Crypto Tax in Belgium 2026: The 10% Tax Explained

For fifteen years, the Belgian answer fitted in one sentence: a private investor who managed their assets in the ordinary, prudent way (“en bon père de famille”) paid nothing on capital gains. That sentence died on 1^st January 2026. The law of 6 April 2026 introducing a tax on capital gains on financial assets creates a new category of miscellaneous income and taxes it at 10%, after an annual allowance of €10,000. Crypto-assets are named explicitly.

The detail almost nobody has taken in is the date. The law was published in the Moniteur belge, Belgium’s official gazette, on 21 April 2026, but its Article 35 provides: “This law takes effect on 1^st January 2026.” Thousands of Belgians therefore sold, swapped or converted in the first quarter of 2026 under a regime they didn’t yet know about.

What follows covers 2026 income, declared in 2027, and is up to date as of 3 September 2026. Every figure is tied to a text, with the link provided. And because you probably trade something other than spot, this article covers what no Belgian guide covers: derivatives, leverage and perpetual contracts. When the law says nothing, we say so instead of making things up.

The essentials at a glance

• 10% on capital gains realised since 1^st January 2026, after an allowance of €10,000 per individual — and with no municipal surcharges (the “centimes additionnels communaux”).
• For everything you held before 2026, the acquisition value used is that of 31 December 2025: the earlier capital gain is permanently out of scope.
• This snapshot is symmetrical: it ring-fences your past gains, but it also cuts off your past losses.
• Every swap is a taxable disposal, conversion into a stablecoin included. A hundred exchanges, a hundred taxable events, without ever touching a euro.
• Derivatives are in the same basket as spot: options, futures, swaps and CFDs are financial assets by cross-reference in the law, taxed at the same rate of 10%.
• A consequence nobody writes about: a loss on perpetuals offsets a spot or equity gain of the same year, because the law works by category, not by type of asset — but no carry-forward to the following year.
• The historic 33% regime for transactions going beyond normal management remains, and it takes precedence: leverage is a classic indicator of it.
• Leaving Belgium triggers a deemed disposal of your whole portfolio; arriving, by contrast, gives you a step-up.
• No wealth tax, no withholding on spot — but Article 313 of the Income Tax Code 1992 (CIR 92) requires you to declare your crypto capital gains in all cases.

The switchover, and what you needed to have done before it

Belgium has never had a crypto-specific regime. It had a three-tier architecture born of case law: normal management of private assets (exempt), transactions going beyond that normal management (33%), professional activity (progressive scale). The law of 6 April 2026 doesn’t replace it: it fills the first tier, which was empty.

Date	Event
17 December 2025	Bill tabled in the Chamber (DOC 56 1244/001) with its explanatory memorandum.
1st January 2026	Effective date chosen by the future text — the law doesn’t exist yet.
21 April 2026	Adoption in the Chamber on the night of 3–4 April, then publication in the Moniteur belge: the rule becomes knowable.
1st June 2026	Start of withholding at source by Belgian intermediaries (Article 35, paragraph 2).
22 July 2026	First administrative circular, 2026/C/74; opt-out windows closed on 31 August.

An honest caveat, and it’s a big one: the scheme is already being challenged. The deadline for actions for annulment before the Constitutional Court runs for six months from publication, i.e. until 21 October 2026, and so isn’t closed as we write. Three applications were already on the docket under numbers 8661, 8662 and 8663 as early as May 2026, and professional commentators counted six, filed or announced, by the end of summer. The known grounds of challenge target the text’s deliberate retroactivity, the difference in treatment created by the withholding-tax opt-out, and the non-deductibility of transaction costs. The outcome is unknown to us — and an annulment ruling could call into question all or part of the scheme.

The snapshot of 31 December 2025

This is the text’s most favourable provision, and the one that demands the most discipline. For any financial asset acquired before 1^st January 2026, Article 102, § 4 uses the value on 31 December 2025 as the acquisition value. A bitcoin bought for €3,000 in 2017 and resold in 2026 isn’t taxed on its entire rise: only the portion after 31 December 2025 enters the tax base.

You still have to be able to prove two things: that you did hold the asset on that date, and at what value. The law sets the method for assets “listed on a regulated market or on any other open, regularly active market” — the second limb, under which a crypto exchange naturally falls: it’s the “last closing price of the year 2025”. The text mentions no time of day — if you read somewhere “at the 31 December rate at 23:59”, that’s an invention, and nothing requires one price source over another either. For unlisted assets, a valuation by a company auditor (“réviseur d’entreprises”) or a certified accountant who isn’t your usual professional can be drawn up until 31 December 2027.

And here’s the penalty, written into the law and not into a circular: in the absence of conclusive evidence of the acquisition value, “the taxable capital gain corresponds to the price or value received”. Your entire sale price then becomes taxable. This is the zero-cost fiction, and that’s why a trading journal kept line by line is worth far more in Belgium than mere organisational convenience.

On the moment that counts, circular 2026/C/74 goes further than the law: its point 18 sets realisation at the transaction date, the trade date, and not at the settlement date, because at that date the price is final and the investor contractually bound. The wording is written for banking investment products, and nothing in it expressly extends the solution to a crypto order book — it nonetheless remains the most coherent reading. A word on method: the official document is served by a viewer that we couldn’t open; we cite its points from published reproductions, never as a text we read ourselves.

The symmetry trap

Everyone presents the snapshot as a gift. It cuts both ways. Article 102, § 5, subparagraph 3 also measures capital losses against the value on 31 December 2025, and not against your real purchase price.

A bag bought for €100,000 at the 2021 top, worth only €40,000 on 31 December 2025 and which you sell for €30,000 in 2026, doesn’t generate €70,000 of deductible loss. It generates €10,000. The €60,000 of earlier loss is out of scope, exactly as earlier gains are.

Opting for the real acquisition price changes the calculation method

By default, the law applies FIFO: “the first financial asset acquired is deemed to be the first financial asset disposed of”. But Article 102, § 4, subparagraph 4 provides, for disposals made up to 31 December 2030, an option to use the real acquisition price of an asset acquired before 2026.

What almost no source says: this option doesn’t only change the starting figure. It switches the calculation, “by derogation from paragraph 1^er, subparagraph 4”, towards the average acquisition value per financial asset — from FIFO to weighted average cost. On a portfolio built up through scheduled purchases, the two methods don’t give the same result. And the option isn’t conditional on the 31 December 2025 value being lower than the price you paid.

Three overlapping regimes, only one of which applies to your whole portfolio

This is the Belgian peculiarity, and it survives the reform. The new 10% tax applies only if your activity falls within the normal management of private assets. If it goes beyond that, the 33% regime takes precedence. If it becomes professional, it’s the progressive scale.

Regime	Rate	Allowance	31/12/2025 snapshot	Deductible costs	Loss carry-forward
Normal management (Article 90, 9°, c))	10%, no surcharges	€10,000	Yes	No	None
Going beyond it, or speculation (Article 90, 1°)	33% + municipal surcharges	None	No	Yes	Five years
Professional activity	Progressive scale + surcharges + social contributions	None	No	Yes	Yes

Read the 33% row carefully, especially the allowance and snapshot columns. Switching doesn’t cost “23 points more”: it loses you the allowance and the snapshot, and therefore makes the entire capital gain since the real acquisition taxable, pre-2026 gains included. A portfolio built in 2017 and reclassified doesn’t see its bill go up by a quarter: the bill changes by an order of magnitude.

In return, the 33% regime isn’t all drawbacks. The costs you can show you incurred to acquire or keep this income are deductible there (Article 97, § 1^er of the CIR 92), and the losses of the five previous tax periods can be set against it (Article 103, § 1^er). Where the 10% regime offers no carry-forward, the 33% one offers five years.

What tips you over, and what doesn’t

There’s no fixed grid. No number of trades, no holding period, no leverage level automatically triggers reclassification. The assessment is global and in concreto, based on a body of indicators drawn from case law: frequency and repetition of transactions, speed of turnover, use of borrowing or leverage, abnormal risk, use of automated tools, share of crypto-assets in total wealth, origin of funds, the taxpayer’s training. None is decisive on its own. And the principle remains that it’s for the tax authorities to establish that you’ve gone beyond normal management, not for you to prove your normality — though note that circular 2026/C/74 doesn’t settle the question: it merely confirms that the new regime doesn’t touch Article 90, paragraph 1^er, 1°.

Two practical consequences. The switch is global: it’s impossible to have a long-term position at 10% and a trading position treated differently. And in case of serious doubt, the safe route is an advance decision from the Advance Ruling Service (the “Service des décisions anticipées”) — a ruling, which assesses your situation as a whole and binds the tax authorities.

Derivatives are in the same basket as spot

Derivatives are missing from every Belgian tax guide, which all stop at spot: buying, selling, swapping, staking. None answers the question a Belgian trader asks: do my perpetuals, my futures and my CFDs fall under the same regime as my spot? The answer is in the law, and in principle it’s clear-cut.

The chain of texts, in two links

First link: Article 92, § 1^er, a) of the CIR 92, reinstated by the law of 6 April 2026, lists among financial assets “the financial instruments referred to in Article 2, 1°, a) to k), of the law of 2 August 2002 on the supervision of the financial sector”.

Second link: that Article 2, 1° reproduces the MiFID list. Its letter i) covers, word for word, “financial contracts for differences”, with no condition whatsoever on the underlying: that’s the solid link, and a cash-settled perpetual is functionally one.

Its letter d) calls for more caution. It does cover “option contracts, firm forward contracts (futures), swap contracts, forward rate agreements and all other derivative contracts”, but the sentence doesn’t stop there: it limits them to contracts “relating to securities, currencies, interest rates or yields, emission allowances or other derivative instruments, financial indices or financial measures”. Crypto-assets aren’t named. If you read somewhere a quotation of letter d) that stops at “all other derivative contracts”, it’s a truncation that makes it say the opposite of its own text.

Only letter l), which covers securities designated by royal decree, is excluded from the cross-reference. And this debate over letter d) doesn’t change the outcome: a crypto derivative that didn’t fall into the list of financial instruments would remain a crypto-asset under letter c) of Article 92.

Whether your crypto derivative is classified as a financial instrument (letter a) of Article 92) or as a crypto-asset (letter c)), the capital gain falls in both cases under the residual category c) of Article 90, paragraph 1^er, 9°, taxed at 10%. The rate doesn’t depend on the classification. The collection mechanism, on the other hand, does — we’ll come to that.

A loss on perpetuals offsets a spot gain of the same year

Here’s the consequence nobody writes about, and it’s worth real money. Article 102, § 5, subparagraph 1^er provides that capital gains “are reduced by the capital losses realised by the same taxpayer during the same tax period in the same category of financial assets referred to in Article 90, paragraph 1^er, 9°, a), b) or c)”.

“Same category” doesn’t mean “same type of asset”. Category c) covers, without distinction, crypto spot, derivatives, shares, ETFs, bonds and investment gold. The offsetting is therefore cross-asset: a loss on perpetuals offsets an equity gain, and vice versa. That isn’t a bold reading: responding to the Council of State, the explanatory memorandum states that it wouldn’t be “objectively justified to limit the offsetting of capital losses only to capital gains realised on financial assets of the same nature”, and expressly cites the four letters of Article 92, § 1^er — financial instruments, insurance products, crypto-assets, investment gold — as sufficiently similar to offset one another. Many traders will pay a tax they didn’t owe, because they failed to declare their derivatives losses in the same category.

The corollary is brutal: no carry-forward from one year to the next. The offsetting is limited to the same tax period. A year of drawdown on perpetuals, with no gain to set it against in the same year, is lost for tax purposes. On this precise point, France does the opposite: its regime for forward financial instruments allows losses to be carried forward over ten years — see our article on crypto tax in France.

Withholding at source: the reason is legal, not practical

You’ll read everywhere that crypto spot is exempt from withholding tax “because the platforms are foreign”. That’s false, and the real argument is much stronger. Article 261, paragraph 1^er, 5° of the CIR 92 covers only intermediaries established in Belgium involved in transactions relating to the financial assets of Article 92, § 1^er, a) and b): financial instruments and insurance contracts. Neither letter c), crypto-assets, nor letter d), funds and investment gold. The Council of State put it in black and white in its opinion on the preliminary draft: within the residual category, withholding is possible “only for the assets referred to in Article 92, § 1^er, a) and b) […] but not for the assets mentioned in Article 92, § 1^er, c) […] and d)”.

Translation: a derivative held with an intermediary established in Belgium has been subject to the 10% withholding since 1^st June 2026. Crypto spot, never — even with a Belgian provider. Hence a very common piece of advice online, and a wrong one: there was no crypto opt-out to notify before 31 August 2026. That window concerned securities accounts, derivatives and insurance contracts. In practice, the supply of crypto derivatives from an intermediary established in Belgium remains marginal, and that’s no commercial coincidence: the FSMA regulation approved by the royal decree of 21 July 2016 forbids marketing leveraged over-the-counter derivatives to consumers in Belgium. For the vast majority of traders, withholding therefore doesn’t apply and declaring in your return remains the rule — bearing in mind that even if a foreign offering is unlawful, the tax on the positions you’ve taken there doesn’t disappear. And if withholding does apply to you, note that it’s made without taking account of the €10,000 allowance or of your capital losses: any excess is reclaimed in your return, supporting documents attached.

Leverage, and forced liquidation

Use of borrowing and of leverage is among the classic indicators of a transaction going beyond normal management. We’ve seen what the switch really costs: 33% plus municipal surcharges — whose rate has to be checked municipality by municipality, as no consolidated official range is available — on the entire capital gain since the real acquisition. The reverse remains true: occasionally taking a leveraged position doesn’t make anyone a speculator. If you operate for a prop firm, the question arises differently again: your remuneration isn’t generally a disposal gain, and classification as professional income becomes more likely.

As for margin-call liquidation, nothing in the law exempts the forced sale: it remains a disposal for consideration, taxable at 10% or at 33%. It’s the most frequent exit for a leveraged trader, and it deserves to be built into your risk management as much as into your tax plan.

The exchange rate is a hidden taxable event

Article 102, § 1^er is explicit: amounts denominated in foreign currency “are converted into euro at the exchange rate at the time of purchase and of realisation of the financial asset”. Each leg is converted at its own rate. A trade that’s perfectly flat in dollars can therefore create — or destroy — taxable base in euros purely through the movement of EUR/USD. Books kept in USDT: two conversions to document per transaction.

What the law does not say about perpetuals

The principle is settled, and the circular states it at point 88: derivative products are always contracted for consideration, and the transfer of cash or other assets resulting from the settlement of the derivative is a taxable disposal for consideration. The calculation, however, is not — the law works on “price received minus acquisition value”, a formula that doesn’t carry over to a contract with no acquisition of an underlying asset. As of 3 September 2026, no published text settles:

• Is it the realised PnL position by position, or is each partial close a separate disposal?
• Can gains and losses be netted within a single derivatives account before declaring a balance?
• How should funding fees, paid or received, be treated: a component of the result, costs, or separate movable income?
• Is a perpetual contract concluded on an offshore platform a financial instrument or a crypto-asset? The rate is the same, but the classification governs Belgian withholding and, potentially, the stock exchange transaction tax.
• Pledging crypto-assets as collateral to borrow isn’t listed among the transactions treated as a disposal, which argues against a taxable event; but no circular confirms it. Two indications point the same way: Article 413/1, § 6 does distinguish between disposal and “the agreement creating a security interest” as two separate events; and the explanatory memorandum specifies, regarding that same article, that “pledges that don’t involve a transfer of ownership of the assets given as security but merely make that transfer possible” don’t end the deferral, as long as the transfer hasn’t taken place.

It’s the biggest gap in the scheme for a trader, and we won’t plug it with an invented answer. For significant amounts, a ruling from the Advance Ruling Service is the only safe route.

Transaction by transaction

Transaction	Taxable?	Regime and point to watch
Purchase, or transfer between your own wallets	No	No disposal. But keep proof of the price and the date: without it, the zero-cost fiction applies.
Sale for euros, or payment for goods or a service	Yes	10% after the allowance, or 33% if reclassified.
Crypto-to-crypto or stablecoin swap	Yes	The text covers the price received “in cash, in securities or in any other form”.
Futures, options, swaps, CFDs	Yes	Same category and same rate as spot; cross-offsetting of losses.
Offshore perpetual contracts	Yes in principle	The calculation method isn’t settled by any text.
Pledging as collateral for a loan	Probably not, not settled	Not listed among deemed disposals. The liquidation of the collateral, however, is one.
Hack, stolen keys, rug pull, dead token	No deduction	No disposal, no capital loss.
Mining	Yes, on an unestablished basis	Professional income most often, deductible expenses — but no published text says so.
Staking, lending, yield farming	Yes, on an unestablished basis	Dominant reading: movable (investment) income. No text or circular enshrines it.
NFTs	It depends	10% only if it can be used for payment or investment purposes.
Gift or inheritance	Not as capital gains	Regional duties. The beneficiary takes over your acquisition value.
Leaving Belgium	Yes	Deemed disposal of the whole portfolio: see below.
Mere holding	No	No wealth tax, but reporting obligations.

The swap is trap number one

It reverses a reflex picked up elsewhere. Article 102, § 1^er, subparagraph 1^er covers “the price or value received, in cash, in securities or in any other form, as remuneration for the financial assets disposed of”, and the explanatory memorandum confirms that any conversion into another crypto-asset or into fiat currency is a disposal for consideration.

A hundred swaps in the year is a hundred taxable events, without a single euro landing in your account. And the squeeze is real: the capital gain taxed at the time of the swap can’t be recovered if the new token collapses the following year, since losses aren’t carried forward. France offers exactly the opposite — a tax deferral on exchanges with no balancing payment — but it taxes at 31.4% from the first euro of gain, with no allowance. Neither system is “better”: they penalise different trading styles.

A worked example, from start to finish

Marie is a Belgian resident, an employee, and manages her portfolio herself without structural leverage. She holds 2 BTC bought for €18,000 in total in 2020, and ETH acquired in 2023. On 31 December 2025, her statement shows €140,000 for her bitcoins and €22,000 for her ether.

2026 transaction	Price received	Acquisition value used	Result
Sale of 1 BTC in March	€85,000	€70,000 (half of the value on 31/12/2025)	+€15,000
Swap of all her ETH for SOL in June	€30,000	€22,000 (value on 31/12/2025)	+€8,000
Perpetuals closed at a loss in November	—	—	−€9,000
Balance of category c)	—	—	+€14,000
Annual allowance	—	—	−€10,000
Taxable base, then tax at 10%	—	—	€4,000 → €400

Three things to note. The ETH→SOL swap is taxable even though Marie didn’t receive a single euro. Her loss on perpetuals offsets her spot gains because they’re in the same category. And without the snapshot, her BTC sold at €85,000 would have been taxed on €76,000 instead of €15,000.

The same scenario, shifted by a few weeks. If Marie had closed her perpetuals in January 2027 instead of November 2026, her 2026 base would be €23,000, i.e. €13,000 after the allowance, and her tax €1,300. Her €9,000 of losses wouldn’t be carried forward: they’d only be worth something against 2027 gains. The timing of closing a losing position has never mattered as much as it does in Belgium.

Two clarifications on this allowance. It is per individual: a couple in which each partner holds their own assets gets it twice. And it isn’t €15,000 in 2026: the top-up mechanism carries forward the unused portion of the allowance from one tax period to the next, at a maximum of €1,000 per year and €15,000 in total — but there is no prior period under this regime, and the explanatory memorandum confirms it with a worked example that caps the 2026 exemption at €10,000 and the 2027 one at €11,000. Note finally where this €10,000 comes from, because the nuance matters when you put figures on a decision. Nowhere does the adopted text say “10,000 euros”: Article 96/2, paragraph 1^er, 2° sets only a non-indexed base amount of €4,855, and 3° a supplement of €480. Those are the base amounts: it’s the indexation of Article 178 of the CIR 92 that takes them, for assessment year 2027, to €10,000 and €1,000 — figures the explanatory memorandum states as such about ten times, expressly describing them as the “indexed amount for assessment year 2027”. Beware in passing of sources quoting €5,940: that was the base amount in the bill tabled in December 2025, calculated on an indexation coefficient that was still an estimate, and it has changed.

What isn’t deductible, and why

Article 102, § 5, subparagraph 2 defines the capital loss as the negative difference between the price received as remuneration for the financial assets disposed of and an acquisition value demonstrated by all means of proof under ordinary law, oath excepted. No disposal, no capital loss: stolen keys, hacking, a rug pull, the bankruptcy of a platform and a token that has become worthless but was never sold therefore don’t exist for tax purposes. The nuance that changes everything: a token that has fallen to almost nothing but actually disposed of amounts to a disposal, hence a capital loss that can be offset against your gains for the year. One more reason to know how to spot fake tokens and DeFi scams before you get involved.

Another deduction many people hope for that doesn’t exist: your costs. Article 102 is silent, but the explanatory memorandum is not — it states that the capital gain “is a net income” and that “no cost incurred for the acquisition or sale transactions of that asset is taken into account in this calculation”, with the stock exchange transaction tax and a company auditor’s fees cited as having no impact. Platform commissions, spread, withdrawal fees: nothing reduces the 10% base. The 33% regime, by contrast, accepts costs (Article 97, § 1^er) — one of the few things it gives in exchange for what it takes. Network fees and the slippage on an on-chain swap fall outside the letter of that commentary, and no text expressly covers them.

Staking, lending and DeFi: a rate, but no legal classification

Here we have to be frank about how solid the sources are. You’ll read everywhere that the rewards from staking, lending interest and yield farming returns are movable income taxed at 30%. The rate does exist: it’s that of the ordinary withholding tax on movable income. The classification, however, is enshrined in no published text: the words “staking”, “mining” and “DeFi” don’t appear once in the explanatory memorandum — we searched for them one by one, in a document that does nonetheless expressly deal with NFTs, conversion and airdrops — and no circular covers DeFi. The 30% is a prudent working hypothesis, not a firm parameter.

A safeguard exists against double taxation: Article 96/2, paragraph 1^er, 6° exempts from the 10% tax the income of category c) “provided that it is taxable as movable or professional income”. On the other hand, nothing says which acquisition value to use for the reward token received, or how to treat the subsequent capital gain on it.

Airdrops, on the other hand, are settled — and on the right side. As the law recognises an acquisition value only for what has been acquired “for consideration”, many conclude that a token received free is worth zero and that an airdrop resold for €50,000 generates €50,000 of taxable base. The explanatory memorandum says exactly the opposite: “when the taxpayer acquires crypto-assets through an airdrop […], the acquisition value of the crypto-assets acquired refers to the value of the assets concerned at the moment they are granted to the taxpayer”. It isn’t the law, it’s part of the preparatory works — but it’s a position set down in black and white, and it changes everything: only the rise after receipt is taxed. Note the date of the allocation and the price on that day: that figure, and that figure alone, protects you.

Finally, beware of a side effect: using lending with leverage is an indicator of speculation liable to tip your whole portfolio into the 33% regime.

NFTs: leaving the 10% scope can cost more

The restriction is in the law, not in a circular. Article 92, § 1^er, c) defines crypto-assets as any digital representation of a value or right that can be transferred and stored electronically, “including non-fungible tokens that can be used for payment or investment purposes”.

Many people conclude that a purely artistic NFT would be exempt. That’s a costly misreading: the explanatory memorandum specifies that speculation on unique, non-fungible tokens outside this definition — digital works of art and collectibles included — still falls under Article 90, paragraph 1^er, 1°, and so under 33% plus surcharges, if it doesn’t amount to a professional activity. Leaving the 10% scope drops you into a heavier regime, not into an exemption. If you’ve touched Ordinals or NFT collections, this is the first point to check.

At the other end of the spectrum, the parliamentary records specify that the definition of financial assets also covers ETFs and ETNs, and that security tokens fall outside the MiCA regulation but remain within the tax scope as financial instruments.

Leaving Belgium, or moving there

This is the aspect the guides forget, and it’s a costly one. Article 92, § 2 treats as a disposal for consideration the transfer of the domicile or of the seat of wealth outside Belgium: moving triggers a deemed disposal of your whole portfolio, taxed on its value at the time of the move.

A payment deferral exists (Article 413/1, § 6), granted automatically for a move to the European Union, the EEA or a State bound by an agreement on the exchange of information and mutual assistance in tax recovery; elsewhere — the United Arab Emirates, for example — only on request and against sufficient security. It isn’t an unconditional gift: it ceases if the assets are disposed of for consideration or if they’re the subject of a “security agreement in rem relating to financial instruments”, and keeping it requires an annual certificate. Read the end of that wording closely: it’s a defined notion, that of Article 2, § 1^er, 12° of the CIR 92 stemming from the law of 15 December 2004 on financial collateral, and it covers financial instruments — not, literally, the crypto-assets of letter c). Second nuance, useful to anyone who borrows against their portfolio: the explanatory memorandum reserves this effect for pledges that carry a transfer of ownership, and not those that merely make it possible in case of default. The payment obligation lapses on returning to Belgium within 24 months, or after 24 months spent abroad.

The symmetry works in your favour here: anyone who moves their residence to Belgium benefits from a step-up. Article 102, § 3 deems the acquisition value equal to the value of the asset on the first day of liability to personal income tax — so you aren’t taxed on the gain accumulated before your arrival. A detail that costs newcomers and leavers alike dearly, and which comes not from a circular but from the law: it extends the mechanism of Article 129/1 of the CIR 92 to the exemption of capital gains on financial assets; that article limits, pro rata to the number of months of the tax period, the tax benefits of anyone who isn’t liable to personal income tax for a full calendar year. Arriving in September therefore doesn’t mean a €10,000 allowance — and the circular, as reported, specifies that any calendar month whose fifteenth day falls within the period counts as a full month.

Your reporting obligations

The golden rule fits in one article, and you have to read its mechanism backwards to understand it. Article 313, paragraph 1^er of the CIR 92 exempts taxpayers from declaring income on which a withholding tax on movable income has actually been withheld; the law adds a 7° that carves out from that exemption capital gains realised on the financial assets of letters c) and d) of Article 92, § 1^er — exactly crypto-assets, funds and investment gold, the two letters that escape withholding. Translation: your crypto capital gains must always appear in your return. The fact that no withholding was applied doesn’t make declaring optional — quite the opposite.

We won’t publish any return box codes: those found online contradict one another, none could be officially confirmed, and even where the 10% tax will go on the return is unknown — the return template for assessment year 2027 will only be published in spring 2027, as will the filing deadlines. The sections of the return are identifiable: miscellaneous income for the 33%, income from capital and movable property for any income received without withholding, profits or gains for professional activity.

Foreign accounts: two steps, not just one

This is the most common oversight. Mentioning your foreign account in the return isn’t enough: you must also report it separately to the Central Contact Point kept by the National Bank of Belgium. That report is made once, at the latest when the return is filed.

Which accounts? Those opened with a provider comparable to a foreign banking, currency-exchange, credit or savings institution. That a custodial exchange platform is treated as one is the prudent reading, and it’s the one we advise you to follow — but let’s be frank: we found no text expressly placing a crypto-asset account within the scope of the Central Contact Point, and its formal inclusion, mentioned in the preparatory works, has no scope or timetable that we could verify. A non-custodial wallet where you alone hold your keys, a MetaMask or a Ledger, on the other hand, isn’t an account.

What it costs not to declare

An administrative fine of €50 to €1,250 per offence (Article 445, § 1^er of the CIR 92), which can be combined with a tax increase of 10 to 200% of the additional tax due (Article 444), raised to the highest rates in case of fraudulent intent — and criminal proceedings in case of serious tax fraud.

The investigation periods of Article 354 are worth knowing, and this is where you should beware of what lingers online. Many articles still describe the framework from the law of 20 November 2022, with six years for so-called semi-complex returns and ten years for complex ones. These two periods no longer exist: the law of 18 December 2025 abolished them, with retroactive effect to assessment year 2023. Three remain.

Period	Case covered
Three years	Return filed on time, found incomplete or inaccurate.
Four years	No return or late filing, and so-called complex returns.
Seven years	Fraud, subject to prior notification of the indications of fraud (Article 333, paragraph 3).

Nor should you assume that a foreign crypto account automatically lengthens the period. The “complex” category covers specific reporting obligations — transfer pricing documentation, form 275 F, or, for personal income tax, disclosure of a foreign legal arrangement. Holding crypto-assets with a foreign provider isn’t one of them: the three-year period applies, four if you file late.

2026, the first year without anonymity

The European DAC 8 directive requires crypto-asset service providers to collect and transmit their users’ data. Collection covers transactions carried out since 1^st January 2026, and reporting takes place within nine months following the end of the calendar year: the European Commission places the first exchange between 1^st January and 30 September 2027.

Two deadlines are circulating, and they shouldn’t be confused. First, the platforms’ deadline: the Belgian transposition law was published in the Moniteur belge of 1^st April 2026 and entered into force on 11 April 2026 — dates we take from professional sources, as we haven’t read the Belgian text itself — and the first reporting period is calendar year 2026, to be transmitted to the SPF Finances (the federal finance ministry) during 2027. If you read elsewhere a Belgian deadline of 30 June 2027, ask to see the decree that sets it: we couldn’t identify it. Second, the tax administrations’ deadline, set by the directive: the exchange between States takes place by 30 September 2027 at the latest. The principle, though, is certain: 2026 is the first year the tax authorities will know about without having to ask you anything, and the “nobody will see anything” reasoning now has an expiry date.

Belgium compared with its neighbours

The rate alone tells you nothing. What really differentiates the regimes is what triggers the tax and what you can deduct: side by side, the five regimes of this series don’t reward the same behaviours.

Country	Rate on capital gains	The point that changes everything
Belgium	10% after a €10,000 allowance	Every swap is taxable, and no loss is carried forward.
France	31.4% from the first euro	But crypto-to-crypto exchanges benefit from a tax deferral.
Luxembourg	0% beyond six months of holding	Below that, progressive scale: duration is everything.
Switzerland	Private capital gains not taxable	But a cantonal and municipal wealth tax hits the mere holding of assets.
Canada	50% of the gain included in taxable income	Then federal and provincial scale: the cost depends on your other income.

Compared with Luxembourg, which exempts beyond six months of holding, Belgium taxes from the first day — but at 10% and after an allowance, whereas Luxembourg’s progressive scale applies within that period. Compared with Switzerland, which doesn’t tax private capital gains, Belgium is heavier on disposal — but it has no wealth tax: holding costs nothing there. The full table, with figures and sources side by side, is in our comparison of the five regimes.

What we won’t claim

As of 3 September 2026, no text we could read settles the following points, and we’d rather say so than fill the gaps: the method for calculating the capital gain on a perpetual contract, the treatment of funding fees and the classification of an offshore perpetual; the fate of network fees and the slippage of an on-chain swap, which the commentary on costs doesn’t expressly cover; the application of FIFO per account rather than globally; pledging as collateral for a loan; the classification of staking, lending and farming returns, and the acquisition value to use for a reward token already taxed at receipt; the codes and the filing deadlines of the return for assessment year 2027; the personal income tax scale and the self-employed social contributions for 2026; VAT on mining, NFTs and professional trading; the stock exchange transaction tax; regional gift duties on movable property; and the outcome of the pending appeals before the Constitutional Court.

Run the numbers with the simulator

The simulator applies the annual €10,000 allowance and then the 10% to your amounts. It shows the rule applied on each line, and stops at the cases that no text settles rather than inventing an amount. Everything is calculated in your browser: nothing is transmitted or stored.

Frequently asked questions

Are my crypto capital gains still exempt in Belgium?

No, not since 1^st January 2026. The law of 6 April 2026 taxes them at 10% after an annual allowance of €10,000 per individual, as long as you remain within the normal management of your private assets. Published on 21 April 2026, it takes effect on 1^st January 2026: first-quarter transactions are caught, even though the law didn’t yet exist.

Am I taxed on the whole rise since my purchase?

No, if you held the asset before 2026. The acquisition value used is that of 31 December 2025, so only the later capital gain is taxable. Beware: this snapshot is symmetrical and also applies to your capital losses, which are measured against that same value and not against your purchase price.

Is a crypto-to-crypto swap taxable?

Yes, and it’s trap number one. The text covers the price received “in cash, in securities or in any other form”, and the explanatory memorandum confirms that any conversion into another crypto-asset, stablecoin included, is a disposal for consideration. A hundred swaps in the year is a hundred taxable events, even if you never cashed out a single euro.

Are my gains on perpetuals treated like spot?

In principle, yes. Article 92, § 1^er, a) refers to the list of financial instruments of the law of 2 August 2002, whose letter i) covers financial contracts for differences with no condition on the underlying; and even if a crypto perpetual didn’t fall within it, it remains a crypto-asset under letter c). Same category as spot in both cases, same 10% rate. On the other hand, the method for calculating the result of a perpetual isn’t settled by any published text — for significant amounts, a ruling is essential.

Can I deduct my derivatives losses from my spot gains?

Yes, provided they’re realised in the same year. Article 102, § 5 provides for offsetting within the same category of financial assets, which covers spot, derivatives, shares, ETFs and bonds: a loss on perpetuals therefore also offsets an equity gain. But nothing is carried forward to the following year — a year of losses with no gains to offset is lost for tax purposes.

Does leverage automatically tip me into the 33% regime?

No. No leverage threshold and no number of trades automatically triggers reclassification: the assessment is global, based on a body of indicators, and it’s in principle for the tax authorities to establish that you’ve gone beyond normal management. Leverage is nonetheless a classic indicator, and the switch is costly: 33% plus municipal surcharges, with no allowance and no snapshot, and so on the capital gain since the real acquisition.

Did I have to notify an opt-out before 31 August 2026?

Not for crypto spot. Article 261, paragraph 1^er, 5° provides for withholding at source only for financial instruments and insurance contracts held with an intermediary established in Belgium. No withholding is legally due on crypto spot, even with a Belgian provider: the 31 August window concerned securities accounts, derivatives and insurance.

What happens if I leave Belgium?

Transferring your domicile out of Belgium is treated as a disposal for consideration of your whole portfolio, taxed on its value at the time of the move. A payment deferral exists — automatically for moves to the EU and the EEA, on request and against security elsewhere — but it ceases if you dispose of the assets or pledge them. Conversely, anyone who moves to Belgium benefits from a step-up and isn’t taxed on their earlier capital gain.

Disclaimer

This content is informational and up to date as of 3 September 2026. It isn’t personalised tax advice: we aren’t tax advisers, and everyone’s situation depends on their tax domicile, the nature of their transactions, the history of their portfolio and their Region of residence for anything relating to gift and inheritance duties. The cited texts may change, including as a result of an action before the Constitutional Court. Before any decision involving significant amounts, consult a tax adviser, a certified accountant or a tax lawyer, and consider an advance ruling from the Advance Ruling Service.