Quick answer
Korean corporations, including foreign-invested ones, pay progressive corporate income tax plus a 10% local income tax on that amount. They also handle 10% VAT, withholding tax on payments such as dividends, royalties and interest to non-residents, and payroll taxes and social insurance for employees. Tax treaties can reduce withholding, and a filing calendar prevents penalties.
Expanding into South Korea opens access to one of Asia’s most advanced and profitable markets.
But success requires more than registering your company — understanding the Korean tax system is critical for long-term growth and compliance.
This guide highlights the key tax obligations foreign companies face when expanding into Korea, along with practical tips to manage them effectively.
Corporate Income Tax (CIT) 📊
Korean corporations, including foreign-invested entities, are subject to progressive corporate income tax rates:
- 9% on taxable income up to ₩200 million
- 19% on ₩200 million – ₩20 billion
- 21% on ₩20 billion – ₩300 billion
- 24% on taxable income above ₩300 billion
A local income surtax of 10% of the corporate tax amount applies, bringing the combined effective top rate to ~26.4%.
Value-Added Tax (VAT) 💰
- Standard rate: 10% on most goods and services
- Registration: Mandatory with the National Tax Service (NTS) after incorporation
- Filing: Returns must be submitted quarterly; input VAT is generally creditable against output VAT
Withholding Taxes 📝
Foreign companies making cross-border payments should review Korea’s withholding tax rules:
- Dividends: 20% + 2% local surtax (may be reduced under tax treaties)
- Interest & Royalties: 20% + 2% local surtax (treaty benefits often apply)
Tip: Korea has signed 90+ Double Taxation Treaties (DTTs) — applying treaty rates can reduce withholding significantly.
Transfer Pricing Rules 📑
Cross-border transactions between related parties must comply with arm’s length principles.
- Maintain documentation to show prices reflect market value
- Non-compliance can result in adjustments, penalties, and interest charges
Payroll & Personal Income Tax 👥
Employers are responsible for withholding personal income tax and contributing to Korea’s four mandatory social insurances:
- Personal Income Tax: Progressive 6–45% rates, plus local surtax
- Social Insurance: Shared cost for:
- National Pension
- National Health Insurance
- Employment Insurance
- Industrial Accident Compensation Insurance
Tax Incentives for FDI 🎁
South Korea offers several programs to attract foreign direct investment:
- Tax Holidays/Reductions: For high-tech or strategic industries
- Regional Incentives: In Free Economic Zones (FEZs) and Special Economic Zones (SEZs)
- R&D Credits: For tech and innovation-driven projects
- Government Support: Streamlined processes under the Foreign Investment Promotion Act (FIPA)
Filing & Reporting Deadlines 📅
| Tax Type | Deadline |
|---|---|
| Corporate Income Tax | Annually, within 3 months after fiscal year-end |
| VAT | Quarterly |
| Withholding Tax | Monthly or quarterly, depending on payment type |
Warning: Late filings can result in penalties up to 20% of tax due plus interest.
Building a Tax-Ready Strategy 🚀
South Korea’s tax regime is transparent and investor-friendly, but navigating it without local expertise can be challenging.
From corporate tax to VAT, payroll, and transfer pricing, every step requires accuracy and compliance.
At SMA Lawfirm, we provide:
- Full tax registration and compliance support
- Corporate tax, VAT, and payroll filing services
- Guidance on tax-efficient corporate structuring
- Advisory on incentives and FDI benefits
📩 Ready to expand into Korea with confidence?
Contact SMA Lawfirm today and ensure your Korean business is compliant and optimized for growth.
Official Sources
For authoritative reference, consult the following Korean government portals: