Korea Raises Data Breach Fines to 10 Percent of Revenue

Stricter Penalties Target Corporate Negligence

South Korea has strengthened its data protection laws by increasing penalties for companies responsible for major data leaks. The Personal Information Protection Commission announced the change on September 10, 2026, allowing fines of up to 10 percent of annual revenue for serious negligence. The update aims to deter careless handling of personal information and improve accountability across industries.

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Under the revised rules, firms that fail to implement adequate security measures or ignore known vulnerabilities may face significantly higher financial penalties. Previously, fines were capped at a lower percentage of revenue or fixed amounts, which critics argued did not sufficiently deter large corporations. Chairperson Song Kyung-hee emphasized that the new threshold reflects the growing scale of data breaches and the need for stronger corporate responsibility. The commission cited recent incidents involving healthcare and retail sectors as motivation for the update, noting that compromised data often includes sensitive personal and financial details.

How Will Companies Adapt to the New Rules?

Businesses are now under greater pressure to invest in cybersecurity infrastructure, conduct regular audits, and train employees on data protection protocols. Legal experts predict a rise in compliance spending as firms seek to avoid penalties that could reach hundreds of millions of won for major conglomerates. Smaller companies may struggle with the financial burden, prompting calls for grace periods or technical support from the government. The commission stated it will provide guidelines to help organizations interpret the new standards, particularly around what constitutes „serious negligence.” Frequently Asked Questions What qualifies as a major data leak under the new rules? A major leak involves widespread exposure of personal data due to inadequate security measures, such as unpatched systems or lack of encryption, especially when the company ignored prior warnings.

Will the fines apply to foreign companies operating in Korea? Yes, the rules apply to any company processing personal data of South Korean residents, regardless of where the company is headquartered, if it falls under the commission’s jurisdiction.

How will the commission determine a company’s annual revenue for fine calculation? Revenue will be based on the company’s most recent financial statements filed with Korean regulatory authorities, using consolidated figures where applicable.