Illinois Sales Tax License Registration

Oct 27, 2025

If your business is operating in Illinois, it is important to understand the requirements for sales tax registration. Registering for sales tax in Illinois is necessary for businesses that sell tangible personal property or certain services in the state.

How to get a Illinois Sales Tax License

There is one sales tax setup task you may need to complete in Illinois to get your sales tax licence. You can follow the guide below to help you get registered directly with the Illinois agencies or use Mosey to do it.

Use Mosey to register for sales tax in Illinois.

Illinois Sales Tax Filing Requirements & Deadlines

There is one sales tax filing requirement & deadline you may need to complete in Illinois. You can follow the guide below or use Mosey to do it.

Illinois Purchase Sales Tax Exemption Setup for Corporation

If your nonprofit is organized and operated exclusively for charitable, religious, educational, or governmental purposes, you are eligible to apply for exemption on sales tax for purchases made by filing an Application for Sales Tax Exemption (STAX-1) online with the Illinois Department of Revenue. You will need to provide a copy of the organization's: (1) Articles of Incorporation or Organization, (2) By-laws, (3) IRS determination letter, and (4) Most recent financial statement for nonprofits that are not religious organizations. Note: The sales tax exemption may take up to 90 days to process and must be renewed every five years from the date of issue. If approved, you will be issued a tax-exempt number that begins with “E99” and is followed by six digits (E99XX-XXXX).

  1. File Application for Sales Tax Exemption

    File an Application for Sales Tax Exemption (STAX-1) online with the Illinois Department of Revenue.

Illinois Sales Tax Setup for PLLC, Professional Corporation, LLP, LLC, Corporation

Sales tax is imposed on a seller’s receipts from sales of tangible personal property for use or consumption in Illinois. For Illinois sales tax, an out-of-state business is determined to have nexus within the state if they maintain a place of business in Illinois. Contractors are generally exempt for the purpose of determining nexus if they do not engage in selling the retailer’s products or refer customers to the retailer. Businesses with contractors have to maintain a Retailer Agreement (which requires annual recertification each January 1) that outlines that solicitation in Illinois is prohibited. If you are subject to Illinois sales tax you must register with the Department of Revenue for a sales tax account.

  1. Register Sales Tax Account Online

    Register for a sales tax account using the Reg-1 New Business Registration application on MyTax Illinois. Mark "Done" if you have a sales tax account created during a previous tax registration.

Illinois Sales Tax Reporting for PLLC, Professional Corporation, LLP, LLC, Corporation

The Illinois Department of Revenue determines how often taxpayers must file their returns based on the initial registration and annual liability. You will be required to file and remit sales tax either monthly, quarterly, or annually. Businesses with an average monthly tax liability greater than $200 during the preceding four complete calendar quarters are required to file both monthly returns and quarterly returns. Businesses with an average monthly tax liability less than $200 but greater than $50 only need to file quarterly returns. Businesses that have an average monthly tax liability of less than $50, should only file an annual return. Monthly returns are due on the 20th day of the month following the month reported. Quarterly returns are due on the 20th day of the month following the quarter-end: April 20, July 20, October 20, and January 20. An annual return is due January 20th of the year following the year for which the return is filed. Note: Businesses that have an annual gross receipts average of $20,000 or more are required to electronically file relevant sales tax forms electronically and make quarter-monthly sales tax payments. Quarter-monthly payments are due on the seventh, 15th, 22nd, and the last day of the month.

  1. Files Sales Tax Return and Pay Taxes

    Businesses that are subject to the Illinois sales tax must fill out form ST-1, Sales and Use Tax and E911 Surcharge Return. All businesses can use MyTax Illinois to file and pay their sales taxes online.

Illinois's Sales Tax Registration & Reporting Agencies

Review your compliance risks, free.

More from the blog

Learn how to keep your business compliant in all 50 states across payroll, HR, Secretary of State, and tax.

Labor Laws for Commission-Only Employees: 16 Common Questions

Labor laws for commission-only employees can be challenging to understand, let alone follow. These laws affect industries where staff compensation is performance-based, like sales or real estate. To ensure a positive and healthy work experience, employers and employees must work together to build a system that promotes fair treatment and state compliance. In this guide from Mosey, we’re answering the 16 most common questions about commission-only employment.

Kaitlin Edwards | Dec 12, 2024

Liability Insurance: What Is It & FAQs Explained

Even the best-prepared business owners can’t plan for everything. Accidents, disagreements, and misunderstandings can have serious consequences for a business if the affected individual or group decides to pursue legal action. Liability insurance can prevent unforeseeable events from having financial consequences that may be devastating to your business. This is what business owners need to know about liability insurance and how they can use liability insurance to protect themselves.

Alex Kehayias | Mar 9, 2024

Texas Sick Leave Law 2024: An HR Guide for Texas Employers

Sick leave is an essential benefit. It lets employees rest and recover when they’re not feeling well. When your team can take time off to recuperate, they’re less likely to spread illness or experience burnout. After all, a well-rested employee is a productive employee. In this article, we’ll discuss sick leave laws in Texas in 2024, from public and private sectors to different leave types like parental leave. We’ll also share how Mosey can help manage state compliance.

Gabrielle Sinacola | Aug 17, 2024

Ready to get started?

Schedule a free consultation to see how Mosey transforms business compliance.