Written with people moving from Turkey in mind. The Portuguese rules still apply more broadly.
Permanent Residency (5 Years)
After 5 years of temporary residency, you can apply for Permanent Residency. Unlike citizenship, this does not give you a passport, but it grants a 10-year renewable card and protects you from deportation.
You still need to prove basic Portuguese knowledge (A2 level) and financial means. It is a good alternative for those whose home countries do not allow dual citizenship.