Personal income from cryptocurrency gains aren’t taxed in Portugal. This is different from business income or capital gains (asset appreciation), but if you hold your crypto assets under your own name and not a company’s, they are essentially one and the same. The Portugese government has further clarified that sale of cryptocurrencies does not come under capital income or capital gains. However, if individuals carry out professional or business activity related to cryptocurrencies, that’s a different matter, and is liable to taxation