Korean Tax and Accounting Insights

Korean corporate income tax in 2026: rates, filing deadlines and first-year traps for foreign-owned subsidiaries

Korea raised every corporate income tax bracket by one percentage point for fiscal years beginning on or after 1 January 2026, so national rates now run from 10% to 25%, with local income tax on top. This guide covers the brackets, the annual filing calendar for a December year-end company, loss carryforward limits and the points a new foreign-owned subsidiary most often misses in its first year.