Business registration status lookup
Enter a business registration number to check its status with the National Tax Service. The result shows whether the business is active, suspended, or closed, along with its tax type. Free and no sign-in required.
- Last verified
- 2026-09-24
- Official source
- National Tax Service business registration status data
- Privacy
- The number is used only for the National Tax Service lookupPrivacy policy (Korean) (opens in a new tab)
How to read the result
A business registration status comes back as one of four results.
Active
The business registration is live with the National Tax Service. The result also shows the tax type, such as general taxpayer, simplified taxpayer, or tax-exempt business.
Suspended
The business has paused. Its registration remains, and no tax type is shown.
Closed
The business registration has been canceled. The result includes the closing date, and you cannot exchange tax invoices with a closed business.
Not registered
This is not a business registration number known to the National Tax Service. Check the digit count and typos first.
To check many counterparties at once, look up to 100 numbers per request with the API. See the Business registration status API
What this lookup covers
Last verified 2026-09-24
What this covers
- Looks up business registration numbers registered with the National Tax Service. Resident registration numbers and corporation registration numbers cannot be looked up.
- Tax type appears only for active businesses. The National Tax Service does not provide it for suspended or closed businesses.
- The business registration number you enter is used only for the National Tax Service lookup, and the result is kept so the next lookup of the same number can reuse it.
- Treat the result as a reference. Before issuing a tax invoice or signing a contract, re-check the original registration certificate or Hometax.
Official sources
- View the official source (Korean) (opens in a new tab)
National Tax Service business registration status data
Last verified 2026-09-24
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02FAQ
About the Business registration status lookup
Is the business registration status lookup free?
Yes. It is free and requires no sign-in. It checks one number at a time.
How is this different from the Hometax lookup?
It reads the same data the National Tax Service provides. You enter only the number instead of opening Hometax. If the results differ, re-check on the Hometax business registration status screen.
How current is the result?
It is based on National Tax Service registration data. A business registered or closed today does not appear right away.
What is the difference between suspended and closed?
Suspended means the business has paused but its registration is still active. Closed means the registration has been canceled. You cannot exchange tax invoices with a closed business.
Can I tell whether the business is a general or simplified taxpayer?
For an active business the result includes the tax type. It shows the National Tax Service wording as-is, such as 일반과세자 (general taxpayer), 간이과세자 (simplified taxpayer), or 면세사업자 (tax-exempt business).
Does it show the closing date?
If the business is closed, the closing date is shown. Active and suspended businesses have no closing date.
Can I find the business name or representative from the number?
No. The National Tax Service status lookup returns only the status and tax type for a number, not the business name or representative.
Can I check dozens of counterparties at once?
This tool checks one at a time. To check many counterparties at once, use the Business registration status API to look up to 100 numbers per request. Register counterparties in Bolta and their status is checked once on registration and again when you issue a tax invoice.
How is the number I enter used?
It is used only for the National Tax Service lookup. The number and result are kept so the next lookup of the same number can reuse them.
Register a counterparty and Bolta checks its status for you
Bolta checks the National Tax Service registration status once on registration and again when you issue a tax invoice.