If you are an expatriate, foreign engineer, teacher, or international professional working in South Korea, every January brings the country’s most significant personal finance event: Yeonmaljeongsan (연말정산 - Year-End Tax Settlement).
Commonly referred to as the “13th Month Salary”, doing your tax settlement correctly can yield a direct bank refund of 1,000,000 KRW to 3,000,000+ KRW in February.
1. The Big Choice: 19% Flat Tax Rate vs. General Progressive Tax Rate
Foreign employees in Korea enjoy a unique tax benefit: the option to choose between the standard progressive tax system and a 19% flat tax rate.
2. Key Deductions Foreigners Frequently Miss
- Credit and Debit Card Usage: Spending exceeding 25% of your gross annual salary qualifies for deductions (15% for credit cards, 30% for check cards/cash receipts).
- Monthly Rent Tax Credit (Wolse): Foreign workers who are registered residents and meet income thresholds can claim up to 17% tax credit on rent paid.
- Medical Expenses: Qualified medical bills in excess of 3% of your annual salary are eligible for a 15% tax credit.
3. Step-by-Step HomeTax Guide for Foreign Workers
Access Hometax English Service
Visit hometax.go.kr and select 'Foreigner Tax Service'.
Download PDF Statement
Use your Alien Registration Number (ARC) to download the Simplified Tax Settlement PDF.
Submit to HR Department
Hand over the PDF file and supplementary receipts to your company HR before late January.
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