How Non-Compete Agreements Are Enforced and Legally Challenged

30 Million American Workers Are Bound by Non-Competes

Approximately 30 million workers in the United States — roughly 18% of the workforce — have signed non-compete agreements, according to a 2019 Economic Policy Institute analysis. These workers range from fast-food employees to neurosurgeons. The American Sandwich chain Jimmy John's faced a widely publicized lawsuit in 2016 for requiring sandwich makers to sign non-competes prohibiting them from working at any competing sandwich shop within two miles for two years after leaving — a clause eventually settled by the Illinois and New York attorneys general.

Non-compete agreements restrict where and for whom an employee can work after leaving a position. Their enforceability varies so dramatically by state that the same clause signed by the same employee for the same role would be void in California and fully enforceable in Florida. Understanding the legal landscape requires examining both the national framework and the state-specific rules that govern enforcement.

The Four-Factor Enforceability Test

Courts in most states that permit non-competes apply a reasonableness test examining four primary factors. An agreement that fails any single factor may be struck down entirely or modified.

• Legitimate business interest: The employer must have a protectable interest — typically trade secrets, proprietary information, substantial investment in training, or unique customer relationships. Preventing competition alone is not a legitimate interest
• Reasonable geographic scope: A clause prohibiting work in a 50-mile radius may be reasonable for a regional sales representative but unreasonable for a software developer whose role has no geographic constraints
• Reasonable duration: Six months to two years is the typical enforced range; clauses exceeding three years are rarely upheld except in business sale contexts
• Reasonable activity restriction: Prohibiting work in a directly competing role is more likely to be upheld than prohibiting all employment in an entire industry

The consideration requirement is a threshold issue in some states: a non-compete signed after employment begins — without additional compensation, promotion, or benefit — may be unenforceable for lack of consideration. Courts in states like Illinois have voided post-hire non-competes that provided no benefit beyond continued employment.

State-by-State Variation: The Most Important Variable

The FTC's 2024 Rule and Its Aftermath

The Federal Trade Commission issued a final rule in April 2024 that would have banned virtually all non-compete agreements for workers nationwide, covering approximately 30 million employees. The rule was scheduled to take effect in September 2024. Federal district courts in Texas and Florida blocked enforcement, with the Northern District of Texas issuing a nationwide injunction in August 2024.

The legal challenges argued that the FTC exceeded its statutory authority under the FTC Act in issuing substantive competition rules rather than addressing specific unfair practices. As of 2025, the rule remained enjoined pending appellate review, and its ultimate fate depends on whether courts conclude the FTC has broad rulemaking authority over employment terms. The litigation represents one of the most significant employment law developments in decades, regardless of its outcome.

• The FTC estimated the rule would have increased annual worker earnings by $300 billion if fully implemented
• Several states have independently restricted non-competes for lower-income workers: Minnesota banned them entirely in 2023
• The trend across state legislatures since 2015 has been consistently toward greater restrictions on non-compete use

Blue Penciling and Judicial Modification

When courts find a non-compete clause unreasonably broad, they face a choice: void the entire clause or modify it to make it enforceable. "Blue penciling" is the judicial practice of striking or modifying overbroad provisions rather than voiding the contract entirely. States diverge significantly on whether blue penciling is permitted.

Florida courts must modify unreasonable non-competes rather than void them. California courts void them entirely. New York courts will narrow overbroad geographic or temporal scopes but will not rewrite clauses that lack legitimate business justification. In states that permit blue penciling, an employer who drafts an aggressively overbroad clause may get a narrowed but enforceable version; in states that void overbroad clauses, the employer may lose all protection.

Garden Leave as an Alternative

Garden leave — an arrangement in which an employee continues to be paid during a notice period but is relieved of duties and barred from joining a competitor — is a legally cleaner alternative to post-employment non-competes. Because the employer continues paying the employee, consideration issues do not arise. Because the restriction is during employment rather than after, enforceability is generally higher.

Garden leave is standard practice in the United Kingdom and is increasingly used in the United States in high-stakes departures involving senior executives or employees with access to sensitive customer data. The employer continues to pay salary (and often benefits) during the garden leave period, making it more expensive than a traditional non-compete — but also more reliably enforceable.

This article is for informational purposes only and does not constitute legal advice.