Are contract-based non-solicitation of customer agreements enforceable in Illinois?

Are non-solicitation of customer agreements enforceable in Illinois? Yes, if they meet strict reasonableness tests under the Illinois Freedom to Work Act.

September 17, 2026TermScore Legal Intelligence GroupStatutory & Corpus Verified539 words

Are non-solicitation of customer agreements enforceable in Illinois?

Yes, non-solicitation of customer agreements are enforceable in Illinois, provided they are narrowly tailored to protect a legitimate business interest. Under the Illinois Freedom to Work Act and established case law, these agreements must be reasonable in scope, duration, and geographic reach to survive judicial scrutiny.

Key takeaway: An unenforceable non-solicitation clause can be severed by a court, but overly broad language often leads to the entire agreement being voided or heavily modified, creating significant legal risk for employers.

The Legal Framework: Illinois Freedom to Work Act

The Illinois Freedom to Work Act (820 ILCS 90/) serves as the primary regulatory framework for restrictive covenants. While the Act is famous for its restrictions on non-compete agreements, it also governs non-solicitation clauses. To be enforceable, an agreement must meet the following criteria:

  • Legitimate Business Interest: The employer must prove that the restriction is necessary to protect a near-permanent customer relationship or confidential information.
  • Reasonableness: The restriction must not be greater than is required to protect the employer's interest.
  • No Undue Hardship: The agreement must not impose an undue hardship on the employee.
  • Public Interest: The restriction must not be injurious to the public.

The "Reliable Fire" Standard

The Illinois Supreme Court case Reliable Fire Equipment Co. v. Arredondo remains the gold standard for evaluating these agreements. Courts no longer rely on a rigid list of factors; instead, they look at the "totality of the circumstances." If an employer cannot demonstrate a specific, protectable interest—such as long-term client relationships that the employee would not have had access to otherwise—the court will likely strike down the clause.

Key Factors for Enforceability

When drafting or reviewing a non-solicitation agreement, consider the following table of common pitfalls versus best practices.

FactorUnenforceable (High Risk)Enforceable (Low Risk)
ScopeProhibits contact with all clientsProhibits contact only with clients the employee serviced
DurationIndefinite or > 24 months6 to 12 months
GeographyGlobal or statewideLimited to the specific territory of the employee
DefinitionVague "customer" definitionsSpecific list or "active clients in last 12 months"

Actionable Steps for Employers

  1. Audit existing agreements: Review all active contracts to ensure they do not exceed 12 months in duration.
  2. Define "Customer" narrowly: Limit the restriction to clients the employee had direct contact with during their final year of employment.
  3. Include a Severability Clause: Ensure the contract allows a court to "blue-pencil" or modify unreasonable terms rather than voiding the entire document.

Common Red Flags in Illinois Contracts

Many agreements fail because they are drafted as "catch-all" provisions. If your contract prohibits an employee from soliciting "any person or entity that has ever done business with the company," it is likely overbroad. Illinois courts consistently reject clauses that prevent an employee from soliciting customers they never interacted with or had no influence over.

Key takeaway: If a non-solicitation agreement is too broad, Illinois courts may refuse to rewrite it, leaving the employer with no protection at all. Precision is your best defense.

How TermScore Simplifies Compliance

Navigating the nuances of Illinois employment law requires constant vigilance. TermScore uses advanced AI to automatically analyze your non-solicitation and restrictive covenant agreements against current Illinois statutes and case law. By identifying overbroad language and suggesting compliant alternatives in seconds, TermScore helps you mitigate litigation risk and ensure your contracts are enforceable. Upload your templates today to see how your current agreements measure up against the latest legal standards.

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