France Faces $9.4 Billion Crypto Tax Reporting Test as DAC8 Takes Effect

Chainalysis estimates that France saw roughly $9.4 billion in potentially taxable crypto activity during 2025, placing the country among the world’s 15 largest markets in the firm’s latest study. The figure combines on‑chain income, realized gains and crypto‑payment activity and arrives as France prepares for the first mandatory DAC8 reports.

Scope of the $9.4 Billion Estimate

The estimate breaks down into:

• $1.7 billion in crypto income (including mining, staking, lending and gambling proceeds)
• $2.5 billion in realized gains from centralized and decentralized exchanges
• $5.2 billion in crypto payments linked to merchant services and peer‑to‑peer transactions

Chainalysis stresses that these numbers represent “potentially taxable activity,” not unpaid taxes or actual revenue for the French Treasury.

Comparison with Declared Gains

For the 2024 tax year, about 24,000 French taxpayers reported €368 million in crypto capital gains. That declared amount covers a different year and a narrower category than the $9.4 billion estimate, making direct comparison inappropriate.

DAC8 and CARF Reporting Requirements

Effective 1 January 2026, the EU’s DAC8 directive obliges crypto‑asset service providers to collect detailed customer information and report aggregated transaction data for EU‑resident users. The first set of reports must be exchanged between tax authorities by 30 September 2027.

The OECD’s Crypto‑Asset Reporting Framework (CARF) adopts a similar exchange model beyond the EU, with the first cross‑jurisdictional exchanges expected in 2027. France has committed to this timetable.

Limitations of Reporting Coverage

Chainalysis estimates that only about 14 % of the identified potentially taxable on‑chain activity falls within the practical reach of DAC8/CARF reporting. The remaining 86 % involves decentralized exchanges, peer‑to‑peer transfers, on‑chain income and payments that are not directly captured by service‑provider reports.

Tax authorities can still use blockchain analysis, exchange records and audits to address this gap, but the reporting regime does not automatically identify every transaction or calculate cost bases.

What Lies Ahead for French Taxpayers

Crypto service providers must continue gathering customer and transaction data throughout 2026 and prepare the first annual reports for submission in 2027. French taxpayers remain responsible for maintaining records of purchases, disposals, income and transfers, as a DAC8 report alone does not determine tax liability.

Key FAQs

• Did Chainalysis say 90 % of French crypto taxes are unpaid? No. The 90 % figure refers to a Swedish study and was not applied to France.
• Is the $9.4 billion a tax bill? No. It is an estimate of potentially taxable activity, not a measure of unpaid tax.
• When will France receive the first DAC8 reports? Providers began collecting data on 1 January 2026; the first reports must be exchanged by 30 September 2027.
• Does DAC8 cover self‑custody wallets? DAC8 can capture transfers between reporting providers and external wallets, but it does not require continuous reporting for transactions that remain entirely within self‑custody.