I. Introduction: a turning point for crypto taxation in Belgium
The introduction of a general capital gains tax as from 1 January 2026 marks a fundamental turning point in Belgian income tax law. For the first time, capital gains on financial assets realised by private individuals will, as a rule, be subject to a uniform tax at a rate of 10 percent, subject to a limited annual exemption. Crypto assets are explicitly included within the scope of this reform.
For crypto investors, this change is often presented as a move towards normalisation. Crypto assets are no longer treated as an exotic or marginal phenomenon, but as financial assets comparable to shares, bonds or investment funds. Political statements made during the parliamentary debates have reinforced this narrative by suggesting that the vast majority of crypto investors will fall under the standard capital gains tax regime.
That narrative, however, only tells part of the story. The new capital gains tax does not replace the existing tax framework applicable to crypto assets. Instead, it is superimposed on a legal architecture that continues to rely on the distinction between normal management of private wealth, speculative transactions and professional activities. As a result, the interaction between the new tax and the pre-existing concepts is likely to generate renewed legal uncertainty rather than resolve it.
This article examines how the new capital gains tax interferes with the taxation of crypto assets, why the distinction between normal and speculative behaviour remains central after 2026, and why crypto investors may face increased requalification risks in an environment of enhanced transparency and data-driven enforcement.
II. Crypto taxation before 2026: a fragmented and fact-driven regime
Before the introduction of the capital gains tax, Belgian tax law did not contain any crypto-specific provisions. The taxation of gains realised on crypto assets was instead derived from general principles of income tax law and administrative practice.
In broad terms, three possible tax treatments existed;
- Gains realised in the context of the normal management of private wealth were, in principle, not taxable. This approach was inspired by long-standing case law relating to traditional financial assets and required an assessment of whether the taxpayer behaved as a prudent private investor, without excessive risk-taking or short-term profit motives.
- Gains could be taxed as miscellaneous income at a flat rate of 33 percent where the transactions were considered speculative. This qualification depended on a factual assessment of elements such as the frequency and volume of transactions, the holding period, the use of leverage, the degree of organisation, and the proportion of the taxpayer’s overall movable wealth invested in crypto assets.
- Where crypto activities displayed a professional character, for example due to their scale, continuity or integration into a broader economic activity, gains could be reclassified as professional income and taxed at progressive rates.
This framework was inherently fragmented and uncertain. The absence of statutory thresholds meant that taxpayers were often left to navigate a grey zone, relying on administrative guidance, rulings or informal risk assessments. Crypto taxation was thus less a matter of applying clear legal rules than of managing factual exposure.
Importantly, under this pre-2026 regime, many private crypto investors effectively remained outside the tax net, either because their behaviour could be defended as normal wealth management or because enforcement was limited by information asymmetries.
III. Crypto assets as “financial assets” under the new capital gains tax
The new capital gains tax fundamentally alters this landscape by explicitly including crypto assets within its material scope. The draft legislation adopts a broad, EU-aligned definition of financial assets, encompassing digital representations of value or rights that can be transferred and stored electronically using distributed ledger technology or similar systems.
As a result, gains realised on crypto assets as from 1 January 2026 are, in principle, taxable at a rate of 10 percent, after application of an annual exemption of EUR 10,000 per taxpayer (indexed). Only realised gains are taxed; unrealised appreciation remains outside the tax base. Historical gains accrued before 2026 are likewise excluded, as the taxable event only occurs upon disposal after the entry into force of the new regime.
Unlike many traditional financial assets, however, crypto gains will not be subject to withholding at source. The tax is levied through the annual income tax return, placing the burden of correct qualification and reporting squarely on the taxpayer.
At first sight, this explicit inclusion of crypto assets appears to bring clarity. Crypto gains are no longer dependent on administrative tolerance or analogy; they are expressly taxable under a general regime. Yet this apparent clarity is deceptive. The new tax does not apply automatically to all crypto gains. Its application remains conditional on the gains being realised within the normal management of private wealth.
This conditionality is where the old framework re-enters the picture.
IV. Political assurances versus legal reality: the promise of “normal taxation”
During the parliamentary debates preceding the adoption of the capital gains tax, repeated efforts were made to reassure investors — and crypto investors in particular — that the reform was not intended as a punitive measure. Members of the Finance Commission and the Minister of Finance explicitly stated that crypto assets should not be presumed speculative by nature and that the vast majority of crypto investors would fall within the standard 10 percent capital gains tax regime.
These statements are not insignificant. They reflect a clear political intention to treat crypto assets as a legitimate component of private wealth rather than as an inherently suspect category. In that sense, the reform signals a shift away from the implicit distrust that long characterised administrative practice in relation to digital assets.
However, from a legal standpoint, these assurances must be treated with caution. Parliamentary statements and ministerial explanations form part of the legislative context and may guide interpretation, but they do not override the wording of the law itself. The statutory framework continues to rely on open-ended legal concepts such as “normal management” and “speculative behaviour”, without introducing crypto-specific safe harbours, quantitative thresholds or presumptions in favour of taxpayers.
As a result, the promise that most crypto investors will be taxed at 10 percent remains just that: a promise of intent rather than a legally enforceable guarantee. The decisive question will not be how crypto is framed politically, but how individual behaviours are assessed factually by the tax administration.
This gap between political narrative and legal reality is likely to become a focal point of future disputes.
V. The persistence of the normal versus speculative distinction after 2026
One of the most important — and often misunderstood — aspects of the new capital gains tax is that it does not abolish the traditional distinction between normal and abnormal management of private wealth. On the contrary, the draft legislation and its parliamentary works explicitly confirm that this distinction remains fully applicable.
Gains realised on financial assets, including crypto assets, only fall under the 10 percent capital gains tax if they are realised within the framework of normal wealth management. Where transactions exceed that framework, the existing qualification as miscellaneous income remains applicable, with taxation at a flat rate of 33 percent. In such cases, the annual exemption of EUR 10,000 does not apply.
This means that the new capital gains tax operates as a conditional regime. It offers a favourable and predictable rate, but only to the extent that the taxpayer can demonstrate that their behaviour does not amount to speculation. The reform therefore does not neutralise the speculative income category; it merely narrows its practical relevance for certain taxpayers while preserving it as a powerful requalification tool.
For crypto investors, this has far-reaching consequences. The same factual indicators that already played a role before 2026 remain decisive after the reform. Transaction frequency, turnover, holding periods, reinvestment patterns, automation, portfolio concentration and the overall coherence of the investment strategy continue to inform the analysis.
In practice, this creates a dual exposure. A crypto investor may correctly identify their gains as taxable under the capital gains tax regime, only to see that qualification challenged ex post on the basis that the underlying behaviour was speculative. The tax rate applicable to the same economic gain may therefore depend less on the nature of the asset than on the interpretation of the investor’s conduct.
This persistence of behavioural qualification explains why the capital gains tax does not bring full legal certainty to crypto taxation. It also explains why the reform may paradoxically increase disputes: once gains are systematically reported and taxed, the incentive for the tax administration to reassess their nature becomes stronger.
VI. From legal criteria to audit practice: how crypto behaviour will be assessed
Although the capital gains tax is framed as a general and neutral tax on realised gains, its practical application will depend heavily on how the tax administration assesses crypto behaviour in individual cases. This assessment will not be limited to the transaction that triggered the gain, but will typically involve a broader analysis of the taxpayer’s overall crypto activity.
In practice, tax audits do not operate on the basis of a single decisive criterion. Instead, they rely on a combination of indicators that, taken together, may suggest whether the taxpayer remained within the bounds of normal wealth management or crossed into speculative territory. These indicators include the number of transactions over a given period, the volume of capital deployed, the relative importance of crypto assets within the taxpayer’s movable wealth, and the degree of sophistication or automation used in executing trades.
What matters is not merely whether one threshold is exceeded, but whether the overall pattern of behaviour appears consistent with a long-term investment approach. A limited number of transactions does not automatically imply normal management, just as a higher transaction count does not necessarily point to speculation. However, as indicators accumulate, the factual burden tends to shift towards the taxpayer to justify why their behaviour should still be regarded as normal.
The introduction of the capital gains tax is likely to reinforce this pattern. Once crypto gains are routinely reported in tax returns, the tax administration will have both the incentive and the informational basis to verify whether the declared application of the 10 percent rate is justified. In that sense, the capital gains tax does not merely create a new tax liability; it also creates a new audit trigger.
VII. Transparency and data availability: a new enforcement environment for crypto
The increased audit exposure must be understood in light of the rapidly expanding data ecosystem surrounding crypto assets. The capital gains tax does not operate in isolation but is part of a broader shift towards data-driven tax enforcement.
At the European level, the extension of automatic information exchange to crypto assets through DAC 8 fundamentally alters the informational position of tax authorities. Crypto service providers will be required to report detailed information on transactions and account balances, including for platforms established outside the European Union but offering services to EU residents. This information will be transmitted to national tax administrations and integrated into their data warehouses.
At the domestic level, the extension of the Central Point of Contact to crypto-asset accounts further strengthens traceability. The tax administration will be able to identify the existence of crypto accounts and monitor balance evolutions over time. Combined with other databases and analytical tools, this allows for a reconstruction of behavioural patterns rather than a snapshot view of isolated transactions.
In this environment, inconsistencies become more visible. A taxpayer who declares crypto gains under the capital gains tax regime but whose activity profile resembles active trading may attract scrutiny even in the absence of any indication of fraud. The focus shifts from detection of concealment to verification of qualification.
The consequence is that crypto investors face a qualitatively different enforcement context after 2026. Where enforcement used to be constrained by limited information and high investigation costs, it will increasingly rely on automated cross-checks and risk scoring. This evolution does not change the legal criteria, but it significantly affects how often and how rigorously they are applied.
VIII. The risk of ex post requalification under the new capital gains tax
One of the most sensitive consequences of the new capital gains tax for crypto investors lies in the possibility of ex post requalification. This risk is not new, but it becomes significantly more acute once crypto gains are systematically reported and taxed.
A taxpayer may, in good faith, consider that their crypto investments fall within the scope of normal wealth management and declare the resulting gains at the 10 percent capital gains tax rate. At a later stage, however, the tax administration may reassess the same facts and conclude that the behaviour was speculative in nature. In that event, the legal consequence is not merely a difference in interpretation, but a substantial financial adjustment.
The applicable tax rate would shift from 10 percent to 33 percent, with the annual exemption no longer available. In addition, late payment interest and administrative penalties may apply. From the taxpayer’s perspective, the economic gain remains unchanged, yet its tax treatment deteriorates dramatically.
This risk is exacerbated by the inherent characteristics of crypto markets. High volatility, rapid price movements and short holding periods are common features of the asset class, even for investors who do not engage in systematic trading. In hindsight, such behaviour may easily be portrayed as speculative, particularly where gains are significant. The absence of clear statutory thresholds increases the discretionary margin of the tax administration and complicates the taxpayer’s defence.
The capital gains tax thus introduces a paradox. By taxing crypto gains more systematically, it also creates more opportunities for disagreement about their legal nature. In that sense, the reform may generate more litigation rather than less, especially during the first years of application when administrative practice and case law are still developing.
IX. Simplification or stratification? Assessing the impact of the reform on crypto taxation
From a policy perspective, the introduction of a general capital gains tax could have been an opportunity to simplify the taxation of crypto assets by replacing the speculative income framework with a clear and uniform regime. That option was ultimately not chosen.
Instead, the legislator opted for a layered system in which the new capital gains tax coexists with the traditional categories of miscellaneous and professional income. Crypto assets are fully integrated into this system, but without any specific adjustments that reflect their particular market dynamics.
As a result, the reform simplifies certain aspects of crypto taxation while complicating others. On the one hand, it removes the binary distinction between taxable and non-taxable gains by bringing normal crypto gains into the tax base at a moderate rate. On the other hand, it preserves all existing qualification risks and adds a new reporting and enforcement dimension.
For taxpayers, this means that the question is no longer whether crypto gains are taxable, but under which regime they fall. The answer to that question remains highly dependent on facts and circumstances, and therefore inherently uncertain.
This stratification is likely to shape both administrative practice and litigation in the coming years. Courts will be called upon to clarify how traditional concepts such as normal wealth management apply in a context where crypto investing has become mainstream and structurally taxed.
X. Flowchart (based on documents leaked during parliamentary procedure)
XI. Practical guidance and forward-looking considerations for crypto investors
In light of the new capital gains tax, crypto investors should not assume that compliance will be limited to reporting gains at a rate of 10 percent. The continued relevance of behavioural qualification means that attention must shift from individual transactions to the coherence of the overall investment profile.
Consistency will be a key factor. Investors who wish to rely on the capital gains tax regime should ensure that their conduct reflects a long-term investment approach rather than opportunistic trading. Sudden changes in behaviour, frequent reallocations between crypto assets, or systematic attempts to time the market may weaken the argument that gains fall within the scope of normal wealth management.
Documentation also becomes increasingly important. While Belgian tax law does not impose formal record-keeping obligations on private investors, contemporaneous evidence of investment intent, portfolio allocation and decision-making can play a decisive role in the event of an audit. In an environment where the tax administration has access to extensive transactional data, the taxpayer’s narrative must be credible and factually supported.
Investors who combine different strategies should be particularly cautious. The coexistence of long-term holdings and more active trading within the same asset class increases the risk that the administration will adopt a global view of crypto activities. Structural separation of strategies and clear operational boundaries may therefore be advisable.
Finally, it should be borne in mind that the capital gains tax will initially be applied in a context of limited administrative guidance and no case law. Early audits and disputes will likely shape the interpretation of key concepts. Proactive risk assessment and timely advice may therefore prevent costly reassessments at a later stage.
XII. Conclusion: crypto normalised, but not de-risked
The introduction of a general capital gains tax marks a decisive step in the normalisation of crypto taxation in Belgium. Crypto assets are no longer treated as peripheral or exceptional; they are explicitly recognised as financial assets whose gains contribute to the tax base.
At the same time, this normalisation should not be confused with legal certainty. The new regime does not displace the traditional distinction between normal and speculative behaviour, nor does it provide crypto-specific safe harbours. Instead, it integrates crypto into a layered system that combines moderate taxation with continued requalification risk.
For crypto investors, the key question after 2026 will therefore not be whether gains are taxable, but how they are characterised. The answer will depend less on the technological nature of the asset than on the factual reality of the investor’s conduct. In a landscape of enhanced transparency, extensive data exchange and growing administrative scrutiny, that conduct will be increasingly visible.
The coming years are likely to see a growing number of disputes as taxpayers and the tax administration test the boundaries of the new regime. These disputes will ultimately determine whether the promise of “normal taxation” for crypto assets translates into predictable outcomes or remains a fragile political narrative.
If you have any questions regarding the new Belgian capital gains tax and crypto assets, please feel free to contact the authors of this article, Jacques Malherbe and Rik Strauven.
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This newsletter does not constitute legal advice or a legal opinion. Please consult with a legal counsel of your choice before taking any action based on the information provided.