Last verified: 23/09/2026
Illinois at a glance
This guide explains Business License requirements in Illinois, including eligibility, documents, application steps, testing, fees and renewal.
How Business Licensing Works
<p>Businesses conducting business in Illinois or with Illinois customers generally need to determine whether IDOR registration is required. Local and industry licensing requirements must also be checked before operating.</p>
Costs, timing and validity
Illinois does not issue one universal business license for every business. Businesses may need Illinois Department of Revenue tax registration, Secretary of State entity registration, local licenses and permits, and industry-specific state credentials.
Illinois Department of Revenue business registration has no general registration fee. Individual licenses, local business licenses and regulated permits can have separate fees.
Renewal depends on the specific license or registration. Illinois tax registration generally continues while the account remains active, while professional and local licenses have their own renewal requirements.
There is no universal validity period. The term and renewal date depend on the license, permit or tax account.
Documents and information to prepare
Use the official checklist linked on this page as the final authority. The items below describe the information this state commonly expects for this credential.
IDOR registration requires business identification and activity information. Depending on the account, applicants may need FEIN, owner information, business locations, responsible-party information and employment details.
How to apply
Register the entity when required, then register with IDOR through MyTax Illinois and use Illinois business-license resources and local government offices to obtain any additional permits.
Licensing & Compliance Checks
<p>General tax registration does not require an examination. Regulated professions and activities may require examinations, education, inspections or other qualifications.</p>
Renewal and ongoing requirements
<p>Keep tax accounts, annual reports and applicable local or professional licenses current. Update IDOR when business name, ownership, address, location or tax responsibilities change.</p>
Processing time
Illinois says MyTax Illinois registration applications are generally processed in approximately 1β2 business days. Additional licenses can take longer.