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

What Is an Income Deduction in Year-End Tax Settlement?

Every January and February, year-end tax settlement (연말정산) becomes the biggest concern for salaried workers in Korea. At its core is the income deduction (소득공제). An income deduction is a system that subtracts a certain amount from a worker's total wages to lower the tax base, and it is governed throughout the Income Tax Act (소득세법). Lowering the tax base can push income into a lower tax bracket, thereby reducing the actual tax burden.

Note for foreign workers: The statutory deduction rules described below represent the legal minimum/standard. Your actual situation may differ depending on your visa status, residency period, and employment contract terms.

This article does not cite specific court rulings. It organizes the key deduction items by statutory provision for immediate practical use.

1. Earned Income Deduction — Applied Automatically

Article 47 of the Income Tax Act (소득세법 제47조) provides that a fixed percentage is automatically deducted based on total wage amount. The lower the total wages, the higher the deduction rate; the upper limit is KRW 20,000,000. Your employer applies this automatically without any separate application, but understanding the deduction structure helps you grasp your overall tax burden.

2. Personal Deduction — Essential If You Have Dependents

Under Article 50 of the Income Tax Act (소득세법 제50조, Basic Deduction), KRW 1,500,000 per year is deducted for the taxpayer, spouse, and each dependent. The requirements for dependents are: ① sharing the same livelihood; ② total annual income not exceeding KRW 1,000,000 (or total wages of KRW 5,000,000 if only earned income); and ③ satisfying the age requirement (lineal ascendants aged 60 or older, lineal descendants or siblings aged 20 or younger, etc.).

Article 51 of the Income Tax Act (소득세법 제51조, Additional Deduction) further recognizes deductions for the elderly (KRW 1,000,000 per person aged 70 or older), persons with disabilities (KRW 2,000,000 per person), and female-head-of-household or single-parent deductions. If your family composition has changed, be sure to re-verify eligibility every year.

3. Special Income Deduction — Social Insurance Premiums and Housing

Article 52 of the Income Tax Act (소득세법 제52조) allows the full amount of social insurance premiums borne by the worker — including health insurance and employment insurance premiums — to be deducted. As of 2026, the employee's share of the health insurance premium rate is 3.595%, and the employment insurance unemployment benefit rate is 0.9%; both amounts are fully deductible.

For housing-related deductions, under Article 87 of the Restriction of Special Taxation Act (조세특례제한법 제87조) and related provisions, the principal and interest repayments on housing lease loans (deduction rate 40%, ceiling KRW 4,000,000) and interest repayments on long-term mortgage loans (ceiling up to KRW 20,000,000) are deductible. Requirements such as being a householder without a home and housing size limits are strict, so check carefully.

4. Other Income Deductions — Credit Cards, Personal Pension, and More

Under Article 126-2 of the Restriction of Special Taxation Act (조세특례제한법 제126조의2), the credit card and similar income deduction applies different rates to spending exceeding 25% of total wages: 15% for credit cards; 30% for debit/check cards and cash receipts; and 40–80% for spending at traditional markets and on public transportation. Increasing the proportion of debit/check card and cash receipt use raises the deduction benefit.

The personal pension savings deduction under Article 51-3 of the Income Tax Act (소득세법 제51조의3) and the small-enterprise and self-employed mutual-aid contribution (Yellow Umbrella Mutual Aid / 노란우산공제) deduction under Article 86-2 of the Restriction of Special Taxation Act (조세특례제한법 제86조의2) are also items that are easy to overlook.

Practical Checklist

• Some items are not automatically collected through the simplified tax data service. Eyeglass purchase costs, school uniforms for middle and high school students, and private institute fees for pre-school children must be gathered by collecting receipts yourself.
• Re-verify each year whether dependents exceed the income threshold. If a dependent has earned income from part-time work or other sources, they may no longer qualify for the deduction.
• Supporting documents for deductions must in principle be retained for 5 years (Article 85-3 of the Framework Act on National Taxes / 국세기본법 제85조의3).

If you want to know how much you actually take home after deducting social insurance premiums and taxes from your annual salary, try the salary take-home calculator at Workbear (workbear.kr). It reflects the latest 2026 insurance rates and tax rates so you can instantly check your monthly net pay. It is also useful for estimating your expected year-end tax refund in advance.

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