If your business makes taxable sales to customers in Kentucky, you may need to register for a Kentucky sales tax permit before collecting tax. This 2026 guide explains who must register, what information you need, and how to complete the registration process.
For broader information about Kentucky sales tax rules, rates, and taxability, see the Kentucky Sales Tax Guide. For details on filing deadlines and how to submit returns, see the Kentucky Sales Tax Filing Guide.
Quick answers: Kentucky sales tax registration
A quick overview of the authority, registration portal, nexus threshold, and other essentials for registering in Kentucky.
| Fact | Detail |
|---|---|
| Authority | Kentucky Department of Revenue |
| Registration portal | Kentucky Taxpayer Portal |
| Economic nexus threshold | $100,000 in annual sales or 200 separate transactions into Kentucky |
| Registration fee | $0 — registration is free |
| Renewal period | No periodic renewal required |
Who must register for Kentucky sales tax
You must register for a Kentucky sales tax permit if your business has a sales tax nexus in the state. This usually applies when a business:
- Exceeds the economic nexus threshold of $100,000 in annual sales or 200 or more separate transactions into Kentucky in the current or previous calendar year, or;
- Has a physical presence in Kentucky, such as an office, employee, warehouse, or inventory stored in the state.
Kentucky's dual threshold means you must register once you cross either the dollar amount or the transaction count, whichever comes first.
Important note for SaaS businesses: Kentucky expanded its sales tax base effective January 1, 2023 under House Bill 8 to include many digital services, including SaaS. If you sell SaaS to Kentucky customers and exceed the nexus threshold, you must register and collect Kentucky sales tax.
Once you exceed the threshold, you should register before making further taxable sales in Kentucky. If you're unsure whether your business has nexus, see the Kentucky Sales Tax Guide for a broader explanation.
How to register for Kentucky sales tax
Sellers can register online through the Kentucky Taxpayer Portal, operated by the Kentucky Department of Revenue. This is the same portal you will use to file returns and make payments after registration.
Information you need before registering
Before applying for a Kentucky sales tax permit, have this information ready:
- Your Social Security number (if registering as a sole proprietor with no employees)
- Your Employer Identification Number (EIN), if your business has one (required for corporations, partnerships, and most LLCs)
- North American Industry Classification System (NAICS) code for your primary business activity
- The date of your first sale in Kentucky
- Your business address and any Kentucky locations, if applicable
Registration steps
Follow these steps to register for a Kentucky sales tax permit.
1. Create your online login
Set up your Kentucky Taxpayer Portal account credentials.
- Choose a username and password
- Set up your security information
- This login is used for all future filings, payments, and account management
2. Provide your business information
Enter your business name, address, type of entity, and any Kentucky locations.
- Remote sellers without a Kentucky location should indicate they are a remote seller
- Kentucky uses destination-based sourcing — you charge based on where the buyer is located
- Kentucky has a flat 6% statewide rate with no local sales taxes
3. Application fee
Kentucky does not charge a fee to register for a sales tax permit. Registration is free.
4. Submit your application
Review your entries and submit the application.
- You will receive an on-screen confirmation after submission
- A confirmation email is typically sent shortly after submission
5. Receive your Kentucky sales tax permit
Once approved, you will receive:
- Your Kentucky sales tax account number (used for filing and payments)
- Your assigned filing frequency (monthly, quarterly, or annually, based on expected tax liability)
- Access to the Kentucky Taxpayer Portal for filing, payment, and account management
What happens after registration
After registering, you must begin collecting Kentucky sales tax on taxable sales and file returns based on your assigned filing frequency. Kentucky's flat 6% statewide rate applies uniformly — there are no local rates to track. Electronic filing is required in Kentucky since May 2025.
Kentucky taxes SaaS and many digital services under the 2023 House Bill 8 expansion. Zero returns are required even in periods with no taxable sales. See the Kentucky Sales Tax Guide for the full taxability picture.
➡ Learn more about Kentucky sales tax rates, taxability, and nexus in the Kentucky Sales Tax Guide
➡ See how to file and pay Kentucky sales tax in the Kentucky Sales Tax Filing Guide
Note: At Quaderno we love providing helpful information and best practices about taxes, but we are not certified tax advisors. For further help, or if you are ever in doubt, please consult a professional tax advisor or the local tax authorities.
Need help registering across multiple states?
Watch our webinar: US Sales Tax Registration & Filing Tips + AMA. Learn how international sellers register, file, and manage US sales tax compliance across multiple jurisdictions.
Note: At Quaderno we love providing helpful information and best practices about taxes, but we are not certified tax advisors. For further help, or if you are ever in doubt, please consult a professional tax advisor or the tax authorities.
