How do I get a joint certificate for electronic tax invoices from Industrial Bank of Korea?
How do I get a joint certificate for electronic tax invoices from Industrial Bank of Korea?
2026. 4. 14.
To obtain a joint certificate for electronic tax invoices from Industrial Bank of Korea (IBK), you can follow these steps:
Access IBK Corporate Internet Banking: Log in to the IBK corporate internet banking website as a corporate customer.
Navigate to the Certificate Center: Find and select the 'Certificate Center' or a similar option.
Apply for a Joint Certificate: Choose the option to issue or re-issue a 'Joint Certificate for Electronic Tax Invoices' (전자세금계산서용 공동인증서).
Agree to Terms and Conditions: Review and agree to the relevant terms and conditions.
Enter Business Information: Provide your business registration number and business account number.
Authentication: Enter your account password and OTP (One-Time Password) serial number. The specific OTP serial number location will depend on whether you use a token or card-type OTP.
Select Certificate Type: Choose the 'Electronic Tax Certificate' (전자세금용) option, which typically costs 4,400 KRW. Avoid the general-purpose certificate (110,000 KRW) unless you need it for other purposes.
Enter Contact Information: Input your phone number and optionally, your email address.
Confirm Fee Deduction: Confirm that the fee will be deducted from your designated account.
Save the Certificate: Select a location to save the certificate and set a password for it.
Copy to Smart Device (Optional): You may have the option to copy the certificate to your smart device.
Important Considerations:
A financial-use joint certificate (금융용 공동인증서) cannot be used to issue electronic tax invoices. You need a dedicated electronic tax invoice joint certificate.
If you have multiple business locations, you will need a separate joint certificate for each business registration number.
If you do not have corporate internet banking set up, you will need to visit an IBK branch to apply for it first, and then proceed with the certificate issuance.
Alternatively, if obtaining a joint certificate is difficult, you can apply for a security card at a tax office to issue electronic tax invoices via Hometax or phone ARS. Since February 2021, the mobile app 'Sontax' also allows issuance using biometric authentication without a joint certificate or security card.
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