📋 Sources: National Tax Service (NTS / 국세청) 2026, PwC Korea Tax Summaries 2026, Ministry of Economy and Finance income tax bracket schedule
If you work in Korea, you pay Korean income tax. And every January–February, Korean employers run 연말정산 (yeon-mal-jeong-san) — the year-end tax settlement that determines whether you get a refund or owe more. As a foreign worker, you also have access to a special flat tax rate that Korean nationals can’t use. Understanding both systems helps you pay the right amount — and no more.
📑 In this guide
- Who Pays Korean Income Tax
- The Progressive Tax Brackets (2026)
- The 19% Foreigner Flat Tax Rate
- Flat Rate vs Progressive: Which Is Better for You
- What 연말정산 (Year-End Settlement) Actually Is
- Year-End Tax Calendar
- Key Deductions and Credits for Foreigners
- How to Complete 연말정산
- Tax When Leaving Korea
- Common Questions
💡 Two things foreigners need to understand immediately
First: Korean income tax is withheld from your paycheck monthly — you’re already paying it. The year-end settlement is a reconciliation, not a new bill. Second: as a foreign worker, you can elect a flat 19% tax rate (20.9% including local surtax) instead of the progressive brackets — sometimes this saves significant money, sometimes it doesn’t. Calculating which is better for your specific situation is the most important tax decision you’ll make as a foreign worker in Korea.
1. Who Pays Korean Income Tax
| Category | Tax obligation |
|---|---|
| Tax resident (183+ days in Korea in a calendar year) | Worldwide income is taxable in Korea — including salary from Korean employer AND any overseas income, investments, or rental income |
| Non-resident (under 183 days in Korea in the calendar year) | Only Korea-source income is taxable — typically just your Korean salary |
| E-7, E-2, E-9 employed workers | Tax withheld automatically by employer. 연말정산 handled by employer in January–February. |
| F-1-D Digital Nomad (183+ days in Korea) | Likely a Korean tax resident — worldwide income potentially taxable. Seek professional advice. Tax treaty with your home country may limit Korean taxing rights. |
📌 The 183-day rule applies to the calendar year — not your visa start date
A foreigner who arrives in Korea on July 1 and stays through December 31 has been in Korea for 184 days in that calendar year — making them a Korean tax resident for that year and potentially liable for worldwide income tax. This catches many new arrivals off guard.
2. The Progressive Tax Brackets (2026)
📋 Source: Ministry of Economy and Finance, effective from 2023 tax year (brackets adjusted for income tax reform)
Korea uses a progressive income tax system. The rate below applies to each bracket of taxable income — not the entire income.
Up to KRW 14,000,0006%+ 10% local surtax
KRW 14,000,001 – 50,000,00015%+ 10% local surtax
KRW 50,000,001 – 88,000,00024%Most E-7 range
KRW 88,000,001 – 150,000,00035%+ 10% local surtax
KRW 150,000,001 – 300,000,00038%+ 10% local surtax
KRW 300,000,001 – 500,000,00040%+ 10% local surtax
KRW 500,000,001 – 1,000,000,00042%+ 10% local surtax
Over KRW 1,000,000,00045%+ 10% local surtax
Local income surtax (지방소득세): An additional 10% is applied on top of the national income tax in every bracket — so the effective rates are 6.6%, 16.5%, 26.4%, 38.5%, 41.8%, 44%, 46.2%, and 49.5% respectively.
💡 How progressive tax works in practice — example
Annual taxable income: KRW 60,000,000
First KRW 14,000,000 × 6% = KRW 840,000
Next KRW 36,000,000 × 15% = KRW 5,400,000
Remaining KRW 10,000,000 × 24% = KRW 2,400,000
Total national tax: KRW 8,640,000
Plus 10% local surtax: KRW 864,000
Total tax: KRW 9,504,000 (15.84% effective rate)
First KRW 14,000,000 × 6% = KRW 840,000
Next KRW 36,000,000 × 15% = KRW 5,400,000
Remaining KRW 10,000,000 × 24% = KRW 2,400,000
Total national tax: KRW 8,640,000
Plus 10% local surtax: KRW 864,000
Total tax: KRW 9,504,000 (15.84% effective rate)
3. The 19% Foreigner Flat Tax Rate
📋 Source: Income Tax Act Article 18-2 (소득세법 제18조의2), PwC Korea Tax Summaries 2026
| Item | Details |
|---|---|
| Rate | 19% flat rate on gross employment income + 10% local surtax = 20.9% total effective rate |
| Who can use it | Foreign employees (not Korean nationals) who started working in Korea. Available for employment income only — not business income or investment income. |
| Eligibility deadline | Must have started employment in Korea by December 31, 2026 to qualify. This sunset provision was most recently extended to end-2026 — watch for further extension announcements. |
| Duration | Available for up to 20 years from the date you first started working in Korea |
| Deductions | ❌ No deductions or tax credits permitted when using the flat rate. No employment income deduction, no personal exemption, no dependent deduction, no card spending deduction. |
| How to elect | Submit a flat rate election form (단일세율 적용신청서) through your employer’s HR department during 연말정산. You can switch between the progressive and flat rate systems each year. |
| Can I change my mind year to year? | ✅ Yes — you can elect the flat rate for some years and the progressive rate for other years. The optimal choice can change as your income and life circumstances change. |
4. Flat Rate vs Progressive: Which Is Better for You
Progressive Rate (Standard)
- 6%–45% depending on income bracket
- Employment income deduction (근로소득공제) reduces taxable base
- Personal exemption (기본공제): KRW 1,500,000 per person
- National pension, health insurance contributions are deductible
- Card spending deduction (신용카드 공제)
- Medical expenses, education costs deductible
- Housing rental deduction available
Best for: Lower to middle income (KRW 30M–80M) with dependents and significant Korean deductible expenses
Flat Rate (19% + Local Surtax)
- Fixed 19% on all employment income
- Total with local surtax: 20.9%
- No deductions of any kind
- Simple calculation
- No need to gather deduction receipts
- Consistent year-to-year
- Must elect by December 31 of the tax year
Best for: High earners (KRW 90M+) without significant Korean deductible expenses, or those with complex overseas income situations
Side-by-side calculation examples
| Annual salary | Progressive rate (est.) | Flat rate (19% + local) | Better choice |
|---|---|---|---|
| KRW 35,000,000 | ≈ KRW 900,000–1,500,000 (after standard deductions) | ≈ KRW 7,315,000 | ✅ Progressive — by a wide margin |
| KRW 50,000,000 | ≈ KRW 3,500,000–5,000,000 (after deductions) | ≈ KRW 10,450,000 | ✅ Progressive — significantly better |
| KRW 70,000,000 | ≈ KRW 7,500,000–9,000,000 (after deductions) | ≈ KRW 14,630,000 | ✅ Progressive — still better for most |
| KRW 90,000,000 | ≈ KRW 14,000,000–16,000,000 (after deductions) | ≈ KRW 18,810,000 | ⚠️ Depends heavily on deductions available |
| KRW 120,000,000 | ≈ KRW 24,000,000–28,000,000 (without major deductions) | ≈ KRW 25,080,000 | ✅ Flat rate — increasingly attractive |
| KRW 150,000,000+ | ≈ KRW 38,000,000+ (35%+ bracket kicks in) | ≈ KRW 31,350,000 | ✅ Flat rate — clear winner |
⚠️ Critical: Calculate both options BEFORE 연말정산 in January
The crossover point where the flat rate becomes better than the progressive rate varies by your specific deductions. Many foreigners earning KRW 80–100M are better off with the progressive rate due to pension, health insurance, and card spending deductions. The only way to know for certain is to calculate both. Use the NTS 홈택스 (Hometax) calculator or consult a Korean 세무사.
5. What 연말정산 (Year-End Settlement) Actually Is
연말정산 is not a tax filing — it’s a reconciliation of what you already paid versus what you actually owed. Here’s the mechanics:
- Monthly withholding (원천징수): Throughout the year, your employer withholds estimated income tax from each paycheck — based on tables set by the NTS.
- January–February reconciliation: Your employer compiles your actual annual income and deductions, calculates the true tax owed, and compares it to what was withheld.
- Refund or additional payment: If you overpaid through monthly withholding → you get a refund (환급) in February paycheck. If you underpaid → you owe additional tax, deducted from your paycheck.
✅ Most foreign workers get a refund
Monthly withholding tables are somewhat conservative — they withhold slightly more than necessary for most workers. Most employed foreigners receive a modest refund (typically KRW 200,000–600,000) in February after their employer completes the settlement.
6. Year-End Tax Calendar
Oct–Dec
Decide flat vs progressive rate for the year. Gather deduction documents.
January
연말정산 starts. Submit deduction documents to HR. Elect flat rate if applicable.
February
Employer completes settlement. Refund or additional deduction appears in February paycheck.
March 10
Employer submits withholding tax summary (지급명세서) to NTS.
May
Comprehensive income filing (종합소득세 신고) deadline — for those with income beyond their main employment (freelance, overseas income, etc.)
May–June
연말정산 correction filing (수정신고) window for employees who missed deductions in February.
July
Interim tax payment (중간예납) for self-employed/comprehensive income filers
Nov 30
종합소득세 납부 final deadline
7. Key Deductions and Credits for Foreigners
When using the progressive rate, these deductions reduce your taxable income or tax owed. Foreigners are eligible for most standard deductions that Korean employees receive:
| Deduction type | Amount | Available to foreigners? |
|---|---|---|
| Employment income deduction (근로소득공제) | Progressive: 70% for income up to KRW 5M, scaling down to 2% for high earners | ✅ Yes — applied automatically before calculating tax |
| Basic personal exemption (기본공제) | KRW 1,500,000 per person (self + qualifying dependents) | ✅ Yes — yourself always qualifies |
| National Pension deduction (국민연금 공제) | Full contribution amount deductible (employee share) | ✅ Yes — if you pay Korean national pension |
| Health Insurance deduction (건강보험 공제) | Full employee contribution amount deductible | ✅ Yes — if enrolled in NHIS |
| Card spending deduction (신용카드 공제) | 15–40% of spending above 25% of total income (capped at KRW 3,000,000) | ✅ Yes — if you use Korean credit/debit cards |
| Medical expense deduction (의료비 공제) | Medical expenses exceeding 3% of total income — 15% credit (30% for some types) | ✅ Yes — for medical expenses paid in Korea |
| Housing rental deduction (월세 공제) | 15–17% of annual rent payments (if total income ≤ KRW 70M, capped at KRW 7,500,000/year) | ✅ Yes — if renting a qualifying property |
| Education expense deduction | Education fees for qualifying dependent children | ⚠️ If dependents are enrolled in Korean educational institutions — confirm with HR |
| Overseas income / foreign tax credit | Taxes paid to another country may be credited against Korean tax owed | ⚠️ Complex — depends on tax treaty status. Seek professional advice. |
📌 The housing deduction is often overlooked by foreigners
If your annual income is KRW 70,000,000 or below and you rent a property (wolse) in Korea, you may be eligible for a 15% tax credit on your monthly rent payments (up to KRW 7,500,000/year). This requires registering the lease contract with the NTS. Many foreign workers miss this credit entirely. Confirm eligibility with your company HR or a 세무사.
8. How to Complete 연말정산
-
1
Use 홈택스 (Hometax) to gather deduction documents automatically
The NTS operates 홈택스 (hometax.go.kr) — Korea’s tax portal. In January, you can log in and download a pre-compiled deduction summary (간소화 서비스) that automatically collects your medical receipts, insurance payments, card spending, pension contributions, and more. This single download replaces gathering dozens of individual receipts. Login requires your ARC number and certificate or mobile verification.
-
2
Decide: flat rate or progressive rate for this year
Before submitting documents to HR, calculate both options. Use the Hometax calculator or ask your company’s 경리 (finance/accounting) team to run both scenarios. This decision must be made during the 연말정산 window — you cannot change it retroactively.
-
3
Submit documents and election form to your employer’s HR
Your HR or 경리 team will request your deduction documents by a specific internal deadline (usually early-to-mid January). Submit the 홈택스 간소화 서비스 printout plus any additional deduction documents (lease contract for 월세 공제, etc.). If electing the flat rate, submit the 단일세율 적용신청서 at this stage.
-
4
Receive refund or additional deduction in February paycheck
Your employer completes the reconciliation and the difference appears in your February salary. A refund shows as a positive addition; additional tax owed appears as a deduction. Review your February pay stub to confirm the amount matches the preliminary calculation HR provided.
-
5
If you have other income: file 종합소득세 in May
If you earned income beyond your main employment (freelance work, overseas dividends, rental income, etc.), you must separately file 종합소득세 (comprehensive income tax) by May 31. Employment-only workers do not need this step — 연말정산 through your employer is sufficient.
9. Tax When Leaving Korea
| Situation | What to do |
|---|---|
| Leaving Korea mid-year (before December) | Your employer must conduct an interim 연말정산 (중도퇴직 정산) before your final paycheck. This reconciles your tax for the partial year. Any refund is included in your final paycheck; any additional tax is deducted. |
| National Pension lump-sum refund | If you paid into Korean National Pension and are leaving Korea permanently, you can claim a lump-sum refund of your contributions (not employer’s share). Apply at any NPS branch or online before departure. Valid within 5 years of departure. |
| Tax clearance certificate (납세증명서) | Some visa cancellation or re-entry situations require a tax clearance certificate showing no outstanding Korean tax debt. Available from any NTS office or Hometax online. |
| Final tax filing if leaving before year-end settlement | If you leave Korea before the January–February 연말정산 period, your employer handles the settlement at the time of departure. You don’t need to return for tax settlement. |
10. Common Questions
Q: I just started working in Korea this year. Do I need to file Korean taxes?
If you’re employed by a Korean company on an E-7, E-2, or similar work visa, your employer handles your income tax through monthly withholding and year-end settlement. You don’t need to file independently. Simply participate in your company’s 연말정산 process in January–February.
Q: My home country also taxes me. Am I paying tax twice?
Possibly — if both Korea and your home country claim your income as taxable. Korea has tax treaties with 90+ countries that determine which country has primary taxing rights and how credits work. If your home country taxes Korean-source income, you may be able to claim a foreign tax credit for Korean taxes paid. This is complex — consult both a Korean 세무사 and a tax advisor in your home country if this applies to you.
Q: My company says I don’t qualify for the flat rate. Is that possible?
Yes — if you started working in Korea after December 31, 2026 (once the current sunset provision expires), or if your income is from business rather than employment, you may not qualify. Also, some HR departments are simply unfamiliar with the flat rate election. If you believe you qualify and HR says you don’t, ask them to confirm with the NTS directly or consult a 세무사.
Q: I do some freelance work on the side in addition to my regular job. How is that taxed?
Freelance income (사업소득) is taxed separately from employment income. You must file 종합소득세 (comprehensive income tax return) by May 31 to report and pay tax on the freelance income. The progressive rate applies to your combined income. The foreigner flat rate only applies to employment income — not freelance.
Q: My company doesn’t do 연말정산 for foreign employees. What do I do?
All Korean employers are legally required to conduct 연말정산 for all employees, including foreigners. If your company is not doing this, this is a compliance issue on their part. Bring it to HR’s attention and if unresolved, you can file your own year-end settlement through Hometax (홈택스.go.kr) directly. Call the NTS helpline (126 — English available) for guidance.
✅ Korea income tax — key points for foreign workers
- Monthly withholding is automatic — you’re already paying tax
- 연말정산 in January–February reconciles what you paid vs. what you owe
- Most foreign workers receive a modest refund in February
- Flat 19% rate available — but progressive rate is usually better below KRW 90M income
- Calculate both options every year before submitting to HR
- Housing rental (월세) deduction is frequently missed — claim it if eligible
- Additional freelance or overseas income? File 종합소득세 separately by May 31
- NTS helpline: 126 (English language support available)
Related: Korea Salary Guide 2026: Industry Ranges and Take-Home Pay →
Related: Korea Health Insurance for Foreigners: Contributions and Deductions →
Disclaimer: This guide is based on Korean income tax law and NTS guidelines as of 2026. Tax law is subject to change and individual circumstances vary significantly. The comparison between flat rate and progressive tax involves estimates — actual amounts depend on your specific income, deductions, and personal situation. This guide does not constitute tax advice. For your specific situation, consult a licensed Korean 세무사 (certified tax accountant) or the NTS helpline at 126.