Foreign Worker Flat Tax Rate Korea 2026: 19% vs Up to 45%, and the 20-Year Deadline

Bottom line: If you earn wage income in Korea as a foreign worker, you can elect a flat 19% tax rate on that income instead of the regular progressive rate (6–45%) when you file your year-end tax settlement or your May comprehensive income tax return. It only applies if you file the application — it is never automatic — and only for tax years ending within 20 years of the date you first started working in Korea. It does not apply to business income, daily workers, or tourists.

If you didn't know: Skip the application and a higher earner pays under the regular progressive rate, which tops out at 45% — the gap between that and 19% becomes extra tax you didn't have to pay. But choosing the 19% flat rate means giving up every income deduction (personal deductions, insurance premium deductions, and so on), so if your income is modest or your deductions are large, the regular progressive rate can actually be cheaper. Run both calculations before you file, or either choice can cost you.

The flat rate applies to foreign executives and employees, but not to daily workers. Foreign employees at the regional headquarters of a foreign-invested company get the 20-year window regardless of when they started; everyone else only qualifies if they first started working in Korea on or before December 31, 2023. It's easy to miss that this isn't a one-time, permanent choice — you have to file the application again at every year-end settlement or final return. One tax tribunal case found that missing the filing deadline makes it hard to claim the rate retroactively through an amended return. If your income level is borderline, ask your company's payroll team or a tax accountant to run both calculations before you decide.

This article summarizes official guidance. It is not legal, medical, or financial advice.

Journey stage: During the trip · Verified 2026-10-30