For five years, Paris positioned itself as Europe's leading cryptocurrency hub. President Emmanuel Macron's administration courted global exchanges, championed homegrown hardware wallet maker Ledger, and persuaded Circle to base its European stablecoin operations in the French capital ahead of the European Union's Markets in Crypto-Assets (MiCA) regulation. Now, within a fractured National Assembly, lawmakers have advanced legislation that would impose a 31.4% capital gains tax on crypto-to-stablecoin transactions.

A closer reading of the 2027 Finance Bill (Projet de loi de finances pour 2027) shows that French legislators are doing more than adjusting a tax bracket. Through three interlocking amendments, left-wing lawmakers are seeking to tax investors when they hedge against volatility, require them to disclose their private self-custody wallets, and bill them on paper profits if they move out of the country.

A One-Vote Margin for Amendment I-3898

The immediate flashpoint is Amendment I-3898, authored by left-wing deputy Nicolas Sansu. During a sparsely attended floor session on October 16, in which 477 of the Assembly's 577 deputies were absent, the measure passed by a single vote: 38 in favour, 37 against, and 25 abstentions. With the outcome decided by such a narrow margin, the proposal's fate now hinges on whether that arithmetic holds when the full chamber reconvenes for the budget vote on 17 November.

The 31.4% figure is not a newly created rate. It reflects France's existing flat tax (Prélèvement Forfaitaire Unique), which applies when retail investors cash out digital assets into fiat euros. Since 2019, Article 150 VH bis of the General Tax Code has granted tax deferral (sursis d'imposition) on crypto-to-crypto trades, allowing traders to rotate out of volatile tokens such as Bitcoin into stablecoins without owing tax until the funds reach a bank account.

Amendment I-3898 would revoke that deferral from 1 January 2027, converting a routine risk-management trade into an immediate taxable liquidation. During the same sitting, deputies voted 75 to 18 to reject a proposal that would have allowed retail investors to carry forward realised crypto losses for ten years. In practical terms, the state would collect 31.4% when gains are locked in during a bull run while offering no multi-year relief when a crash wipes out principal.

Compliant Tokens Taxed, Unregulated Ones Deferred

The drafting also creates an unusual regulatory dynamic. The text defines taxable stablecoins strictly as Electronic Money Tokens (EMTs) authorised under MiCA, which carry a direct contractual claim for redemption in fiat at par. That definition captures compliant tokens such as Circle's USDC and the euro-backed EURC — both from the issuer France had actively courted ahead of MiCA. By contrast, offshore issuer Tether (USDT) and decentralised protocol DAI do not hold MiCA EMT licences. Under a literal reading of the text, swapping Bitcoin into regulated EURC would trigger a 31.4% tax bill, while swapping into unregulated USDT would remain tax-deferred.

François Volpoët, CEO for France at blockchain analytics firm Chainalysis, warned that taxing regulated stablecoins directly undermines MiCA's objective of bringing traders onshore. Léa Mastrolillo, a tax partner at Paris law firm ORWL Avocats, added that the amendment would also scrap France's global portfolio valuation rule for these swaps, forcing taxpayers to calculate cost basis on a token-by-token basis.

Wallet Disclosure and an Exit Tax

If taxing stablecoin hedges pushes investors toward self-custody or foreign jurisdictions, two companion amendments waiting in the budget queue are designed to block both routes.

Amendment I-2701 would require French tax residents to declare the balances of all self-custodial wallets if their combined value exceeds €100,000 ($112,000) during the tax year. While such reporting would amount to standard tax enforcement in many countries, industry groups in France view a centralised government registry of high-value hardware wallets as a physical security risk, given the documented wave of violent home invasions and kidnappings targeting crypto holders over the past two years.

Amendment I-CF1822 proposes extending France's corporate-style “exit tax” to digital assets. Approved at the Finance Committee stage earlier in October — before the committee rejected the broader tax bill 31 to 3 and forced a floor reset — the measure targets anyone who has lived in France for six of the past ten years and holds more than €800,000 in crypto. Moving one's tax residence abroad would trigger capital tax on unrealised paper profits, even if not a single token has been sold.

Fiscal Pressures Meet a 24/7 Market

Why is Paris reaching so aggressively into citizens' digital wallets? The answer lies in France's fiscal arithmetic. According to official INSEE figures, French public debt has climbed past €3.64 trillion, or 119.8% of GDP, while the annual budget deficit stands at 5.4% of GDP. With street protests erupting across French cities over public spending cuts — resulting in more than 2,500 arrests, according to Reuters — the government is hunting for revenue wherever capital looks liquid.

That domestic tax hunt runs counter to the way global finance now operates. On October 20, the same day the National Assembly opened its floor vote on the budget's revenue section, a joint report from Coinbase and The Block Pro Research titled “The Always-On Dollar” found that global stablecoin transfer volume — flows in blockchain tokens designed to hold a steady value against fiat currencies such as the US dollar — reached $891 billion in the third quarter of 2026, moving $400 million every hour, with 73% of transactions settling outside standard banking hours. As corporations increasingly use stablecoins as 24/7 working capital, French lawmakers continue to treat them largely as speculative instruments.

An Uncertain Road to Law

Whether the three measures become law is far from settled. Even the French executive branch opposes Amendment I-3898: Public Accounts Minister David Amiel argued on the Assembly floor that the stablecoin tax is legally flawed and practically unenforceable. To take effect in January 2027, the amendments must survive the full National Assembly vote scheduled for November 17, pass the conservative-controlled Senate, and escape the government's likely use of Article 49.3 of the Constitution — a procedural mechanism that allows the Prime Minister to pass the budget without a parliamentary vote while stripping out hostile amendments.

Even if the executive purges the measures in November, the episode has already raised questions about Paris's standing as a crypto hub. Capital, and crypto in particular, tends to move to jurisdictions where it is welcomed and where the rules are predictable. By signalling that regulatory compliance could be a prelude to further taxation, France's parliament has handed its European rivals a competitive argument.