The Legal Challenges to Box 3 (Hoge Raad Rulings)

Key Takeaways

• In December 2021, the Dutch Supreme Court (Hoge Raad) ruled that the Box 3 deemed return system violated the European Convention on Human Rights (ECHR).
• The ruling — known as the Kerstarrest (Christmas ruling) — found that taxing fictional returns when actual returns were much lower was a disproportionate interference with the right to property.
• The government was forced to provide compensation (rechtsherstel) to taxpayers who had objected, and to introduce a transitional system.
• The legal battle is not over — further court cases are challenging the current transitional system and pushing for broader compensation.
• The Box 3 saga is the most significant Dutch tax law controversy of the 21st century.

Background: Why Box 3 Was Challenged

When Box 3 was introduced in 2001, the deemed return was set at 4% — a fixed percentage applied to all assets regardless of their actual returns. At the time, with interest rates around 4-5%, this was roughly in line with reality.

But as interest rates fell over the following two decades — eventually reaching near-zero — the gap between the deemed return and actual returns widened dramatically:

For someone with €200,000 in savings earning 0.1% interest (€200), the tax authority deemed them to have earned 4% (€8,000) and taxed them 30% on that: €2,400 — more than 12 times their actual earnings.

This created a situation where people were effectively paying wealth tax far exceeding their actual income from that wealth.

The First Challenges (2015-2019)

Multiple taxpayers and tax advisors began challenging Box 3 through the courts. The main legal arguments were:

1. Article 1 of Protocol 1 (ECHR) — the right to peaceful enjoyment of property. Taxing fictional income that vastly exceeds actual income amounts to a confiscatory tax.
2. Article 14 (ECHR) — prohibition of discrimination. The system treated all taxpayers the same regardless of their actual investment returns.

The lower courts (rechtbank and gerechtshof) produced mixed results. Some accepted the arguments but concluded the legislature had a wide margin of appreciation (beoordelingsmarge) in designing tax systems.

The 2017 Reform — Not Enough

In 2017, the government reformed Box 3 by introducing differentiated deemed returns based on asset size. Larger portfolios were assumed to contain more investments (higher return) and less savings (lower return). This was an improvement, but it still did not account for individual circumstances.

The system used a bracket approach rather than actual asset composition:

This meant someone with €1,000,000 entirely in savings was taxed as if 79% was in investments — clearly inaccurate.

The Kerstarrest — December 24, 2021

On Christmas Eve 2021, the Hoge Raad issued its landmark ruling (ECLI:NL:HR:2021:1963), widely known as the Kerstarrest (Christmas ruling).

What the Court Found

1. The Box 3 system as applied from 2017 onward violated Article 1 Protocol 1 ECHR (right to property) in conjunction with Article 14 ECHR (non-discrimination).
2. The system was disproportionate because it taxed assumed returns that had no reasonable connection to the taxpayer's actual situation.
3. The court provided legal remedy itself rather than sending the case back to the legislature. It ruled that the taxpayer should only be taxed on actual returns (werkelijk rendement).

The Immediate Impact

The ruling applied to the specific taxpayer in the case — but the government quickly recognized it had implications for millions of tax returns:

• Approximately 60,000 taxpayers who had filed formal objections (bezwaar) against their Box 3 assessments were in line for automatic compensation.
• Millions more who had not objected initially appeared to be excluded.

The Government's Response: Rechtsherstel

In early 2022, the State Secretary for Finance announced the "rechtsherstel" (legal remedy) program:

The Bridging Legislation (Overbruggingswetgeving)

Starting from the 2023 tax year, the government introduced a new calculation method — the current system described in our How Box 3 Works article:

• Three categories: savings, investments, debts
• Different deemed return per category based on market averages
• Deemed returns set retroactively based on actual market data

This was intended as a temporary fix until a fundamentally new system could be designed.

Compensation for Past Years

For the years 2017-2022, the Belastingdienst recalculated Box 3 for taxpayers who had objected:

• They compared the original assessment with a recalculation using the new category-based method
• If the new calculation was lower, the taxpayer received the difference as a refund
• If the original was already lower, nothing changed (no additional tax owed)

The "Mass Objection" Question

Hundreds of thousands of taxpayers who had not individually objected argued they should also receive compensation. Several organizations filed mass objections (massaal bezwaar) on behalf of large groups.

In June 2022, the Hoge Raad ruled on a related case and confirmed that non-objectors were generally not entitled to automatic compensation. This was controversial and led to further litigation.

Ongoing Legal Battles (2023-2026)

The legal challenges did not end with the Kerstarrest. Several issues remain in dispute:

Challenge 1: Is the Bridging Legislation Itself Legal?

The transitional system (2023 onward) still uses deemed returns — just better-calibrated ones. Taxpayers whose actual returns are below even the new deemed percentages argue that the system still violates the ECHR.

For someone who held 100% savings in 2024 and earned 0.5% interest, the 1.03% deemed return is still double their actual return. Is this proportionate?

Courts are still adjudicating this question. As of early 2026, lower court rulings have been mixed.

Challenge 2: Non-Objectors' Rights

Multiple cases are ongoing about whether taxpayers who did not formally object should be entitled to compensation. The argument is that the right to property is a fundamental right that should not depend on procedural formalities.

The European Court of Human Rights in Strasbourg could ultimately weigh in on this question.

Challenge 3: "Actual Return" Definition

The Kerstarrest said taxpayers should be taxed on their actual return — but what counts as "actual return"?

• Does it include unrealized gains (your stocks went up but you did not sell)?
• Does it include imputed rental value of a second home you use yourself?
• How do you handle years with losses? Can you carry losses forward?

These definitional questions are crucial for the design of the new Box 3 system.

Challenge 4: Double Taxation on Rental Property

Some taxpayers argue that rental property in Box 3 is effectively taxed twice: once through the deemed return on the property value, and again through income tax on the rental income (which is theoretically captured by the deemed return but often does not match). This argument has not yet succeeded in court but continues to be raised.

Timeline of Key Events

What This Means for You

If You Objected to Past Assessments

If you filed a timely objection (bezwaar) against your Box 3 assessment for any year 2017-2022, you should have received a recalculated assessment and potential refund. If you have not, contact the Belastingdienst.

If You Did Not Object

Your options are more limited, but legal developments are ongoing. Some tax advisors recommend filing a verzoek om ambtshalve vermindering (request for administrative reduction) for years still within the 5-year window, citing the ECHR violation.

For Current and Future Tax Years

The bridging legislation (2023 onward) is the law. You must file under the current deemed return system. If your actual returns are significantly below the deemed percentages, you may want to:

1. File your return on time and then object (bezwaar) within 6 weeks
2. This preserves your rights if courts later rule the current system is also unlawful
3. Consult a tax advisor for your specific situation

Common Mistakes

1. Assuming the issue is fully resolved — The legal challenges are ongoing. The bridging legislation is still being tested in courts.
2. Not filing objections — The Kerstarrest showed that those who objected received compensation while those who did not were left out. Protecting your rights requires action.
3. Thinking you can skip Box 3 reporting — The system is still in force. You must report your assets regardless of legal challenges.
4. Relying on old information — This area changes frequently. Check for updates before making decisions.

What to Read Next

• Upcoming Box 3 Reforms — What the new system will look like
• How Box 3 Taxation Actually Works — The current calculation method
• Box 3 Strategies — Optimizing under the current rules
• Box 3 Overview — The complete picture