F-6 Marriage Visa Tax Guide 2026

How tax works when you marry a Korean — individual filing, deductions, and the joint filing trap.

Updated: 2026-05-22 · 6 min read · KunStudio

If you hold an F-6 (Marriage Immigration) visa, you're married to a Korean citizen and likely living in Korea. Many F-6 holders assume Korean tax allows joint filing with their Korean spouse — that's the most common misconception. Here's how it actually works.

⚠ Key rule: Korean tax is filed individually, not jointly. Unlike the US, you and your Korean spouse each file separately. But you can claim spouse deduction if your spouse earns below the threshold.

1. F-6 Tax Residency

F-6 holders living in Korea are tax residents from day one. This means:

Korea taxes your worldwide income (Korean job, freelance, foreign rental, dividends, etc.)
You file in Korea, but can claim foreign tax credit for taxes already paid abroad
F-6 spouses with overseas income (e.g., remote work for US company) must declare it

2. Individual Filing — No Joint Filing

This trips up many F-6 holders coming from the US:

Country	Joint Filing?
USA	Yes (Married Filing Jointly)
Germany	Yes (Ehegattensplitting)
Korea	No — individual only
Japan	No — individual only
UK	No — individual only

Each spouse files their own return. Your income is not combined with your Korean spouse's.

3. Spouse Deduction (배우자 공제)

Even though filing is individual, you can claim a spouse deduction of KRW 1,500,000 if your spouse meets the income threshold:

Threshold: spouse annual income ≤ KRW 1,000,000 (i.e., spouse doesn't work much)
Only one spouse can claim — typically the one with higher income claims
If both spouses work full-time, neither qualifies for spouse deduction

✓ Strategy: If you're the F-6 holder and a stay-at-home parent (income ≤ KRW 1M), let your Korean spouse claim you as a deduction. Saves them ~KRW 100K-500K in tax.

4. Dependent Deduction (부양가족)

Each child = KRW 1,500,000 deduction (under age 20). Your Korean spouse typically claims them, but you can if you're the higher earner.

Other dependents (parents in Korea or abroad living with you, age 60+) = also KRW 1,500,000 each.

5. F-6 Specific Deductions

Multicultural Family Support (다문화가족)

F-6 families qualify for special government programs:

Free Korean language classes at multicultural family support centers (다문화가족지원센터)
Childcare subsidies for international families
Job training programs for F-6 spouses

These aren't tax deductions but reduce family costs significantly.

Year-End Settlement (연말정산)

If you work for a Korean company, your employer handles year-end settlement in January-February. You provide them:

Korean Resident Registration Number (외국인등록번호)
Family member info for dependent claims
Receipts for medical, education, donation expenses

6. Self-Employed / Freelance F-6

If you freelance or run a small business (no D-8 needed since F-6 allows free economic activity):

Issue 사업자등록 (business registration) if revenue > KRW 1,200,000/year
File 종합소득세 (comprehensive income tax) every May 1-31
VAT registration if revenue > KRW 80M/year (간이과세) or anytime (일반과세)

7. Foreign Income on F-6

Many F-6 holders earn income from their home country (rental, dividends, remote work). Korea taxes these:

Declare in May comprehensive income tax
Claim foreign tax credit (Form 별지 50호)
Tax treaty rates apply (90+ countries)

If you continue paying US tax (US citizenship), FEIE (Foreign Earned Income Exclusion) on your US return + Korea foreign tax credit usually means little double taxation.

8. F-6 Path to Korean Citizenship Tax Impact

F-6 → permanent residency (F-5) → naturalization (Korean citizen) reduces some restrictions but tax-wise stays the same (you're already a tax resident). However:

Korean citizen status may affect your home country's tax (especially US — you may renounce US citizenship to escape global tax)
Korean inheritance/gift tax treats foreign-source assets differently for citizens vs F-6 holders

9. Common F-6 Tax Mistakes

❌ Trying to file jointly with Korean spouse (impossible — Korean tax = individual)
❌ Not declaring foreign rental income (NTS receives info via tax treaty exchange)
❌ Both spouses claiming the same child (only one can)
❌ Missing year-end settlement deadline (you lose deductions)
❌ Forgetting to update employer when family status changes (marriage, child birth)

10. Tax Calendar for F-6 Holders

Date	What's due
Jan-Feb	Year-end settlement (salary earners)
May 1-31	Comprehensive income tax (freelance, foreign income)
Jul 25	VAT Q2 (if self-employed)
Jan 25	VAT annual final settlement

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