How to Calculate 100% of Median Income for a Single-Person Household

The 100% median income figure for a single-person household can be calculated with a single formula: dividing the standard amount for a four-person household by 2.27.

Based on the Ministry of Health and Welfare's 2024 official notice, this calculation yields 5,962,517 won per month, while the estimated 2025 figure is approximately 6,106,647 won. This article explains how to calculate and verify this figure yourself — the baseline for the Earned Income Tax Credit, youth jeonse loan interest subsidies, and various expanded welfare eligibility criteria.

What Is Median Income: Not the Average, but the Exact Middle

The Legal Standard Announced by the Ministry of Health and Welfare Every March

Median income refers to the income that sits exactly in the middle when all household incomes nationwide are ranked in order. Under Article 3 of the National Basic Living Security Act, the Ministry of Health and Welfare announces it at the end of March each year based on the previous year's household income survey, and the announced amount is applied to welfare administration from late August to around September of that year.

It must be distinguished from average income. Unlike the average, median income is not skewed upward by a small number of high earners, so it more accurately reflects the actual living standards of ordinary people. That is why the government uses median income rather than the average to determine welfare eligibility.

From 30% to 200%: The Backbone of Welfare Programs

The median income ratio forms the backbone of eligibility criteria for most welfare programs. Basic Livelihood Security livelihood and medical benefits apply at 30% of median income, Group 1 medical aid at 42%, housing benefits and long-term care insurance for the elderly at 45–50%, Youth Leap Accounts at 63%, the Earned Income Tax Credit and youth jeonse loan interest subsidies at 100%, and health insurance premium reductions and child allowances at 200%.

In particular, the 100% threshold is the first checkpoint for verifying Earned Income Tax Credit eligibility. Since each program sets its own criteria — such as annual income of 22 million won or less for single households — knowing the 100% median income figure for a one-person household lets you make a rough first estimate of your eligibility.

The Formula: Four-Person Household Amount Divided by 2.27

The Equivalization Principle of the Square-Root Scale

In welfare administration, household amounts are set based on the four-person household standard and then converted according to household size. The coefficient used here is a square-root-based equivalence scale. The four-person amount is divided by 2.27 for a one-person household, by 2.06 for a three-person household, and by 1.81 for a two-person household. These coefficients reflect 'economies of scale' — the more people in a household, the less money each person needs.

Verifying with a Practical Calculation Example

The 2024 official figure for 100% of median income for a four-person household is 13,536,744 won per month. Dividing this by 2.27 gives 5,962,517 won, matching the officially announced single-person household amount. Applying the same formula to 2025 figures yields an estimated increase to approximately 6,106,647 won, though the confirmed figure must be checked in the Ministry's official notice. To convert to an annual figure, simply multiply the monthly amount by 12.

Judging Your Eligibility: Calculating Recognized Income

Recognized Income = Ordinary Income + Converted Asset Value − Deductions

Knowing the standard amount is a separate matter from determining whether you qualify. Welfare benefit applications are assessed using 'recognized income,' calculated by adding the income-converted value of assets to ordinary income and subtracting basic deductions.

The asset income-conversion amount is calculated by subtracting the basic asset deduction (69 million won for general households, 52 million won for housing benefit recipients, etc.) from the asset value, dividing by 12, and then dividing again by the monthly interest rate. Vehicles receive a deduction of up to 16 million won. For example, a one-person household with a monthly salary of 3 million won and 20 million won in savings would have a converted asset value of 0 won, since the savings fall below the basic asset deduction limit, and recognized income of approximately 2.4 million won after income deductions. Dividing this by the single-person median income of about 5.96 million won yields roughly 40%, giving a sense of eligibility for near-poverty-tier programs.

Beware of Confusion: Disposable Income Is an Entirely Different Concept

'Disposable income,' used in debt counseling and similar contexts, is the amount left after subtracting minimum living costs (1.05 million won per month for a single person) from take-home pay after the four major insurance contributions. Someone earning 1.5 million won per month would have a calculated repayable amount of 450,000 won. Since both the calculation method and purpose differ from median income assessments, mixing up the two concepts can lead to wrong eligibility judgments.

Practical Points to Check Before an Eligibility Ruling

Income Scope and Household Grouping

Income assessment does not look at earned income alone. Business income, financial income, and pensions are all included, and savings, real estate, and vehicles are converted into income as well. Moreover, some programs may legally group you with your parents' household even if you live separately, so you also need to check whether your three-month average income exceeds the threshold.

The Earned Income Tax Credit applies the 100% median income threshold on a combined spousal basis, so it should not be compared directly against the single-person household figure. Also note that programs governed by local government ordinances may have different standards by city and province.

Where to Verify Officially and How to Respond

The confirmed figures for the current year can be found in the official notices on the Ministry of Health and Welfare website (mohw.go.kr) and via the welfare service self-diagnosis tool on Bokjiro (bokjiro.go.kr). The self-diagnosis tool automatically calculates results once you enter your income and assets. For counseling, contact the Health and Welfare Call Center at 129; for health insurance reduction inquiries, call the National Health Insurance Service at 1577-1000.

Median income is updated annually to reflect inflation and income growth. Judging this year's eligibility by last year's figures leads to errors. When citing figures from blogs or online communities, always cross-check the reference year, and if your self-diagnosis result differs from the actual benefits decision, contacting your local community service center or the National Tax Service is the surest course. With a single formula and the latest official notice, anyone can calculate their own welfare eligibility directly.