Korean Health Insurance Dependents Lose Eligibility Above KRW 20 Million in Annual Income — With Property Over KRW 540 Million the Limit Falls to KRW 10 Million, and Above KRW 900 Million Eligibility Ends
If a parent or spouse is listed as a dependent on your health insurance, they pay no premium of their own. But that status is not permanent: it ends the moment income or property goes over the limit, and the person becomes a regional subscriber who receives a new premium bill. Here is a numbers-based walk-through of which income is added together and why a larger property halves the income limit.
A dependent must meet all three requirements
The National Health Insurance Act recognizes family members who rely on an employee subscriber for support, but only if they satisfy the support relationship, income, and property requirements together. Spouses, direct ascendants (parents, grandparents), and direct descendants (children, grandchildren) are covered, while siblings face separate conditions such as age or disability. Even with the right family relationship, exceeding either the income or the property limit means the status cannot be kept.
The KRW 20 million income limit adds up every kind of income
According to National Health Insurance Service guidance, the income requirement is combined annual income of KRW 20 million or less across interest, dividends, business, wages, pensions, and other income. Each item can look small, but the total often exceeds the limit. For example, a pension of KRW 12 million, deposit interest of KRW 5 million, and business income such as rent of KRW 4 million total KRW 21 million, which is KRW 1 million over. Some commentary says that for married people both spouses must meet the requirements, so checking your own case with the Service is the safe course.
A business registration can block eligibility even with low income
As a rule, a person with a business registration is excluded once business income arises. Material citing Service guidance says that without a registration, business income is accepted only up to KRW 5 million a year. If a parent has started a small rental or side business, check the registration status first, even when the income is small. Amount thresholds can be revised, so confirm with the Service at 1577-1000 before you file.
Above KRW 540 million in property, the income limit drops to KRW 10 million
Property is measured by the property tax base. At KRW 540 million or less the income limit is KRW 20 million a year; above KRW 540 million up to KRW 900 million it is KRW 10 million; above KRW 900 million a person cannot be a dependent regardless of income. This is the tax base, not market price, so a high-priced home may have a lower base and the reverse can also be true. Check the tax base on your property tax notice or through Wetax first. With a base of KRW 600 million, the KRW 21 million example above fails, and so would anything over KRW 10 million.
Financial income of KRW 10 million is where the counting method changes, not a cutoff
Some commentary says that once financial income exceeds KRW 10 million, all of it enters the insurance income calculation. That alone does not disqualify anyone; the final test is whether the total with other income is KRW 20 million or less. Recalculate the total when a large deposit matures and interest suddenly jumps. Rising public pensions also feed into combined income. When deciding whether to claim a pension early or defer it, read the reduction rates in our guide to early versus deferred National Pension claims.
What changes when you add a dependent or lose the status
To register a new dependent, the employee subscriber files a dependent qualification report through the workplace or with the Service, and documents proving the family relationship may be required. The documents differ by relationship, so ask the Service before filing. Losing the status turns the person into a regional subscriber whose premium is based on points for income and property, so a premium that was zero suddenly appears. That is why it pays to calculate in advance, before a loss notice arrives.
If you lose eligibility, file an objection within 90 days
Guidance says income data are refreshed from around November each year using the prior year's figures, so status can change then. If you disagree with a loss of status, the National Health Insurance Act lets you file an objection with the Service within 90 days of learning of the decision. If the income data are wrong, first check for corrections with the National Tax Service or the pension agency; if not, estimate the regional premium in advance. If you are leaving a job and want to keep workplace coverage, voluntary continued coverage is another option.
Summary of steps
Step 1, add up every kind of income the family member had last year. Combine interest, dividends, pensions, wages, business, and other income and see whether it is KRW 20 million or less.
Step 2, check whether the property tax base falls below KRW 540 million or between that and KRW 900 million. The income limit is KRW 20 million, KRW 10 million, or not eligible depending on the band.
Step 3, review business registration and any rental or side income, then confirm your case with the Service at 1577-1000 or a nearby office. For how tax applies when you draw a pension savings account, see our pension savings and IRP guide, and ask the Service separately how it counts toward health insurance income.
This article is general information based on Service guidance and commentary; thresholds can be revised and it does not replace advice on an individual case.
All content is fact-checked under our editorial standards.