Year-End Tax Settlement in Korea: What Every Worker Must Know

What Is Year-End Tax Settlement (연말정산)?

Year-end tax settlement (연말정산) is the procedure by which the difference between the income tax withheld from an employee's salary throughout the year (원천징수세액, withholding tax) and the actual tax owed is either refunded or collected. Article 137 of the Income Tax Act (소득세법 제137조) stipulates that the withholding agent (the employer) must carry out year-end tax settlement when paying the February salary of the year following the relevant tax year.

In simple terms: each month when the employer pays wages, it estimates the likely tax and deducts it in advance. However, the precise tax amount can only be calculated after the year ends — because deductible items such as medical expenses, education expenses, and donations only become clear at year-end. Year-end tax settlement is therefore the process of recalculating in January–February: if you overpaid, you receive a refund; if you underpaid, you pay the difference.

Note: The statutory rules described here apply to all workers in Korea. Your actual deductible amounts may vary depending on your individual circumstances and the documents you submit.

The Relationship Between Withholding Tax (원천징수) and Year-End Tax Settlement

Withholding tax is the system under Article 134 of the Income Tax Act (소득세법 제134조) by which the employer deducts tax from wages at the time of payment and remits it to the government. From the worker's perspective, the amounts listed as "income tax (소득세)" and "local income tax (지방소득세)" on the monthly pay stub are the withheld amounts.

Year-end tax settlement is the final reconciliation of this withholding. If the total withholding for the year exceeds the actual tax → refund; if it falls short → additional payment.

How Are Refunds and Additional Payments Determined?

The actual tax is calculated as: taxable income (과세표준) × tax rate. Taxable income is total salary minus various deductions. The more deductions you have, the lower the taxable income and the lower the tax — increasing the likelihood of a refund.

Key deduction items include:

The more carefully you gather your deduction documents, the larger your potential refund. Conversely, failing to submit documents means missing deductions and potentially owing additional tax.

Key Practical Points Every Worker Must Know

① Year-end tax settlement refunds are treated as equivalent to wages. The Suwon District Court, in its 2008No4285 ruling, found an employer guilty for failing to pay a year-end tax settlement refund. If your company refuses to pay the refund, you may file a complaint with the Ministry of Employment and Labor (고용노동부).

② Mid-year resignees should use the May comprehensive income tax return. Although the employer performs an interim settlement at the time of resignation, deductions such as medical expenses and donations may be omitted. Filing directly through Hometax (홈택스) in May of the following year can result in an additional refund.

③ The dependant deduction is based on actual dependency. Article 50 of the Income Tax Act (소득세법 제50조) recognises as a dependant any family member whose total annual income does not exceed 1,000,000 won (or, if they have employment income only, whose total salary does not exceed 5,000,000 won). False deduction claims are subject to penalty surcharges (가산세).

④ Do not rely 100% on the simplified filing service. Some items are not automatically uploaded to the National Tax Service Hometax (국세청 홈택스) year-end tax settlement simplified service — for example, eyeglass purchase costs, school uniforms for middle and high school students, and private tutoring fees for pre-school children. You must collect receipts for these yourself.

Calculate Your Take-Home Pay in Advance

If you want to see how year-end tax settlement affects your monthly take-home pay, try the Annual Salary Take-Home Pay Calculator at workbear.kr. It instantly shows your monthly net pay after reflecting the four major social insurance contributions and income tax. If you suspect your rights have been violated — for example, if your refund has been withheld — you can also use the AI labor law search feature to find relevant statutes and how to respond.

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

Frequently Asked Questions

When does year-end tax settlement take place?

Every year in January–February, the employer settles the previous year's employment income tax. Workers submit their deduction documents to the company, and the company reflects any refund or additional payment in the February payroll.

What happens if the company does not pay the year-end tax settlement refund?

A year-end tax settlement refund is treated as equivalent to wages. The Suwon District Court, in its 2008No4285 ruling, found an employer guilty for failing to pay a year-end tax settlement refund. If the company refuses to pay, you may file a complaint with the Ministry of Employment and Labor.

Does a mid-year resignation require year-end tax settlement?

When an employee resigns mid-year, the company performs an interim settlement at the time of departure. However, certain deduction items may not be fully reflected, so filing directly during the comprehensive income tax return period in May of the following year can result in an additional refund.

What is the difference between year-end tax settlement and the comprehensive income tax return?

Year-end tax settlement is the procedure by which salaried workers with employment income only settle their taxes through their employer. The comprehensive income tax return is the procedure for workers who have income other than employment income — such as business income or rental income — or for mid-year resignees who file directly with the tax office.