Every American living in South Korea faces the same fork in the road on their US return: claim the Foreign Earned Income Exclusion (FEIE) and exclude your Korean salary from US tax, or claim the Foreign Tax Credit (FTC) and offset your US tax with the Korean tax you already paid. Because Korea's income tax is often higher than US tax at the same income, the FTC frequently wins for Korea-based expats — and can even leave you with leftover credits to carry forward. This US expat FEIE vs Foreign Tax Credit calculator compares both for your numbers and names the better choice, with the US tax owed under each.
Enter your Korean salary, the Korean tax you paid, and your filing status, and the calculator estimates your US tax under the FEIE and under the FTC and tells you which leaves a smaller US bill.
The two reliefs attack double taxation from opposite directions. The FEIE removes up to $132,900 (2026) of foreign earned income from your US taxable income, so you are not taxed on it at all. The FTC keeps the income taxable but gives you a dollar-for-dollar credit for the foreign income tax you paid on it. If the foreign tax is high, the credit can wipe out your US tax on that income — and any excess credit is not wasted; it carries over.
Here is the Korea-specific insight. Korea's effective income-tax rate frequently exceeds the US rate at the same salary, especially once the 10% local surtax is included. When the foreign tax you paid is larger than the US tax on that income, the FTC not only reduces your US tax to zero on that income but leaves you with excess foreign tax credits you can carry back one year and forward ten. The FEIE can only ever get you to zero on the excluded slice — it never banks a future benefit. For many salaried Americans in Korea, that makes the FTC the stronger long-run choice.
The FEIE is better when your Korean tax is low or zero relative to US tax — for instance lower earners, those benefiting heavily from the flat-rate election, or income that Korea taxes lightly. It is also simpler, and it can be combined with the foreign housing exclusion for high rent. And for someone whose income is modest enough to be fully excluded, the FEIE delivers a clean $0 with less paperwork than tracking and carrying credits.
A single American in Seoul earns $80,000 and paid $12,000 of Korean income tax:
| Path | US tax on the income | Notes |
|---|---|---|
| FEIE | $0 | Whole $80,000 excluded (under the $132,900 cap) |
| FTC | $0 | US tax before credit ~$7,000 fully offset by the $12,000 Korean tax |
| FTC bonus | — | ~$5,000 excess credit carried forward up to 10 years |
Both get you to $0 US tax this year — but only the FTC leaves a carryover that can shelter future US tax (handy if you later have US-taxable income or move home). That tilt toward the FTC is exactly what the calculator surfaces, and it is why blindly defaulting to the FEIE can leave value on the table for Korea-based filers.
One rule makes this decision sticky. If you revoke the FEIE after claiming it, you generally cannot re-elect it for five years without IRS consent. So switching from FEIE to FTC is not a casual year-to-year flip — it is a multi-year commitment. Before you drop the FEIE for the FTC, be reasonably confident the FTC is your better path going forward, because reversing course is costly and slow.
The FEIE and FTC are not strictly either/or. You can exclude up to the cap with the FEIE and claim the FTC on income above it. For high earners over $132,900, the typical structure is FEIE on the first chunk and FTC on the excess — but the foreign tax credit on the excluded portion is disallowed (you cannot credit tax on income you also excluded). The calculator models the clean single-method comparison; high earners with income above the cap should plan the hybrid with a preparer.
Neither the FEIE nor the FTC touches self-employment tax. If your Korean income is from freelancing, the 15.3% US SE tax still applies regardless of which income-tax method you pick — only a totalization agreement can remove it. This page compares the two income-tax reliefs; for the SE-tax layer, use our FEIE + SE-tax calculator.
One more reason expats lean toward the FTC: the refundable Child Tax Credit. Excluding all your income with the FEIE can leave you with no earned income for the refundable portion of the credit, whereas using the FTC keeps the income on the return and can preserve eligibility. For American families in Korea, this can be worth more than the income-tax difference itself — a key factor the headline tax numbers do not show.
The comparison uses the 2026 brackets and standard deduction, the $132,900 FEIE cap with the stacking rule, and the FTC limitation (credit capped at the US tax on the foreign income). It is a solid directional guide to which method wins and the rough US tax under each. It does not model the housing exclusion, the precise Form 1116 limitation across income categories, the Child Tax Credit interaction, state tax, or the hybrid approach. Use it to frame the decision, then confirm with a cross-border CPA before electing — especially given the five-year lock-in.
It depends on the numbers, but the Foreign Tax Credit (FTC) often wins in Korea because Korea's effective income tax frequently exceeds US tax at the same salary. When the Korean tax paid is larger than the US tax on that income, the FTC reduces US tax to zero and leaves excess credits to carry forward, which the FEIE never does. This calculator compares both and names the better choice.
Because Korean income tax, including the 10% local surtax, is often higher than US tax on the same income. When foreign tax exceeds the US tax on that income, the FTC zeroes out your US tax on it and banks the excess as a carryover (back one year, forward ten). The FEIE can only get you to zero on the excluded slice and never creates a future benefit.
The FEIE wins when your Korean tax is low or zero relative to US tax, such as lower earners or those benefiting from Korea's flat-rate election, or for income Korea taxes lightly. It is also simpler, can be paired with the foreign housing exclusion, and delivers a clean $0 for income small enough to be fully excluded.
Not freely. If you revoke the FEIE after claiming it, you generally cannot re-elect it for five years without IRS consent. So moving from the FEIE to the FTC is a multi-year commitment, and you should be confident the FTC is your better path before dropping the exclusion.
Yes, in a hybrid. You can exclude up to the $132,900 cap with the FEIE and claim the FTC on income above it. However, you cannot take a foreign tax credit on income you also excluded. High earners above the cap typically use FEIE on the first portion and FTC on the excess, which is best planned with a preparer.
No. Neither relief touches US self-employment tax. If your Korean income is from freelancing, the 15.3% SE tax still applies regardless of which income-tax method you pick; only a totalization agreement can remove it. This comparison is about income tax only.
Using the FEIE to exclude all your income can leave you with no earned income for the refundable portion of the Child Tax Credit, while the FTC keeps the income on the return and can preserve eligibility. For American families in Korea this can be worth more than the income-tax difference, so it is a key factor beyond the headline tax numbers.