Country Guide
EIN for South Korean Entrepreneurs
Apply for your US EIN from South Korea without an SSN or ITIN. ein.so handles the IRS fax filing for Korean freelancers, Amazon sellers, and tech founders. $49 Standard. $97 Express.
Last updated: June 2, 2026
South Korean entrepreneurs can get a US EIN by submitting IRS Form SS-4 by fax. Your South Korea passport number replaces the SSN requirement on Line 7b. The IRS online tool is blocked for applicants without an SSN, so the fax method is your path. ein.so prepares your SS-4, faxes it to the IRS, and delivers your EIN by email. Standard processing costs $49 (4-7 business days). Express costs $97 (2-3 business days).
South Korea is one of Asia's largest economies, with a GDP near $1.7 trillion and a population of 52 million. Korean founders build for the US market across many sectors: K-beauty and skincare brands, gaming and app studios, Amazon and Shopify sellers, content creators, and SaaS startups invoicing American clients. Every one of them needs a US EIN to operate a US business entity. This guide explains how South Korean applicants get an EIN without an SSN, how to complete Form SS-4, and how to set up US banking, payments, and tax compliance after approval.
| Factor | South Korea | United States |
|---|---|---|
| Common entity | Sole proprietor / Co., Ltd. (Jusik Hoesa) | LLC / Corporation |
| Business ID | BRN (10 digits) | EIN (XX-XXXXXXX) |
| Tax authority | National Tax Service (NTS) | IRS |
| VAT / sales tax | VAT (standard 10%) | State sales tax (varies) |
| Currency | South Korean Won (KRW, ~0.00075 USD) | USD |
| Online EIN tool | Not available (no SSN) | Requires SSN |
Use Cases
Why Do South Korean Entrepreneurs Need a US EIN?
South Korean entrepreneurs need a US EIN because a US LLC cannot open a bank account, accept US payments, or file US taxes without one. The EIN is the 9-digit federal tax ID that links your Korea-owned company to the US financial system.
South Korea's strong export sectors in beauty, gaming, electronics, and digital content push founders toward the US, where customers, payment processors, and capital concentrate. Here are the most common reasons Korean applicants come to ein.so.
K-Beauty and E-commerce
SaaS, Gaming, and App Studios
Freelancers and Consultants
Content Creators and Digital Products
Step-by-Step
How Do South Korean Citizens Apply for a US EIN?
South Korean citizens submit IRS Form SS-4 by fax to 855-215-1627, using a South Korea passport number in place of an SSN. The IRS online tool requires an SSN, so the fax method is the only path for Korean applicants. The IRS issues most correctly filed EINs within 4-7 business days.
Form Your US LLC
Gather Your Documents
Complete Form SS-4
Submit by Fax and Receive Your EIN
South Korea-Specific SS-4 Field Guide
| SS-4 Field | South Korean Entry |
|---|---|
| Line 1 (Legal name) | Your US LLC name |
| Line 4 (Address) | Your Korean address (road name, building, postal code) |
| Line 7a (Responsible party) | Your full name as on your passport |
| Line 7b (SSN/ITIN/EIN) | Your South Korea passport number |
| Line 10 (Reason) | Started new business |
| Line 16 (Principal activity) | E.g., "e-commerce," "software," "consulting" |
The most common Korean rejection cause is address formatting. The road-name (doro) system and 5-digit postal code do not map cleanly to the SS-4 layout, and the IRS rejects malformed international addresses without notice. ein.so reformats Korean addresses to an IRS-accepted style. See the complete EIN application process and the EIN without SSN guide.
Processing Time & Cost
How Long Does an EIN Take and What Does It Cost From South Korea?
A South Korean applicant receives an EIN in 4-7 business days with ein.so Standard ($49) or 2-3 business days with Express ($97). The IRS charges $0 for the EIN itself. The fee covers SS-4 preparation, address reformatting, fax filing, and email delivery of your assignment letter.
The IRS online EIN tool delivers an EIN instantly, but it requires a US SSN or ITIN. Korean applicants without an SSN cannot use it. The fax method is the reliable route, and ein.so manages the entire filing for you.
| Method | Cost | Time | SSN Needed |
|---|---|---|---|
| ein.so Standard | $49 | 4-7 business days | No |
| ein.so Express | $97 | 2-3 business days | No |
| DIY fax to IRS | $0 | 4-7 business days | No |
| DIY phone (267-941-1099) | $0 | Same day, long hold | No |
| IRS online tool | $0 | Instant | Yes |
The DIY phone line is open during US business hours, which fall in the late evening and overnight in South Korea. International call charges and IRS hold times make this option costly for Korean applicants. The fax method avoids time-zone problems entirely. See the EIN cost breakdown and EIN processing time guide for full detail.
Banking & Payments
How Do South Korean Entrepreneurs Use Their EIN for US Banking and Payments?
South Korean entrepreneurs use their EIN to open a US business bank account and connect US payment processors, which together give a Korea-owned LLC full access to the dollar economy. Mercury and Relay approve most Korean LLC owners remotely within a few business days.
US Business Bank Account
Stripe on a US Entity
PayPal and Payoneer
Wise for KRW Transfers
Together, a US LLC, an EIN, and a US bank account let you invoice American clients in dollars, accept card payments, and repatriate profits to your Korean bank when the exchange rate works in your favor.
Tax Considerations
What Should South Korean Entrepreneurs Know About US and Korean Taxes?
A single-member US LLC owned by a South Korean resident is usually a disregarded entity for US federal income tax, meaning the LLC itself pays no US federal income tax on non-US-sourced income. You still owe Korean tax on the income under NTS rules, and you must file a US information return each year.
US Filing: Form 5472 + 1120
Korean Reporting to NTS
US-Korea Tax Treaty
BOI Report to FinCEN
ein.so handles the EIN application and does not provide tax advice. Work with a Korean tax accountant and a US CPA familiar with non-resident matters. Your EIN is the starting point for US tax compliance, not the end of it. Confirm all tax specifics with a CPA. See our EIN without SSN guide and EIN for non-residents.
Comparison
Is a US EIN Different From a South Korean BRN?
A US EIN is completely different from a South Korean BRN, and one cannot substitute for the other. The BRN is a 10-digit number from the National Tax Service for Korean tax purposes. The EIN is a 9-digit number from the IRS for US tax purposes.
If you run both a Korean business and a US LLC, you hold both numbers at once. The BRN identifies your Korean entity to the NTS. The EIN identifies your US entity to the IRS, US banks, and US payment processors.
| Attribute | South Korean BRN | US EIN |
|---|---|---|
| Issuer | National Tax Service (NTS) | IRS |
| Format | 10 digits | XX-XXXXXXX (9 digits) |
| Used for | Korean tax and invoicing | US tax, banking, payments |
| Cost | Free | $0 from IRS; $49 via ein.so |
| Valid in the US | No | Yes |
| SSN required | No | No (passport on Line 7b) |
Korean founders entering the US market need the EIN regardless of any BRN they hold. The two systems do not connect. Start your US EIN application separately. See how to get an EIN for the full process.
Next Steps
After Getting Your EIN From South Korea
- Open a US bank account — Mercury, Relay, and Wise accept non-resident LLC owners
- File your BOI report — required for most LLCs, free at fincen.gov/boi
- Set up payments — connect your EIN to Stripe, PayPal, or Payoneer
- File Form 5472 — annually for foreign-owned LLCs ($25,000 penalty for non-filing)
- Sell on US platforms — Amazon, Shopify, Etsy
Other country guides: India | UK | Japan | Canada | Philippines | Pakistan. Browse all on EIN for non-residents.
Frequently Asked Questions
Can South Korean citizens get a US EIN without visiting America?
Yes. South Korean citizens apply for a US EIN entirely from South Korea. The IRS does not require you to be present in the United States. You submit Form SS-4 by fax using your South Korea passport number on Line 7b. ein.so handles the full process remotely for $49 Standard or $97 Express.
Do I need an SSN or ITIN to get an EIN from South Korea?
No. South Korean applicants do not need an SSN or ITIN. Your South Korea passport number serves as your identification on Form SS-4 Line 7b. The IRS online EIN tool requires an SSN, so Korean applicants must use the fax method that ein.so files for you.
How long does it take for a South Korean applicant to receive an EIN?
Through ein.so, Standard processing takes 4-7 business days for $49 and Express takes 2-3 business days for $97. The DIY fax method takes 4-7 business days when the form is error-free. Calling the IRS from South Korea means international calls during US business hours with long hold times.
What is the EIN equivalent in South Korea?
The closest South Korean equivalent is the Business Registration Number (BRN), a 10-digit identifier issued by the National Tax Service (NTS). The BRN has no standing in the United States. You need a separate US EIN to run a US business entity, open a US bank account, and file US returns.
Can South Korean freelancers use a US LLC and EIN?
Yes. Many South Korean freelancers and consultants form a US LLC to invoice US clients in dollars, access US payment rails, and present a US business identity on contracts. The US LLC and EIN sit alongside your Korean tax registration; you continue to declare income in South Korea under NTS rules.
Can I sell on Amazon.com from South Korea with an EIN?
Yes. Amazon requires a US tax identification number to complete the seller tax interview on Amazon.com. South Korean sellers use their US EIN to register through their US LLC, access FBA warehouses in the US, and reach American customers without a US Social Security Number.
Can I open a US bank account from South Korea with an EIN?
Yes. With your EIN, LLC formation documents, and passport, you can open accounts at Mercury, Relay, and Wise remotely from South Korea. Some traditional banks require an in-person visit. Your EIN is the first requirement, so the bank can verify the LLC has a federal tax ID before opening the account.
Does ein.so support South Korean applicants with address formatting?
Yes. South Korean addresses use a road-name (doro) system with a 5-digit postal code that does not map cleanly to the SS-4 fields. The IRS silently rejects malformed international addresses. ein.so reformats your Korean address to an IRS-accepted style so your application is not rejected without notice.
How much does an EIN from South Korea cost?
The IRS charges $0 for an EIN. ein.so charges $49 for Standard service (4-7 business days) or $97 for Express service (2-3 business days). The fee covers SS-4 preparation, address reformatting, fax filing to the IRS, and email delivery of your EIN assignment letter. See the EIN cost page for details.
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