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!!icon.pngIt may take up to three weeks to process paper Tax Registration Applications (Form 10A100) that have been mailed, faxed, or emailed to the department.  For faster processing, please apply for your business tax account numbers online at

​​​​​​Register or Reinstate a Business

Step 1: Legally Establish Your Business

Note: Sole Proprietorships & General Partnerships should contact the County Clerk where the business is located. All other business structures should register with the Kentucky Secretary of State, on the Kentucky Business OneStop Portal.

Step 2: Obtain Your Federal Employer Identification Number (FEIN) from the IRS.

  • Click here to access the Internal Revenue Service webpage.

Step 3: Register for Tax Accounts and the Commonwealth Business Identifier (CBI).

Commonwealth Business Identifier (CBI): A unique, ten-digit, number assigned to all Kentucky businesses. The CBI allows the business to be easily identified by all state agencies that utilize the Kentucky OneStop Portal.

  • Complete the online registration via the Kentucky Business OneStop portal. Click here to access the online portal.

Note: For assistance with registering your business on the Kentucky Business OneStop portal, contact the OneStop Help Line at (502) 564-5053.

Step 4: If necessary, complete the specialty applications below:

Step 5: Register with other State, County, and Local Governments as appropriate for your business.

  • For information on County and Local Governments click here.

Step 6: To Reinstate Business Tax Accounts or to Apply for Additional Accounts, click here.

  • For additional information on registering for additional tax accounts, click here.
  • For additional information on reinstating an account, click here.


Business Registration

Download the Taxpayer Bill of Rights

The Kentucky Department of Revenue conducts work
under the authority of the Finance and Administration Cabinet.

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