Taxes 2026: The complete guide to declare your cryptocurrencies starting today

The French tax authorities have put away the velvet gloves. This year, crypto holders enter a much less tolerant tax campaign, as the administration sharpens its radars and broadens its field of vision. Between accounts to declare, taxable disposals, tax regimes and new obligations in preparation, the French investor must now walk the straight line. Because in 2026, misreporting your digital assets is no longer a mere slip-up: it can quickly become a heavy bill.

France tightens the noose on digital asset holders

The era when cryptocurrencies lived in a regulatory blind spot is coming to an end. Bercy wants to see clearer, further, more often. The tax administration already monitors accounts held on centralized exchanges (CEX), French and foreign. It may soon extend its gaze to self-hosted crypto wallets.

An amendment adopted by the National Assembly indeed provides to oblige taxpayers to declare their personal wallets when their value exceeds 5,000 euros. The text still has to pass the Senate stage, but the signal is clear: the patrimonial anonymity version blockchain is crumbling piece by piece.

This pressure increase is not isolated. In 2025, the French tax administration strengthened its controls and increased its recoveries by several hundred million euros thanks to improved surveillance tools. Digital assets now join this map.

The scene is set: crypto is no longer a grey area. It becomes a patrimonial line scrutinized like others.

Crypto: the 2026 tax guide to avoid missteps

Individual: which accounts must you declare?

Any French taxpayer owning an account on a crypto exchange must report it via form 3916-3916 bis. It does not matter if the platform is French, foreign, regulated or not. Even an account closed during the fiscal year must appear.

Each omission costs 750 euros per undeclared account. The tax authorities call this a fine. The taxpayer often calls it a very bad surprise.

Personal crypto wallet: should it be declared?

As of today, no. Self-hosted wallets such as Ledger or MetaMask are not yet subject to mandatory declaration. But this exception might soon disappear if the aforementioned bill comes into force.

Which operations are taxable?

Many investors mistake this point. A taxable disposal does not only correspond to a sale against euros.

Taxable are:

• the sale of cryptocurrencies against fiat currency;
• the purchase of goods or services with digital assets;
• a payment in stablecoins to settle a transaction.

On the other hand, exchanging a digital asset for another remains fiscally neutral. Converting bitcoin to ether is thus not taxable at this stage.

Crypto gains, professional status and traps many discover too late

How to calculate taxable capital gains?

France applies a global formula, much less intuitive than a simple purchase price versus sale price:

Sale price – [Total acquisition price × (Sale price / Total portfolio value before sale)]

In other words, the tax authorities don’t only look at the token sold. They watch the mechanism of the entire portfolio. That’s why so many investors make mistakes in their calculations.

Which form to declare your crypto gains?

Each taxable disposal must be detailed in form Cerfa 2086. Yes, even a capital loss must appear. The tax authorities want the full table, not just the glory days.

Flat tax or progressive scale?

Two options exist:

• PFU at 31.4%;
• Progressive income tax scale by option.

The right choice depends on your tax situation. Checking the wrong box can be costly.

When does one switch to professional status?

The tax authorities can reclassify an active investor as a professional if his activity resembles a habitual, organized, repeated and lucrative practice. In this case:

• the gains may fall under non-commercial profits (BNC);
• or even commercial profits (BIC) if the activity takes a structured commercial form.

Mining and staking already fall under BNC.

Figures to keep in mind before validating your declaration

• April 9, 2026: opening of the tax campaign on 2025 income;
• 750 euros: fine per undeclared account;
• 5,000 euros: threshold targeted for future crypto wallets to declare;
• 31.4%: current PFU rate on digital assets;
• 1 Cerfa 2086: mandatory for each taxable disposal.

The most insidious part of this matter is not the taxation itself. It is its complexity. Many investors still think a crypto portfolio is declared like a poorly maintained savings account. Grave mistake. Between specific calculations, distinct regimes and growing surveillance, amateurism becomes an expensive luxury.

And as if this were not enough, the crypto ecosystem sees other tensions arise. The latest episode: several bitcoin-specialized channels recently disappeared from YouTube, reigniting accusations of censorship against major platforms. Indeed, in the world of digital assets, calm remains a rumor.