Dutch Buyers, Box 3 and Buying Property in Spain: What Changes in 2026 13 Oct 2026

Quick answer: The Netherlands applies a Box 3 wealth tax — a deemed-return tax on assets including foreign property — to all Dutch fiscal residents, including those owning property in Spain. In 2026 the system is in full transition: the planned rate hike was cancelled, parliament approved a new real-gains taxation model in February with a 2028 effective date, and the Dutch Supreme Court has continued invalidating aspects of the current system. For Dutch Costa Blanca buyers in 2026, this has concrete practical implications worth understanding before purchasing.

Why Dutch buyers dominate the Costa Blanca South market

The Netherlands consistently ranks among the top two or three countries by purchase volume in Alicante province. In Guardamar del Segura, Torrevieja and Orihuela Costa, Dutch buyers have been a consolidated presence for decades — attracted by climate, price differential with the Netherlands, Blue Flag beaches and a lifestyle that Northern Europe simply cannot replicate. This position is maintained in 2026, but the fiscal context in the Netherlands has added a layer of complexity that active buyers need to understand and manage.

What Box 3 is and how it affects property in Spain

The Dutch income tax system divides income into three "boxes" (boxen). Box 3 taxes wealth — savings, investments, foreign property — not on actual returns earned, but on a deemed return assigned by law to each type of asset.

For 2026, the deemed rate on "other assets" — the category that includes property in Spain — is 6% of the asset's value, taxed at Box 3's 36% rate. This equals an effective annual tax of 2.16% of the property's value in Spain, regardless of whether you rent it out or not, and regardless of what you actually earn from it.

Practical example

This amount is paid in the Netherlands, in the Dutch income tax return, every year you hold the property.

Note on double taxation: The Spain-Netherlands Double Tax Treaty applies the proportional exemption method. The Netherlands exempts the Box 3 portion corresponding to the Spanish property from the total, but the presence of the foreign asset can increase the effective rate applied to the rest of the Dutch estate. A bilingual (Spain-Netherlands) tax adviser can calculate the precise impact for your specific situation.

What is changing in Box 3 in 2026

Box 3 has been declared unconstitutional by the Dutch Supreme Court in multiple rulings since 2021. The current system — based on fixed deemed returns — remains provisionally legal while the government legislates a reform, but the context is one of significant uncertainty:

January 2026: The Netherlands cancelled the planned Box 3 rate hike (which would have raised it to 7.78%). The government decided not to raise the rate to avoid accelerating the mass sale of rental properties that was already happening.

February 2026: The Dutch parliament approved a new Box 3 model based on actual capital gains taxation (vermogensaanwasbelasting), with an effective date of 2028.

Current status October 2026: The deemed-return system remains in force for 2026 and 2027. The 2028 reform may still be modified before it takes effect.

Implication for Costa Blanca buyers: If you buy now and the 2028 system taxes actual gains, Spanish property will be taxed in the Netherlands on actual rental income earned — not a deemed return. For owners who do not rent or rent at low yield, this may be more favourable. For high-yield investors, it may be comparable or slightly less favourable. A bilingual tax adviser can model both scenarios for you.

How property in Spain is taxed for a Dutch fiscal resident

Taxation operates at two levels: Spain and the Netherlands.

In Spain

If you rent the property:
As a non-resident, you pay the Impuesto sobre la Renta de No Residentes (IRNR) in Spain on the net rental income. The rate for EU/EEA residents (including the Netherlands) is 19% on net income. You can deduct actual costs related to the rental.

If you do not rent the property:
Spain applies an imputed income rule — typically 1.1% of the cadastral value of the property, taxed at 19% for EU residents. On properties with recently revised cadastral values, the rate may be 2%.

IBI (property tax):
A municipal tax paid by all property owners regardless of residency. In Torrevieja and Guardamar, typically €200–€600/year for a standard apartment.

Capital gains and municipal plusvalía on sale:
When you sell, Spain taxes the gain at 19% for EU residents (IRNR), and also applies the municipal plusvalía tax based on the increase in the cadastral land value.

In the Netherlands

Box 3 applies on the full property value using the deemed return rates described above. The Spain-Netherlands Double Tax Treaty determines which country has primary taxing rights. For real estate, Spain has primary rights. The Netherlands applies the proportional exemption with progression — meaning the Spanish property is exempt from Box 3, but is taken into account when calculating the rate applicable to the rest of the Dutch estate.

The precise application is technical. A tax adviser with experience in the Spain-Netherlands treaty is essential for correct planning.

Why Dutch buyers continue purchasing despite Box 3

Despite the fiscal complexity, Costa Blanca remains very attractive to Dutch buyers for several concrete reasons:

Price differential. A comparable property in the Netherlands costs three to five times more. Purchase price is the dominant factor in the total return calculation.

Quality of life. Climate, food, beaches and cost of living are consistently cited purchase motivations that Dutch buyers value highly — and that Northern Europe cannot match.

Rental yield. Dutch buyers in Guardamar del Segura, Mil Palmeras and La Mata typically use properties for mixed personal and rental use. Gross yields of 5–7% are achievable in those locations, particularly for longer-stay Dutch and Scandinavian tourists.

2028 reform expectation. The new system may be more favourable for owners with moderate or no rental yield. Some buyers are entering the market before the reform to avoid potentially higher costs under the new system in the future — though the final shape of the 2028 rules is not yet confirmed.

What to have clear before buying as a Dutch buyer on Costa Blanca

1. Calculate the Box 3 impact on your specific situation. The effective rate of 2.16% on the property value is the starting point, but your total Dutch estate changes the real calculation. Talk to a tax adviser before buying.

2. Understand the two levels of taxation. Spain charges IRNR (19% on net rental income or imputed rent). The Netherlands charges Box 3 on the asset's value. These are separate taxes applied differently.

3. Check the status of your Box 3 declaration. If you have pending claims from prior years due to the unconstitutionality of the system, this is the time to manage them with your Dutch tax adviser.

4. Factor in the full transaction cost. Buying costs in the Valencian Community (ITP 9% since June 2026 + notary + registry + admin) total approximately 10–11% over the purchase price for resale property.

5. Consider the ongoing annual costs. IBI, community fees, IRNR (if not renting) and Box 3 in the Netherlands all combine into an annual holding cost that needs to be modelled before purchase.

Naranja Spain and Dutch buyers

Naranja Spain works with Dutch buyers in Guardamar del Segura, Torrevieja and Orihuela Costa. Browse properties in Guardamar del Segura and properties in Torrevieja, or contact us.

For the full breakdown of buying costs in Spain, read our guide on the true cost of buying property in Spain.

Frequently asked questions

Do I have to pay Box 3 in the Netherlands on my property in Spain if I already pay taxes in Spain?
Yes, Dutch fiscal residents declare worldwide assets in Box 3, including property in Spain. However, the Spain-Netherlands Double Tax Treaty prevents actual double taxation by applying a proportional exemption in the Netherlands for taxes paid in Spain.

Does anything change for me with the 2028 Box 3 reform?
Potentially yes. The new system would tax actual gains rather than deemed returns. If you do not rent or rent at low yield, the change may be favourable. If you generate high rental yield, it may be neutral or slightly less favourable. Model both scenarios with your adviser before 2028.

How much IBI do I pay each year for a property in Torrevieja or Guardamar?
For a standard two-bedroom apartment, IBI is typically €200–€600/year. The exact amount depends on the cadastral value of the property.

Can I deduct renovation or maintenance costs in Spain?
As an EU non-resident who rents the property, you can deduct actual costs directly related to the rental (management agency, repairs, insurance, IBI, mortgage interest if applicable) from gross income before applying the 19% IRNR. If you do not rent, no deduction is possible against the imputed income charge.

This article is for informational purposes only and does not constitute tax or legal advice. Tax rules in the Netherlands and Spain change frequently. Always consult a qualified tax adviser experienced in the Spain-Netherlands double tax treaty before making property purchase decisions.