Are You a Tax Resident of Korea?
Your tax obligations in Korea depend first on whether you are a tax resident or non-resident. Korea uses a 183-day rule:
- Tax resident: You have lived in Korea for 183 days or more in a calendar year, OR you have a domicile or place of abode in Korea
- Non-resident: Fewer than 183 days in Korea in the calendar year
Most long-term visa holders (E-7, F-series, D-2) on stays of 6+ months are tax residents. Short-term visitors, C-3 holders, and some early-stage digital nomad (F-1-D) residents may be non-residents for part of their time in Korea.
Tax Rates for Residents
Korea uses a progressive income tax system. For tax year 2025:
| Taxable Income (KRW) | Tax Rate |
|---|---|
| Up to ₩14 million | 6% |
| ₩14M – ₩50M | 15% |
| ₩50M – ₩88M | 24% |
| ₩88M – ₩150M | 35% |
| ₩150M – ₩300M | 38% |
| ₩300M – ₩500M | 40% |
| ₩500M – ₩1 billion | 42% |
| Over ₩1 billion | 45% |
Local income tax (지방소득세) adds an additional 10% of your national income tax — so effective rates are 6.6%, 16.5%, 26.4%, etc.
The Flat-Rate Option for Foreign Employees (19%)
Foreign workers employed in Korea have a special option: instead of the progressive rates above, you can elect to pay a flat 19% tax rate (20.9% including local tax) on all employment income. This is advantageous if your income falls in the 24%+ bracket — roughly if you earn more than ₩50 million (~$37,500) per year.
The flat rate applies for the first 20 years of Korean employment (changed from 5 years in 2023). To elect the flat rate, check the box on your year-end tax settlement form (연말정산) or on your annual tax return. Consult a Korean tax accountant to determine whether the flat rate is better for your specific income and deductions.
Tax on Foreign-Source Income
Korea taxes residents on worldwide income — including salary from a foreign employer, freelance income from non-Korean clients, dividends from overseas investments, and rental income from property abroad.
Key implications:
- F-1-D (Digital Nomad) holders: If you are a tax resident (183+ days), your foreign salary is taxable in Korea. Korea has tax treaties with many countries that prevent double taxation, but you must file a Korean tax return and report foreign income.
- E-7 holders with foreign-source side income: Dividends, rental income, and freelance income from non-Korean sources must be reported if you are a resident.
- New residents (first year): If you arrived mid-year and have fewer than 183 days in Korea, you may be a non-resident for that year — taxed only on Korean-source income.
Year-End Tax Settlement (연말정산)
If you are an employed worker in Korea, your employer handles monthly withholding tax, and then conducts a year-end tax settlement (연말정산) in January–February of the following year. This is the Korean equivalent of a tax return for employed individuals — your employer calculates your final tax liability for the previous year, applies your deductions (insurance premiums, medical expenses, charitable donations, education costs), and either refunds overpaid tax or collects the shortfall.
You provide your deduction documentation to your HR department, typically by December 31 of the tax year. Most foreign employees find this process significantly simpler than filing their own return.
Deductions Available to Foreign Workers
Foreign employees can claim many of the same deductions as Korean nationals:
- National Health Insurance premiums (건강보험료)
- National Pension contributions (국민연금)
- Private insurance premiums (up to ₩1 million/year)
- Medical expenses (above 3% of total income)
- Education expenses for dependent children
- Charitable donations to registered Korean organizations
Foreign workers who have home-country pension contributions that conflict with Korean National Pension may be eligible for an exemption under bilateral Social Security Agreements — Korea has agreements with the US, Canada, Australia, Germany, and several other countries.
Tax Treaties: Avoiding Double Taxation
Korea has income tax treaties with over 90 countries. These treaties determine which country has primary taxing rights and provide credits for taxes paid in the other country. For most employed foreign workers in Korea, the practical effect is that you pay Korean tax on your Korea-source income and receive a credit against home-country taxes.
The US is a notable exception: the US taxes its citizens on worldwide income regardless of residency. US citizens in Korea typically need to file both Korean and US returns — though the Foreign Earned Income Exclusion (FEIE) and Foreign Tax Credit prevent most double taxation in practice. Consult a tax professional with both Korean and US expertise if you're a US citizen.
Filing a Tax Return (May 1–31)
If you have income beyond employment (self-employment, rental, investment) or your employer did not conduct year-end settlement, you file a comprehensive income tax return (종합소득세 신고) with the National Tax Service (NTS) every year in May for the previous year's income. File online at hometax.go.kr (available in English) or visit your local tax office.
Source: Korea National Tax Service (nts.go.kr), Income Tax Act | Last verified: March 2026
This article provides a general overview only. Tax situations are highly individual. Consult a Korean Certified Public Accountant (CPA/공인회계사) or tax specialist for advice specific to your income and visa status.