Leaving Belgium: Belgian Exit Tax 2026 and EEA Deferral

Last updated: 21 May 2026

On this page:
1. What is the Belgian exit tax?
2. When does the exit tax trigger?
3. Which assets are covered?
4. How is the exit tax calculated?
5. EEA deferral and treaty countries
6. Outside the EEA: deferral with security
7. Sell before leaving or hold?
8. Practical checklist

Introduction

Since 1 January 2026, Belgium has had a new 10% capital gains tax on realised capital gains on financial assets, introduced by the Belgian Law of 6 April 2026, Belgian Official Gazette (BS) 21 April 2026, NUMAC 2026002780 (source in Dutch — no English version of the Belgian Official Gazette published; retrieved 2026-05-20). What few investors know: the same law also introduces a so-called Belgian exit tax. Anyone who relocates their tax residence or the seat of their wealth abroad is deemed by law to have sold all their financial assets — even if they have not actually done so.

The good news: for those leaving for an EU member state, a European Economic Area (EEA) country (Norway, Iceland, Liechtenstein) or a treaty country that provides tax cooperation with Belgium, automatic deferral of payment for two years applies. If you do not sell any assets during that period, the exit tax lapses entirely. This article explains how the mechanism works, which countries qualify, and what choices you have before leaving.

1. What is the Belgian exit tax?

The Belgian exit tax is not a standalone tax. It is built into the new capital gains tax through article 92, §2, 2° of the Belgian Income Tax Code 1992 (ITC92) (source in Dutch; retrieved 2026-05-21), as introduced by the Belgian Law of 6 April 2026. The principle is straightforward: at the moment you leave Belgium, the law assumes that you have sold all your financial assets on that date at market value. This is called a deemed disposal.

In practice: if your ETF portfolio has an unrealised capital gain of €50,000 above your acquisition price on your departure date (or the reference value of 31 December 2025 if that was higher — see § 4), exit tax of 10% is in principle due on that amount — or €5,000 — even though you have never sold those ETFs.

The exit tax exists to prevent tax flight. Without this mechanism, someone could wait until their portfolio has a large unrealised gain, emigrate to a country without a capital gains tax, and then sell the assets tax-free. The exit tax cuts off that route.

Practical takeaway: The exit tax is not designed to penalise leaving Belgium — it is designed to prevent tax avoidance through emigration. For those who emigrate honestly and simply hold on to their assets, the EEA deferral mechanism provides the most protection.

2. When does the exit tax trigger?

The exit tax is triggered by two separate events. It is sufficient that one of the two occurs:

Trigger 1: Transfer of tax residence
You leave Belgium definitively and deregister from the municipality. You establish your tax residence (domicile) abroad. It is that date of actual departure — usually the date of deregistration from the National Register — that counts as the departure date for the exit tax.

Trigger 2: Transfer of the seat of their wealth
Belgian personal income tax also ties fiscal residence to the seat of their wealth: the place from which a person manages their assets (article 2, §1, 1° ITC92 (source in Dutch; retrieved 2026-05-20)). Someone who formally keeps their residence in Belgium but transfers all their financial management, investment accounts and asset decisions entirely abroad can also trigger the exit tax — even without a formal deregistration.

This second trigger is rare and requires a factual assessment by the tax authorities. In practice it mainly applies to high-net-worth taxpayers who split their formal residence from their economic life. For most ordinary investors who leave Belgium through regular emigration, trigger 1 is the relevant situation.

Practical takeaway: The date of your deregistration from the National Register is your legal departure date. Document your portfolio values carefully on that date — that value becomes your taxable basis for the exit tax.

3. Which assets are covered?

The exit tax follows the same asset definition as the regular capital gains tax. The following financial assets are included (Belgian Law of 6 April 2026 (source in Dutch; retrieved 2026-05-20)):

Asset class	Included?
Shares (listed and unlisted)	Yes
Bonds and debt instruments	Yes
ETFs and investment funds (accumulating and distributing)	Yes
Derivatives (options, futures, warrants)	Yes
Branch 21, 23 and 26 insurance contracts	Yes
Crypto-assets	Yes
Investment gold and investment currencies	Yes
Belgian real estate	No (separate regime)
Pension savings (3rd pillar)	No (own fiscal framework)
Group insurance (2nd pillar)	No (own fiscal framework)

Important nuance: Shares in a company where you hold a significant shareholding (≥ 20% of the voting rights or capital) fall under a separate regime with an exemption of €1,000,000 over a rolling 5-year period and progressive rates (1.25%–5% up to €10M, then 10%). The interaction with the exit tax will be addressed in a follow-up article (EL-08).

4. How is the exit tax calculated?

Tax base

The taxable capital gain at departure is the positive difference between:
– Market value on the departure date (closing price on the date of deregistration for listed assets)
– Acquisition value (the lower of: actual purchase price or reference value of 31 December 2025)

In practice: if you bought an ETF for €20,000 before 2026, the price on 31 December 2025 was €35,000, and the ETF stands at €40,000 on your departure date, your taxable capital gain is €5,000 (€40,000 – €35,000). The historical gain of €15,000 before 2026 is exempt thanks to the reference value.

Rate and exemption

The exit tax amounts to 10% of the taxable capital gain (article 90, §1, 9°, c ITC92 (source in Dutch; retrieved 2026-05-20)).

There is some legal uncertainty over the annual exemption of €10,000 and the maximum carry-forward of €15,000 (5 × €1,000 per year) in the exit tax context (see reviewer notes). Based on available information (EY tax alert, retrieved 2026-05-20) the standard annual exemption appears in principle to apply — but the precise modalities for the deemed disposal situation have not yet been officially confirmed by FPS Finance.

Example:
– Portfolio value on departure date: €180,000
– Reference value 31/12/2025: €120,000
– Taxable capital gain: €60,000
– Minus annual exemption (indicative): €10,000
– Taxable base: €50,000
– Exit tax (10%): €5,000

5. EEA deferral and treaty countries

For those departing to a qualifying destination, there is good news: the exit tax does not need to be paid immediately.

Automatic deferral of payment

Automatic deferral of payment for two years applies when you transfer your tax residence to (EY tax alert, retrieved 2026-05-20):

An EU member state (France, the Netherlands, Germany, Spain, Portugal, Italy, etc.)
An EEA country (Norway, Iceland, Liechtenstein — non-EU but EEA)
A treaty country that has concluded a double taxation treaty with Belgium providing both information exchange and mutual assistance in tax collection

You do not need to apply for anything: the deferral is automatic. You must mention your departure and the taxable capital gains in your personal income tax return for the year of departure, but payment is suspended.

The 24-month rule

During the two-year deferral period, two rules apply:

Do you sell assets within 24 months after departure? Then the deferral lapses for those assets and the exit tax becomes immediately due in Belgium — even if you are already domiciled at your new address.
Do you sell nothing within 24 months? Then the exit tax lapses entirely. You owe nothing.

Returning to Belgium within 24 months without selling assets has the same effect: the exit tax lapses (and your original acquisition value is retained).

Decision tree: Belgian exit tax 2026. EU/EEA/treaty countries: automatic 2-year deferral. No sale within 24 months → tax lapses.

Practical takeaway: The EEA deferral measure is the reason why most Belgians emigrating to a neighbouring EU country in practice never pay the exit tax — as long as they keep their investment portfolio intact for two years.

6. Outside the EEA: deferral with security

Those leaving for a country that does not qualify for automatic deferral — such as the UAE, Monaco, or countries without an adequate treaty clause — can still request deferral. The conditions are stricter:

Active request: You must apply for deferral yourself with FPS Finance.
Provide security: You must provide sufficient security for the outstanding tax liability. This can be done via a bank guarantee, a pledge on securities, or a deposit with the Deposit and Consignment Office (Deposito- en Consignatiekas) (source in Dutch — no English version available; retrieved 2026-05-20).
Annual confirmation: You must annually confirm to the Belgian tax authorities that the assets have not been sold and that you comply with the conditions.

The security is released after 24 months (if no assets were sold) or when you return to Belgium.

Countries that may not qualify for automatic deferral (and therefore require security): UAE, Monaco, Singapore, and countries without a full double taxation treaty with mutual assistance in collection. The exact list of qualifying treaty countries has not yet been published by FPS Finance (see reviewer notes). Switzerland and the United States do have treaties with Belgium, but whether those treaties contain the collection assistance clause required for qualification is subject to professional debate (EY tax alert, retrieved 2026-05-20).

7. Sell before leaving or hold?

Those emigrating have a strategic choice: sell assets before the departure date (and settle definitively) or hold them and use the EEA deferral mechanism.

Option A: Sell before departure

You realise the capital gains before your departure date. You pay the Belgian capital gains tax of 10%, but you have a clean slate at the moment of departure. Advantages:
– No exit tax risk
– No two-year monitoring obligation
– Free to start a new investment strategy in your new country with a step-up in acquisition value

Disadvantage: you pay the tax now, while with option B you might pay nothing at all.

Option B: Hold and use EEA deferral

You leave for an EU/EEA country or qualifying treaty country, hold your assets for 24 months, and the exit tax lapses. Advantages:
– If you want to hold the assets for more than 24 months after departure: you effectively pay no exit tax
– If you expect your new country of residence to have more favourable asset tax rules: you can sell after 24 months under the local regime

Risk: if within 24 months you nevertheless need or want to sell — due to financial need, a market crash, or an investment opportunity — the Belgian exit tax becomes immediately due. You are also then required to file a return in Belgium.

Key consideration: tax regime in the new country of residence

Always check what capital gains tax your new country applies, before deciding to hold:

France: 31.4% “prélèvement forfaitaire unique” (PFU) on capital gains since 2026 (12.8% income tax + 18.6% social contributions, following the increase in the CSG by the LFSS 2026; source: service-public.gouv.fr, retrieved 2026-05-21).

Netherlands: box-3 deemed-return levy 36% on a notional return (1.28% savings / 6.00% investments in 2026); Supreme Court case law has required since 2024 that the actual return is followed if it is lower (transition to actual-return system postponed until 2028; source: belastingdienst.nl, retrieved 2026-05-21).

Spain: 19% to 30% progressive rate on capital gains (19% up to €6,000, then in brackets up to 30% above €300,000 since Ley 7/2024; source: PwC Tax Summaries Spain, retrieved 2026-05-21).

Germany: 25% Abgeltungsteuer on capital gains, +5.5% Solidaritätszuschlag on the levy (effective ~26.375%), possibly +church tax 8–9% for members (source: n26, retrieved 2026-05-21).

In countries with a higher capital gains tax than Belgium, it may be more advantageous to pay the tax in Belgium and have a clean portfolio after departure. In countries with a lower rate, option B is more attractive.

Practical checklist

[ ] Determine your departure date (deregistration from the National Register) — that is your fiscal departure date for the exit tax.
[ ] Calculate your unrealised capital gains on the planned departure date: market value minus reference value of 31/12/2025 (or actual purchase price if that was higher).
[ ] Check the destination: does your new country fall in the EU/EEA category or does Belgium have a qualifying double taxation treaty? → automatic deferral. If not: apply for deferral and arrange security.
[ ] Decide: option A (sell) or option B (hold)? Compare the Belgian capital gains tax of 10% with the rate in your new country of residence and the risk that you sell within 24 months anyway.
[ ] Keep portfolio documentation: save account statements from your departure date (prices per asset) for evidentiary purposes.
[ ] Consult a tax adviser for significant unrealised capital gains (€50,000+) or emigration to a non-EU/EEA country. The exit tax is relatively new and the implementing rules have not been fully published.
[ ] Do not forget your Belgian tax return: for the year of departure you file a split return (resident part + non-resident part). Exit tax documentation belongs with the return for the year of departure.

Sources & further reading

Belgian Law of 6 April 2026 on fiscal and social provisions relating to the capital gains tax, BS 21 April 2026, NUMAC 2026002780 (source in Dutch; retrieved 2026-05-20)
Belgian Income Tax Code 1992 (ITC92) — consolidated text via ejustice (source in Dutch; retrieved 2026-05-20)
EY Belgium — New Belgian Capital Gains Tax: Implications for Expatriates (tax alert) (retrieved 2026-05-20)
PwC Belgium — Belgium’s comprehensive capital gains tax changes: key updates and implications starting January 2026 (retrieved 2026-05-20)
Curvo — Investor’s guide to the Belgian capital gains tax (retrieved 2026-05-20)
Van Havermaet International — New Belgian capital gains tax: importance in a cross-border context (retrieved 2026-05-20)

Fieldfisher Belgium — Exit tax or rather stay tax (via Mondaq) (Fieldfisher author; cross-published via Mondaq, retrieved 2026-05-21)

Deposit and Consignment Office (Deposito- en Consignatiekas) — security for non-EEA deferral (source in Dutch — no English version available; retrieved 2026-05-20)

Leaving Belgium: Belgian Exit Tax 2026 and EEA Deferral

Introduction

1. What is the Belgian exit tax?

2. When does the exit tax trigger?

3. Which assets are covered?