The Portuguese tax regime applicable to cryptoassets entered a new phase in 2026, with the implementation of the European DAC8 Directive and the strengthening of automatic reporting mechanisms between trading platforms and the Portuguese Tax Authority. This framework consolidates rules introduced in recent years and significantly enhances the authorities’ monitoring powers over digital asset transactions.
At the core of this regime remains the so‑called 365‑day rule, under which capital gains arising from the disposal of cryptoassets held for more than one year generally remain exempt from taxation. Conversely, gains obtained from assets held for shorter periods are subject to personal income tax, depending on the nature of the transaction and the taxpayer’s profile.
The key development lies in the automatic exchange of information obligations imposed on crypto‑asset service providers – both within the EU and in third countries with information‑exchange agreements – substantially reducing the scope for non‑compliance. As a result, private investors and professional operators are advised to carefully review their transactions and ensure full compliance with applicable tax reporting obligations.