What is taxable, at what rate, how to calculate it, what to report; and where the real risks lie
In 2026, crypto taxation for private individuals remains based on a simple concept: you are taxed when you “exit ” from crypto, that is, when you convert it to euros (or more broadly to “traditional” currency) or when you pay for a good or service with crypto. The framework is familiar, but 2026 changes the equation: the flat tax rate increases and tax transparency accelerates at the European level.
1) When the tax actually becomes due: “exiting” the crypto ecosystem
For private individuals, the IRS takes a pragmatic approach: as long as you remain within the crypto ecosystem, the tax is “on hold.” It becomes due at the time of a taxable transfer , such as:
• selling crypto for euros (or another fiat currency);
• payment for goods or services in crypto (including via a crypto card): for tax purposes, this is as if you had sold part of your crypto to pay;
• certain transactions treated as sales depending on their structure.
What does not trigger immediate taxation
• crypto-to-crypto exchanges (BTC → ETH, ETH → stablecoin, etc.): no immediate taxation under the system for « individuals » (Article 150 VH bis of the General Tax Code)
• simple holding: an “unrealized” capital gain is not taxed as long as you do not sell.
Simple analogy: as long as you’re playing in the “crypto casino” without cashing out, the tax authorities will wait. As soon as you cash out (or pay), they count the token.
2) What’s changing in 2026: the flat tax rate rises to 31.4%
The 2026 increase is solely due to the rise in social security contributions (the CSG increased from 9.2% to 10.6% under the 2026 Social Security Financing Act), which raises the flat tax rate applied to capital gains.
The “standard” rate (Flat Tax) for individuals
31.4% in total:
• 12.8% income tax;
• 18.6% social security contributions (CSG 10.6% + CRDS 0.5% + solidarity levy 7.5%).
Practical note: For capital gains from crypto-assets sales (capital gains), the increase applies retroactively to sales made from January 1, 2025 and reported in 2026. For investment products, the increase applies to income received as from January 1, 2026.
Is it possible to not pay this Flat Tax?
There is an option for the progressive tax scale (box 2OP on income tax return 2042). This may be advantageous if you are in a low tax bracket, but it should be evaluated on a case-by-case basis, as social security contributions remain due (18.6% in 2026).
3) Calculating capital gains: the “portfolio” trap, not “line-by-line”
The most misunderstood point is the calculation. Many think in stock market terms (“I bought X, I sold X”). In crypto,for individuals, the tax calculation is often aggregate: it takes into account the total value of the portfolio at the time of sale, using a specific formula outlined in practical guides.
The formula (in plain language) boils down to this: We calculate the share of “acquisition cost” corresponding to what you are selling, proportional to the total value of your portfolio, and then subtract it from the sale price.
More specifically, the article 150 VH bis III of the CGI provides:
Capital gain = Sale price – [Total acquisition price × (Sale price / Total value of the portfolio at the time of sale)].
Illustrative example
You have invested a total of €1,600. Your portfolio is worth €3,000.You sell for €600. The taxable capital gain will not be“intuitive”: it is derived from the formula. A guide illustrates
this case with a capital gain result (e.g., €280 in the example).
Calculation: 600 – [1,600 × (600 / 3,000)] = 600 – 320 = €280 in taxable capital gain.
To remember: selling “a share” of your portfolio means,for tax purposes, selling a fraction of the whole.
4) The €305 threshold: Useful, but often misunderstood
The tax regime sets a well-known threshold: €305.
• When the annual total of taxable sales (crypto to fiat or crypto payments) remains below this threshold, the transaction is tax-exempt;
• In practice, this threshold is hard to handle because it requires understanding the concept of “sales” and how they are reported. If you are close to the threshold, document your transactions carefully.
Note: This threshold is not a tax deduction. If the total value of sales exceeds €305, the entire capital gain becomes taxable, not just the fraction exceeding €305. Filing a tax return remains mandatory even in cases of exemption.
5) 2026 Tax-return : What to do, in practice
A. Reporting Capital Gains
• Form 2086: details of sales and calculation;
• Fill in the main tax return (Form 2042-C, boxes 3AN for capital gains and 3BN for capital losses).
B. Declare the accounts on Foreign Platforms
• 3916-bis: to be completed for digital asset accounts held abroad, “one form per account”;
• Omission: the fine is €750 per undeclared account (€1,500 if the account’s value exceeds €50,000), €125 per omission or inaccuracy.
Practical note: a non-custodial wallet (such as MetaMask or Ledger) is not an “account” that must be declared under form 3916-bis, unlike an account on a centralized platform (Binance, Coinbase, Kraken, etc.).
6) 2026: Why is the risk of “not reporting” increasing significantly?
This isn’t about morality. It’s about probability.
European tax transparency is being ramped up: DAC 8 (transposed into French law by Article 54 of the 2025 Finance Act) requires crypto-asset service providers to report all transactions carried out by their clients to the tax authorities. Starting from 2027, crypto-asset service providers (PSCA) will be required to report transactions carried out in 2026: nature of the transactions, transaction value, and number of units exchanged.
At the same time, in the event of a tax audit:
• late payment interest (0.2% per month);
• surcharges ranging from 10% to 80% depending on circumstances (10% for failure to declare, 40% for deliberate failure, 80% for corrupt practices);
• and, depending on the situation, longer recovery periods when there are undeclared assets (3 years in principle, 6 years for undeclared foreign accounts, 10 years in cases of actual fraud).
7) Three practical cases I see all the time
Case #1 — “I didn’t sell anything, I just paid for something”
You pay for a plane ticket with a crypto card. For tax purposes, this counts as a sale: if your crypto has increased in value, you’ve just realized a taxable capital gain.
Case #2 — “I’m sticking with stablecoins, so I’m in the clear”
The crypto-to-stablecoin exchange is indeed not immediately taxable (crypto-to-crypto exchange), but the withdrawal in euros (or the expenditure) triggers the tax.
Case #3 — “I’m in DeFi, so I’m out of range”
The key issue remains the chargeable event and documentary consistency: as soon as there’s a conversion to fiat, a payment, or the use of an intermediary, your tax obligations quickly come into play. Income from staking, lending, or yield farming may also be classified as business income (BNC) if the activity is considered professional.
Overview
• 2026 Flat Tax rate: 31.4% (12.8% + 18.6%);
• Taxation applies primarily when: sale in euros / payment in crypto;
• No immediate tax on crypto-to-crypto transactions, including stablecoins, but be aware of conversions to euros or spending;
• Tax return: Form 2086 + report (boxes 3AN/3BN), and Form 3916-bis for foreign platforms (fine of €750 to €1,500 for failure to file);
• Risk in 2026: increased European reporting and transparency requirements (DAC 8).
Conclusion: In 2026, the right approach isn’t to “maximize”, but to “secure”
Crypto taxation for individuals is not just about a tax rate. It hinges on three common mistakes: misidentifying the taxable event, miscalculating, and misreporting. With a higher flat tax rate and increased transparency, 2026 is a year when discipline pays off: maintaining records, using tracking tools, and ensuring consistency in supporting documents and forms.
Disclaimer
This article is intended purely for informational and educational purposes. It does not constitute personalized legal advice and does not engage the liability of its author. As each taxpayer’s situation is unique, it is recommended that you consult a tax lawyer or a certified public accountant for any questions regarding your personal situation.
This article was written with the expertise of HASHTAG Avocats.
