To successfully open a standard bank account in Thailand as a foreigner, commercial banks generally require a valid long-term non-immigrant visa. Acceptable categories typically include a Non-Immigrant Business Visa accompanied by a work permit, a Non-Immigrant Retirement Visa, a Long-Term Resident (LTR) visa, or an Education Visa backed by official institutional documentation. Standard tourist visas or brief visa-exempt entries are widely rejected by major Thai banks due to strict regulatory compliance policies.