South Korea — Registration & Annual Compliance

Domestic and foreign companies in South Korea must register their formation or business presence with the appropriate court registry under explicit statutory authority. This foundational step sets the legal and practical framework for all entity-compliance tasks in Korea.

Scope and covered entity types

• The Commercial Act (상법) defines "foreign companies" as entities formed outside South Korea, which must register a business office and representative if conducting business in Korea. Registration must be completed with the court registry within three weeks of establishing a business office.
• The Commercial Registration Act (상업등기법) governs the corporate registration process, requiring both newly formed domestic companies and registering foreign companies to submit applications to the court-based registry system. Applications are filed by the company’s representative or court-authorized agent.

Responsible office and filing method

• The registry division of the local court (법원등기과) is the statutory authority for entity registration, handling domestic incorporations and foreign company registrations alike. Filings must comply with the requirements set out in the Commercial Registration Act and can be submitted in person or electronically via the Supreme Court's Internet Registry Office portal (https://www.iros.go.kr), per regulatory practice.

Governing statutes and deadlines

• Foreign companies establishing a business office in Korea must file for registration within three weeks, as required by the Commercial Act, Article 614. Failing timely registration can lead to regulatory penalties.
• The forms, responsible party, and procedural rules for both domestic and foreign company registration are set forth in the Commercial Registration Act and its enforcement rules, with detailed procedures posted by the National Law Information Center.

In summary: Corporate registration—whether for domestic entities or foreign company branches—is a court-regulated process, strictly governed by the Commercial Act and Commercial Registration Act. All entity types seeking to do business in South Korea must engage the court registry system and comply with statutory deadlines and documentation requirements.

Source: Commercial Act, Article 614 ; Commercial Registration Act (English translation)

All domestic corporations and foreign companies with a permanent establishment in South Korea are required to file an annual corporate income tax (법인세, beo-in-se). The National Tax Service (NTS) enforces strict deadlines and submission procedures, which apply uniformly to Korean-incorporated entities and qualified foreign businesses.

Filing deadline

• The annual corporate income tax return must be filed within three months from the last day of the month in which a corporation's fiscal year ends. For companies whose fiscal year aligns with the calendar year (ending December 31), the filing deadline is March 31 of the following year. This statutory due date is set by Article 60 of the Corporate Tax Act.
• Failure to file by the deadline may result in penalties for late submission and additional tax assessments. Extensions are rarely granted outside of force majeure (extraordinary events beyond the taxpayer's control).

Electronic filing via Hometax

• Returns are filed electronically through Hometax (홈택스), the official portal administered by the NTS. Entities must register on the Hometax platform in advance and prepare digital versions of their financial statements, detailed tax calculations, and supporting documents (such as audit reports when applicable).
• The system supports filing in Korean. While English-language versions of guidance are occasionally available, the filing itself must be submitted in Korean.
• Major corporations or those subject to external audit obligations may have additional documentary requirements. Large filers or those subject to desk audit may also need to supplement with paper attachments, though most filings are fully paperless.

Who must file

• Domestic corporations (설립법인) regardless of activity.
• Foreign corporations (외국법인) with a fixed place of business in Korea, for their Korea-source income only.

This filing is distinct from the payment of tax: the return establishes the tax liability, while payment is processed through the same Hometax portal or designated bank. Both must be timely for the entity to remain in good standing and avoid compliance risk.

Source: National Tax Service — Corporate Income Tax Filing Deadline (Korean) ; National Tax Service — English Corporate Income Tax Guidance ; Corporate Tax Act, Art. 60 (Korean)

Registering a company in South Korea—either as a domestic corporation or a foreign branch—requires filing a formal application and supporting documents with the registry division of the competent district court. The Commercial Registration Act and its Enforcement Decree govern the core documentary requirements and filing method for both domestic corporations and foreign branches, though some practical details (such as precise forms or ancillary evidence) may be set by local court regulation.

Domestic company registration (설립등기, seol-lib deung-gi):

• The application is filed by the company’s legal representative or a court-authorized agent at the district court registry for the entity’s head office.
• Statutory core documents include:
• Articles of Incorporation (정관, jeong-gwan)—signed and notarized if required by the company type.
• Evidence of paid-in capital (bank certificate or equivalent)—specifics are set by the Enforcement Decree for each company form.
• Written consent and personal identification of directors and representative director.
• Proof of address for the principal office (such as office lease or property registry extract).
• Seal impression certificate (인감증명서) for the representative director.
• Other items only as required by the Commercial Registration Act, Enforcement Decree, or local court administrative direction (including, for regulated industries, certain permits or consents—these are not universally required).
• The statutory registration fee is calculated as a percentage of company capital, but there is a minimum level—often referenced as KRW 150,000 or 0.4% of capital (whichever is greater). The actual figure may vary by court and should be checked against the latest local schedule or enforcement direction. The precise amount should be confirmed by reviewing the Enforcement Decree or contacting the relevant court at the time of filing. Unable to confirm as of 2026-07-11.

Foreign company (branch or liaison office) registration:

• Foreign companies must register with the district court at the branch office address after establishing a Korean place of business. Key statutory requirements (Commercial Registration Act, Article 20) are:
• A certificate of company registration or incorporation—duly legalized by apostille or consular authentication.
• Translation of all foreign-language documents, certified as accurate (per Article 24).
• Parent board resolution (or equivalent) approving the branch and designating the Korea-based representative.
• Proof of the local representative’s identity (passport or ID) and seal impression or notarized signature specimen.
• Documents establishing the office’s Korean address (lease or real estate register extract).
• As with domestic filings, regulated sectors or non-standard structures may require additional evidence as set by local court instructions.
• Filing can be completed in person or via the Supreme Court IROS Electronic Registry Office (https://www.iros.go.kr). The platform supports digital submissions, as confirmed by the portal’s public guidance.

Every substantive requirement but the exact fee/minimum is grounded in the cited statutes; filers should monitor the local court or the Supreme Court electronic portal for any changes or ancillary documentary instructions before submitting.

Source: Commercial Registration Act (Articles 4, 20, 24), Enforcement Decree; Supreme Court IROS Electronic Registry Office Unable to confirm as of 2026-07-11.

Any foreign company registering a branch or liaison office in South Korea must appoint at least one local representative (대리인) whose primary residence is in Korea. This is a statutory requirement under Article 20 of the Commercial Registration Act (상업등기법).

Appointment and registration

• Article 20(2) of the Commercial Registration Act requires that a foreign company’s Korean branch or office have a representative habitually residing in Korea. The address and identity of this representative must be included in the registration filing submitted to the district court registry.
• If a foreign company modifies the appointment—such as by naming a new representative or if the representative’s details change—Article 24 requires prompt registration of the change. The new information must be reported without delay to the same court registry.

Who may serve

• The representative may be any person (Korean or foreign national) who actually lives in Korea. Typically, companies appoint a branch manager or similar figure empowered to act for the entity within Korea. The statute does not specify professional qualifications.

Effect of non-compliance

• The law requires a continuously-registered representative with habitual residence in Korea as a condition for the branch’s legal registration. If this appointment lapses or is not properly reported, the branch is not compliant with statutory registration rules. The statute requires registration of changes, but it does not specify particular penalties, suspension, or enforcement mechanisms for failure to maintain an eligible representative or to register changes. Unable to confirm as of 2026-07-11.

Source: Commercial Registration Act (Article 20, Article 24) — English translation

Foreign liaison offices (also called "representative offices") in South Korea—entities established by a foreign corporation to conduct only non-commercial, non-revenue-generating activities such as market research and liaison functions—are subject to a mandatory annual status report requirement, separate from the registry or standard tax filings required of branches or domestic companies.

Who must file:

• Only foreign liaison offices operating strictly in a non-commercial capacity must file this annual report. Foreign revenue-generating branches and domestic corporations do not fall under this specific obligation.
• This obligation is established by Article 94-2 of the Corporate Tax Act (법인세법).

Filing deadline and law:

• The liaison office must submit a "Status Report for Foreign Liaison Office" (외국법인연락사무소 현황신고서) to the National Tax Service (NTS) annually, by February 10, covering the previous calendar year's activities. This deadline is set by Article 94-2(3).

Filing procedures:

• The report must disclose key details about the liaison office, including business activities performed, the local representative’s information, personnel data, and a certification of non-generation of Korean-source income. The Corporate Tax Act and its Enforcement Decree set the statutory elements, but detailed forms and instructions are published by the NTS.
• Filers may use the NTS Hometax system (https://www.hometax.go.kr) or submit directly to the local tax office. The mechanics of the e-filing process are not detailed in the statute but are publicly referenced on the NTS portal.

Penalty for late or non-filing:

• Failure to file the annual status report can result in an administrative fine. The Framework Act on National Taxes, Article 81 authorizes fines, with the ceiling stated in the Act (KRW 1 million as of publication). The precise penalty and application may vary.

This annual status report for non-revenue liaison offices is distinct from the annual corporate income tax return required of domestic corporations and foreign branches (covered in the section on annual tax compliance). The requirement exists even if no Korean-source income is generated during the year—there is no exemption for inactivity or lack of commercial operations explicitly provided in the statute.

Source: Corporate Tax Act, Article 94-2 (Korean); Framework Act on National Taxes, Art. 81; NTS Hometax Portal