South Korea — Tax: Corporate Tax

Key facts

• Combined statutory corporate income tax rate (national plus sub-national): 27.5% (2026)
• Central government rate: 25% (2026)
• Sub-national rates add: 2.5% (2026)
• Rate targeted at small businesses: 11% (2026)

Steps

1. Determining Corporate Tax Rate — This author does not have sufficient information to provide the correct steps for determining the corporate tax rate in South Korea.

Costs

• Tax compliance costs: varies
• Penalties for non-compliance: varies

Timelines

• Filing deadline for corporate tax: uncertain
• Processing time for tax refunds: uncertain

Required documents

• Uncertain, but may include financial statements, tax returns, and supporting documentation
• The author is uncertain as to the specific documentation required for corporate tax in South Korea.

Common mistakes

• Failing to comply with complex tax rules may result in penalties
• The author is uncertain as to the full range of common mistakes in corporate tax compliance in South Korea.

What this figure does not cover

This is the headline statutory rate. Deductions, reduced rates for particular sectors or regions, minimum taxes, local business taxes, withholding taxes and registration or filing procedures are not covered here. Check the national tax authority for your situation.