France Votes to Tax Crypto-to-Stablecoin Swaps at 31.4%: How Would AI Calculate It?
2026-10-21
On October 16, 2026, France's National Assembly voted 38 to 37 to adopt amendment I-3898, which would tax gains when you swap crypto for a MiCA-regulated stablecoin, at the 31.4% flat rate, from January 1, 2027. It is not law yet.
The math is simple arithmetic, which is exactly where AI tools can help and mislead. This guide explains the rule, works through an example, and shows how to use AI to calculate the tax safely.
Key Takeaways
The National Assembly adopted I-3898 on October 16 by 38 votes to 37, with 25 abstentions, as part of the 2027 budget's first reading. It still faces further votes, the Senate, and publication, and could be changed or removed.
If kept, from January 1, 2027 swapping crypto for MiCA e-money tokens would no longer be tax-deferred. The gain would be taxed at 31.4% (or the progressive scale if you opt for it), calculated on the weighted-average acquisition cost of the assets sold.
AI can speed up cost-basis and gain calculations, but it is not a tax authority. Check its output against a spreadsheet and a French tax adviser, since lot-tracking and qualification errors are the main risk.
What Did France's National Assembly Actually Vote On?
The Assembly adopted amendment I-3898 to the 2027 finance bill on a floor vote, not a final law. According to Stablecoin Insider, left-wing deputy Nicolas Sansu filed it on October 10 with sixteen co-signers, and the official tally (scrutin n°8836) was 38 for, 37 against, and 25 abstentions among 100 voters.
The finance committee had already backed a paired text. CoinDesk reports the changes would apply to transactions from January 1, 2027, but remain subject to the budget's remaining parliamentary stages.
It wasn't unopposed. Public Accounts Minister David Amiel asked for the amendment to be withdrawn, saying stablecoins must first be defined and the state must be able to trace reallocations inside a portfolio. The finance committee's rapporteur, Philippe Juvin, said he favored keeping the deferral given crypto's volatility. Critics, including a Chainalysis executive, warn it could push traders toward DeFi, peer-to-peer deals, and offshore exchanges.
How Is Crypto Taxed in France Today, and What Would Change?
Today, swapping one crypto for another without receiving cash generally benefits from tax deferral, and gains become taxable on a cash-out. Taxable gains for private investors face a default 31.4% flat rate, though they can opt for the progressive income-tax scale. Amendment I-3898 would remove the deferral when you receive e-money tokens as defined by the EU's MiCA regulation.
Which Stablecoins Would Be Affected?
Only MiCA "e-money tokens" would trigger it, not every token called a stablecoin. The amendment points to the definition in article 3(1)(7) of Regulation (EU) 2023/1114: a crypto-asset that aims to hold a stable value by referencing one official currency. Stablecoin Insider cites authorized tokens such as USDC and EURC as commonly discussed examples.
Tokens that don't meet that definition sit outside the carve-out as written, and French outlets have flagged that this could shift volumes toward non-qualifying tokens if the text survives. Whether a particular token qualifies is a legal question to confirm, not something to assume from its ticker. For background on the regulation, see Bitrue's explainer on MiCA and how it works.
How Would AI Calculate the Tax?
AI doesn't set or change the rule. It would apply the same arithmetic you can do by hand, in five steps:
Check the trigger. The swap happens on or after January 1, 2027, you are a French tax resident, and you receive a qualifying e-money token.
Find the acquisition cost of what you sold. For units of the same crypto bought at different prices, use a weighted average, plus documented acquisition costs. For assets held before 2027, the amendment offers two options: keep documented historical cost per asset, or irrevocably allocate your December 31, 2026 portfolio cost across holdings by value on that date.
Find the sale price. Use the euro value of the stablecoin you received, minus documented disposal costs.
Subtract. Gain equals sale price minus acquisition cost.
Apply the rate. At the 31.4% flat rate, tax equals the gain times 0.314.
Worked example (illustrative only): you buy 1 ETH at €2,000 and 1 ETH at €3,000, so your weighted-average cost is €2,500 per ETH. After January 1, 2027 you swap 1 ETH worth €3,400 into USDC, with €10 of documented fees.
Published examples follow the same logic. Journal du Coin, as relayed by Stablecoin Insider, shows a €4,000 gain taxed at about €1,256, and a Blockchain Posts illustration of a 1 BTC gain of €70,000 produces about €21,980. Note the tax is due on the swap even though no euros reach your bank account.
Where AI helps: parsing exchange CSV exports, calculating weighted averages across many lots, flagging missing cost data, and testing scenarios such as when to realize a gain. Where it can fail: language models can slip on arithmetic, misread rules, or invent legal details, and the law isn't final. Feed it exact data, ask it to show every step, and verify with a spreadsheet. Avoid pasting wallet addresses or personal identifiers into general-purpose tools. For anything you will file, confirm with a licensed French tax adviser.
What Should Traders Watch Next?
Several things could change the picture before 2027:
Whether the carve-out stays in the text after the remaining Assembly votes.
What the Senate does with it, since it could restore the deferral, keep it, or widen it.
Whether the definition of qualifying tokens changes.
Related measures in the same budget debate, which reportedly include wallet-reporting thresholds from €100,000 and an exit-tax idea above €800,000.
Meanwhile, converting crypto to euros is already taxable. Bitrue's guide to turning USDC into cash covers that step, and its overview of the MiCA deadline and what it meant for EU users explains the regulatory backdrop.
Where Bitrue AI Fits: Think in After-Tax Terms
Bitrue AI is a trading strategy tool, not a tax calculator. It generates a strategy for a chosen risk tier, shows the reasoning behind it, and proposes take-profit, stop-loss, and drawdown settings that you review before starting. It does not compute taxes or give tax advice, and I found no Bitrue statement saying otherwise.
What the French proposal does highlight is that exits have a cost. If you are a French tax resident, a taxable swap can take up to 31.4% of a gain, so judge any strategy's historical win rate, return, and drawdown after fees, slippage, and your own tax situation.
Bitrue says those historical figures don't predict future results and that no AI tool guarantees profit. Keep exportable trade records, and ask your adviser how each type of exit is treated. You can explore Bitrue AI, compare setups on the Bitrue AI strategy page, or read the Bitrue AI overview.
If you want to follow these markets in one place, you can create a free Bitrue account or see Bitrue's trading campaign rewards page. Product and campaign availability varies by region, so check your eligibility first.
FAQ
Is France's 31.4% stablecoin tax law?
No. The National Assembly adopted amendment I-3898 on October 16, 2026 at first reading, 38 to 37. It still needs to clear the rest of the budget process, including the Senate, and could be changed or removed.
What tax rate would apply to crypto-to-stablecoin swaps?
The French flat rate of 31.4% on the gain, according to CoinDesk and Journal du Coin, though investors can opt for the progressive income-tax scale.
Which stablecoins would be taxed?
Only MiCA e-money tokens as defined in article 3(1)(7) of Regulation (EU) 2023/1114, such as authorized tokens like USDC and EURC. Other tokens fall outside as written.
Can AI calculate my French crypto tax?
AI can do the arithmetic and organize your transactions, but it can make errors and the law isn't final. Verify with a spreadsheet and a French tax adviser before you file anything.
Does converting crypto to euros already trigger tax in France?
Yes. Cashing out to euros is already a taxable event. The amendment would treat a swap into a MiCA e-money token like that cash-out from 2027.
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Disclaimer: The content of this article does not constitute financial or investment advice.
