The End of the "Grey Zone": The Impact of the DAC8 Directive on Crypto-Assets in Portugal
António Pratas Nunes | Lawyer
Against a backdrop of increasing international tax transparency, the DAC8 Directive marks a significant development for crypto-assets in Portugal.
Until recently, tax audits by the Portuguese Tax Authority (AT) relied largely on taxpayers' voluntary disclosure.
However, with the introduction of DAC8 has fundamentally changed this landscape by strengthening the automatic exchange of information on crypto-asset transactions across the European Union.
Approved by the European Council, the DAC8 Directive brings digital assets into line with the traditional financial sector.
In practice, crypto-asset service providers (including exchanges and custodial wallet providers) are no longer merely technological intermediaries; they now
act as reporting entities, automatically transmitting information about their users to the relevant tax authorities.
What is DAC8 and who is covered?
DAC8 is the eighth revision of the Directive on Administrative Cooperation (DAC). Its purpose is to enhance tax transparency in the crypto-asset market by requiring Reporting Crypto-Asset Service Providers (RCASPs) to collect and report detailed information on transactions carried out by EU tax residents.
The rules apply to major international platforms, such as
Binance, Kraken and Coinbase, as well as
custodial wallet providers. In certain circumstances, they may also apply to
decentralised finance (DeFi) arrangements where an identifiable controlling entity exists.
What information is reported to the Portuguese Tax Authority?
Under DAC8, the Portuguese Tax Authority (AT) receives standardised reports containing, among other information:
- Identification details: Name, address, country of tax residence and Tax Identification Number (NIF);
- Transaction history: Crypto-to-fiat conversions, crypto-to-crypto exchanges and transfers between wallets;
- Cash movements: Withdrawals to bank accounts and transactions involving debit cards linked to crypto-assets;
- Account balances: The value of crypto-assets held on reporting platforms at the end of each reporting period.
Greater Transparency and Data Cross-Checking
The new reporting framework enables the AT to perform automatic cross-checks between the information declared by taxpayers and the data received from crypto-asset service providers.
For example, where a taxpayer reports capital gains in Annex G or staking income in Annex B of the Portuguese tax return, the AT can compare those amounts with the information reported under DAC8.
Any inconsistencies or omissions may trigger tax divergence notices, requests for clarification or, where appropriate, penalties for non-compliance with Portuguese tax obligations.
Conclusion
At LVP Advogados, we observe that the classification of income derived from crypto-assets requires increasingly sophisticated legal and tax analysis.
This complexity is particularly relevant for individuals who have recently become tax residents in Portugal while maintaining investment structures abroad.
Tax compliance is no longer simply a best practice; it has become a fundamental component of effective wealth management. Maintaining accurate transaction records and properly documenting acquisition costs is essential to meeting reporting obligations and reducing the risk of future disputes with the tax authorities.
Given the increasing complexity of the regulatory framework, specialist legal and tax advice can play an important role in ensuring compliance and managing risk.
LVP Advogados
regularly advises individuals, investors and businesses on
crypto-asset taxation, regulatory compliance and cross-border tax matters in Portugal.
