The convention governing Dutch-Spanish tax relations dates from 1971. In March 2026 Spain cleared a replacement for signature, and for anyone holding Spanish real estate through a Dutch entity it is not a technical update.
For more than fifty years, tax relations between Spain and the Netherlands have run on a convention signed in 1971. It predates the EU directives that now do most of the work for corporate groups, the BEPS project that reshaped international tax norms, and virtually every structuring technique it is currently asked to govern.
That is now changing. On 10 March 2026 the Spanish Council of Ministers authorised the signature of a new agreement to replace it. The stated purpose is to align the bilateral relationship with current OECD standards and to close routes to non-taxation or reduced taxation through aggressive planning.
After signature the agreement must be approved and ratified by the parliaments of both countries before it takes effect, and entry-into-force provisions determine which periods it applies to. Anyone planning around it should check the current status rather than assume either that it is already operative or that it is years away.
Reported features of the new agreement cluster around one theme: making it harder to obtain benefits without genuine economic connection.
| Feature | What it does | Who feels it |
|---|---|---|
| Real-estate-rich company gains | Allows source-state taxation of gains on shares in companies deriving their value principally from immovable property | Dutch entities holding Spanish property through companies |
| Principal purpose test | Denies benefits where obtaining them was a principal purpose of an arrangement | Any structure without a commercial rationale beyond tax |
| Fiscally transparent entities | Sets rules for income earned through transparent vehicles | Fund structures, partnerships, CVs and similar |
| Third-country PE limitation | Restricts benefits where income is attributed to a permanent establishment in a low-taxed third state | Groups routing income through third-country branches |
| Dual residence tie-breaker | Clarifies residence where both states could claim it | Mobile management, dual-resident entities |
| Withholding limits | Caps on dividends, interest and royalties, updated | Groups outside directive scope |
This is the change with the largest practical consequence, and it deserves to be understood plainly. A common structure has been to hold Spanish property through a company, and to sell the company rather than the property. Under an older treaty without a real-estate-rich clause, the gain on those shares could fall outside Spanish taxing rights.
A real-estate-rich provision closes that. Where a company's value derives principally from immovable property situated in Spain, Spain may tax the gain on a disposal of shares in it — treating the share sale, in substance, as what it is.
Holiday and residential portfolios, commercial property, hospitality assets, land held for development, and any structure whose exit was modelled on a share sale rather than an asset sale.
A Dutch parent over a Spanish SL that manufactures, distributes or provides services. Value derives from the business, not from property, and the directives already govern the ordinary flows.
Transitional and entry-into-force rules determine which disposals fall under which instrument. That timing question is precisely why the review belongs now: options that exist before entry into force may not exist afterwards, and discovering this during a sale process is the worst moment.
A point that gets lost in treaty discussion: for an ordinary Dutch-Spanish corporate group, the EU directives generally do more work than the treaty. The Parent-Subsidiary Directive can eliminate withholding on dividends between associated companies; the Interest and Royalties Directive can do the same for those flows. Both apply because the Netherlands and Spain are member states, and neither depends on the bilateral convention.
A PPT clause denies a treaty benefit where obtaining that benefit was one of the principal purposes of an arrangement, unless granting it would accord with the object and purpose of the relevant provisions. It is a wide test and it shifts the burden of demonstrating commercial rationale onto the taxpayer.
Structure review covering the ownership chain, substance position, directive eligibility and the disposal route — before entry into force closes options that are open now.