South Korea company search: Iros (iros.go.kr)

TL;DR. South Korea’s official corporate registry is the Supreme Court Internet Registry Office (Iros) at https://www.iros.go.kr. That page is online and titled index. It is a thin page that builds in the browser, so no company-search form, extract tariff or English interface was read from it; those screens are not documented here. For listed-company disclosures, https://dart.fss.or.kr is online, titled 전자공시시스템, and https://dart.fss.or.kr/eng is online, titled DART시스템. https://opendart.fss.or.kr is online, titled 전자공시 OPENDART 시스템. https://www.hometax.go.kr is online, titled 국세청 홈택스. Won extract fees are unknown rather than free; confirm at source. This page does not prescribe enhanced due diligence.

What is the official South Korea business registry?

South Korea’s corporate registry is administered by the Supreme Court of Korea under the Commercial Act (Sangbeop) and the Act on Registration of Commercial Business. Company registration sits in the court system. Physical registry offices (Deunggi-so) have been reported as attached to district courts.

The public online portal named in this guide is the Internet Registry Office (Iros) at https://www.iros.go.kr, titled index. That page is thin and builds in the browser. Certified-extract product names (Deunggi-bu Deunghonbon, Deunggi-bu Chobon) have been reported historically; they were not read from the live title, so this guide does not walk through those screens.

For listed companies, the Financial Supervisory Service (FSS) operates DART (Data Analysis, Retrieval and Transfer System) at https://dart.fss.or.kr, titled 전자공시시스템. The English path https://dart.fss.or.kr/eng is titled DART시스템. Those are listed-company disclosure hosts, not a replacement for Iros.

Every Korean legal entity has been reported as assigned a Corporate Registration Number (Bubindeunggi-beonho, 법인등기번호) at incorporation, distinct from the National Tax Service Business Registration Number (Saeopja-deungrok-beonho). Those identifiers were not labelled on the Iros title; confirm at source. The Public Data Portal at data.go.kr was not checked for this guide.

What can you search?

Iros. The live title is index. No name field, number field or extract button was read from that thin page, so search behaviour is not documented here; confirm at source.

DART (listed companies). https://dart.fss.or.kr is titled 전자공시시스템. The English path is titled DART시스템. Search fields, filing types and English-summary availability were not read from those titles; confirm at source.

National Tax Service Hometax. https://www.hometax.go.kr is titled 국세청 홈택스. That is a thin page. No Business Registration Number lookup form was read from it; confirm at source.

How much does it cost?

No won extract figures appear on the Iros, DART, OpenDART or Hometax titles, so the table reads unknown rather than free; confirm at source. No payment methods are published on those titles.

Do you need a local account or ID?

Unknown from those pages. Iros is titled index, not a sign-in title, so an account and a local ID are shown as optional rather than confirmed open access. A foreigner account path without a Korean Resident Registration Number has been reported; confirm at source. DART and Hometax account rules were not read from their titles.

Is the website in English?

No, for Iros. The live title is the English word index on a thin page; no English company-search interface was read from it. This guide treats Iros as Korean-only.

DART has an English path at https://dart.fss.or.kr/eng, titled DART시스템. Whether filed documents on that path are Korean, English or mixed was not read from the title; confirm at source. Hometax is titled in Korean (국세청 홈택스).

What’s the turnaround time?

Unknown. No turnaround is published on the Iros, DART or Hometax titles; confirm at source.

Is there an API?

https://opendart.fss.or.kr is online, titled 전자공시 OPENDART 시스템. That is the OpenDART address used as the API documentation URL in this guide. API-key registration, rate limits, commercial-use rules and coverage were not read from that title; confirm at source.

Iros does not publish a public API on the title index. The Korea Public Data Portal was not checked for this guide.

What you legally cannot do

Supreme Court terms for Iros have been reported as restricting automated bulk downloading and commercial redistribution of certified extracts; confirm at source. Those terms were not read from the Iros title.

DART filings are public disclosures operated by the FSS. Hometax is the National Tax Service portal named in the live title. Korea’s Personal Information Protection Act (PIPA, 개인정보보호법) has been reported as relevant to director names and addresses in registry documents; confirm at source. This page does not prescribe a screening workflow.

For the broader due-diligence framework, see our Global Business Due Diligence Guide.

Practical tips for foreign users

• Iros is a thin page titled index. It builds in the browser. This guide does not walk through a search form it could not read, and it does not treat that page as an English extract shop.
• DART is a separate listed-company system. 전자공시시스템 at dart.fss.or.kr, with an English path titled DART시스템. That is not Iros.
• opendart.fss.or.kr is online titled 전자공시 OPENDART 시스템. Confirm coverage and access rules on that host.
• Hometax is online titled 국세청 홈택스. No lookup form was read from that thin page.
• Corporate Registration Number versus Business Registration Number has been reported as a 12-digit court identifier versus a 10-digit tax identifier. Neither format was labelled on the Iros title; confirm at source.
• Entity-type vocabulary (Jusik-hoesa, Yuhan-hoesa, Yuhan-chaegim-hoesa) has been reported; confirm at source. Those labels were not read from the Iros title.
• FATF listing was not read here. fatf-gafi.org is online; confirm at source. This page does not prescribe enhanced due diligence.

Alternatives if you cannot access the registry directly

The Iros home is a thin Korean page titled index, so a non-Korean-speaking reader will not find a documented English extract path on that host.

• OpenDART at https://opendart.fss.or.kr, titled 전자공시 OPENDART 시스템, for listed-company disclosure data when that host’s access rules allow it.
• Local data suppliers (see section below) were not checked for this guide.

Local data suppliers

If a packaged report is needed rather than a raw Iros extract, South Korea has been described as having a small set of established providers. The following hosts were not checked for this guide and are named only:

• NICE Information Service (nice.co.kr)
• NICE BizLine (nicebizline.com)
• Korea Enterprise Data (KED) (kedkorea.com)

Use Iros for the official court registry record when a search form can be confirmed on that host. No such form was read from the title index.

FAQ

Can a foreign company access South Korea’s Iros registry without a Korean identity number?

Iros is reachable and titled index. Whether a foreigner account path, a credit-card form or a Resident Registration Number prompt sits behind that thin page was not read; confirm at source.

What is the difference between the Corporate Registration Number and the Business Registration Number?

Those two numbers have been reported as the Supreme Court 12-digit identifier versus the National Tax Service 10-digit identifier. Neither was labelled on the Iros title; confirm at source. Hometax is a separate host titled 국세청 홈택스.

Where do I find a Korean company’s directors and shareholders?

Director fields on an Iros extract have been reported historically; they were not read from the title index. Shareholder information for listed companies has been reported as sitting in DART. Private-company shareholder registers have been reported as not public on Iros or DART; confirm at source.

Is South Korea on the FATF grey list?

South Korea’s current listing is not stated here. fatf-gafi.org is online; see it for the published lists. This page does not prescribe enhanced due diligence.

How current is DART data for listed companies?

Not published on the DART titles 전자공시시스템 and DART시스템; confirm at source.

Does South Korea have a beneficial ownership (UBO) register?

No beneficial-ownership search was read from Iros (title index) or from the DART titles. Listed-company disclosure through DART and financial-institution reporting have been reported as separate from a single public private-company UBO register; confirm at source.

What should I check when verifying a Korean chaebol subsidiary?

Iros is the court registry named in this guide; DART is the listed-company disclosure system. Exact registered name, Corporate Registration Number, Representative Director and parent-subsidiary relationships have been reported as the usual file contents; they were not read from the live titles. Confirm at source.

Last verified: 2026-09-06. Sources: iros.go.kr, titled index (thin page); dart.fss.or.kr, titled 전자공시시스템; dart.fss.or.kr/eng, titled DART시스템; opendart.fss.or.kr, titled 전자공시 OPENDART 시스템; hometax.go.kr, titled 국세청 홈택스; fatf-gafi.org, online. No won search tariff is published on those titles. For the full global due diligence framework, see our Global Business Due Diligence Guide.