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2026 NHIS Premium Settlement Calculator

Worried about your April paycheck? Enter your 2025 income to estimate your Health Insurance adjustment.

KRW

* Total income including bonuses.

KRW

* Base salary for current monthly deductions.

Awaiting Input

Enter your income details on the left to estimate
your health insurance adjustment for April.

Why the NHIS Premium Settlement in April?

Every April, NHIS recalculates premiums based on your actual income from the previous year. If your 2025 earnings (including bonuses) were higher than the estimate used for monthly deductions, you pay the difference in April.

This is often called the "April Health Insurance Bomb" if the payout is significant, but it's simply a true-up mechanism.

  • Reflects Salary Increases
  • Includes Bonuses & Allowances
  • Adjusts for Job Changes

Eligibility

Active workplace-insured employees as of Dec 31st.

Timing

Adjustment reflected in April salary payment.

Help

Large amounts split into 10 months automatically.