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The short answer: a swap is not the same as a euro cash-out
French guidance for occasional private investors separates two events:
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- No-soulte digital-asset swap: exchanging one digital asset for another, without a balancing payment, is treated as an intermediary operation benefiting from tax deferral when the statutory conditions are met.
- Disposal for euros: selling a digital asset for euros, another legal-tender currency, goods or services is generally a taxable disposal.
The tax result therefore follows the consideration you receive, not the marketing name of the token. Converting a token into a stablecoin may fit the deferred-swap rule, but only if both sides are legally digital assets and no part of the transaction is a balancing payment. Converting the same token into euros is a cash disposal, even if you immediately leave the money on an exchange.
The rules below describe the private-wealth regime. Commercial activity, professional-like trading, mining and staking can fall under different categories and should not be assessed using the private-investor summary.
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How the two transaction types compare
| Question | No-soulte digital-asset swap | Cash-out to euros |
|---|---|---|
| What happens for tax purposes? | Generally an intermediary exchange with tax deferral when the legal conditions are satisfied. | Generally a taxable disposal for an occasional private investor. |
| Does it enter the €305 threshold? | No, when it is a qualifying tax-deferred exchange. | Yes. Its gross disposal price is included in the annual total. |
| What must be checked? | Both sides qualify as digital assets; there is no soulte; the transaction is not actually a sale for legal tender. | Disposal date, euro value, acquisition history, portfolio value, fees and taxpayer status. |
| Form 2086 | The deferred swap itself is not reported as a taxable disposal under this rule. | Use form 2086 to calculate and report taxable disposals, subject to the applicable threshold and status. |
| Foreign-account disclosure | A separate question. It depends on whether a qualifying account is held with an entity abroad. | The same separate account test applies; gain reporting does not replace account disclosure. |
A swap that includes euros or another balancing amount can lose the simple no-soulte treatment. If the facts are mixed, separate the components in your records and obtain advice before filing.
When a stablecoin swap can receive tax deferral
Both sides must be digital assets under the relevant rules
“Stablecoin” is a product description, not a guarantee of French tax status. Confirm that the token you receive and the token you give up fall within the legal definition of digital assets used by the applicable guidance. A token with features that place it in another legal category may require a different analysis.
There must be no soulte
A no-soulte exchange is one in which the consideration consists solely of the other digital asset or assets. If you receive euros in addition to the new token, or pay or receive another balancing amount, the transaction is no longer the straightforward deferred swap described by the private-investor rule. Keep the trade confirmation showing the assets exchanged and every cash adjustment.
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The rule postpones the tax event for a qualifying exchange; it does not turn the appreciation into permanently tax-free wealth. Preserve the acquisition history, dates and valuations through later transactions so that a future taxable disposal can be calculated correctly.
Examples
- Potentially deferred: exchanging digital asset A for digital asset B in one trade, with no euros paid or received, where both assets meet the legal definition.
- Needs a different analysis: exchanging asset A for asset B and receiving €50 in change.
- Taxable disposal category: converting asset A directly into euros, even if the euros are then used to buy another digital asset minutes later.
Why selling for euros is generally taxable
For a private investor, the French regime treats a disposal for legal tender as a realization event. The same category also covers disposals for goods or services and for another legal-tender currency. Thus, paying a merchant with digital assets can be relevant even when no euros pass through your bank account.
DGFiP’s current individual guidance states a 31.4% flat-tax (PFU) rate for this regime—12.8% income tax plus 18.6% social levies—and notes an option for the progressive income-tax scale. The page was modified in 2026. Check the rate and election available for the income year you are filing; a later finance law can change a rate or the mechanics of the option.
The rate applies to the taxable result, not to every euro moved between wallets. A qualifying deferred swap is outside the taxable-disposal calculation under the rule described above, while a euro sale enters it.
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The €305 threshold is based on gross disposal prices
DGFiP states that a private investor is exempt when the household’s total annual gross prices for taxable disposals do not exceed €305. The figure is the sale proceeds, not the profit. Tax-deferred exchanges are excluded from this threshold calculation.
« Vous êtes exonérés d’imposition lorsque la somme des prix de cession (montant annuel brut des cessions et non les plus-values), hors opération d’échange en sursis d’imposition, n’excède pas 305 € au cours de l’année d’imposition. »
Direction générale des Finances publiques, individual guidance modified in 2026
How to apply it
- List every disposal that is potentially taxable: euro sales, sales for another legal-tender currency, and disposals for goods or services.
- Remove qualifying no-soulte exchanges that benefit from tax deferral.
- Add the gross disposal prices, before considering whether each transaction produced a gain or loss.
- If the total is €305 or less, the private-investor exemption applies according to the guidance. If the total is above €305, the regime applies to all taxable disposals for the year, not just the amount above €305.
Because the threshold is measured on proceeds, a transaction with a small gain—or a loss—can still push the annual total above €305.
Form 2086 and the annual income-tax return
What form 2086 does
Form 2086 is the annex used to calculate the year’s digital-asset gains and losses. DGFiP directs individuals to attach it to the annual income-tax return and to carry the resulting net amount to the main return as instructed for that filing campaign.
Which vintage to choose
The official form page currently lists 2026, 2025 and 2024 vintages. Select the form corresponding to the income year being declared, not simply the calendar year in which you happen to complete the online return. Labels and return boxes can change, so follow the instructions displayed for that campaign.
Do you file it below €305?
DGFiP’s FAQ says form 2086 must still be filed even when annual taxable disposals are below the €305 threshold. The exemption affects the tax due; it does not remove the form requirement stated in that guidance.
What records support the calculation?
Retain exchange statements, wallet histories and bank records showing:
- the date and type of each disposal;
- the amount of each digital asset transferred and received;
- the euro value used for the transaction;
- the acquisition price and date for assets in the portfolio;
- the portfolio’s global value at the relevant disposal time;
- fees and other transaction data shown by the platform.
Records should reconcile across exchanges and self-custody wallets. A platform export that omits transfers between your own wallets is not, by itself, a complete history.
How the portfolio-based gain is calculated
DGFiP describes a portfolio-level formula rather than treating every sale as an isolated lot. In simplified form:
Gross gain = disposal price − [total acquisition price of the digital-asset portfolio × (disposal price ÷ portfolio’s global value)]
The “portfolio” is the value of your digital-asset holdings used by the calculation at the time of the disposal. The formula allocates a proportionate part of the portfolio’s total acquisition price to the assets sold.
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Assume, solely as an example, that the portfolio’s total acquisition price is €10,000, its global value at the disposal is €20,000, and €2,000 of assets are sold for euros. The allocated acquisition amount is €10,000 × (€2,000 ÷ €20,000) = €1,000. The gross gain for that disposal is therefore €2,000 − €1,000 = €1,000 before applying the relevant tax rules. This example is not a tax assessment; your actual values and transaction classification control.
Converting foreign-currency amounts
When a transaction is denominated in dollars or another currency, convert the amounts to euros using the exchange rate on each transaction date, as described in the applicable BOFiP calculation guidance. Keep the rate source and the timestamp or date used so the valuation can be reproduced.
Losses
Under the official FAQ, digital-asset capital losses are not freely deductible against unrelated capital gains and do not carry forward. A loss on one token therefore cannot automatically be used to reduce an unrelated investment gain in a later year.
Foreign-account reporting is separate from gain reporting
A taxable-disposal calculation and an overseas-account declaration answer different questions. DGFiP says that qualifying digital-asset accounts held with entities abroad must be disclosed on form 3916-3916 bis, filed with the income or results declaration.
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What the separation means
- You may have a reportable foreign account even when your year’s taxable gain is zero.
- You may owe tax on a euro disposal even if the account used for the sale is not subject to the foreign-account declaration.
- Submitting form 2086 does not substitute for form 3916-3916 bis when the account-disclosure conditions are met.
The account test is not automatically triggered by every wallet. A self-custody wallet that you control directly is not the same fact pattern as an account maintained by an overseas service provider. Review the provider’s location, contractual relationship and the form instructions for the relevant year.
Private investor or professional activity?
The 31.4% PFU summary is intended for the private-investor regime described by DGFiP. Do not apply it automatically when trading is carried out as a business or in conditions analogous to professional trading.
Commercial activity: BIC
DGFiP identifies commercial activity involving digital assets as potentially taxable under the category of industrial and commercial profits (BIC). The computation, records and return obligations differ from the private-disposal framework.
Professional-like trading: BNC
Activity conducted in conditions analogous to professional trading may fall under non-commercial profits (BNC). The frequency of operations alone is not a complete legal test; the overall circumstances and organization of the activity matter.
Mining and staking
The guidance also identifies mining and staking income as BNC. Income from those activities should be separated from private-investor disposals rather than folded into a form-2086 calculation without checking the applicable category.
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If your activity is organized, high-volume, financed, or carried out with professional tools and methods, obtain a classification review before using the private-investor forms.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical filing workflow
- Classify your status. Decide whether the year involved occasional private investing, commercial activity, professional-like trading, mining, staking or a combination.
- Classify each transaction. Mark no-soulte digital-asset swaps separately from sales for euros, other legal tender, goods or services. Flag any transaction containing a balancing payment.
- Build one chronological ledger. Reconcile exchange exports, wallet transfers, bank movements and on-chain records. Convert foreign-currency values to euros using the relevant transaction-date rate.
- Compute the annual threshold. Add gross prices for taxable disposals and exclude qualifying tax-deferred exchanges. Apply the €305 test to the annual total.
- Calculate gains and losses. Use the portfolio-based method and preserve the acquisition-price and portfolio-value evidence supporting each figure.
- Complete form 2086. Use the vintage for the income year, even if the annual total is below €305, following that campaign’s instructions.
- Transfer the result to the main return. Enter the net amount where the income-tax return directs you; do not invent a box from an older year.
- Check form 3916-3916 bis. Separately identify qualifying accounts held with entities abroad and disclose them with the income or results declaration.
- Archive the evidence. Keep confirmations, valuations, rates, fee records and account details long enough to answer a tax query about the filed year.
Common mistakes and how to correct them
“Every stablecoin swap is tax-free”
Incorrect. The deferred treatment requires a qualifying digital-asset exchange without a soulte. Verify the legal status of both tokens and the actual consideration.
Counting only profits toward €305
Incorrect. The threshold uses annual gross disposal prices. Recalculate using proceeds, excluding only qualifying deferred swaps.
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Ignoring small disposals
A €200 sale and a €150 sale already exceed €305 in aggregate, even if each gain is modest. Track every taxable disposal during the year.
Skipping form 2086 because tax is exempt
DGFiP’s FAQ still directs taxpayers to file form 2086 below the threshold. Follow that instruction for the relevant campaign.
Treating a foreign exchange account like a self-custody wallet
Account disclosure depends on the type of account and the foreign entity involved. Analyze that obligation separately from the gain calculation.
Using the private-investor PFU for a trading business
Commercial or professional-like activity can fall under BIC or BNC, and mining or staking income is identified as BNC. Reclassify the activity before filing rather than forcing it into the private-disposal regime.
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Using a prior-year form or rate
The 2086 page lists multiple vintages, and the current guidance was modified in 2026. Match the form, boxes and rate to the income year being declared.
What to verify before submitting
- The income year and corresponding form vintage.
- Whether each “stablecoin” is legally a digital asset for this purpose.
- Whether any trade included a euro payment, receipt or other soulte.
- The annual gross proceeds total, with deferred swaps removed.
- The portfolio acquisition price and global value used in each calculation.
- Euro conversion rates for foreign-currency transactions.
- Your status as a private investor, commercial operator or professional-like trader.
- Whether an account with an overseas entity requires form 3916-3916 bis.
- The current PFU rate or progressive-scale option for the relevant income year.
Bottom line
For French private investors, a no-soulte exchange between qualifying digital assets can defer tax, while selling for euros is generally a taxable disposal. The €305 test measures annual gross disposal proceeds, not gains, and qualifying deferred swaps are excluded. Use form 2086 for the disposal calculation, make any required 3916-3916 bis account disclosure separately, and do not use the private-investor rules without checking your status and the token’s legal classification.
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