E-4 (Technology Instructor) Korea Visa Guide | 2026

1. What E-4 Is

E-4 covers foreign nationals who provide natural-science expertise or specialized industrial-sector technical know-how to a public or private organization in Korea. It applies to people supplying advanced industrial technology that is not otherwise obtainable domestically to a Korean public/private organization; people dispatched by a foreign service-contracting company to provide technology in a specialized industrial field; and people providing specialized technology that a domestic industrial enterprise has already licensed/imported (a 'technology introduction contract' scenario).

2. Eligibility Checklist

• Role fits current E-4 technical scope.
• Host need and project rationale are clearly documented.
• Technical credentials and experience are verifiable.
• Contract period aligns with requested stay period.
• No unresolved status-compliance issues exist.

3. Criteria Summary

• E-4 is not points-based.
• Review is role-fit and host-need evidence driven.
• Generic role descriptions often trigger supplements.
• Substance and consistency of technical records are critical.

4. Salary and Contract Rules

• E-4 does not use E-7 points/salary thresholds.
• Compensation terms should align across all contract records.
• Project and engagement terms should be internally consistent.
• Material inconsistencies can delay or block approval.

5. Employer and Workplace Change Rules

• E-4 is host/project linked in ordinary handling.
• Host or project changes may require reporting/permission.
• Out-of-scope additional activity can create compliance risk.
• Keep project scope and location records up to date.

6. Required Documents

• Application form, passport, ARC (if applicable), photo, and fee proof.
• Host request letter and technical role description.
• Technical qualification and career evidence.
• Project/contract records and sponsor-company documents.
• Additional office-requested documents.

7. Fees and Processing

• Fees follow current issuance/change/extension fee tables.
• Processing time varies with technical-role verification complexity.
• Supplement rounds are common when host need is unclear.
• Submit complete technical evidence early.

8. Common Rejection Reasons

• Planned activity does not satisfy E-4 scope.
• Host need evidence is insufficient or inconsistent.
• Technical credentials do not support the proposed role.
• Unreported host/project changes affect compliance review.
• Core facts cannot be verified by reviewing office.

9. FAQ