South Korea’s National Health Insurance Service (NHIS) has announced a significant development that will affect millions of workers across the country. On April 22, 2026, the NHIS revealed that more than 10 million employed subscribers whose wages increased in 2025 will face higher health insurance premiums—on average, about 220,000 KRW (roughly $160 USD) more per person. This news comes as the agency prepares to reflect these changes in the April 2026 insurance premium bills, a move that has prompted both concern and curiosity among employees and employers alike.
According to data released by the NHIS and reported by Yonhap News, the total settlement amount for this year’s health insurance premium adjustment stands at a staggering 3.7064 trillion KRW. That’s an increase of about 10% compared to the previous year’s 3.3687 trillion KRW. The jump in total premiums reflects a broader trend of rising wages and seniority increments for South Korean workers, which, while positive for take-home pay, also triggers higher contributions to the national health insurance system.
To understand the scope of this change, let’s break down the numbers. Out of 16.71 million employed subscribers, 2.81 million saw no change in their wages compared to the previous year, meaning their premiums will remain steady. However, 3.55 million workers experienced a decrease in wages and will receive an average refund of 115,000 KRW. The largest group—10.35 million workers—had their wages increased, and as a result, they’ll be required to pay an average of 219,000 KRW more in health insurance premiums for the year. These figures, confirmed by both Yonhap News and BBS News, highlight the direct link between annual wage adjustments and the health insurance system’s year-end settlement process.
This annual settlement, or “year-end adjustment,” is a mechanism designed to ensure that health insurance premiums accurately reflect the actual wages and seniority increments received by employees during the previous year. As explained by NHIS Collection Executive Director Won In-myeong, “The year-end settlement is a system that imposes accurate insurance premiums based on the wages workers received from their workplaces in the previous year.” He further noted, “If workplaces promptly report changes in monthly wage amounts due to salary increases or seniority increments, the additional payment burden from the year-end settlement can be greatly reduced.”
For many, the process may feel a bit like tax season: a time when the numbers are crunched, and the result can be either a pleasant refund or an unexpected bill. The NHIS has taken steps to streamline this process and minimize inconvenience. This year, for the first time, the agency is automatically processing the year-end adjustment for all workplaces using simplified payroll data from the National Tax Service. This automation, as reported by BBS News, is intended to reduce errors and administrative burdens for both companies and the NHIS itself.
The settlement premiums will be reflected in the April 2026 insurance premium and are typically paid in a lump sum. However, recognizing that a sudden additional payment can be a heavy burden, the NHIS allows workplaces to apply for installment payments—up to 12 installments—until May 11, 2026. There’s a catch, though: only those whose additional premium exceeds their regular monthly premium can apply for installments. For businesses using automatic payment systems, the application must be submitted at least two banking days before the payment deadline. These details, confirmed by Yonhap News, are part of the NHIS’s effort to offer flexibility and support to both employers and employees during the adjustment period.
Why is this happening now? The answer lies in the way South Korea’s health insurance system is structured. Premiums are initially calculated based on reported wages, but since salaries and seniority increments can change throughout the year, the NHIS conducts an annual review to reconcile the difference between what was paid and what should have been paid. If a worker’s salary goes up, so does their health insurance premium; if it goes down, they’re due a refund. This system ensures fairness and sustainability, but it also means that wage increases can come with hidden costs.
The broader context here is South Korea’s ongoing effort to maintain a robust and equitable national health insurance system. With an aging population and rising healthcare costs, the NHIS has faced mounting pressure to secure sufficient funding. The year-end settlement process, while sometimes unpopular, is a crucial part of keeping the system afloat. According to NHIS officials, the nearly 10% increase in total settlement premiums this year reflects both higher wages and the agency’s commitment to accurately tracking and collecting contributions.
For employees and employers, the key takeaway is the importance of timely and accurate wage reporting. As NHIS Collection Executive Director Won In-myeong emphasized, “If workplaces promptly report changes in monthly wage amounts due to salary increases or seniority increments, the additional payment burden from the year-end settlement can be greatly reduced.” This practical advice is especially relevant for businesses with complex payroll structures or frequent salary adjustments. The NHIS has also encouraged workers to check their insurance statements carefully and reach out with questions or concerns, underscoring the agency’s focus on transparency and public service.
Of course, not everyone is thrilled about the prospect of higher premiums. Some workers, especially those on tight budgets, may find the additional payment challenging. Others may question the fairness of the system, particularly if they feel their wage increases are being offset by higher deductions. Nevertheless, the NHIS maintains that the year-end adjustment is “a system that imposes accurate insurance premiums based on the wages workers received from their workplaces in the previous year,” as stated by Won In-myeong. The agency’s hope is that by automating the process and offering installment options, the burden will be manageable for most.
Looking ahead, the NHIS is likely to continue refining its processes and seeking ways to balance the need for adequate funding with the realities faced by workers and businesses. For now, the message is clear: wage increases are a sign of economic progress, but they come with responsibilities—including a fair share toward the national health insurance system. As the April 2026 premium bills go out, millions of South Koreans will see firsthand how last year’s pay raises translate into this year’s insurance contributions. Whether that’s a cause for celebration or consternation may depend on which side of the wage adjustment you’re on.
One thing is certain: for South Korea’s employed subscribers, the annual health insurance settlement is now a fixture of working life—one that rewards attention to detail, timely reporting, and a bit of financial planning.