US Taxes for American English Teachers in South Korea
EPIK placements, public-school contracts and hagwon jobs are the most common way Americans end up living in Korea, and they are also the most common way Americans end up several years behind on US filings without realizing anything was wrong. The Korean side is handled for you by your employer. The US side is not handled by anyone.
Why teaching contracts produce so many unfiled returns
A teaching contract in Korea is unusually self-contained. Your school registers you, withholds Korean tax from each pay cycle, and settles the year for you through the year-end settlement (연말정산 / yeonmal jeongsan). Nothing in that process involves the United States, nobody at the school is expected to mention it, and the paperwork you sign is entirely Korean. It is a reasonable inference that your taxes are taken care of. It is also wrong, and the reason is unrelated to Korea.
The United States taxes its citizens and green-card holders on worldwide income regardless of where they live. A first-year teacher earning a modest hagwon salary usually owes no US tax once relief is applied — but owing nothing and filing nothing are different things, and it is the unfiled return, not the unpaid tax, that creates the problem years later.
The teaching article, and what it actually does
The US-Korea income tax treaty contains a teaching article that can exempt a qualifying visiting professor or teacher from Korean tax for a limited period. This is the single most misunderstood provision for this group, and the misunderstanding runs in an expensive direction.
The treaty contains a saving clause which allows the United States to tax its own citizens as if the treaty had not entered into force. So the teaching article is a Korea-side benefit. It does not exempt an American from US tax and it does not remove the obligation to file.
The counter-intuitive part: paying less Korean tax can leave you owing more US tax. The Foreign Tax Credit can only credit Korean tax you actually paid. If a treaty exemption or a favorable election reduces your Korean tax to near zero, there is little left to credit, and more of the income is exposed on the US return.
The two relief mechanisms, and which one teachers usually want
There are two ways to avoid being taxed twice on the same salary, and they are not interchangeable:
- Foreign Earned Income Exclusion (FEIE), Form 2555. Excludes foreign earned income up to $130,000 for 2025, if you meet the physical presence or bona fide residence test. A teaching salary normally falls entirely under this cap.
- Foreign Tax Credit (FTC), Form 1116. Credits Korean income tax actually paid against US tax on the same income.
The choice matters for anyone with US-citizen children. Income excluded under the FEIE is not available to support the refundable Additional Child Tax Credit, because IRC §24(d)(3) bars the refundable credit outright for a taxpayer who elects the exclusion. A teacher with children is often materially better off using the credit rather than the exclusion — which is exactly the case where a low Korean tax bill, from a flat election or a treaty exemption, leaves too little credit to work with.
Korean-side items that follow a teaching contract
| Item | Korean treatment | What it means on the US return |
|---|---|---|
| Salary and year-end settlement | Withheld by the school, settled annually | Reportable wages; relieved by FEIE or FTC, never by the Korean settlement itself |
| National Pension (NPS) | 4.5% employee side in 2025, 4.75% in 2026 | Coverage governed by the US-Korea totalization agreement; a Certificate of Coverage evidences which system applies |
| Korean bank account | Ordinary local account | FinCEN Form 114 (FBAR) if all foreign accounts together exceed $10,000 at any point in the year |
| Contract-completion severance | Taxed as retirement income at a low effective rate | Ordinary compensation — see our guide to Korean severance |
| Flat-tax election | Single rate, no deductions or credits | Rarely advantageous at teaching salaries; reduces creditable Korean tax — see our flat-tax analysis |
| Jeonse (전세) housing deposit | Large lump-sum key-money deposit, refunded at lease end | FBAR-reportable if it pushes your aggregate foreign accounts over the threshold; currency movement on the refund can be a taxable gain, see our Jeonse deposit guide |
| Korean brokerage account (KODEX, TIGER ETFs) | Ordinary local investing | Korean ETFs are generally PFICs requiring Form 8621, see our investing-in-Korea guide |
If you are already behind
This is the common case, and it is usually not as bad as it feels. The IRS Streamlined Filing Compliance Procedures exist for taxpayers whose failure to file was non-willful — a genuine misunderstanding, which describes most teachers who assumed the school had handled it.
The Foreign Offshore track (Form 14653) requires 3 years of tax returns and 6 years of FBARs, and carries a 0% miscellaneous offshore penalty — but only if you meet the applicable non-residency test. For a US citizen or lawful permanent resident that test is no US abode and at least 330 full days outside the United States in at least one of the covered years.
The other track, Domestic Offshore (Form 14654), carries a 5% penalty — but it is not simply the fallback for someone who fails the non-residency test. It works by amending returns you already filed, on Form 1040-X. A teacher who never filed at all has nothing to amend and cannot use it. If you never filed and do not meet the non-residency test, neither streamlined track fits as-is, and the right next step is a conversation about the remaining options rather than a submission the IRS will not process.
So the tracks are separated by the non-residency test and by whether original returns exist — not by where you happen to live now.
Two practical points for teachers specifically. FBARs are filed electronically with FinCEN through the BSA E-Filing system, separately from the IRS package — a step that is easy to miss. And the non-residency test is easier to satisfy while you are still in Korea than after you move home, so the timing of a move is worth raising before it happens rather than after.
Whether any particular year qualifies depends on facts we would need to look at. Nothing on this page is a determination about your situation.
Taught in Korea and unsure whether you were supposed to be filing? Capital Tax Limited reviews teaching years, the treaty position, and which catch-up track the facts actually support.
Ask about a teaching-year reviewFrequently Asked Questions
I teach in Korea and my school withholds Korean tax. Do I still file a US return?
Yes. US citizens and green-card holders file on worldwide income wherever they live. Korean withholding and the year-end settlement (yeonmal jeongsan) satisfy Korea, not the IRS. What Korean tax does is give you relief mechanisms on the US return — the Foreign Earned Income Exclusion on Form 2555, or the Foreign Tax Credit on Form 1116 — not an exemption from filing.
Doesn't the tax treaty exempt teachers for two years?
The teaching article of the US-Korea income tax treaty can exempt a qualifying visiting teacher or professor from KOREAN tax for a limited period. It does not exempt a US citizen from US tax, because the treaty's saving clause lets the United States tax its own citizens as though the treaty were not in force. Read it as a Korea-side benefit that may reduce the Korean tax you can later credit, which can raise your US bill rather than lower it.
Should I take the 19% flat-tax election on my teaching salary?
Usually not, and teachers are the clearest case. The flat election trades away Korean deductions and credits for a single rate, so it only wins above a fairly high income level. A typical EPIK or hagwon salary sits well below that, where the ordinary progressive rates plus deductions produce less Korean tax. Because the election is made in Korea and changes how much Korean tax exists to credit, it also interacts with your US Foreign Tax Credit — model both sides before electing.
Are my Korean pension contributions and my bank account reportable?
Your Korean bank accounts are reportable on FinCEN Form 114 (the FBAR) if all your foreign accounts together exceed $10,000 at any point in the year — a single year of teaching salary passing through a Korean account can cross that line. National Pension (NPS) contributions are withheld at 4.5% from the employee side in 2025, rising to 4.75% in 2026, and the US-Korea totalization agreement governs which country's system you contribute to.
I taught in Korea years ago and never filed. What now?
The IRS Streamlined Filing Compliance Procedures exist for taxpayers whose failure to file was non-willful. The foreign track requires 3 years of returns and 6 years of FBARs, and it is available only if you meet the applicable non-residency test — for a US citizen, no US abode and at least 330 full days outside the United States in one of the covered years. Many former teachers meet that while still in Korea and stop meeting it after moving home, so timing matters. Whether you qualify is a question for a preparer looking at your actual years.
Provenance & Legal Context: Reviewed August 18, 2026. Grounded in IRC §911, IRC §901, IRC §24(d)(3), 31 U.S.C. §5314, the IRS Streamlined Filing Compliance Procedures, and the US-Korea Income Tax Convention including its saving clause. Streamlined thresholds, the FBAR threshold, the FEIE cap and Korean National Pension rates are drawn from the pinned fact base rather than restated by hand. This page is general information, not advice about your circumstances.
Reviewed by Ilya Fayerman, Esq. (NY Bar) on