FilingsTodayAudit opinions in Korea and why they matter
Updated 2026-10-31
For a Korean listed company, the audit opinion on the annual financial statements is more than a technical statement. A non-clean opinion can lead directly to a trading halt, an administrative issue designation or delisting. Every spring, as December year-end companies file their audit reports in March, the Korea Exchange publishes a list of companies with new delisting reasons, and most of them come from audit opinions.
The four opinions
| Opinion | Korean term | Meaning |
|---|---|---|
| Unqualified (clean) | 적정 | The statements are fairly presented in all material respects |
| Qualified | 한정 | Fairly presented except for a specific problem, either a disagreement on accounting or a limit on what the auditor could check |
| Adverse | 부적정 | The statements are materially wrong overall |
| Disclaimer | 의견거절 | The auditor could not get enough evidence to form an opinion, or serious doubts about going concern made an opinion impossible |
For a qualified opinion, the reason matters. A scope limitation (감사범위 제한) means the auditor could not examine something, for example the records of a subsidiary or the existence of an asset. This is treated more seriously than a narrow accounting disagreement.
Going concern
An auditor who sees a significant uncertainty about whether the company can continue operating, but who believes the statements disclose it properly, gives an unqualified opinion with a separate paragraph on material uncertainty related to going concern (계속기업 존속능력에 관한 중요한 불확실성). This paragraph is not itself a delisting reason, but it is a strong warning. It usually appears with large losses, debts falling due soon, or capital impairment. If the uncertainty is severe and not resolved, the next step can be a disclaimer.
From audit opinion to exchange action
The rules differ between the two markets, and the exchange applies them as soon as the audit report is filed. In outline:
| Annual opinion | KOSPI | KOSDAQ |
|---|---|---|
| Qualified | Administrative issue designation | Delisting reason if due to scope limitation |
| Adverse or disclaimer | Delisting reason | Delisting reason |
The half-year review report matters too: an adverse conclusion or a disclaimer in the review of half-year statements can lead to administrative issue designation. Exact conditions are in each market's listing rules.
When a delisting reason arises, trading is halted. The company can file an objection, usually within 15 days. The exchange may then give an improvement period, during which the company typically gets a re-audit (재감사) or tries to obtain a clean opinion on the next year's accounts.
The 2025 reform
Under the IPO and delisting reform announced by the FSC and the exchange in January 2025, the process became stricter:
- A company that receives a non-clean opinion that is a delisting reason for two years in a row is delisted without the chance to object. Companies in court rehabilitation or a creditor-led workout are an exception.
- Even after a clean re-audit, the exchange can still start a substantive listing review.
- Maximum improvement periods were shortened, and formal and substantive reviews can run at the same time.
See the exchange designations guide for how administrative issues and substantive reviews work.
Worked example
A hypothetical KOSDAQ company has share capital of ₩10B. After several years of losses its equity is ₩4B, so capital impairment is 60%. In its audit report:
- The auditor gives an unqualified opinion with a going-concern paragraph. The opinion itself is clean, but the 60% impairment at year-end is a reason for administrative issue designation, because it is above the usual 50% trigger.
- Instead, suppose the auditor cannot verify ₩3B of advance payments to a supplier and issues a disclaimer. This is a delisting reason. Trading is halted, the company objects and receives an improvement period, and it commissions a re-audit.
- If the re-audit is clean, the delisting reason is removed, though a substantive review may still follow. If next year's opinion is again a disclaimer, the 2025 rule means the company is delisted.
For shareholders, the long halt is often the biggest practical problem: the shares cannot be sold until a decision is made, and if delisting goes ahead there is only a short liquidation trading period (정리매매).
Warning signs before the opinion
- The audit report is late. Companies file a notice when they expect to miss the deadline, often citing incomplete audit procedures.
- A sudden change of auditor or a dispute with the auditor.
- Large advance payments, loans to related parties, or investments in unlisted companies with unclear value.
- Frequent convertible bond issues and changes of largest shareholder (see convertible bonds).
- An exchange inquiry about rumours of an audit opinion. Exchange notices appear on the market actions page.
Comparison with the US
US auditors use the same four opinion types, and going-concern paragraphs work in the same way. But a non-clean opinion is very rare among US-listed companies, because the SEC generally does not accept financial statements with a qualified or adverse opinion in annual filings. US exchanges treat audit problems through their general listing standards and the late-filing process, announced in an 8-K. Korea links specific opinion types to specific exchange actions, so the consequences are faster and more mechanical.