If you're weighing up the Netherlands vs Portugal wealth tax regimes for 2025/2026, you're far from alone. Both countries attract international investors, retirees, and digital nomads—but their approaches to taxing wealth could not be more different. Understanding these differences can save you thousands of euros per year, and in some cases, influence where you choose to live, invest, or hold assets.
In this detailed wealth tax comparison, we'll walk through how each country taxes net wealth, what exemptions are available, how the systems interact with income tax, and what common pitfalls to avoid. Whether you're a Dutch resident considering a move to Portugal, a Portuguese citizen with assets in the Netherlands, or an expat evaluating both countries, this guide will give you the clarity you need for the 2025/2026 tax year.
How Wealth Tax Works: A Quick Overview
Before diving into the specifics of each country, it's helpful to understand what "wealth tax" actually means in the European context.
A wealth tax is a levy on the net value of a taxpayer's assets—typically including savings, investments, real estate, and other holdings—minus allowable liabilities. Unlike income tax, which taxes earnings, wealth tax targets what you own, regardless of whether those assets produce any income.
However, not every country implements this concept in the same way. Some nations levy a direct annual tax on net worth, while others—like the Netherlands—use a deemed or presumptive return system that effectively functions as a wealth tax, even though it's technically classified under income tax.
Let's break down each country's approach.
Wealth Tax in the Netherlands: Box 3 Explained (2025/2026)
The Netherlands does not have a traditional, standalone wealth tax. Instead, it taxes wealth through Box 3 of its income tax system, which covers "income from savings and investments." However, the way Box 3 works makes it function almost identically to a wealth tax, and it is widely regarded as one in international tax discussions.
How Box 3 Works
Under Box 3, the Dutch tax authorities calculate a deemed (fictitious) return on your net assets and then tax that deemed return at a flat rate. As of 2025/2026, the system works as follows:
- Tax-free allowance (heffingsvrij vermogen): Each individual taxpayer has a tax-free threshold of approximately €57,000 (fiscal partners together: approximately €114,000). Only net assets above this threshold are subject to Box 3.
- Deemed return categories: The deemed return is calculated based on the composition of your assets:
- Savings (bank deposits): A low deemed return percentage (linked to actual average savings interest rates; for 2025 this is expected to be around 1.0%–1.5%).
- Investments and other assets (stocks, bonds, real estate other than primary residence, crypto): A higher deemed return percentage (expected around 5.5%–6.0% for 2025).
- Debts: A deductible deemed return on debts (linked to average mortgage interest rates).
- Tax rate on deemed return: The flat Box 3 tax rate for 2025 is 36%.
Practical Example: Netherlands Box 3
Suppose you are a single Dutch tax resident with the following assets:
| Asset Type | Value |
|---|---|
| Savings accounts | €80,000 |
| Investment portfolio (stocks, ETFs) | €200,000 |
| Total gross assets | €280,000 |
| Outstanding debts (excl. mortgage on primary home) | €20,000 |
| Net assets | €260,000 |
| Tax-free allowance | €57,000 |
| Taxable base | €203,000 |
The deemed return is calculated proportionally:
- Savings portion: (€80,000 / €280,000) × €203,000 = ~€58,000 at 1.03% deemed return = €597
- Investment portion: (€200,000 / €280,000) × €203,000 = ~€145,000 at 5.88% deemed return = €8,526
- Total deemed return = ~€9,123
- Box 3 tax at 36% = approximately €3,284
This means you'd pay roughly €3,284 in effective wealth tax, even if your actual returns were lower—or even negative. You can estimate your own liability using our Netherlands Wealth Tax Calculator.
Key Points About Netherlands Box 3
- Primary residence is excluded from Box 3 (it's taxed separately under Box 1).
- The system is currently under reform following a landmark Dutch Supreme Court ruling (Kerstarrest, December 2021) that found the old flat deemed-return system violated property rights. The government is transitioning to a system that more closely reflects actual returns, but the category-based deemed return system remains in effect for 2025/2026.
- Non-residents with Dutch-source assets (e.g., Dutch real estate other than a primary residence) may also be subject to Box 3.
- Fiscal partners can optimally allocate Box 3 assets between them for a lower combined tax bill.
Wealth Tax in Portugal: What You Need to Know (2025/2026)
Portugal also does not levy a traditional, broad-based annual wealth tax on total net worth. However, it does have a targeted wealth-related tax on high-value real estate, known as the Adicional ao Imposto Municipal sobre Imóveis (AIMI)—the "Additional Municipal Property Tax." Beyond AIMI, Portugal has no tax on financial wealth (savings, stocks, bonds, crypto) purely for holding those assets.
AIMI: Portugal's Real Estate Wealth Tax
AIMI is levied annually on the taxable value (Valor Patrimonial Tributário, or VPT) of Portuguese residential and building-land properties owned as of January 1st each year. Here's how it works for 2025/2026:
- Tax-free threshold: €600,000 per individual taxpayer (€1,200,000 for married couples or civil partners who elect joint taxation).
- Rates:
- 0.7% on the VPT between €600,000 and €1,000,000
- 1.0% on the VPT exceeding €1,000,000
- 0.4% flat rate for properties held by companies (unless they are in blacklisted jurisdictions, in which case the rate is 7.5%)
- Surtax: A marginal 1.5% rate applies to individual taxpayers whose total Portuguese property VPT exceeds €2,000,000.
Practical Example: Portugal AIMI
Suppose you are a single resident of Portugal and own two apartments with a combined VPT of €900,000:
| Component | Calculation | Tax |
|---|---|---|
| First €600,000 | Exempt | €0 |
| €600,001–€900,000 (€300,000) | 0.7% | €2,100 |
| Total AIMI | €2,100 |
If instead you owned properties worth €1,500,000:
| Component | Calculation | Tax |
|---|---|---|
| First €600,000 | Exempt | €0 |
| €600,001–€1,000,000 (€400,000) | 0.7% | €2,800 |
| €1,000,001–€1,500,000 (€500,000) | 1.0% | €5,000 |
| Total AIMI | €7,800 |
Use our Portugal Wealth Tax Calculator to model your own scenario.
Key Points About Portugal's Wealth Tax (AIMI)
- AIMI applies only to Portuguese real estate—not to financial assets, foreign property, or other wealth.
- The VPT (taxable value) is often significantly lower than the property's market value, especially for older properties. However, Portugal has been gradually updating VPTs.
- In addition to AIMI, property owners in Portugal also pay the regular IMI (Imposto Municipal sobre Imóveis) at municipal rates of 0.3%–0.45% for urban properties—this is a separate, general property tax, not a wealth tax per se.
- Non-residents who own Portuguese real estate are also subject to AIMI under the same rules.
- AIMI is paid annually, typically in September.
Netherlands vs Portugal Wealth Tax: Side-by-Side Comparison
Here's a direct tax comparison Netherlands Portugal for the 2025/2026 tax year:
| Feature | Netherlands (Box 3) | Portugal (AIMI) |
|---|---|---|
| Type | Deemed return on net wealth (effectively a wealth tax) | Surcharge on high-value real estate |
| Assets covered | Savings, investments, real estate (excl. primary home), crypto, other assets | Portuguese residential real estate and building land only |
| Tax-free threshold | ~€57,000 per person | €600,000 per person |
| Tax rate | 36% on deemed return (~0.37%–2.12% effective on asset value, depending on asset type) | 0.7%–1.5% on VPT above threshold |
| Financial assets (stocks, bonds, savings) | Taxed | Not taxed |
| Foreign real estate | Taxed (for residents) | Not taxed (AIMI covers only Portuguese property) |
| Primary residence | Excluded | Excluded from AIMI (subject to IMI) |
| Non-residents | Taxed on Dutch-source assets only | Taxed on Portuguese property |
| Filing | Annual income tax return (May 1 deadline) | Automatic assessment; payment in September |
What This Means in Practice
- If your wealth is primarily in financial assets (savings, stocks, ETFs, bonds, crypto), the Netherlands taxes this significantly through Box 3, while Portugal does not tax financial wealth at all—only the income or gains from those assets when realized.
- If your wealth is concentrated in high-value Portuguese real estate, Portugal's AIMI can be meaningful but is generally lower in effective rate than the Dutch Box 3 for equivalent asset values.
- For a diversified portfolio worth €500,000 above the tax-free threshold—split between savings and investments—the Dutch effective wealth tax could range from roughly €1,800 to €10,000+ per year, depending on asset composition. In Portugal, the same financial portfolio would attract €0 in wealth tax.
The NHR and Its Impact on Wealth Taxation
Portugal's Non-Habitual Resident (NHR) regime has been one of Europe's most attractive tax incentives for expatriates. While the classic NHR program closed to new applicants in 2024, a modified successor—sometimes called NHR 2.0 or the "tax incentive for scientific research and innovation"—is available from 2025 for qualifying new residents.
How NHR Affects Wealth Tax
- The NHR (and its successor) primarily offers benefits on income tax, not wealth tax. It does not exempt residents from AIMI.
- However, because Portugal does not levy a broad wealth tax on financial assets, NHR residents benefit from the general absence of such a tax—there's simply nothing to exempt them from.
- For Dutch residents considering a move to Portugal, the shift from Box 3 to the Portuguese system can result in substantial savings, especially for those with large investment portfolios.
To understand how income tax interacts with wealth in each country, check out our Netherlands Income Tax Calculator and Portugal Income Tax Calculator.
Double Taxation Treaties and Cross-Border Considerations
The Netherlands and Portugal have a bilateral double taxation agreement (DTA) in force. While this treaty primarily addresses income tax, it has important implications for wealth-related taxes:
- Real estate: Under most DTAs, including the Netherlands-Portugal treaty, real estate is taxed in the country where it is located. So a Dutch resident owning Portuguese property pays AIMI in Portugal, and a Portuguese resident owning Dutch property may face Box 3 in the Netherlands.
- Financial assets: Generally taxed in the country of residence. If you move from the Netherlands to Portugal, your Dutch investment portfolio would no longer be subject to Box 3 (assuming you sever Dutch tax residency), and Portugal would not impose a wealth tax on it.
- Exit tax (emigration levy): The Netherlands imposes a so-called conserverende aanslag (conserving assessment) on unrealized capital gains in certain situations when a taxpayer emigrates. This is not a wealth tax per se, but it's a crucial consideration for anyone moving from the Netherlands to Portugal.
Common Mistakes to Avoid
- Assuming "no wealth tax" means "no tax on wealth": Portugal doesn't tax the holding of financial assets, but it does tax dividends, interest, and capital gains as income. The Netherlands taxes the holding of assets through Box 3, often regardless of actual returns.
- Ignoring VPT vs. market value: In Portugal, AIMI is based on the fiscal value (VPT), not market value. Many property owners overestimate their AIMI liability.
- Forgetting about Box 3 for non-residents: If you move to Portugal but retain Dutch real estate (other than a former primary home under specific conditions), you may still owe Box 3 tax in the Netherlands.
- Not optimizing fiscal partnership: In the Netherlands, fiscal partners can allocate Box 3 assets to minimize their combined tax. Failing to do so can cost hundreds or thousands of euros.
- Overlooking transition rules: The Dutch Box 3 system is evolving. Keep up with the latest rules, as the government plans to implement a system based on actual returns (potentially from 2027 onwards).
Frequently Asked Questions
Does Portugal have a wealth tax?
Portugal does not have a broad-based wealth tax. However, it levies AIMI, a surcharge on high-value Portuguese real estate with a tax-free threshold of €600,000 per individual. Financial assets such as stocks, bonds, and savings are not subject to any wealth tax in Portugal.
Does the Netherlands have a wealth tax?
Not in the traditional sense. The Netherlands taxes wealth through Box 3 of its income tax system, which applies a deemed (fictitious) return on net assets above approximately €57,000 and taxes that return at 36%. The effective result is very similar to a wealth tax.
Which country is better for high-net-worth individuals: Netherlands or Portugal?
From a pure wealth tax perspective, Portugal is generally more favorable, especially for individuals whose wealth is in financial assets rather than Portuguese real estate. The Netherlands' Box 3 can result in significant annual tax liabilities on investment portfolios, while Portugal imposes no equivalent charge.
Are crypto assets subject to wealth tax in either country?
In the Netherlands, crypto assets are included in Box 3 and subject to the deemed return and 36% tax rate, treated similarly to other investments. In Portugal, holding crypto assets does not attract a wealth tax. However, gains from selling crypto may be subject to capital gains tax under Portuguese income tax rules.
What happens if I own property in both countries?
Under the Netherlands-Portugal double taxation treaty, real estate is taxed where it's located. Dutch property may be subject to Box 3 for Dutch residents (or non-residents with Dutch property), while Portuguese property is subject to AIMI in Portugal. The DTA generally provides relief to avoid double taxation on the same asset.
Conclusion: Key Takeaways for 2025/2026
The Netherlands vs Portugal wealth tax comparison reveals two fundamentally different philosophies:
- The Netherlands effectively taxes all forms of wealth—savings, investments, real estate, and crypto—through its Box 3 deemed return system. With a 36% tax rate on fictitious returns, the effective annual wealth tax can be substantial, particularly on investment portfolios.
- Portugal takes a targeted approach, only levying AIMI on high-value Portuguese real estate and leaving financial assets untouched by any wealth-related charge.
For expatriates, investors, and retirees choosing between the two countries, the wealth tax differential can be a major factor—especially for those with significant financial portfolios. However, wealth tax is only one piece of the puzzle. Income tax rates, capital gains treatment, inheritance tax, and lifestyle considerations all play a role.
Before making any decisions, model your specific situation using our Netherlands Wealth Tax Calculator and Portugal Wealth Tax Calculator. For a more complete picture, also explore our Netherlands Income Tax Calculator and Portugal Income Tax Calculator.
This article is for informational purposes only and does not constitute tax advice. Tax laws change frequently; consult a qualified tax professional for advice specific to your situation.