How Do Foreigners File Income Tax in Korea as a Business Owner?

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How Do Foreigners File Income Tax in Korea as a Business Owner?

“I’m a foreigner running a business in Korea. How do I file and pay income tax?”

If you operate a business in Korea as an individual business owner, you may have to file a Global Income Tax Return (종합소득세 신고) in Korea.

Being a foreigner does not automatically exempt you from Korean income tax.

When Do Foreign Business Owners File Income Tax?

Korea generally requires individuals with business income to file their annual income tax return for the previous year's income.

The regular filing period is May 1 to May 31 of the following year.

For example, income earned during 2026 would generally be reported in May 2027.

How Is Business Income Taxed?

For an individual business owner, taxable business income is generally calculated by taking necessary business expenses into account.

The resulting taxable income is then subject to Korea's progressive global income tax rates.

This means that keeping accurate records of your business revenue and eligible expenses can be important when calculating your final tax liability.

What About Foreign Business Owners?

Foreign business owners may be subject to Korean income tax depending on whether they are considered Korean tax residents or non-residents.

Korean tax residents are generally taxed on their worldwide income, while non-residents are generally taxed on Korean-source income.

If a non-resident maintains a business place in Korea, they may also have a Korean filing obligation.

Don't Forget Other Taxes

Income tax is not necessarily the only tax you need to consider when running a business in Korea.

Depending on the type of business, you may also need to consider VAT (Value Added Tax) and other tax obligations.

The applicable filing requirements can vary depending on your business structure and activities.

Running a Business in Korea?

For foreign business owners, Korean tax rules can be complicated, especially when you have overseas income or are unfamiliar with the Korean tax system.

If you are unsure how to calculate your business income or which expenses can be recognized for tax purposes, consulting a qualified tax professional can help you file correctly and avoid unnecessary tax problems.

Professional advice can also help you understand your tax residency, business income, deductible expenses, and other tax obligations in Korea.