Dutch Parliament Approves New Box 3 Tax System: What Expats Need to Know (2028)

The Dutch Parliament has officially greenlighted a major overhaul of the Box 3 tax system, set to take effect on January 1, 2028. This reform marks a significant shift from taxing "fictive" (assumed) returns to taxing actual returns on investments.

For years, the Dutch wealth tax system has been a point of contention and legal battles. The Supreme Court ruled the previous system unlawful because it taxed people on returns they didn't actually make. The new system aims to fix this but introduces new complexities for expats and investors.

Overview of Changes

• Effective Date: January 1, 2028
• Core Principle: Tax is based on actual realized and unrealized gains, not assumed percentages.
• Tax Rate: A flat rate of 36% is proposed.
• Scope: Covers savings, stocks, bonds, crypto, and real estate.

Why the Change?

The current system assumes you make a certain return on your assets (e.g., assuming 5% return on stocks) regardless of whether the market goes up or down. This led to unfair situations where savers paid tax on interest they never earned.

The devastating Supreme Court ruling (the "Kerst-arrest") forced the government to design a system that taxes what people actually earn.

The Hybrid Model Explained

The new system is a "hybrid" model distinguishing between different types of assets:

1. Capital Growth Tax (Vermogensaanwasbelasting)

Applied to liquid assets like:

• Shares (stocks) and bonds
• Cryptocurrencies
• Savings

How it works: You pay tax on the total return each year. This includes:

• Direct income (dividends, interest)
• Realized gains (profit from selling)
• Unrealized gains (increase in value on paper)

2. Capital Gains Tax (Vermogenswinstbelasting)

Applied to illiquid assets like:

• Real Estate (investment property)
• Shares in family businesses/start-ups

How it works: You only pay tax on the value increase when you sell the asset. However, recurrent income (like monthly rent) is taxed annually.

Proposed Tax Rates

The proposed rate is 36% on the actual return.

There will still be a tax-free allowance (heffingsvrij vermogen), currently around €57,000 per person (2024), but the exact amount for 2028 is yet to be confirmed.

Impact on Expats

For expats in the Netherlands, this change is substantial.

1. 30% Ruling Holders

Currently, 30% ruling holders can opt for "partial non-resident status," effectively exempting them from Box 3 tax (except for Dutch real estate). However, this status is already being phased out and will be largely abolished by 2025/2027.

By 2028, most expats—even those with the 30% ruling—will likely be full tax residents for Box 3, subject to this new "actual return" tax.

2. Investment Strategy

The taxation of unrealized gains makes "buy and hold" strategies (like compounding ETFs) less tax-efficient than before, as the tax drag happens annually rather than being deferred until sale.

3. Administrative Burden

Banks and brokers will share data with the Belastingdienst, but expats with foreign accounts (e.g., in their home country) will face a higher administrative burden to report exact returns and value changes annually.

Common Questions