TL;DR: The Belastingdienst partially disclosed its approach to security requirements when substantial shareholders (5%+ ownership) emigrate outside the EU. The framework exists. Important details on calculation methodology, security amounts, and duration stay redacted. Planning to leave with substantial shares? Expect mandatory security requirements, limited transparency, and a serious liquidity impact.
Core Facts:
- Exit tax applies when you hold 5%+ shares and emigrate from the Netherlands.
- Security is mandatory for non-EU destinations (bank guarantee, real estate mortgage, or receivables pledge).
- Tax rates: 26.9% (up to €67k), 31% (€67k to €5M), 33% (above €5M).
- €5M unrealized gain creates €1.65M tax liability.
- Calculation methodology and security buffers stay undisclosed.
What the Woo Request Revealed
A Woo request (Dutch Open Government Act) asked the Belastingdienst to explain how it determines security requirements for founders emigrating outside the EU with substantial shareholdings.
The tax authority identified five documents. Released some information. Withheld the rest.
What got redacted:
- Personal data (Article 5.1(2)(e) of the Woo)
- System names and internal abbreviations (Article 5.1(2)(i))
- Taxpayer-specific calculations (Article 67 of the AWR)
You see the framework but not the calculation, so you cannot evaluate how the rules affect your specific situation. This lack of clarity exposes you to risks of unexpected tax demands or liquidity constraints.
This matters. The Belastingdienst has discretion over a process in which €1.65 million in liquidity is frozen on a €5 million unrealized gain.
How Exit Tax Works for Substantial Shareholders
The Fictional Sale Rule
When you hold 5% or more in a Dutch company and emigrate, the Netherlands treats your departure as a fictional sale.
You haven’t sold anything. You haven’t received cash. The Belastingdienst assesses the increase in value of your shares as if you sold them on departure.
The tax gets calculated under Box 2 income at these rates:
- 26.9% on gains up to €67,000
- 31% on the portion between €67,000 and €5 million
- 33% on gains above €5 million
Example: €5 million in unrealized appreciation creates a tax liability of approximately €1.65 million.
Key Point: This is the actual tax liability triggered at departure. Not a theoretical future obligation.
Why Security Is Required
The Belastingdienst issues a protective assessment when you emigrate. This preserves the tax claim indefinitely.
Since September 15, 2015, protective assessments for substantial shareholdings have no expiration. The claim stays open when you sell, transfer, or die.
If you move to an EU or EEA country, the Belastingdienst automatically grants an unconditional, interest-free deferral. No immediate payment. No security posting. You file annual status declarations confirming EU residency and asset ownership.
If you move outside the EU, you must provide security. The Belastingdienst won’t defer payment without this cover.
Security options:
- Bank guarantee: Most common, most liquid
- Real estate mortgage: Ties up property you might be leveraging elsewhere
- Receivables pledge: Requires complicated legal structuring
A bank guarantee is the cleanest option. Straightforward to arrange. Provides stable cover. But look at the timing. You’re relocating. You’re restructuring. The guarantee locks up liquidity or credit capacity when you need flexibility most.
Key Point: Security requirements are mandatory for non-EU immigration. Directly reduces available founder liquidity at departure.
What the Belastingdienst Withheld
The Woo request asked for specifics:
- Minimum duration of security requirements
- Scope of security relative to tax assessment
- Calculation methodology for determining the security amount
- Relationship between security, protective assessment, and assessment framework
The Belastingdienst searched across Corporate Service Technology, Central Administrative Processes, Large Enterprises, and the Knowledge and Expertise Center Abroad. Found five documents.
Released partial information.
What it redacted:
- Personal data (Article 5.1(2)(e), citing privacy above public interest)
- Application names and system codes (Article 5.1(2)(i), citing operational soundness)
- Taxpayer-specific information (Article 67 AWR, confidentiality in General Law on National Taxes)
In practice, you see the framework, not the calculation. While you understand the principle, you risk financial surprises because you cannot predict its application to your own case.
Why Opacity Creates Risk
The exit tax isn’t discretionary. The protective assessment is automatic. Security is mandatory for non-EU moves.
What remains opaque:
- Amount of security required
- Duration of obligation
- Specific calculation applied to your shares.
You may know the tax rate and the fictional sale trigger, but because of the withholding calculation models, you cannot see how the Belastingdienst determines the security buffer, models appreciation risk, or adjusts for liquidity constraints. This lack of transparency disrupts planning and decision-making.
This creates an imbalance. The tax authority holds full information. You operate with partial visibility. You post security but don’t see the process.
Key Point: Founders face mandatory security requirements. No access to the calculation models used by the Belastingdienst.
Three Urgent Pressures for Founders Leaving the Netherlands
If you own substantial shares and plan to emigrate outside the EU, these pressures hit immediately:
1. Liquidity Pressure
The exit tax comes due on unrealized gains. No sale happened. No proceeds in hand. The liability exists.
Moving to a non-EU country means posting a security bond. Security ties up cash, credit, or property. Flexibility gets cut when you need the room most.
2. Compliance Burden
If you get a deferral (through EU residency or negotiation), you must file annual status declarations.
These confirm:
- Your continued residency in the EU or EEA
- The location and ownership of relevant assets
- Any changes in circumstances that could trigger payment
Miss a filing. You face penalties. Loss of deferral. Enforced collection. A deferred liability turns into an immediate payment demand.
3. Structural Uncertainty
You don’t know the required security amount until you apply. You don’t know how the buffer gets calculated. You don’t know how future risk gets modeled.
Planning becomes difficult. You don’t model departure cost accurately. You don’t compare staying versus leaving. You don’t negotiate with full information.
Key Point: Exit creates three simultaneous pressures on liquidity, compliance, and planning. All while operating with incomplete information.
The 30% Ruling Transition (Closes in 2026)
Before January 1, 2025, expats with substantial shareholdings had an option to avoid Box 2 taxation on value growth. They used the partial foreign tax liability option under the 30% ruling.
The scheme ended on January 1, 2025. Expats now declare all income in Box 2 and Box 3.
Expats already under the scheme before 2024 got a transitional arrangement. They chose partial foreign tax liability in 2025 and 2026.
If you lived in the Netherlands before 2024, hold a substantial interest, and are considering emigration in 2025 or 2026, this transition window gives you a narrow opportunity. Exit tax avoidance is on the table.
The State Secretary appealed to the Supreme Court. Outcome is uncertain. The window closes at the end of 2026.
Key Point: Transitional 30% ruling arrangement offers exit tax avoidance for pre-2024 expats through 2026, pending Supreme Court decision.
What to Do If You’re Planning to Leave
If you hold 5% or more in a Dutch company and emigration is under consideration:
1. Model the Exit Tax Exposure
Calculate unrealized gain on your shares. Apply Box 2 rates. Determine the tax liability at departure.
Departure-day liability. Not a future problem.
2. Understand Security Requirements
Moving outside the EU? Assume security is required. Contact the Belastingdienst early to learn which form they’ll accept and how much they’ll demand.
A bank guarantee is the most liquid. Still ties up credit. Factor the cost into the relocation budget.
3. Check the 30% Ruling Transition
If you were under the 30% ruling before 2024 and plan to leave in 2025 or 2026, talk to a tax advisor now. The transition arrangement offers exit tax avoidance. The window is narrow. Legal outcome is uncertain.
4. File Status Declarations on Time
If you get a deferral, treat annual status declarations as hard compliance. Missing one triggers immediate collection.
5. Factor Exit Tax into Ownership Structure
If you’re building a company and considering an upcoming relocation, let the exit tax influence your decisions. Ownership structure. Dividend timing. Liquidity events.
The tax triggers on departure. Not on sale.
Frequently Asked Questions
What is a substantial shareholding in the Netherlands?
A substantial shareholding is ownership of 5% or more in a Dutch company. This threshold triggers the exit tax when you emigrate.
Do I pay exit tax if I move within the EU?
No immediate payment. The Belastingdienst grants automatic deferral for moves within the EU or EEA. You file annual declarations. You don’t pay or post security.
What security measures does the Belastingdienst require for non-EU emigration?
The exact amount is determined on a case-by-case basis. The method isn’t publicly disclosed. Expect the security to cover the full tax assessment or a large portion of the liability.
What happens if I miss an annual status declaration?
Missing a declaration results in penalties and the loss of deferral status. Enforced tax collection follows. The deferred tax becomes immediately due.
When does the exit tax trigger?
The exit tax triggers on the date you cease Dutch tax residency. Not when you sell shares. Departure creates the taxable event.
Does the 30% ruling still help avoid the exit tax?
Only for expats who were under the partial foreign tax liability scheme before 2024. They have a transition period through 2026. Everyone else faces the full regime. The scheme ended January 1, 2025.
What form of security is easiest to arrange?
A bank guarantee is the most common option. Straightforward. Real estate mortgages and receivables pledges require more complex structuring.
How long does the protective assessment last?
Indefinitely. Since September 2015, protective assessments for substantial shareholdings have no expiration date. The claim stays open when you sell, transfer ownership, or die.
Key Takeaways
- Exit tax applies automatically when you hold 5%+ shares and emigrate from the Netherlands. Unrealized gains trigger the tax.
- Security is mandatory for non-EU immigration. The Belastingdienst’s calculation methodology stays undisclosed.
- €5M unrealized gain results in approximately €1.65M in tax liability at departure.
- EU moves get automatic deferral without security. Annual compliance filings are required.
- The 30% ruling transition offers a narrow window to avoid an exit tax for pre-2024 expats. Available through 2026 only.
- Founders face liquidity pressure, continuing compliance burden, and planning uncertainty. Limited transparency drives the problem.
- Exit tax triggers on departure, not on share sale. You need advance planning and liquidity preparation.
