Starting a Sole Proprietorship (개인사업자) in Korea: Tax & Visa Rules 2026
Launching a freelance career, opening an e-commerce shop, or setting up a local consulting agency in South Korea is an exciting venture. However, the path to running an independent business as a foreign resident involves navigating two distinct administrative gates: the Ministry of Justice for your visa permissions and the National Tax Service (NTS) for your business registration. Understanding how these systems interact is crucial to avoid heavy fines or visa cancellation.
📌 This article provides general legal and regulatory information. For personal tax calculations or legal immigration matters, always consult a certified tax accountant (세무사) or a registered immigration specialist.
Having walked through this registration process myself at the Mapo District Tax Office, I know firsthand that preparation is key. Setting up your business isn't just about obtaining a piece of paper; it's about structuring your operations to ensure you stay fully tax-compliant and maintain your residency status. Let's break down the rules step by step.
Who Can Register a Gaein Saeopja (개인사업자)? Visa Eligibility
To register a sole proprietorship (Gaein Saeopja) in Korea, you must hold a visa that allows business activities. Residents on F-series visas (F-2, F-4, F-5, F-6) have full rights to register, while E-series visa holders are generally restricted and D-series student/job seeker visa holders cannot register without a status change.
Under Korea's Immigration Service guidelines (as of June 2026), your visa class strictly determines whether the local tax office (세무서 - Semuseo) will accept your application. The rules are divided into three tiers:
- Eligible Residency (F-2, F-4, F-5, F-6): These statuses offer near-native labor rights. You can register any legal business type without needing prior immigration consent or large capital requirements.
- Employment Visas (E-7, E-2, E-1): These visas tie you to a single corporate sponsor. You cannot simply open a sole proprietorship on the side. To do so, you must secure an explicit consent form from your employer and apply for an out-of-workplace activity permit from the immigration office.
- Student & Job Seekers (D-2, D-10): These statuses strictly prohibit independent commercial activity. To register a business, a D-10 holder must convert to a startup visa, such as the D-8-4 Tech Startup Visa, which requires completing the OASIS program and earning points.
Failing to verify your visa status before applying can lead to automatic deportation proceedings for violating the Immigration Control Act. If your visa is restricted, it is highly recommended to consult the immigration portal HiKorea → for conversion paths before signing commercial agreements.
Simplified (Gani) vs. General (Ilban) VAT Taxpayer: 2026 Standards
In South Korea, all individual businesses are classified into one of two categories for Value Added Tax (VAT) purposes. This classification dictates how much VAT you collect, how often you file tax returns, and whether you can issue standard tax invoices to corporate clients.
A business with an annual revenue of less than 104 million KRW is classified as a Simplified VAT Taxpayer (간이과세자 - Gani Gwaseja), unless it falls under designated exclusion rules. General VAT Taxpayers (일반과세자 - Ilban Gwaseja) are those exceeding this threshold or operating in excluded fields and locations.
Crucial 2026 Exclusion Alert: Under the latest National Tax Service (NTS) directives, even if your annual revenue is below 104 million KRW, you cannot register as a Simplified Taxpayer if your business is physically located within a designated Gani Gwase Baeje Jiyeok (간이과세 배제지역 - Simplified VAT Exclusion Area). These zones represent high-growth central commercial districts, key office park zones, and premium neighborhoods in Seoul and Gyeonggi Province. If your registered office falls in these coordinates, you are automatically categorized as General.
| Feature | Simplified (Gani) | General (Ilban) |
|---|---|---|
| Revenue Threshold | Under ₩104 Million / year | ₩104 Million or more / year |
| VAT Rate | 1.5% to 4% (Industry dependent) | Flat 10% on sales |
| Filing Frequency | Once a year (January) | Twice a year (January & July) |
| VAT Payment Exemption | Exempt if annual sales under ₩48 Million | No exemption |
| Tax Invoices | Cannot issue if sales under ₩48 Million | Mandatory to issue upon request |
For B2B service providers, being a General Taxpayer is often preferred. Major Korean corporations generally refuse to work with simplified businesses that cannot issue standard tax invoices, as they need these invoices to claim their input VAT deductions. Calculate your client target base carefully before opting into a specific classification.
Step-by-Step Business Registration Process
Once you verify that your visa allows business registration and you have decided on your tax type, you can proceed to the registration itself. This can be done online through the official NTS portal or in person at your local tax office.
"All foreign residents registering a business must present their physical Alien Registration Card and a certified business address. Virtual offices are permitted for services, but subject to strict physical verification audits." — National Tax Service (NTS) Registration Guidelines, June 2026.
The registration process involves three clear stages:
- Secure a Place of Business: You must have a lease agreement. If you are registering using your home residence, your residential lease agreement must allow business use, and you must obtain your landlord's written consent if required. Alternatively, you can use a virtual office address, but the NTS may request an explanation of how a foreigner operates from that location.
- File the Application: You can apply online through the NTS web portal HomeTax → (requires a joint/financial certificate to sign in) or walk into any local district tax office (세무서 - Semuseo). In person, applications are typically processed within 20 minutes to 3 days.
- Open a Business Bank Account: Once you receive your business certificate (사업자등록증 - Saeopja Deungrokjeung), you must open a dedicated business bank account and register the account on HomeTax for your cash receipts and transactions.
Global Income Tax (종합소득세) & Progressive Brackets for 2026
Unlike corporate entities, sole proprietors do not pay corporate tax. Instead, all net business profits are treated as personal income. You are required to file a Global Income Tax return (종합소득세 - Jonghab sodeugse) every year between May 1st and May 31st for the earnings of the previous calendar year.
Korean tax rates are highly progressive (as of June 2026), ranging from 6% to 45%. Additionally, a mandatory 10% local income tax surcharge is added to the tax rate, making the actual tax rate range from 6.6% to 49.5%.
| Taxable Base Bracket (KRW) | Base Tax Rate | Effective Rate (with 10% Local Tax) |
|---|---|---|
| ₩14 Million or less | 6% | 6.6% |
| Over ₩14 Million ~ ₩50 Million | 15% | 16.5% |
| Over ₩50 Million ~ ₩88 Million | 24% | 26.4% |
| Over ₩88 Million ~ ₩150 Million | 35% | 38.5% |
| Over ₩150 Million ~ ₩300 Million | 38% | 41.8% |
| Over ₩300 Million ~ ₩500 Million | 40% | 44.0% |
| Over ₩500 Million ~ ₩1 Billion | 42% | 46.2% |
| Over ₩1 Billion | 45% | 49.5% |
As a sole proprietor, you must deduct your valid business expenses (such as rent, software subscriptions, device deprecation, and advertising) to reduce your overall taxable income base. Keeping accurate transaction ledgers (장부 - Jangbu) is mandatory to justify these deductions during the May tax return process.
Frequently Asked Questions (FAQ)
Can E-7 visa holders register a sole proprietorship in Korea?
E-7 visa holders can only register a sole proprietorship if they secure explicit, written employer approval and apply for an out-of-workplace activity permit from immigration before setting up the business. Without this official permit, running an independent business constitutes a major immigration violation.
Do I need a physical office space to register a Gaein Saeopja?
No, you can register using your home address if your residential lease agreement allows it, or utilize a virtual office provider. However, the NTS routinely audits foreign registrations using virtual addresses to verify that the business is actively operating and not a shell entity.
What happens to my business registration if my visa expires?
If your visa expires or is cancelled, your legal status to reside and operate in Korea ends. While the business registration certificate itself does not automatically delete, operating a business on an invalid visa is an illegal work violation. You must close the business or transfer ownership.
※ All information is based on 2026 statutory rates and official publications. Individual circumstances may vary. This is not professional financial, medical, or legal advice.