Freelancer Tax Guide in Korea

Freelancer vs Employee: Tax Treatment Differences

In Korea, the tax treatment for freelancers (프리랜서) and employees (근로자) is fundamentally different. Understanding this distinction is critical because it affects how much tax you pay, when you file, and what deductions you can claim.

Warning:Some Korean companies misclassify employees as freelancers to avoid paying social insurance and severance. If you work fixed hours at a specific location under a manager's direction, you may legally be an employee regardless of what your contract says. This matters for tax filing and labor protections.

The 3.3% Withholding (사업소득 원천징수)

When a Korean company pays a freelancer, they withhold 3.3% from each payment: 3% as income tax (소득세) and 0.3% as local income tax (지방소득세). This is called withholding at source (원천징수).

Critical point: This 3.3% is NOT your final tax. It is merely a prepayment -- an advance payment against your actual tax liability for the year. Think of it as a deposit. Your real tax rate will be determined when you file your Comprehensive Income Tax return (종합소득세 신고) in May of the following year.

For example, if you earn 5,000,000 KRW from a freelance project, the company withholds 165,000 KRW (3.3%) and pays you 4,835,000 KRW. That 165,000 KRW is reported to the National Tax Service (국세청) and credited to your account. When you file in May, if your actual tax liability is higher than the total withheld throughout the year, you pay the difference. If it is lower, you receive a refund.

Important: If your annual freelance income is low enough that your effective tax rate after deductions is below 3.3%, you will receive a refund when you file. Many freelancers with modest income actually get money back in May.

Comprehensive Income Tax Filing in May (종합소득세)

Unlike employees whose taxes are settled by their employer in January-February, freelancers must file their own Comprehensive Income Tax return (종합소득세 신고) during May 1-31 each year, reporting the previous year's income. This is done through Hometax (홈택스) online or at your local tax office (세무서).

Korea's progressive tax brackets apply to your net taxable income after deductions:

Plus 10% local income tax (지방소득세) on the calculated amount. Use our Tax Comparison Calculator to see how these brackets apply to your income level.

Necessary Expenses Deduction (필요경비)

As a freelancer, you can deduct business-related expenses from your gross income before calculating tax. Korea offers two methods:

• Standard deduction rate (기준경비율 / 단순경비율): The tax office assigns standard expense rates by business type. For example, private tutoring might have a 60-70% standard expense rate, meaning only 30-40% of your income is taxable. This is the simpler method and is available for lower-income freelancers.
• Actual expense method (실제 경비): You track and report your actual business expenses with receipts and documentation. This method requires more bookkeeping but can result in higher deductions if your actual expenses exceed the standard rate. You must keep all receipts, invoices, and financial records for 5 years.

Which to choose: If your actual business expenses are low (e.g., you are a language tutor working from home), the standard deduction rate is usually more beneficial and much simpler. If you have significant equipment purchases, office rent, travel costs, or subcontractor payments, the actual expense method may save you more.

VAT Registration & Quarterly Payments

VAT registration (부가가치세 사업자등록): If your annual freelance revenue exceeds approximately 40 million KRW, you should register as a simplified VAT taxpayer (간이과세자). Above 80 million KRW, you become a general taxpayer (일반과세자) who must charge 10% VAT on invoices and file semi-annual VAT returns. Below 40 million KRW, you are generally exempt from VAT obligations.

Quarterly estimated tax (중간예납):If your previous year's income tax exceeded a certain threshold, the tax office may require you to make estimated quarterly payments. This is essentially paying taxes in advance based on your previous year's income to prevent a large lump-sum tax bill in May. You will receive a notice from the NTS (국세청) if this applies to you.

Record keeping: Maintain organized records of all income received and expenses incurred. Keep bank statements, contracts, invoices, and receipts for at least 5 years. The Korean tax authority (국세청) can audit freelancers, and proper documentation is your best defense. Consider using accounting software or hiring a Korean tax accountant (세무사) if your freelance income is substantial.

Common Mistakes Freelance Foreigners Make

Avoid these costly errors that foreign freelancers commonly make in Korea:

• Thinking 3.3% is the final tax: The most common mistake. Many freelancers assume the 3.3% withheld is all they owe and skip the May filing. This can result in penalties, interest, and a much larger tax bill when the NTS catches up.
• Not filing in May: Even if you expect a refund, you must file the Comprehensive Income Tax return. Failure to file results in penalties of 20% of the unpaid tax plus daily interest charges.
• Missing the deduction for National Pension: Freelancers paying National Pension as regional subscribers can deduct these contributions, but many forget to include them.
• Not registering for social insurance: Freelancers are still required to enroll in National Pension and Health Insurance. Avoiding enrollment can lead to back-payments with penalties when discovered.
• Assuming the 19% flat tax applies: The foreign worker flat tax is for employed workers (근로소득), not freelance business income (사업소득). Filing under the wrong category creates serious tax issues.
• Poor record keeping: Not keeping receipts and contracts makes it impossible to claim actual expense deductions during an audit. Digital copies of all documents are strongly recommended.

For a detailed breakdown of how your employment income is taxed, see our Salary Calculator. If you have both employed and freelance income, consult a licensed Korean tax accountant (세무사) to ensure proper filing.

Frequently Asked Questions