How to Obtain Business Registration Certificate and Set Up Login Access via HomeTax
- FLip Korea
- Jun 17
- 5 min read
1. What is a 사업자등록증?
The 사업자등록증 is your official Business Registration Certificate, issued by the National Tax Service (NTS) in Korea. It’s legally required if you plan to:
Open a sole proprietorship, corporate or business
Freelance or earn non-salary income (online sales, consulting, etc.)
Issue tax invoices
File VAT or income taxes as a business entity
2. Required Documents for Business Registration
To register a business, prepare the following:
Required for | Documents |
Korean Citizen | 주민등록증 or 주민등록등본 |
Foreigner | ARC (Alien Registration Card), passport |
Address Verification | Lease agreement or property ownership |
Business Type | Website info, service list, logo if online |
Special cases (e.g. food service, imports) may need permits or licenses.
3. How to Apply for a 사업자등록증 via HomeTax (개인사업자 Individual business owner)
You can apply online through HomeTax (no need to visit the tax office):
Step-by-Step:
Step 1: Visit HomeTax
Step 2: Login
Click 로그인Use a personal digital certificate (개인용 공동인증서)— If you don’t have one yet, see the “Login Certificate” section below.
Step 3: Navigate to Business Registration
Go to:
[민원증명] → [사업자등록 신청/정정] → [사업자등록 신청]
Or search for "사업자등록 신청" in the search bar.
Step 4: Fill in the Business Info
Choose 사업자 유형: 개인사업자 (Individual Proprietor)
Business name, address, type of business (업태/종목)
Upload supporting documents (PDF/JPG)
Step 5: Submit and Wait
Submit your form
Processing time: typically 3–5 business days
You’ll receive confirmation via the My NTS inbox (내문서함)
4. How to Download 사업자등록증 (PDF) (works for all)
Once approved, download the certificate:
Steps:
Go to 민원증명 (Certificate Issuance)
Click 사업자등록증명 발급
Enter the required date range
Choose “출력” or “PDF 저장”
You can now use it to open business bank accounts, register marketplaces, etc.
How to Issue a Business Login Certificate (공동인증서)
Once your business is registered, you need a 사업자용 공동인증서 (business-use digital certificate) to:
Log in to HomeTax as a business
File taxes
Issue tax invoices
Access payment and refund records
Options to Obtain:
Method | How |
Bank | Visit with ARC, 사업자등록증, and personal ID |
Certificate Authority Website | KFTC, KICA, CrossCert, etc. |
Mobile App | Many providers offer 인증서 registration via mobile |
Required Info:
사업자등록번호 (Business Reg. No.)
대표자 이름 (Owner Name)
Date of birth / ID verification
인증서 비밀번호 (new password to set)
6. How to Use the Business Login on HomeTax
Click 로그인
Choose 공동인증서 로그인
Select the 사업자용 인증서
Enter your certificate password
Once inside, you can:
Issue 전자세금계산서 (e-Tax invoices)
File VAT and 종합소득세
Request 납세증명서 (Tax clearance)
7. What If You Don’t Have a Card Reader or USB?
If you don't have physical storage for the 인증서:
Use 클라우드 인증서 (Cloud Certificate) storage
Or install the 인증서 on your smartphone using provider apps
For card login (e.g. 사업자용 보안토큰), you'll need:
The NPKI card/token from issuing bank
A USB reader or secure access device
Credit: policy.xouga.com
What is 사업자용 보안토큰?
The 사업자용 보안토큰 (Business Security Token) is a USB-type device or smartcard that stores your 사업자용 공동인증서 (business-use digital certificate). It provides a hardware-based secure login method used for:
Accessing HomeTax as a business
Filing VAT or 종합소득세
Issuing tax invoices (전자세금계산서)
Enhanced security for business owners and accountants
This is especially common for corporate businesses (법인) and sole proprietors handling large amounts of transactions.
Types of 보안토큰
Type | Description |
USB Token | Plugs into your PC to store the 인증서 |
Smartcard + Reader | Chip-based card inserted into a USB reader |
Secure Token (HSM) | Advanced encryption, mostly for corporate use |
How to Get a 사업자용 보안토큰
You can apply through:
1. Bank (Recommended)
Visit your corporate bank branch
Bring:
사업자등록증 (Business Registration Certificate)
대표자 신분증 (Your ID/ARC)
Business stamp/seal (도장)
You’ll receive:
A physical token (USB or smartcard)
Instructions to install drivers and use with HomeTax
2. Certificate Authorities
Such as:
KFTC 공동인증센터 (https://www.signgate.co.kr)
CrossCert, KICA, NICEThey offer online and offline issuance of 보안토큰 and compatible 인증서
How to Use the 보안토큰 with HomeTax
Step-by-Step:
Plug in your 보안토큰 (USB or reader)
Click 로그인 > Select 공동인증서 로그인
Choose 사업자용 인증서 from the 보안토큰
Enter the 인증서 비밀번호 (not your PC password)
Complete login → you now have access to full business tax services
Installation & Setup Tips
Install 보안토큰 드라이버 (drivers), typically provided by the issuing bank or CA
Make sure to allow browser plugins for the 인증서 system (often uses ActiveX or EXE)
Use Internet Explorer or Edge in IE mode for compatibility if needed
How to Reissue or Replace a 보안토큰
Situation | What to Do |
Lost/Stolen Token | Report to issuing authority → Reissue required |
Forgot Password | Visit issuer with ID to reset |
New Business Info | Re-register or update the 인증서 at the issuer |
Combine With 사업자등록증 Setup
Once your 사업자등록증 is approved and your 공동인증서 is issued to your 보안토큰:
You are ready to:
Log in securely as a business
File VAT (부가세) and 종합소득세
Issue 세금계산서
Download 납세증명서 (tax payment certificate)
Where Does the 보안카드 Come In?
While HomeTax doesn’t directly use 보안카드 for tax invoice issuance, it becomes essential during authentication and payment processes, such as:
Action | Is 보안카드 Required? |
Logging into HomeTax | No – 공동인증서/보안토큰 is used |
Issuing a tax invoice | Not directly |
Registering your business bank account for refunds or automated invoice data submission | Yes – for verifying account ownership via bank |
Linking bank-issued 공동인증서 or payment certificates to HomeTax | Yes – bank authentication often uses 보안카드 |
Paying penalties, late fees, or VAT via linked account | Yes – 보안카드 may be used to verify the transaction |
Example: Secure Workflow Involving 보안카드
You log into HomeTax using your 사업자용 공동인증서
You go to 전자세금계산서 발급 → 세금계산서 작성
Fill in buyer, product, and amount details
When you submit the invoice, your HomeTax 인증서 is used, but if the system auto-links to your bank for account verification, you might be asked to:
Authenticate with 보안카드
Or use a mobile OTP app, if you replaced the card
How to Get or Use a 보안카드 for e-Invoice Authentication
Steps:
Visit your business bank (e.g., KB, Shinhan, Hana, etc.)
Request a 보안카드 for online certificate authentication
Register it with your business bank account used in HomeTax
When prompted during sensitive actions (tax refunds, linking accounts, etc.), enter coordinates from the 보안카드
💡 Many banks now recommend OTP tokens or mobile OTP apps instead of 보안카드.
보안카드 vs 보안토큰 in 전자세금계산서
Feature | 보안카드 | 보안토큰 |
Bank account link | Yes | No |
Certificate storage | No | Yes |
Invoice authentication | Not directly | Yes |
Required for login | No | (if 인증서 is stored inside) |
Security Tips
Do not photograph or store your 보안카드 info digitally
If lost, visit the bank to reissue immediately
Consider upgrading to a mobile OTP for stronger security and convenience
Summary: What You Need to Fully Operate on HomeTax
Item | Purpose |
사업자등록증 | Legal business ID |
공동인증서 | Secure login |
보안토큰 | Physical certificate storage |
보안카드 | Bank-level security for payments |
HomeTax Access | Filing taxes, invoice issuance, downloads |
Troubleshooting
Issue | Solution |
인증서 안 보임 | Install 보안프로그램 via HomeTax login page |
인증서 등록 실패 | Try issuing through your bank or different browser |
등록증 지연 | Call local tax office or check My NTS inbox |
로그인 실패 | Reinstall ActiveX and try IE/Edge compatibility mode |
Troubleshooting Tips
Problem | Fix |
인증서 not showing | Reinstall browser security modules |
보안토큰 not detected | Try different USB port / reinstall drivers |
Forgot 보안카드 location | Reissue at your bank |
Login fails | Use Internet Explorer or Edge compatibility mode |
Support for Foreigners
NTS Help: 1588-0560 → Press 7 for English
Seoul Global Center: Walk-in support for business setup
Local 세무서 (tax office): Accepts walk-ins with ID and ARC
Comments