The Verdict: Need More Info
Nothing here opens until you are married and the marriage is registered. Register at a district office in Thailand or a Thai embassy, then come back to this quiz.
Thai law has no de facto or partner category; living together creates nothing.
Registration opens the marriage visa straight away. After about three years, a foreign wife of a Thai man can apply for nationality directly, and a foreign husband naturalises after three years on marriage extensions without permanent residence. Same-sex marriage is registrable, but the nationality rules are untested for it.
Meanwhile, our skilled migration, digital nomad and retirement quizzes cover routes that do not depend on marriage.