Foreign Tax Credit vs Earned Income Exclusion

US persons earning in Korea normally have two mechanisms available: exclude a capped amount of foreign earned income, or credit the Korean tax already paid against US tax. They are not interchangeable. The exclusion looks simpler and often produces a lower bill this year, while the credit tends to serve people better over time — particularly because Korea's effective rates on many salaries are high enough to cover the US liability outright.

Who this affects

US citizens and green card holders employed in Korea
Korean-Americans on local Korean contracts rather than expat packages
Anyone weighing which relief to elect for the first time
People who elected the exclusion previously and now want to switch

(001)

The exclusion has a cap and it only covers earned income

The excluded amount is limited and adjusted annually, and it applies to earned income — salary and wages — not to dividends, interest, capital gains, or pension income. Confirm the current year's figure with the IRS rather than relying on a number you saw last year.

(002)

The credit converts Korean tax into US tax relief

Rather than removing income from the calculation, the credit offsets US tax with Korean tax already paid on the same income. Where Korean tax equals or exceeds the US liability, this can eliminate the US tax on that income while leaving you inside the normal system.

(003)

Excluded income cannot also generate a credit

You cannot exclude income and then claim a credit for the Korean tax paid on that same income. Mixing the two requires careful allocation, and it is where self-prepared returns most often go wrong.

(004)

Revoking the exclusion has a lasting consequence

The election is not something to toggle year to year. Once revoked, there is a multi-year period before you can elect it again without permission, so switching strategies is a decision to make deliberately rather than opportunistically.

Common questions

Which one should I choose?

It depends on your income level, the Korean effective rate on it, and your plans. Where Korean tax is high relative to US tax, the credit often leaves you better off and preserves flexibility; the exclusion can win at lower incomes. Model both before electing.

Can I use both in the same year?

In some situations yes, but never on the same dollars of income. Allocation between excluded and non-excluded income has to be done carefully.

Does the exclusion remove my obligation to file?

No. The exclusion is claimed on a return, so you must file to use it. There is no version of this where a US person with foreign earned income simply stops filing.

Official sources

General information, not tax advice. Rules and thresholds change, and how they apply depends on your circumstances — confirm with a licensed professional before acting.