How it works
| Element | Rule |
|---|---|
| Taxable base | Net wealth calculated as for wealth tax |
| Exempt amount | First 3 million euros of net wealth |
| Rates | Progressive bands above 3 million euros |
| Credit | Regional wealth tax actually paid |
| Limit | Combined limit with income tax for residents |
Interaction with Balearic wealth tax
The solidarity tax was designed so that the total tax does not fall below the national level where a region applies reliefs. In practice, owners with net wealth above 3 million euros calculate both taxes: the Balearic wealth tax first, and then the solidarity tax with a credit for it. See wealth tax in the Balearics.
Non-residents
Non-residents owning high-value Spanish property, such as villas in Ibiza or the southwest of Mallorca, may be within its scope on their Spanish assets. Debts that financed the property reduce the base.
Planning and residence
Because it depends on net wealth on 31 December, ownership structures, debt and the timing of a change of residence matter. Families considering a move to Spain should model it beforehand. See moving to Spain and our wealth tax service. Residents also report foreign assets on the modelo 720.
Its temporary nature
The tax was introduced as temporary and then extended. We confirm each year whether it applies and with which rules.
An illustrative example
Based on situations we commonly see; not a specific client. A Belgian family owned a villa in Ibiza worth 5 million euros through both spouses. Each held net Spanish wealth of about 2.3 million after the mortgage, below the threshold. Holding the villa jointly kept both outside the solidarity tax.
How Castell.tax can help
We calculate wealth tax and the solidarity tax for residents and non-resident owners, prepare the modelo 720 and model the effect of ownership, debt and residence decisions before 31 December, when planning still works. See our wealth tax service or contact us for an assessment of your position in English or German.
This page is published by Castell.tax, the tax practice of Castell.law in Palma de Mallorca. It is general information; tax rules and rates change, so check your case with us before filing.
Not sure what you owe? Ask before the deadline
Send us your situation or the letter you received. A tax adviser will tell you what applies, what it could cost and what to file.
Frequently asked questions
What is the threshold of the solidarity tax?
Net wealth above 3 million euros.
Does it duplicate wealth tax?
No, regional wealth tax paid is credited against it.
Do non-residents pay it?
Yes, on Spanish assets if their net Spanish wealth exceeds the threshold.
Is it permanent?
It was introduced as temporary and extended; we check its status each year.