According to the Portuguese government, the minimum stay requirements for permanent residence vary depending on the type of residence permit. Generally, to apply for a permanent residence permit, an applicant needs to live in Portugal for at least five years.
For five years before applying for permanent residence, an applicant must have been present in Portugal for almost at least months in a year consecutively or eight months across the five years.
Those who hold a temporary Portugal residence permit must renew it every year. Individuals are required to stay in Portugal for at least six months each year to maintain their status and be eligible for renewal. If you wish to remain in Portugal long-term and transition from a temporary permit to a permanent one, the minimum stay requirement is more than six months each year for five years.