On 27 December 2022 Spain enacted Law 38/2022 and created the Impuesto Temporal de Solidaridad de las Grandes Fortunas.
The measure mattered for more than its rates. It demonstrated that a central government can alter the practical effect of regional wealth-tax competition by creating a separate state-level levy that interacts with existing wealth taxation.
For internationally mobile individuals, the lesson is simple: residence analysis that focuses only on income tax can miss a material part of the exposure.
Key takeaways
- The solidarity tax was created as a state-level levy on large fortunes that interacts with Spain’s existing wealth-tax system.
- Its “temporary” label was a description in the original law, not a guarantee that the policy would disappear before affecting future decisions.
- For high-net-worth individuals, residence, asset location, exemptions and wealth-tax rules must be analysed together.
What happened on 27 December 2022
Law 38/2022 created the Temporary Solidarity Tax on Large Fortunes.
The design was closely linked to the existing Wealth Tax framework. It was aimed at high levels of net wealth and included mechanisms intended to coordinate the two taxes and avoid simply charging the same amount twice without adjustment.
The political context was also important. Some Spanish autonomous communities had used their powers over Wealth Tax to reduce the effective burden, including through significant regional relief.
A state-level solidarity tax changed that competitive landscape.
Why it was a turning point
Tax competition does not occur only between countries.
Within decentralised systems, regions can also compete through taxes under their control. If a central government introduces a new state tax that counteracts or limits the effect of regional relief, the economic meaning of that regional competition changes.
That is what made the solidarity tax more important than a new line on a tax return.
It showed that a residence decision based on a specific regional tax advantage can be exposed to policy risk at another level of government.
For a mobile family or investor, “Spain” is therefore not one tax rate, and “Madrid” or another region is not a complete answer either. The analysis has to understand how national and regional rules interact.
What was misunderstood
The word temporary encouraged a natural but unsafe inference: that taxpayers could treat the measure as short-lived noise.
Tax planning cannot rely on that assumption.
A second error was to describe the tax as if it simply duplicated Wealth Tax without any interaction mechanism. The legal design is more specific and must be read together with existing wealth-tax rules.
A third error was to turn the debate into a slogan about whether Spain is a “tax hell” or whether taxing wealth is intrinsically fair.
Those are political positions. They do not answer the practical question an international person faces: what assets are within scope, which exemptions apply, how residence is determined and what the total annual burden is under current law.
What happened next
The tax was challenged before Spain’s Constitutional Court.
In 2023 the Court rejected a major constitutional challenge to the measure. Other challenges by regional governments were also dismissed.
The legal survival of the tax reinforced the central planning lesson: a measure labelled temporary and politically contested can still become a real compliance and cash-flow issue.
What changed since then?
The solidarity tax has continued to form part of the Spanish wealth-tax landscape rather than disappearing immediately after its introduction.
For current planning, this means that Wealth Tax and the solidarity tax need to be reviewed together using the law applicable to the relevant year and region.
It is particularly important not to carry forward an old memo or assumption because rates, reliefs, regional rules and state-level measures can change.
The strongest objection
The strongest objection to treating this as a major turning point is that it affects a relatively narrow high-net-worth population rather than the ordinary taxpayer.
That is correct.
Its significance is therefore not mass taxation. It is what the tax reveals about policy durability and multi-level tax competition.
For international private clients, a narrow tax can still be highly material if it applies to exactly the asset base and residence profile under consideration.
What it means for international individuals
A serious residence comparison should not begin and end with marginal income-tax rates.
For a person with substantial assets, the analysis may need to include:
- tax residence and treaty position;
- worldwide versus source-based exposure;
- Wealth Tax and solidarity-tax rules;
- exemptions for qualifying assets or business interests;
- valuation rules;
- ownership through entities or transparent arrangements;
- regional rules; and
- exit, arrival and reporting obligations.
No single metric captures that position.
The solidarity tax is a reminder that jurisdictional choice is a whole-system decision. Income, wealth, succession, entities and reporting can all matter at the same time.
Sources
Disclaimer
This article is general historical and tax-policy information, not legal or tax advice. Spanish wealth taxation depends on residence, asset type, valuation, exemptions, autonomous-community rules and the law applicable to the relevant tax year. Current advice should be obtained before making a residence or asset-structuring decision.
