Year-End Tax Settlement in Korea 2026: Complete Guide for Foreign Workers

What Is the Year-End Tax Settlement (연말정산)?

The year-end tax settlement (연말정산) is the process by which a company compares the employment income tax (근로소득세) withheld from an employee's monthly salary against the actual tax owed, and settles the difference. Article 137 of the Income Tax Act (소득세법 제137조) requires the withholding agent (the company) to complete the year-end tax settlement when paying February wages of the following year. If too much tax was withheld, the employee receives a refund; if too little, the employee pays the shortfall.

Note for foreign workers: Your employment contract may specify different arrangements, but the statutory procedure under Article 137 of the Income Tax Act applies as the minimum legal requirement.

Basic Year-End Tax Settlement Process

1. Collect data from the Simplified Service — Download proof of deductible expenses (medical costs, education fees, insurance premiums, credit/debit card spending, etc.) from the NTS Hometax Year-End Tax Settlement Simplified Service (국세청 홈택스 연말정산 간소화 서비스), which opens every year on January 15.
2. Complete the deduction application form — Enter dependent information and deduction items on the income and tax deduction declaration form distributed by your company.
3. Submit documents — For items not retrievable through the Simplified Service (e.g., monthly rent payment certificates, donation receipts), attach the relevant documents separately.
4. Company settlement and notification — The company's payroll officer calculates the tax and reflects the refund or additional payment amount in the February pay statement.

Income Deduction (소득공제) vs. Tax Credit (세액공제): What's the Difference?

• Income deduction (소득공제): Reduces the taxable income itself. Key examples include the personal deduction (인적공제 — basic deduction of KRW 1,500,000 per person), National Pension premium deduction, and credit/debit card spending deductions (Articles 51–52 of the Income Tax Act / 소득세법 제51조~제52조).
• Tax credit (세액공제): Deducted directly from the calculated tax amount. Examples include the employment income tax credit, child tax credit, and medical expense, education expense, and donation tax credits (Articles 59–59-4 of the Income Tax Act / 소득세법 제59조~제59조의4). Because tax credits reduce the tax bill by a fixed amount regardless of income level, they are particularly advantageous for lower-income workers.

Easily Overlooked Deduction Items

• Monthly rent tax credit (월세 세액공제): If you are a non-homeowning household head with a total annual salary of KRW 80,000,000 or less, you can receive a tax credit of 15–17% of your annual rent payments (Article 95-2 of the Restriction of Special Taxation Act / 조세특례제한법 제95조의2). This is not automatically reflected in the Simplified Service, so you must submit your lease agreement and bank transfer records directly.
• Income tax reduction for employees at small and medium-sized enterprises (중소기업 취업자 소득세 감면): Youth, career-interrupted women, persons with disabilities, and others who take up employment at an SME may receive a reduction in employment income tax for a set period (Article 30 of the Restriction of Special Taxation Act / 조세특례제한법 제30조).
• Long-term mortgage interest repayment deduction (장기주택저당차입금 이자 상환액 공제): If you are repaying interest on a home mortgage loan, you may be eligible for an income deduction depending on the applicable requirements (Article 52, Paragraph 5 of the Income Tax Act / 소득세법 제52조 제5항).

Common Reasons for Additional Tax Payment

After the year-end tax settlement, the main reasons you may owe additional tax are: ① you had other income (e.g., side jobs or freelance work) that pushed your combined taxable income into a higher bracket; ② deduction items you claimed in the previous year no longer apply this year; or ③ changes in dependents were not reported.

Reference: Four Major Social Insurance Deductions for 2026

Among the four major social insurances that affect the year-end tax settlement result, the National Pension premium (employee share: 4.75%) and the National Health Insurance premium (employee share: 3.595%) are both fully deductible as income deductions. The 2026 minimum wage monthly equivalent is KRW 2,156,880 (based on a 40-hour week / 209 hours), which can serve as a reference for estimating the deduction scale for minimum-wage workers.

Preparing for Year-End Tax Settlement More Easily

Knowing in advance how much is deducted from your annual salary and how much you actually take home helps you predict your year-end tax settlement result. You can use the Workbear (workbear.kr) take-home pay calculator to check your four major insurance premiums and withheld income tax at a glance. If the deduction items feel complicated, use the AI search feature to look up specific provisions right away.

This article is for informational purposes only and does not constitute legal advice. For specific cases, consult a certified labor attorney (노무사) or lawyer.