Portugal’s commitment on 10 November 2023 was a promise to implement the Crypto-Asset Reporting Framework in time to begin automatic exchanges from 2027. It did not create a new crypto tax, and no CARF exchange began in 2023.
Archive note: this retrospective separates the commitment announced in 2023 from the European and Portuguese legislation adopted and implemented later.
What happened then
Portugal joined 47 other jurisdictions in a joint statement on the OECD’s Crypto-Asset Reporting Framework. The jurisdictions intended to implement CARF in time for exchanges to start by 2027, subject to domestic legislative procedures.
The statement was an important policy signal. Cryptoasset activity was moving towards the same international direction already familiar from financial-account reporting: standardised due diligence, identification of reportable users and periodic exchange between tax authorities.
But a joint statement is not the same as an operative domestic reporting return. In November 2023, legislation, technical rules, reporting periods and procedures still had to follow.
Facts: three legal layers must be kept apart
CARF is an OECD framework. DAC8 is the European Union’s amendment to the Directive on Administrative Cooperation extending automatic exchange to cryptoassets. Portuguese law then gives national effect to the relevant obligations and procedures.
These layers interact but are not interchangeable. The European Commission states that DAC8 applies from 1 January 2026, with reporting cryptoasset service providers collecting information on reportable transactions and the first reporting and exchanges taking place in 2027. Portugal’s Law 26/2026 implemented the European and international reporting architecture in domestic law.
Interpretation: transparency is not a charging provision
Reporting rules answer who must collect, verify, report and exchange information. Substantive tax rules answer whether an operation produces taxable income, which category applies, when it is recognised and which country may tax it.
The same transaction can therefore be reportable without producing tax, or taxable under domestic law even where a particular reporting rule does not apply. Treating the information framework as the tax itself obscures both questions.
Scenario: the platform record and the tax return
Assume a Portuguese-resident user sells cryptoassets through a reporting platform. The platform may collect residence and identity data and report transaction information under the applicable regime. The user must separately determine the Portuguese tax character of each transaction and whether acquisition cost, holding period or other evidence changes the result.
If the platform’s data shows gross disposals while the tax return shows a net taxable amount, that difference is not automatically an error. It is a reconciliation that should be supported. If names, tax-identification numbers, residence or transaction histories do not match, the administrative problem may arise before the substantive tax question is examined.
The strongest objection
In 2023, the commitment was still future-facing. Describing it as if Portugal had already begun exchanging CARF information would overstate its legal effect. Its significance was directional: it made the future reporting environment foreseeable and gave taxpayers and service providers time to improve their records.
What changed since
The direction became law. DAC8 established the EU framework and Portugal adopted Law 26/2026, including a revised Article 124-A of the Personal Income Tax Code and related due-diligence, exchange and penalty provisions. The 2023 statement should now be read as the start of that implementation path, not as the operative endpoint.
General practical considerations
Users should be able to reconcile platform histories, private wallets, transfers, disposals and declared amounts. Service providers need a separate operational map covering scope, user due diligence, controlling persons, data protection, reporting deadlines and technical formats.
International transparency works through consistent identity and residence data. Changing platform or wallet does not change residence, and changing entity does not remove the need to identify the people whom the rules treat as reportable.
Key takeaways
- Portugal’s November 2023 announcement was a commitment to future CARF exchanges, not the start of exchange in 2023.
- CARF, DAC8 and Portuguese implementing law are connected but legally distinct layers.
- Reporting provides tax authorities with data; it does not by itself determine whether tax is due.
Sources
- Portuguese Tax Authority — joint CARF statement of 10 November 2023
- European Commission — DAC8 implementation
- Diário da República — Portuguese Law 26/2026
Disclaimer
This article provides general information only and does not constitute tax, legal or accounting advice. Reporting and tax outcomes depend on the applicable period, provider, user, transaction, residence and implementing rules.
