Who Is This For? A Guide for Foreign Freelancers in Korea
If you are an expat freelancing in Korea — teaching, translating, writing code, or consulting — some clients may pay you after 3.3% withholding. That treatment is not a special tax on foreigners. It can apply when the payment falls within a statutory category of personal-service business income, but not every freelance payment is classified or withheld the same way. The 3.3% is a prepayment; a resident generally settles qualifying business income with the rest of comprehensive income on the annual return, which can result in either a refund or additional tax.
- Resident or non-resident? Korean tax residence can arise from domicile or from having a place of residence for at least 183 days, and treaty tie-breaker rules can matter for dual residents. Residents and non-residents have different income scope, deductions, filing and withholding rules, so do not decide status from visa type or a day count alone.
- Check whether you must file. Salaried employees usually have a payroll year-end settlement, while many independent earners file their own May return. Certain personal-service business-income categories can have statutory year-end-settlement rules, so verify your category rather than assuming. If tax is due, missing a required deadline can trigger additions; a possible refund may still be claimable through a late return or correction claim within the statutory period.
- You do not need fluent Korean to get started. The National Tax Service runs an English-language Hometax service and publishes an annual English tax guide for foreigners, so you can check what was withheld and work through the filing in English — though the English interface covers less ground than the Korean one, so budget extra time for your first return.
The explanation below shows the ordinary domestic 3.3% withholding and a simplified resident filing example in Korean won. A foreign resident may still face treaty, foreign-tax-credit, income-sourcing, deduction, or reporting issues not modeled here. If a treaty applies or you could be resident in two countries, confirm your status and filing treatment with the National Tax Service or a tax professional.
The 3.3% Withholding and May Tax-Settlement Guide for Korean Freelancers
Freelance payments in Korea are often received after 3.3% withholding. That is a prepayment, not the final tax. The following comprehensive-income-tax filing settles the difference after all income, necessary expenses, and deductions, which can produce either a refund or an additional payment. This article explains the 3.3% and the May filing flow. (See the separate 3.3% vs 8.8% guide for that comparison.)
What 3.3% actually is: 3% income tax + 0.3% local income tax
A payment that falls within a statutory category of personal-service business income is withheld at 3% income tax, plus 0.3% local income tax equal to 10% of that amount — 3.3% in total. It is a prepayment, not the final rate. Other income is not uniformly subject to 8.8% either: for categories such as qualifying lecture or writing fees that receive a statutory 60% expense allowance, 22% withholding on the resulting income amount is equivalent to 8.8% of the gross payment. The parties cannot choose a category merely for the preferred rate; classification depends on the income type and facts such as continuity, independence, and the contract.
| Item | Withholdable business income (3.3%) | Other income with a 60% expense allowance (typically 8.8%) |
|---|---|---|
| Withholding rate | 3.3% | 8.8% |
| Nature | Statutory personal-service business income subject to withholding | Statutory other income (expense treatment varies by category) |
| May filing duty | Generally aggregated with other comprehensive income; check statutory exceptions | Generally aggregated if annual other-income amount after expenses exceeds KRW 3M; at or below that level, separate or comprehensive taxation may be chosen, subject to category-specific exceptions |
| Typical case | Independent, continuing services within a withholding category | A qualifying one-time writing or lecture fee |
Why a refund or additional payment can arise: withholding is a prepayment
The 3% income-tax withholding is a prepayment based on the payment amount. Final comprehensive income tax reflects allowable expenses and income deductions, applies progressive rates (6–45%), then accounts for credits, reductions, and prepaid tax. The result can therefore be a refund or an additional payment depending on all income, the applicable industry-code expense rate or book expenses, and the taxpayer's deductions and credits.
- Progressive rates (2026): 6% on a tax base up to KRW 14M, 15% on 14M–50M, 24% on 50M–88M, rising from there.
- Recognizing expenses: report actual, documented book expenses or, when the statutory conditions are met, estimate income with a simplified or standard expense rate.
- Simplified expense rate: the rate changes by tax year and exact industry code. Eligibility also depends on prior- and current-year revenue, new-business status, and exclusion rules; there is no single rate for all freelancers.
- Standard expense rate: major expenses such as purchases, rent, and payroll require qualifying evidence, while only the remaining portion is estimated. Missing evidence can materially reduce deductible expenses.
Simplified example: KRW 30M revenue with an assumed 64.1% rate
For illustration only, assume a business satisfies both the VAT-exemption conditions and the simplified-rate rules, and that its exact industry code and tax year carry a 64.1% simplified expense rate. It earns KRW 30M and has no other income, dependents, credits, reductions, or additions. Do not apply 64.1% to every freelancer.
- ① Already withheld: KRW 30M × 3.3% = KRW 990,000 prepaid.
- ② Simplified-rate expenses (illustrative 64.1% assumption): 30M × 64.1% ≈ KRW 19.23M → business income ≈ KRW 10.77M.
- ③ Income deduction: subtracting the KRW 1.5M personal basic deduction gives a tax base ≈ KRW 9.27M.
- ④ Computed tax: 9.27M × 6% ≈ KRW 556,000.
- ⑤ After the assumed credit: applying only the KRW 70,000 standard tax credit in this example gives national income tax of about KRW 486,000.
- ⑥ Settlement: comparing that with KRW 900,000 prepaid national tax gives an illustrative national refund of about KRW 414,000; the local-income-tax refund is about KRW 41,000 under the same simplified assumptions. The real result depends on the industry code, expense rate, other income, deductions, credits, and return details.
The difference between withholding and final tax can produce either a refund or an additional payment. This site's freelancer tax calculator only calculates net receipts after 3.3% withholding and reverses a target net amount to its gross contract value. Determine final comprehensive income tax from all income, expenses, and deductions through Hometax or a tax professional.
Easy-to-miss points and a 2026 checklist
- VAT filing: freelance work is not automatically VAT-exempt. Exemption applies only when the service satisfies a statutory exempt-personal-service category and its conditions. Taxable services, goods, or rentals may require registration and VAT filing. The VAT calculator separates amounts but does not classify a transaction's tax status.
- Check health-insurance status: status and premiums after leaving employment depend on dependent eligibility, optional continuation coverage, income, property, and other circumstances. This site's social insurance calculator estimates employee payroll deductions and does not calculate regional premiums.
- Keeping evidence: laptops, subscriptions, transport, and telecom costs may be deductible only to the extent they are business-related, satisfy tax rules, and have qualifying evidence such as tax invoices, cards, or cash receipts. Compare documented expenses with the applicable estimation rules; neither method is automatically more favorable.
- Missing the May deadline: if tax is due, non-filing and late-payment additions may apply. A potential refund does not automatically disappear the next day, however; a late return or correction claim may remain available within the statutory period. Check the filing type and deadline that apply to you through Hometax or the tax office.
- Interim prepayment & honest-filing review: if last year's tax exceeds a threshold, you may get a November interim prepayment notice, and larger revenue can trigger the honest-filing verification requirement.
Related tools and guides
- Freelancer tax calculator — 3.3% withholding net amount and gross reverse calculation
- 3.3% vs 8.8% comparison guide — the withholding difference between business and other income
- Social insurance calculator — estimate payroll deductions for an employee