The National Health Insurance Service (NHIS) announced the results of the 2026 April settlement of workplace subscriber health insurance premiums. Among all people checked, 10.35 million had to pay more premium. The average extra payment per person was 218,574 KRW. On the other hand, 3.53 million people will get back an average of 123,416 KRW. The remaining 2.89 million people have no change in settlement. This settlement is the result of recalculating based on the actual pay received in 2025. People who had a promotion, wage increase, or bonus payment will pay more this month for the premium they paid too little last year. People with a large extra payment can divide the payment through their workplace. The main point of the article is why premiums cannot be charged right away to match income changes. The NHIS explained that workers' premiums are already charged monthly. But because the same debate repeats every April, calls for real-time charging and system improvement are growing again.
원문 보기Why the April health insurance premium suddenly goes up: actually, it is a late process to match last year's income
Many people look at the April payslip and feel 'the health insurance premium suddenly went up.' But to say it exactly, it is not that the premium rate suddenly increased. It is that the settlement to match the gap between last year's actual income and the premium already paid is reflected all at once.
Workplace subscriber health insurance premiums are first collected every month based on salary. But if there was a promotion or pay step increase during the year, or if a big amount came in at once like an incentive or bonus, that change may not be reflected right away. Then in the next spring, the company reports the total pay from the previous year, and the NHIS recalculates with that real amount and adds the difference or gives it back.
In this article, the number saying 10.35 million people will pay an average of 218,574 KRW more is exactly that difference. If you understand this structure, you get the answer to the question, 'Why does everyone call it a bomb every April?' April is closer to a month when the changes from the past year are sorted out, not a month when a new burden begins.
The extra payment in April is usually not a 'premium increase' but a 'settlement of the previous year's income difference.'
The more likely a person had a promotion, wage increase, or bonus, the more likely an extra payment will happen.
Why is the money paid every month recalculated again a year later? — 4 steps of settlement
If you understand just this flow, the April settlement news will feel much less unfamiliar.
Step 1: The health insurance premium is first taken from the monthly salary
The company withholds the health insurance premium based on the reported monthly standard pay amount (the standard monthly salary used to calculate the premium each month). Workers pay the premium at this point, but this amount may not be the final confirmed amount for that year.
Step 2: Salary and bonuses change during the year
If there are changes like promotion, wage increase, bonus, incentive, or leave, the actual yearly income can become different from the standard first reported. This gap is what later becomes the basis for settlement.
Step 3: The company reports the previous year's total pay amount
At the beginning of the next year, the workplace tells the NHIS the worker's total pay amount (the full pay received during 1 year) actually received in the previous year. In the past, submitting the total pay amount notice was the key, and recently the link with National Tax Service data has been strengthened.
Step 4: In April, you pay more or get a refund for the difference
The NHIS recalculates the premium using the reported actual total pay amount. If the money already paid was not enough, more is taken from the April salary. If too much was paid, it is refunded. That is why the April payslip stands out so much.
Why do some people pay more and some get money back — the standard that decides extra payment and refund
The settlement result depends more on how much last year's actual income changed from the first standard than on whether it is 'good or bad.'
| Category | Cases where extra payment often happens | Cases where refund or reduction often happens |
|---|---|---|
| Income change | Promotion, salary step increase, wage increase, bonus payment | Leave of absence, wage decrease, fewer working days |
| Main reason | Because the actual total pay was bigger than the standard used during the year | Because the actual total pay was smaller than the standard used during the year |
| Why it feels bigger | Long-Term Care Insurance premium also goes up together because it is linked to the 건강보험 premium | The 건강보험 premium and Long-Term Care Insurance premium both go down or are refunded |
| Extra check points | Whether income outside salary was included, whether the pay change report was missed | Whether status changes like leave, resignation, or workplace change were reflected |
The 건강보험 premium may look like tax, but the calculation method is quite different
To understand the debate about real-time charging, you need to first separate what is the same and what is different between the 건강보험 premium and tax.
| Item | 건강보험 premium | |
|---|---|---|
| Legal nature | It is a social insurance premium. It strongly has the nature of insurance funds for medical coverage. | |
Tax It is a tax. It is a general burden for national finance. | ||
| How income is reflected | It is reflected regularly based on confirmed income data and workplace reports. | |
| Real-time nature | Salary is reflected relatively quickly, but overall, it mixes a structure of later adjustment and settlement. | |
| Reference data | It uses National Tax Service income data, but the insurance premium charging standard is not completely the same as taxable income. | |
| Why this comparison matters | It shows that just because it looks like a tax, it does not mean fully real-time calculation is possible. | |
Why it cannot be collected right away in real time — the issue is not the computer system, but 'confirmed income'
If you only read the article, you may think, 'With today's technology, if salary changes, should not the insurance premium also change right away?' But the key point of the system is not just computer speed. It is about which income should be seen as confirmed income, and when.
Wages paid every month, like salary, can be identified relatively quickly. But it becomes different when performance pay, bonuses, side-job income, income outside salary, qualification changes, and company reporting timing are involved together. Unlike taxes, Korean National Health Insurance also moves together with things like the Workplace subscriber and Resident subscriber system, Long-Term Care Insurance linkage, and the standard for Dependent under NHI (pibuyangja), so it is not a structure that ends just by making a 'real-time calculator'.
If you know this, you can tell whether this debate is a 'problem caused by an old computer system' or a 'problem caused by the time gap between confirmed income and administrative procedures'. The current system is closer to a compromise model that charges first where possible and settles later, rather than fully reflecting everything in real time.
The core issue is not 'lack of technology' but 'a structure where confirmed income is recorded late'.
So discussions about improving the system should look not only at 'immediate charging' but also at reporting methods, data linkage, and adjusting the settlement timing together.
How far do NHIS, companies, and the National Tax Service each handle?
When checking responsibility, you should separate 'who makes the final charge' and 'who creates and sends the data'.
| Entity | Main role | |
|---|---|---|
| National Health Insurance Service (NHIS) | It charges and collects insurance premiums and confirms the settlement results. | |
Point readers should understand The corporation is the final calculation body, but much of the input data depends on outside reporting. | ||
| Company HR and payroll staff | They report the monthly remuneration amount and the total remuneration from the previous year, and withhold and pay the insurance premium from salary. | |
| National Tax Service | It holds earned income data, and recently it also links things like simplified payment statements with NHIS. | |
The April settlement did not appear overnight — the long process of how Korean National Health Insurance was formed
To understand the current system, you first need to see why workplace subscribers and resident subscribers started in different ways.
1977: It started with workplace medical insurance
Korean medical insurance first applied to workers at workplaces with 500 or more employees. Because the system started with a group whose wage income was easy to check, the starting point of health insurance itself was 'workplace-centered'.
Late 1980s: Regional medical insurance expanded
As insurance coverage expanded to rural and urban areas, nationwide medical insurance was completed. But workplace and regional plans were not combined in the same way, so the dual structure of premium calculation standards became fixed from this time.
2000: Integrated health insurance started, but the April settlement kept the old operating method
The system was integrated when the National Health Insurance Service (NHIS) was launched. But according to the government explanation, the operation of settling changes in workplace subscribers' pay all at once in April of the next year is described as a method that has continued since 2000. So the current April debate is more accurately seen not as a new system created after integrated health insurance, but as an extension of an operating practice that has been kept since around that time.
2018·2022: It slowly moved toward an income-centered contribution system
As debate about fairness between workplace and regional subscribers continued, reform moved forward to change the premium calculation standard to be more 'income-centered'. But the April settlement itself did not disappear, so the time-gap problem still remains.
If the health insurance fee suddenly jumped on your pay slip, check in this order
This is not just a simple complaint guide. It is a checking order to decide whether 'this increase is a settlement or another reason'.
Step 1: Look at the health insurance fee and Long-Term Care Insurance fee separately on the pay slip
Many people think only the health insurance fee went up, but in reality the Long-Term Care Insurance fee often rises too, so the total looks much bigger. The starting point is to separate these two items first.
Step 2: Compare with the previous month and check when and how much it increased
If it suddenly increased only this month, there is a high chance it is the April settlement. If it changed from a few months ago, it could be a pay change report or a qualification change. Looking at the timing helps narrow down the cause.
Step 3: Ask your company for your personal 4 major insurance notice details and reporting standard
Information that workers cannot easily check directly is in the company's records. If you check reason codes like whether it is an additional Year-end tax settlement, a pay change, or delayed enrollment, a lot of misunderstanding can be reduced.
Step 4: Check NHIS records and whether installment payment is possible together
If the additional settlement premium is much larger than this month's premium, you can apply for installment payment through the workplace. You need to check both whether the amount is correct and whether you can pay in parts, so you can respond in a real way.
So this news is not really an article about 'health insurance fee increases' but an article showing the limits of the settlement structure
The most important thing when reading this news is to distinguish between 'insurance fees became newly more expensive in April' and 'last year's income difference was settled now'. If you miss this difference, the cause of the problem can all look mixed together, whether it is a premium rate change, a reporting time gap, or system design.
Looking a little more broadly, this debate also means that Korean National Health Insurance started as workplace-centered, expanded to regional coverage, and went through integration and income-centered reform, but still carries the old task of 'when to reflect confirmed income'. In other words, this is not just a simple April event, but a moment that shows the structural features of the health insurance contribution system.
So when you see similar articles in the future, you can read them like this. First, distinguish whether it is a premium rate increase or a settlement; second, check who reflected which data late; third, see whether the system improvement discussion talks only about real-time contribution charging or touches the whole structure of reporting, connection, and settlement. If you understand this much, the next health insurance fee news will be much clearer to read.
This issue is closer to 'is a settlement structure that reflects income late appropriate' than to 'health insurance fees went up'.
It is more accurate to see the debate about charging right away as a question of how to change the timing gap in data confirmation and the administrative design, rather than the insurance premium rate.
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