Excellent accompagnement de Maître Uzan. Très professionnel, disponible et clair dans ses conseils, notamment pour ma première déclaration fiscale en France après de nombreuses années à l'étranger. Dossier parfaitement suivi. Je recommande vivement.
Cryptocurrency Taxation
How do I report and optimize the taxation of my cryptocurrencies in France? (form 2086, 31.4% flat tax, €305 threshold)
Tax lawyer in Paris – 20 years of expertise in digital assets and the taxation of crypto capital gains
Summary
- 31.4% flat tax on occasional crypto sales, where the total annual amount of sales exceeds €305 (French General Tax Code (CGI), art. 150 VH bis).
- Form 2086 mandatory: total portfolio acquisition price method, one line per taxable transaction.
- Reporting foreign accounts: every exchange established abroad must be declared using form 3916-3916-bis, failing which a penalty is incurred (€750).
- Tax lawyer: choice between the occasional or professional regime, secure calculation, defense in the event of an audit or requalification.
Which cryptocurrency transactions are taxable in France and at what rate in 2025?
- Sale for fiat currency = taxable: As soon as you exchange your crypto for euros, dollars or any other fiat currency, you carry out a taxable transaction. This also applies if you pay for goods or services in crypto.
- Crypto/crypto exchange = not taxable: As long as you remain within the world of cryptocurrencies (e.g. Bitcoin → Ethereum), no tax applies. Taxation is deferred until conversion into fiat.
- Flat rate = 31.4% flat tax: Gains are subject to 12.8% income tax + 18.6% social levies.
- Possible option for the progressive scale: By ticking box 3CN, you can be taxed according to your overall income, which is sometimes more advantageous for those with low income.
How do I calculate my crypto capital gain using the legal formula and complete form 2086?
- List all taxable sales: You must list sales for fiat currency or payments made in crypto. Note the date, amount, crypto used and consideration received.
- Apply the legal formula: the capital gain is equal to the sale price less the total acquisition price of the entire portfolio multiplied by the ratio between the sale price and the overall value of the portfolio at the time of the sale (CGI, art. 150 VH bis). The FIFO method does not apply.
- Exemption if sales do not exceed €305 per year: This threshold is assessed on the total amount of sales during the year, not on the gain.
- Complete and attach form 2086: Each line corresponds to a sale. This schedule is completed in the online return and feeds into box 3AN or 3BN depending on the net result.
What are the differences between an occasional investor and a professional crypto activity?
| Criterion | Occasional investor (CGI 150 VH bis) | Habitual activity, carried out as a professional (BNC) |
|---|---|---|
| Transaction volume | One-off or moderate | Daily / intensive trading |
| Objective pursued | Wealth management | Seeking regular profit |
| Tax regime | 31.4% flat tax (12.8% income tax + 18.6% social levies), or progressive scale by option | Non-commercial profits since 2023 (CGI art. 92, 1° bis): progressive scale + social security contributions |
| Return | 2086 + 2042 C | 2035 (controlled return) or micro-BNC on form 2042 C PRO |
| Reassessment risk | 10% to 40% (late filing / bad faith) | Up to 80% in case of fraud |
How can double taxation be avoided and how do I report my crypto accounts abroad?
- Mandatory reporting of every foreign account: You must declare any wallet held on a platform established abroad (Binance, Kraken, Kucoin…) using form 3916-3916-bis. The obligation exists even if there are no transactions.
- Penalty for omission: €750 per account: Failure to report may result in a penalty of €750 per account (€1,500 if the value of the account exceeds €50,000). The DGFIP uses data cross-checking to detect undeclared accounts.
- Tax credit if tax was paid abroad: If the exchange withholds tax at source (rare), you can credit it via box 8TK, up to the amount of the French tax.
- Keep your technical supporting documents: CSV histories, screenshots, residence certificates and proof of movements are necessary in the event of a tax audit.
Why use a tax lawyer specializing in cryptocurrencies?
- Securing the capital gain calculation and returns: A lawyer helps you consolidate your transactions from several exchanges, correct frequent errors in form 2086 and comply with the thresholds.
- Choosing the most advantageous tax regime: In the case of intensive activity, the lawyer can direct you towards a structure (SAS, holding company, non-trading company (société civile)) or towards BNC (non-commercial profits) status, depending on your wealth objectives.
- Prevention and defense in the event of an audit: The tax authorities can go back as far as 10 years if you have not reported your foreign accounts. A tax lawyer is essential to negotiate penalties or challenge a requalification.
- Overall optimization of crypto assets: Beyond the current year, the lawyer advises on gifts, transfers, future sales and even relocation to a crypto-friendly tax jurisdiction.
FAQ
Why do I have to declare a Binance account when my crypto is sitting there without being sold?
Even without any movement, every account on a foreign platform must be declared using form 3916-3916-bis. The obligation relates to holding the account, not to activity. This allows the tax authorities to monitor assets held abroad.
Failing to make this declaration exposes you to a penalty of €750 per account. Even if you have never converted your crypto into euros, holding an active account must be included in your annual return.
How do I correct my return if I forgot form 2086 last year?
You must send an amended return for the year concerned, this time attaching the completed form 2086. This can be done online or by paper mail marked "rectificative" (amended).
In the event of a persistent omission, the tax authorities may requalify your situation as "concealment". Late filing, if spontaneous, limits the risk of penalties to 10%. On the other hand, in the event of an audit, a surcharge of 40% or more may apply.
What should I do if the DGFIP reclassifies my crypto trading as a professional activity?
You have 30 days to respond to the proposed tax reassessment. It is crucial to examine the criteria used (volume, frequency, automation). If the tax authorities consider that you are acting as a professional, the tax regime changes (BNC, social security contributions).
A tax lawyer can challenge this reclassification by showing that you are managing private assets. If the activity is established, they can also assist you with an optimized regularization without heavy penalties.
5 reflexes before validating your crypto tax return
- Check whether the total of your sales for the year exceeds €305: if not, there is no tax.
- Use software compatible with form 2086.
- Declare each foreign account using form 3916-3916-bis.
- Consider the progressive scale option if your overall income is modest.
- Keep CSV files, supporting documents and transaction histories.
Further reading
- Article 150 VH bis of the CGI: tax regime for sales of digital assets (flat tax, €305 exemption threshold, option for the progressive scale).
- BOFiP BOI-RPPM-PVBMC-30: official administrative commentary.
- BNC regime / return 2035: accounting obligations in the event of professional requalification.
