Korean Year-end Tax Settlement (연말정산) — Top Deductions for 2026

Year-end tax settlement (연말정산) is Korea's annual income tax reconciliation for wage earners. Run by employers in January–February, it determines whether you receive a refund or owe additional tax for the prior calendar year. Knowing which deductions to claim can move the needle by several hundred thousand KRW.

Income Deductions (소득공제)

These reduce the taxable base before tax brackets are applied. High-bracket earners benefit more.

• Basic deduction: KRW 1.5 million per dependent including yourself
• Credit card / debit card / cash receipts: 15–40% of spending above 25% of total income
• Housing fund deduction: Up to KRW 4 million for jeonse loan principal repayment (homeowners excluded)
• Personal pension premium: National Pension and other social insurance fully deductible

Tax Credits (세액공제)

These reduce the final tax bill directly, dollar-for-dollar. Generally more powerful for low-to-mid income earners.

• Personal pension / IRP: Up to KRW 9 million combined gets 13.2–16.5% credit (annual limit varies by age)
• Medical expenses: 15% credit on spending exceeding 3% of total income
• Education expenses: 15% credit, varying caps by recipient (yourself, dependents)
• Donations: 15% credit (20% for amounts over KRW 10 million)
• Monthly rent (월세): 17% credit on rent paid, up to KRW 7.5 million annual rent

Tactics That Move the Needle

• Spousal strategy: Concentrate credit card spending on the higher-income spouse if both work
• Pension max-out: Fully use the KRW 9 million pension cap — guaranteed 13.2%+ return via the tax credit alone
• December timing: Push medical and education spending to December if you're below the threshold for the year
• Rent receipts: File with rent paid even if you forgot earlier — claim within 5 years via amended return