Table of Contents
- Legal Basis and Validity Period
- When to Apply for Extension
- The Renewal Assessment and Pass Mark
- How the New Term Is Counted
- Changes During the Term — Reissuance and Succession
- Cancellation Grounds and Follow-up Review
- FAQ
A Mainbiz (management innovation SME) certificate in Korea is valid for 3 years from its issue date. To keep it, the company must apply for extension between 90 days before and 30 days after expiry and score 700 points or more in the renewal assessment. That assessment uses a separate diagnosis table, and the start of the new term depends on when the renewed certificate is issued.
This guide is based on the Act on the Promotion of Technological Innovation of Small and Medium Enterprises (중소기업 기술혁신 촉진법), its Decree and the Ministry of SMEs and Startups notice on the Main-Biz system (경영혁신형 중소기업(Main-Biz) 제도 운영규정). Officially, "renewal" is an "extension of the validity period".
Legal Basis and Validity Period
A management innovation SME is one selected by the Minister under Article 15-3 of the Act (Article 2, item 4-2), on criteria for innovation activities and results announced under Decree Article 13. Neither states a validity period; the Ministry notice does (Notice Article 1). Notices change often, so check the current one — Notice No. 2026-45 of 22 June 2026.
PMS is the productivity management system certification. A company with PMS grade 3 or higher, within 1 year of certification, may be selected on the Korea Productivity Center's review (Notice Articles 2 and 7(4)), and its term then follows the PMS term. Certificates are issued by the regional SMEs and Startups office and can be downloaded from Mainbiz-net and SME 24, in English and Chinese too (Article 12(1), (2) and (4)).
When to Apply for Extension
The management body, the Korea Management Innovation SME Association, must notify the company at least 90 days before expiry (Notice Articles 2 and 15(1)). The company re-enters its data on Mainbiz-net, self-diagnoses and applies; an institution is assigned within 3 days.
| Timing | What happens | Basis |
|---|---|---|
| By 90 days before expiry | Management body notifies the company | Notice Art. 15(1) |
| From 90 days before expiry | Extension application opens | Notice Art. 15(1) |
| By 35 days before expiry | Deadline for confirmation before expiry | Notice Art. 15(1) proviso |
| Expiry date | Existing certificate ends | Notice Art. 12(3) |
| Within 30 days after expiry | Last day to apply | Notice Art. 15(1) |
The key row is "35 days before expiry": a company wanting confirmation before expiry must apply by then. The rules allow 21 days from application to registration of the result and 7 days from registration to the renewed certificate (Article 15(3) and (4)), so plan around the 35-day proviso to avoid a gap.
No rule extends the window if the reminder never arrives. A company selected through PMS generally follows the same procedure, but if it keeps its PMS certification within the deadline, re-selection is processed on the PMS review (Article 15(2)).
The Renewal Assessment and Pass Mark
First selection uses the indicators in Table 1; extension uses the management innovation diagnosis table in Table 2 (Notice Article 6). Table 2 groups items into innovation infrastructure, activities and results, weighted 350, 400 and 250 points in the manufacturing re-selection table, for 1,000 points in total. Recorded results from the past 3 years are the core.
| Type (Table 2) | Score band | Extension |
|---|---|---|
| Creative | 900–1,000 points | Possible (700 or more) |
| Growth | 800–899 points | Possible (700 or more) |
| Basic | 700–799 points | Possible (700 or more) |
| Foundation (pre-Mainbiz) | 600–699 points | Not possible (below 700) |
The Korea Credit Guarantee Fund, Korea Technology Finance Corporation or Korea Productivity Center assesses, and may entrust this to the management body (Articles 2 and 15(8)). Results must be registered within 21 days of the application, but time lost through unpaid assessment cost or a postponement requested by the company may be excluded, up to 90 days (Articles 15(3) and 10(2)). Companies below 700 points are notified that the term cannot be extended (Article 15(6)).
Under Act Article 15(4), applied by Article 15-3(3), applicants bear assessment costs set by notice: KRW 400,000 excluding VAT for the extension assessment (Notice Article 18(1)2, as of 3 October 2026), paid to the institution and subject to change.
How the New Term Is Counted
The new 3-year term starts as follows (Article 15(5)):
- Issued within the existing term — 3 years from the day after the existing expiry date, so renewing early loses nothing.
- Issued after the term ended — 3 years from the issue date, leaving a gap with no valid certificate.
For example, if a term ends on 31 March, a certificate issued before then starts the new term on 1 April; one issued on 20 April starts it on 20 April, with no valid certificate from 1 April to 20 April. Programmes requiring a valid certificate may not recognise Mainbiz status in that gap.
If you miss the 30-day window, the extension procedure is closed. The notice has no later extension rule, so returning appears to require new selection: a self-diagnosis of 600 points or more, then an on-site assessment against Table 1 with a pass mark of 700 points (Articles 7(1), 7(2) and 11(1)). A renewed certificate keeps the original number with an R prefix (Article 15(7)), and the regional office records the extension on Mainbiz-net (Article 19).
Changes During the Term — Reissuance and Succession
If company details change, the company may apply to the regional office for reissuance using Form 4 (Article 13(1)):
| Change | Action | Basis |
|---|---|---|
| Trade name, location or representative (not a sole proprietor's representative) | Apply for reissuance | Notice Art. 13(1)1 |
| Loss or damage of the certificate | Apply for reissuance | Notice Art. 13(1)2 |
| Incorporation, acquisition, merger, consolidation or change of entity type | Apply for reissuance to succeed to the selection | Notice Art. 13(1)3, Art. 14 |
Reissuance is approved within 7 days (Article 13(2) and (3)). It does not extend the term: the reissued certificate keeps the previous validity period, and in a merger the term of the company with the larger equity share applies (Article 13(4)).
Succession requires the conditions in Article 14. When a sole proprietorship incorporates, the same business (KSIC sub-class) must continue, main facilities must be contributed in kind with assets and liabilities taken over, and the former owner must be a full-time director and a shareholder (Articles 14 and 5(1)). In a merger by absorption, succession is possible if the surviving company is a Mainbiz; otherwise it needs the same business, at least 50% of sales and a majority of full-time directors from the absorbed company (Articles 14 and 5(2)). Entity type changes and a representative change after family business succession relief are also covered (Article 14, items 5 and 6). There is no reissuance deadline, but an outdated certificate is hard to use.
Cancellation Grounds and Follow-up Review
The Minister may re-assess a selected company against Table 1 where needed (Article 16). The regional office may cancel a selection on the grounds below and must cancel on grounds 1 to 3 (Article 17(1)):
| Ground | Nature | Basis |
|---|---|---|
| Voluntary return | Mandatory | Notice Art. 17(1)1 |
| Assessment obtained with false records | Mandatory | Notice Art. 17(1)2 |
| Loss of eligibility under Article 3 | Mandatory | Notice Art. 17(1)3 |
| Management not normalised (closure, suspension, financial restrictions, tax arrears) | Discretionary | Notice Art. 17(1)4 |
| Failing criteria after follow-up review | Discretionary | Notice Art. 17(1)5 |
Under Article 3(2), companies registered for arrears with the Korea Credit Information Services, under a suspension of bill transactions, in bankruptcy, rehabilitation or liquidation (except those duly performing an approved plan), or with a debt ratio of 1,000% or more or full capital impairment at the previous fiscal year-end are not eligible (items 1 to 5). The 22 June 2026 amendment added item 6: within the last 3 years, public listing for unpaid wages, public naming for industrial accidents, a fair trade corrective order, or a subsidy participation ban.
The management body checks at least 1 time a month whether selected companies fall under a ground and notifies the regional office, which must retrieve the certificate within 15 days of cancellation and publish it on Mainbiz-net (Article 17(2) and (3)).
The texts are on the National Law Information Center (the Act, the Main-Biz Operation Regulation), and applications are made on Mainbiz-net. Costs vary case by case and are explained precisely during the free consultation.
FAQ
Q. Is a Mainbiz certificate extended automatically?
A. No. You must apply (Article 15(1)) and score 700 points or more (Article 15(4)).
Q. Can I still apply after my certificate has expired?
A. Yes, within 30 days after expiry (Article 15(1)). The new term then runs for 3 years from the issue date under Article 15(5), leaving a gap.
Q. By when must I apply to be renewed before expiry?
A. At least 35 days before expiry (proviso to Article 15(1)). The new term then starts on the day after the existing expiry date.
Q. Does reissuance after a name or representative change give a new 3-year term?
A. No. Under Article 13(4) the previous term is kept; in a merger the term of the company with the larger equity share applies. Approval comes within 7 days (Article 13(2)).
Q. What if my debt ratio exceeds 1,000% during the term?
A. Article 3(2)4 bars eligibility at 1,000% or more, and Article 17(1)3 makes loss of eligibility a mandatory cancellation ground.
Is your Mainbiz term ending, or have your company details changed?
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