Singapore PR has no limited terms, but you have to renew it every five years. The grounds may be as follows: Political refugee (extremely high probability of refusal). Marriage. Investments in the economy (do not confuse with your own business in Singapore). The minimum amount is SGD 2.5 million. Own company. Legal employment (it isn't easy to get). Studying at a university in Singapore. Reunification with family (relatives). Official immigration programs. Please note that residence permit and permanent residence are different concepts, which you should not confuse. The primary conditions are sufficient financial status, medical insurance and no criminal records.