If you have double-paid National Health Insurance premiums or lost your enrollment eligibility retroactively, you may need to check whether a refund has been generated. The National Health Insurance Service (NHIS) operates a service that allows users to inquire about and apply for unpaid premium refunds.

When Refunds Are Generated

Health insurance premium refunds refer to amounts generated from causes such as double payment of premiums, retroactive loss of subscriber eligibility, or retroactive premium adjustments, which the NHIS has decided to return to the payer. However, paying excess premiums does not automatically result in a full refund; the refund amount is determined through the NHIS's verification and decision process.

How Workplaces Can Inquire and Apply Online

After logging in as a member, workplaces can inquire about and apply for health insurance and national pension premium refunds generated under their workplace management number. If a refundable amount is confirmed in the search results, they can apply according to the relevant procedure.

The Queried Amount Is Not Necessarily Paid as Shown

The amount displayed on the screen cannot be assumed to be paid out directly. Refunds may be offset against or substituted for premiums due in the future. Accordingly, at the time of actual application, the refund amount may be smaller than the initially stated amount, or there may be no payable amount remaining at all.

Workplaces with Restricted Online Applications

Workplaces with co-representatives or with unpaid premiums may be restricted from applying for refunds online. In such cases, they must check the relevant details through the NHIS customer center or their jurisdictional branch office.

Employment and Industrial Accident Insurance Refunds Are Handled by Korea Workers' Compensation and Welfare Service

Refunds for employment insurance and industrial accident insurance differ from the NHIS inquiry method. These refunds must be inquired about and applied for through the Korea Workers' Compensation and Welfare Service (COMWEL) total service.

Refund Eligibility Can Only Be Confirmed Through Direct Inquiry

Even if a refund has been generated, it may be difficult to know of its existence without checking directly. If you have previously paid duplicate premiums or experienced retroactive adjustments to your enrollment eligibility or premiums, you can verify your eligibility through the National Health Insurance refund inquiry service.

If you disagree with a refund decision or amount, you may review the appeals system according to the relevant procedures. However, since the specific scope and application procedures for appeals may vary depending on individual cases, it is necessary to check the official guidance from the National Health Insurance Service.

[This article was written with AI assistance. It is based on the National Health Insurance Service's guidance on premium refunds. Refund eligibility, actual refund amounts, and application availability may vary depending on the enrollment and payment status of individuals or workplaces. Please check the latest information through the official NHIS services before applying.]