France Stablecoin Tax: Why Crypto Swaps Could Get Taxed

In France right now, swapping a coin for a stablecoin usually isn't a taxable event. You only owe tax when you cash out to euros. A budget amendment the National Assembly passed on October 16 would end that for one big group of stablecoins starting January 1, 2027, so moving profits into a "safe" coin could itself trigger the 31.4% default rate on capital gains. It's not law yet, and it only covers French taxpayers, but it's the clearest example I've seen of a government going after the exact move most of us make when we take profit. Here's my plain-words read, with the sources so you can check me.

What did French lawmakers actually vote on?

The proposal is amendment I-3898 to France's 2027 budget bill. According to the vote record, it passed on October 16 at first reading, with 38 votes for, 37 against and 25 abstentions, out of 100 deputies who took part. That's one vote. CoinDesk reports the finance committee had already approved it before the floor vote.

Two things change in the text. First, it removes the tax deferral (the "pay later" treatment) for swaps where you receive an e-money token as defined by MiCA, the EU's Markets in Crypto-Assets rules. Under MiCA, an e-money token is a stablecoin that tracks a single official currency, like the euro or the dollar, issued by an authorized firm. Second, it rewrites how gains get calculated, which I'll get to below.

Why would swapping into a stablecoin count as cashing out?

The lawmakers who wrote it explain their reasoning in the amendment's statement of purpose. Their argument: converting crypto into euros already triggers the flat tax, and stablecoins backed by regular currencies can work just like money, since you can pay with them or buy other crypto on exchanges. So they call the current gap a hole in the law, not a deliberate choice. They also say the UK and Italy have already moved in this direction. That's their claim, and I haven't checked those countries' rules myself.

Honestly, I get the logic. If you sell a coin into a euro stablecoin, you've locked in your gain about as well as if you'd sold to euros, and the stablecoin can be spent. From a tax office's point of view, it's hard to argue that's different from taking profit.

What would this look like for a French trader?

Here's a hypothetical, not a real case or tax advice. Say a French holder bought a coin a while ago and it's gone up a lot. They swap it into a euro e-money token to protect the gain, and they never touch a bank account.

• Under today's rules: that swap is generally deferred. The tax question comes later, when they actually cash out to euros or spend it.
• Under the amendment, from 2027: the swap itself becomes the moment the gain is counted. CoinDesk notes the default rate on private investment gains is 31.4%, though people can choose the progressive income-tax scale instead.

The tricky part is cash flow. They'd owe tax on a gain that's sitting in a stablecoin, not in their bank account. And if they later swap back into something volatile and it drops, the tax already counted on the earlier swap doesn't shrink with it.

The cost-basis change matters too

This part got less attention. Right now, France works out crypto gains with a formula based on your whole portfolio. The amendment would switch to the cost of the actual coins you sold, and when you bought the same coin at different prices, you'd use a weighted average (your total cost for that coin divided by how many units you hold, roughly speaking).

For coins bought before 2027, the text gives two options: prove what you actually paid for each asset, or split your total portfolio cost as of December 31, 2026 across your holdings based on their value that day. The second choice is irrevocable once you use it in your first tax return with a taxable sale after January 1, 2027. If you trade a lot, this is the part where good records stop being optional.

Who's pushing back, and why?

Not everyone in the room was on board. CoinDesk reports that Public Accounts Minister David Amiel asked for the amendment to be withdrawn and opposed it otherwise. His point was practical: "We first need to define stablecoins, then ensure our ability to monitor and trace reallocations within a portfolio of assets." The finance committee's rapporteur general, Philippe Juvin, said he preferred to keep the deferral because of how volatile crypto is.

There's also a behavior question. Francois Volpoet, Chainalysis' regional sales director for France, told CoinDesk the change could push people toward DeFi platforms, peer-to-peer trades and offshore exchanges that sit outside international tax-reporting systems. That's a warning, not a measured outcome, but it's a fair one. Tax rules that are easy to sidestep tend to move activity rather than collect money.

One more thing I noticed reading the actual text: it specifically names MiCA e-money tokens. My reading is that a swap into a stablecoin that isn't a MiCA e-money token wouldn't be caught by this particular line. That's my interpretation, not a lawyer's, and it's exactly the kind of gap the minister was talking about when he said stablecoins need defining first.

What this doesn't settle yet

To be fair, this is early. CoinDesk notes the changes still have to get through the rest of the budget process and could be amended or dropped before becoming law. A one-vote margin with a quarter of the room abstaining isn't exactly a mandate. It also only covers people who pay tax in France. If you're somewhere else, your country's rules apply, and they vary a lot.

What it means for the trenches

Even if you're not French, I'd treat this as a signal. Stablecoins are being pulled into the regular money system, and tax offices are noticing. I saw the same direction from a different angle in my read on Mastercard's stablecoin risk scores. Here's what I'd take from it:

• Know your local rule on swaps. Whether a coin-to-stablecoin swap is taxable depends on where you live. Find out before you take profit, not after.
• Keep records from day one. Date, amount, price, fees, for every buy and swap. A cost-basis change like this one rewards people who can prove what they paid.
• Don't let tax dodging drive your wallet choices. Moving to sketchy offshore platforms to avoid a tax bill swaps one risk for a bigger one. A stuck exchange costs more than a tax bill ever will.
• Set some aside when you take profit. If a swap might be taxable where you live, keep part of it untouched for the bill.

What I'm watching next

Whether amendment I-3898 survives the rest of France's budget process, and whether the government comes back with its own definition of stablecoins like the minister asked for. Big policy headlines land on the live crypto news page, and the Legion roadmap shows what I'm building here. New around here? Start with why I built this home base.

The takeaway: the line between "still in crypto" and "cashed out" is getting redrawn, and stablecoins are where it's happening first. Learn your own country's rule on swaps and keep clean records now, so a law change like this one is a paperwork job and not a surprise. If you're in Europe, does your country already tax coin-to-stablecoin swaps?

Still building. Still here. 🫡