France's Proposed Stablecoin Tax: What It Means for Your Crypto in 2027

French lawmakers are debating whether swapping cryptocurrency into an EU-regulated stablecoin should trigger a capital gains tax bill at the country's 31.4% flat rate. If the proposal becomes law, a routine move that traders currently make without any immediate tax consequence could become one of the most costly decisions in a French crypto portfolio. The vote on the revenue section of the 2027 budget is scheduled for 20 October, and the outcome is far from certain.

What the French National Assembly Is Actually Proposing

France already applies a 31.4% flat tax (the prélèvement forfaitaire unique, or PFU) to crypto gains when an investor cashes out to euros or makes a purchase with crypto. The key rule until now has been that swapping one crypto asset for another does not create a taxable event. You could move from Bitcoin to Ether, or from Ether into a stablecoin, without immediately owing anything to the tax authority.

The amendment under debate would change that for a specific category of stablecoins: electronic money tokens regulated under the EU's Markets in Crypto-Assets (MiCA) framework. If passed, exchanging any cryptocurrency for a MiCA-classified stablecoin would be treated as a disposal, crystallising any unrealised gain at the point of the swap.

Why MiCA-Regulated Stablecoins Are Being Singled Out

MiCA, which took full effect across the EU, created two formal categories for stablecoins: asset-referenced tokens and electronic money tokens (EMTs). EMTs are the ones pegged to a single fiat currency and issued by a licensed institution. Think of fully compliant euro- or dollar-pegged tokens issued by regulated issuers operating under an EU licence. These are precisely the instruments that regulators can monitor most easily, which is what makes the proposal's logic somewhat paradoxical: it targets the most transparent corner of the stablecoin market.

The Measures That Accompany the Stablecoin Amendment

The stablecoin swap tax isn't the only crypto-related measure in the 2027 budget debate. Lawmakers have also backed three additional proposals:

• Self-hosted wallet disclosure: French taxpayers would be required to declare any self-hosted crypto wallet holding at least €100,000 in assets (roughly $116,000 at current rates). Failure to comply would carry fines of up to approximately $11,600. For more on how this interacts with existing reporting obligations, see our earlier coverage of France's wallet disclosure rules for holdings above €100,000.
• Exit tax extension: France's exit tax, which currently applies to wealthy shareholders who relocate abroad, would be extended to crypto holdings worth roughly $900,000 or more. Unrealised gains on those holdings would fall within scope when the taxpayer moves their tax residence out of France.
• Loss carry-forward: In a taxpayer-friendly move, a separate amendment would allow crypto losses to be carried forward for up to 10 years, bringing the treatment of digital assets closer to the rules that already apply to listed securities.

You can find a fuller breakdown of the stablecoin swap and exit tax proposals in our dedicated piece on France's stablecoin swap and exit tax proposals explained.

The Offshore Risk: What Chainalysis Is Warning About

Francois Volpoet, the CEO of Chainalysis for France, put the concern plainly in a statement to CoinDesk. He asked whether France's goal is to have more taxpayers declare their assets, or to impose a higher rate on an ever-shrinking declared base. His argument is that applying the 31.4% CGT rate to swaps into MiCA-regulated stablecoins creates a direct incentive for traders to route activity through alternatives that sit outside MiCA's perimeter.

Regulated vs. Unregulated Stablecoins: The Compliance Gap

This is where the proposal's internal tension becomes clear. MiCA-regulated EMTs are issued by licensed entities, operate under AML and disclosure requirements, and generate transaction data that tax authorities can access through existing reporting channels. Stablecoins operating outside MiCA, or through decentralised finance protocols and self-hosted wallets, produce far less traceable data.

If swapping into a regulated stablecoin creates a tax event while swapping into an unregulated alternative does not, the incentive structure points traders toward opacity. Volpoet also raised a separate concern about the wallet disclosure requirement: the security risk of having large crypto balances on public record, given a documented rise in physical attacks targeting crypto holders in France. As of mid-year, France accounted for a substantial share of such incidents globally.

The Procedural Reality: This Is Not Yet Law

It's easy to read a headline and assume a proposal is settled. It isn't. France's finance committee rejected the revenue section of the government's 2027 budget by 31 votes to 3, which means all the crypto amendments, including the stablecoin swap tax, must be resubmitted and debated in the full National Assembly. Lawmakers have until 10 December to pass the budget. The 20 October vote on the revenue section is the next critical date to watch.

Until the full chamber votes and any measure passes into law, nothing changes. Crypto-to-crypto swaps (including those into stablecoins) remain non-taxable events under current French rules.

How Crypto Is Currently Taxed in France

For anyone trying to understand the baseline before any new rules apply, here's how crypto tax in France works right now.

The 31.4% Flat Rate and When It Applies

France taxes crypto gains at a flat 30% income tax component plus 17.2% social charges, but because the two are applied to the same gain, the combined effective rate rounds to 30% after the CSG deductibility, and the headline figure used in policy discussions is 31.4% (or sometimes cited as the full 47.2% for some taxpayers depending on the social charge base). The taxable event currently occurs when you convert crypto to fiat currency or spend crypto on goods and services. Swapping one crypto for another, including into stablecoins, does not currently trigger CGT.

What Changes Under the Proposal

Under the amendment being debated, the taxable moment would expand. A swap from Bitcoin, Ether, or any other crypto asset into a MiCA-classified EMT would be treated as a disposal. The gain (or loss) would be calculated as the difference between your cost basis in the crypto you're swapping away and the fair market value of the stablecoin you receive at the moment of the swap. That gain would then be subject to the 31.4% rate.

The practical consequence: if you bought 1 ETH at €1,500 and swapped it into a MiCA-regulated stablecoin when ETH was worth €3,000, you'd have a €1,500 gain subject to tax, even though you haven't converted to euros and haven't spent anything.

What This Means for You Right Now

The proposal is live but not law. That said, the direction of travel in French crypto tax policy is clearly toward broader scope and tighter reporting. Here's what to do before anything is finalised.

Track Your Cost Basis for Every Position

Whether or not the stablecoin swap tax passes, you need an accurate record of the cost basis for every crypto asset you hold. If MiCA-stablecoin swaps become taxable, the tax authority will want to know what you paid for the crypto you swapped out. If your records are incomplete, you may end up calculating gains on assumptions that are unfavourable to you, or you may simply be unable to file accurately.

Every exchange trade, DeFi interaction, and wallet transfer should be logged with the date, the assets involved, the amounts, and the market prices at the time. Tools that aggregate this data across wallets and exchanges make it far easier to produce a crypto tax report when filing season arrives.

Understand Which Stablecoins Might Be Affected

If the proposal passes in its current form, only MiCA-classified EMTs would create a taxable swap event. That means you'd need to know which stablecoins your exchange holds or offers under MiCA licences. Not every stablecoin available on European platforms is a MiCA EMT. Checking the regulatory status of the stablecoins you use is worth doing now, so there are no surprises if the law changes.

Factor the Exit Tax into Any Relocation Plans

If you're a French tax resident holding significant crypto and you've thought about relocating, the proposed exit tax extension is directly relevant. Holdings worth roughly $900,000 or more would fall within scope, with unrealised gains becoming taxable at the point of departure. This mirrors rules that already apply to shareholders with large listed-company stakes. Relocation planning for crypto-heavy individuals in France needs to account for this proposal, even at the draft stage.

The Broader EU Picture

France's proposed tightening sits within a wider divergence of approaches across Europe. At one end, Germany and Italy are moving toward or planning rates above 25% on crypto gains. At the other end, Greece published a draft bill last week proposing a 10% capital gains tax on crypto, placing it among the lowest-taxing EU jurisdictions for digital assets. That contrast is unlikely to be lost on traders weighing where to base their activity, and it's exactly the offshore migration risk that Chainalysis is flagging for France specifically.

MiCA was designed in part to create a consistent regulatory floor across the EU. A patchwork of very different tax rates, combined with rules that penalise the most compliant instruments, risks undercutting that consistency in practice.

Frequently Asked Questions

Is swapping crypto into USDT or USDC taxable in France today?

Under current French rules, swapping one crypto asset for another, including into stablecoins, is not a taxable event. The 31.4% capital gains rate only applies when you convert to fiat or spend crypto. The proposed amendment would change this for MiCA-regulated EMTs, but it has not yet passed into law.

What is a MiCA electronic money token?

Under the EU's MiCA regulation, an electronic money token is a stablecoin pegged to a single fiat currency and issued by a licensed institution. Only stablecoins that fall into this regulated category would be affected by the proposed French swap tax. Stablecoins operating outside MiCA, including many issued outside the EU, would not be covered by the amendment as currently drafted.

When do French lawmakers vote on this?

The revenue section of France's 2027 budget is scheduled for a full National Assembly vote on 20 October, with a final deadline of 10 December to pass the budget. The finance committee's rejection of the revenue section means the crypto amendments must be resubmitted to the full chamber before they can progress.

How do I calculate my crypto tax liability in France?

Your gain is calculated as the difference between the sale price (or fair market value at the point of disposal) and your average cost basis across all your crypto holdings. France uses a portfolio-level average cost basis rather than an asset-by-asset method. Maintaining a complete transaction history across every wallet and exchange you've used is essential for producing an accurate crypto tax report. A crypto tax calculator that supports the French calculation method can automate this process once your transaction data is imported.

What happens to the self-hosted wallet disclosure rule if the budget fails?

The wallet disclosure requirement, like all the crypto amendments, must pass the full National Assembly. If the budget or the specific amendment is rejected, the disclosure obligation does not take effect. However, France has signalled a clear policy direction toward greater transparency around self-hosted wallets, so this or a similar measure is likely to return in a future legislative session regardless of the outcome of the current vote.

Source: CoinDesk Policy