If your business makes taxable sales to customers in Kansas, you may need to register for a Kansas Retailer's Sales Tax Certificate before collecting sales tax. This 2026 guide explains who must register, what information you need, and how to complete the registration process through the Kansas Customer Service Center.
For broader information about Kansas sales tax rules, rates, and taxability, see the Kansas Sales Tax Guide. For details on filing deadlines and how to submit returns, see the Kansas Sales Tax Filing Guide.
Quick answers: Kansas sales tax registration
A quick overview of the authority, registration portal, nexus threshold, and other essentials for registering in Kansas.
| Fact | Detail |
|---|---|
| Authority | Kansas Department of Revenue |
| Registration portal | Kansas Customer Service Center |
| Economic nexus threshold | $100,000 in annual sales into Kansas (no transaction count threshold) |
| Registration fee | Free |
| Renewal period | No periodic renewal required |
Who must register for Kansas sales tax
You must register for a Kansas Retailer's Sales Tax Certificate 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 into Kansas in the current or previous calendar year, or;
- Has a physical presence in Kansas, such as an office, employee, warehouse, or inventory stored in the state.
Kansas uses a single dollar-amount threshold only. Unlike most states, Kansas has no separate transaction count threshold, the $100,000 sales figure is the only measure that triggers economic nexus.
Kansas also eliminated its small seller exception in 2021. Remote sellers are required to collect tax on all sales into Kansas once they cross the threshold, with no minimum purchase exemption.
Once you exceed the threshold, you should register before making further taxable sales in Kansas. If you're unsure whether your business has nexus, see the Kansas Sales Tax Guide for a broader explanation.
How to register for Kansas sales tax
Sellers can register online through the Kansas Customer Service Center, the state's centralized business services portal. 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 Kansas Retailer's Sales Tax Certificate, 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 Kansas
- Your business address and any Kansas locations, if applicable
Registration steps
Follow these steps to register for a Kansas Retailer's Sales Tax Certificate.
1. Create your online login
Set up your Kansas Customer Service Center account credentials.
- Choose a username and password
- Set up your security information
- This login is used for all future filings, payments, and account management
If you already have a Kansas Customer Service Center account, you can add a sales tax account to your existing login.
2. Provide your business information
Enter your business name, address, type of entity, and any Kansas locations.
- Remote sellers without a Kansas location should indicate they are selling remotely
- Kansas uses destination-based sourcing for remote sellers. You charge based on where the buyer is located
- Local city and county rates apply on top of the 6.5% state rate, so the combined rate depends on the buyer's location
3. No registration fee
Kansas does not charge a fee to register for a sales tax certificate. Registration through the Kansas Customer Service Center 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 Kansas Retailer's Sales Tax Certificate
Once approved, you will receive:
- Your Kansas Retailer's Sales Tax Certificate number (used for filing and payments)
- Your assigned filing frequency (monthly, quarterly, or annually, based on expected tax liability)
- Access to the Kansas Customer Service Center for filing, payment, and account management
What happens after registration
After registering, you must begin collecting Kansas sales tax on taxable sales and file returns based on your assigned filing frequency. Note that Kansas sales tax returns are due on the 25th of the month following the reporting period, different from the 20th deadline used by most other states.
Kansas taxes digital goods and SaaS. If you sell software or digital products to Kansas customers, you must collect and remit sales tax on those sales. See the Kansas Sales Tax Guide for details on taxability.
Local city and county taxes apply on top of the 6.5% state rate. The combined rate varies by buyer location, so accurate destination-based tracking is important for correct compliance.
➡ Learn more about Kansas sales tax rates, taxability, and nexus in the Kansas Sales Tax Guide
➡ See how to file and pay Kansas sales tax in the Kansas 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.
