the residence and the succession, handled as one plan. Our services are set out on our services page.
This article is informational and does not constitute tax, legal or immigration advice. Spanish regimes vary by region and change frequently, and treatment depends on personal circumstances. Each engagement is subject to scope and applicable regulation.