Social Insurance Calculator — Auto-Calculate Employee & Employer Contributions from Monthly Salary

Calculating social insurance contributions is one of the most frequent payroll tasks — and one of the most error-prone, given annually changing rates and varying caps per insurance type. This calculator takes a single monthly salary input and instantly computes all four insurance contributions at the latest 2026 rates.

Key Features

🏦 All Four Insurances Calculated

• National Pension: Standard monthly income caps applied, 4.5% each for employee and employer
• Health Insurance: Remuneration-based, long-term care calculated separately
• Employment Insurance: Unemployment + employment stability/skills development split
• Industrial Accident Insurance: Industry-average rate (employer only)

📊 Clear Results

• Separate employee and employer totals
• Estimated take-home pay (including simplified income tax)
• Employer total labor cost (salary + employer-side contributions)

⚙️ Detailed Options

• Tax-exempt items (meal, transport) entered separately
• Part-time worker mode (under 15 hours/week)
• Industry-specific accident insurance rate selection

How to Use

Step 1: Enter Monthly Salary

Input gross monthly salary. Enter tax-exempt items separately if applicable.

Step 2: Set Options

Configure weekly hours, industry type, and other applicable options.

Step 3: View Results

Per-insurance breakdowns, employee/employer totals, and estimated take-home pay display automatically.

Tips

Preview Take-Home Pay Before Salary Negotiations

Knowing the after-deduction amount helps set realistic expectations during salary discussions.

Include Employer Contributions in Hiring Budgets

Factor in the employer’s insurance burden (approximately 10–12% of salary) when planning headcount budgets.

Best Practices

Separate Tax-Exempt Allowances Before Calculating

Meal allowances (up to 200,000 KRW/month) and transport subsidies are excluded from social insurance premiums. Enter these in the tax-exempt field rather than lumping them into gross salary. Failing to separate them inflates both employee deductions and employer contributions unnecessarily, which compounds into significant overpayment across a full year for even a small team.

Verify National Pension Income Brackets Each January

The National Pension caps the standard monthly income at a ceiling that changes annually (5.9 million KRW for 2026). If an employee’s salary exceeds this cap, their pension contribution stops increasing — but health insurance has no such cap. Always confirm the current year’s bracket boundaries before running year-start payroll to avoid under- or over-deducting in January and February.

Run Simulations Before Offering Salary Packages

When extending an offer or negotiating a raise, run the calculator at several salary levels to show candidates their actual take-home pay. A 500,000 KRW gross salary increase does not translate to 500,000 KRW more in pocket — the marginal increase after insurance and tax is closer to 350,000–380,000 KRW. Presenting this transparently builds trust with new hires.

Double-Check Part-Time Worker Exemptions

Employees working fewer than 15 hours per week or fewer than 60 hours per month are exempt from National Pension and Health Insurance. However, Employment Insurance still applies. Toggle the part-time mode in the calculator and confirm each insurance line individually rather than assuming a blanket exemption.

FAQ

Are rates updated annually?

Yes, rates are updated every January. Currently applied rates reflect 2026 standards.

Can daily workers be calculated?

Daily workers have special insurance rules. Use the dedicated daily-worker mode for accurate calculations.

What happens when an employee is on unpaid leave?

During unpaid leave, National Pension and Health Insurance contributions can be suspended by filing an exemption report with each agency. Employment Insurance premiums are not charged for months with zero remuneration. The calculator does not model mid-month leave splits, so for partial months you should prorate the salary manually before entering it.

How do I handle mid-year salary changes?

Enter the new monthly salary effective from the change date. Note that National Pension uses the previous year’s reported income until the July annual reassessment, so actual pension deductions may not change immediately even if salary does. Health Insurance adjusts at the year-end settlement. The calculator shows what premiums would be at the entered salary — use it as a reference for budgeting rather than as the exact payroll figure during transitional months.