What a Kentucky Sales Tax Number Is and Who Needs One

A Kentucky sales tax number—officially called a sales tax permit—is a registration number issued by the Kentucky Department of Revenue that allows you to collect sales tax from customers and send it to the state. You need one if you sell tangible goods (physical products) or certain services in Kentucky, whether you operate a brick-and-mortar store, sell online, or work from home.

The permit itself is free. You do not pay a fee to register. Once you have the number, you become responsible for collecting the correct tax rate from customers and filing returns with the state on a schedule the Department of Revenue assigns to you—usually monthly, quarterly, or annually depending on your sales volume.

If you are unsure whether your business type requires a permit, the Kentucky Department of Revenue website lists which activities are taxable. Services like consulting, accounting, or landscaping are generally not taxable in Kentucky, but selling merchandise, food, or prepared meals is. When in doubt, registering does not hurt—the process takes about 15 minutes online.

Key Takeaways

  • You register for a Kentucky sales tax permit online through the Department of Revenue's website at revenue.ky.gov, not by mail or phone.
  • You will need your Social Security number or federal Employer Identification Number (EIN), your business address, and the date you plan to start selling.
  • Registration is when ready—you receive your permit number when ready after completing the online form, and you can begin collecting tax right away.
  • The permit is tied to a specific business location and business structure, so opening a second location or changing from sole proprietor to LLC requires a separate registration.
  • Kentucky does not require you to renew your permit annually; it remains active as long as you are in business and filing returns on time.

Register Online Through the Kentucky Department of Revenue

The Kentucky Department of Revenue handles all sales tax registrations online. Go to revenue.ky.gov and look for the "Register for a Sales Tax Permit" link, usually found under the "Businesses" or "Register" section. You will be directed to the state's online registration system.

The form asks for basic information: your name, business name, business address, the type of business you operate, your Social Security number or EIN, and the date you plan to begin sales. Have these details ready before you start. The entire process takes 10 to 15 minutes, and you do not need to print, sign, or mail anything.

After you submit the form, the system generates your permit number when ready. Write it down or take a screenshot—you will need it to file tax returns and to provide to suppliers or other businesses that ask for proof you are registered. Some businesses also receive a printed permit in the mail within one to two weeks, but the number itself is valid as soon as you see it on screen.

What Information You Will Need Before You Start

Gather these items before you open the registration form. Having them ready prevents you from getting stuck mid-process and having to start over.

You will need either your Social Security number (if you are a sole proprietor) or your federal Employer Identification Number (EIN, if you have formed an LLC, corporation, or partnership). If you do not have an EIN yet and you need one, you can obtain it free from the IRS at irs.gov before registering with Kentucky, though many sole proprietors use their Social Security number instead.

You also need your business address—the physical location where you will be selling or storing inventory. A home address is acceptable if you operate from home. You will need the date you plan to start selling, which can be today or a future date. Finally, have your business structure type ready (sole proprietor, LLC, corporation, partnership, etc.), because the form asks you to select it from a list.

Separate Permits for Multiple Locations or Business Changes

If you operate more than one physical location—such as two retail stores or a store plus a warehouse—Kentucky requires a separate sales tax permit for each location. You cannot use one permit number for multiple addresses. Register each location individually through the same online system.

If you change your business structure—for example, converting from a sole proprietorship to an LLC—you may need to register again. The same applies if you change your business name or move to a new address. Contact the Kentucky Department of Revenue at (502) 564-4581 to confirm whether your situation requires a new registration or if you can update your existing permit.

Changing ownership of an existing business also requires a new registration under the new owner's name and tax ID. The previous owner's permit becomes inactive once the sale is complete.

What Happens After You Receive Your Permit Number

Once you have your permit number, you are legally required to collect sales tax from customers at the rate set for your county. Kentucky's state sales tax rate is 6 percent, but some counties add a local tax, bringing the total to 6 percent or higher. The Department of Revenue website shows the combined rate for each county.

You must file a sales tax return with the state on a schedule assigned to you based on your expected sales volume. Most new businesses start on a monthly filing schedule, meaning you file and pay once per month. As your sales grow or shrink, the Department of Revenue may change your schedule to quarterly or annual filing. You file returns online through the same system where you registered.

Keep records of all sales, tax collected, and expenses for at least three years. The Department of Revenue can audit your business at any time, and having organized records protects you if questions arise.

If You Operate Online or Ship to Kentucky Customers

If you sell online and ship products to Kentucky customers, you need a Kentucky sales tax permit even if you do not have a physical location in the state. This applies whether you operate your own website, sell through a marketplace like Amazon or eBay, or take orders by phone or email.

The registration process is the same. Use your home address or your business address as your location, and register online through the Department of Revenue. You will collect and remit Kentucky sales tax on all orders shipped to Kentucky addresses.

If you also sell to customers in other states, those states may have their own sales tax requirements. Kentucky's permit covers only Kentucky sales. You may need to register separately in other states depending on your sales volume there and that state's rules.

Common Mistakes to Avoid

Do not wait until after you start selling to register. Register before your first sale so you are collecting the correct tax from day one. If you collect sales without a permit and the Department of Revenue discovers it, you may face penalties and back taxes.

Do not assume one permit covers multiple locations. Each address needs its own registration. Do not confuse a sales tax permit with a business license—Kentucky requires both, and they are separate registrations. A business license comes from your city or county, while the sales tax permit comes from the state.

Do not forget to file returns on time, even if you had no sales that month. Missing a filing important date can result in penalties and interest charges. If you cannot file by the due date, contact the Department of Revenue to request an extension before the important date passes.

Frequently Asked Questions

Do I need a sales tax permit if I sell services instead of products?

Most services in Kentucky are not subject to sales tax, so you would not need a permit. However, some services—such as prepared food, pest control, or certain repairs—are taxable. Check the Department of Revenue's list of taxable services on revenue.ky.gov, or call (502) 564-4581 to confirm whether your specific service is taxable before registering.

How long does it take to get approved after I explore online?

Your permit number is issued when ready when you submit the form online. You can begin collecting tax when ready. A printed permit may arrive in the mail within one to two weeks, but you do not need to wait for it—the number you receive on screen is valid right away.

What if I close my business—do I need to cancel my permit?

Yes. Contact the Kentucky Department of Revenue at (502) 564-4581 or through their website to notify them that you are closing. File a final sales tax return for the period through your closing date. Canceling prevents you from receiving notices for future filing periods and protects you from penalties for missed important date.

Can I register by phone or mail instead of online?

No. Kentucky only accepts sales tax permit registrations through their online system at revenue.ky.gov. The online process is the fastest and most direct way to get your permit number. If you have trouble with the website, call (502) 564-4581 for technical support.

Do I need a separate permit if I sell on multiple platforms like Amazon and my own website?

No. One Kentucky sales tax permit covers all your sales channels—your website, Amazon, eBay, or any other platform—as long as you are operating under the same business name and structure. You file all sales on a single return.