The primary concern for permanent residents traveling abroad is whether they can clearly demonstrate to USCIS their intent to permanently reside in the United States—this is accomplished by establishing obvious ties to the U.S., such as family, housing, employment, bank accounts, etc. Travel frequency is less of an issue than length of time spent abroad—any absences of six months or more will raise a rebuttable presumption that permanent resident status has been abandoned. Absences of more than a year require a reentry permit.