Illinois combines strong worker protections with a business-sophisticated legal environment. The state imposes income-based restrictions on non-competes, has its own trade secrets act, provides extensive tenant protections (especially in Chicago), and recently enacted freelancer payment protections similar to New York's Freelance Isn't Free Act.
This guide covers the Illinois-specific rules that affect the most common contract types.
Disclaimer: This is general information about Illinois contract requirements, not legal advice. For specific situations, consult an Illinois-licensed attorney.
NDAs in Illinois
Illinois NDA law is governed by the Illinois Trade Secrets Act (ITSA), 765 ILCS 1065. ITSA provides the statutory framework for protecting trade secrets and confidential business information.
ITSA Framework
ITSA defines a trade secret as information — including technical or non-technical data, a formula, pattern, compilation, program, device, method, technique, drawing, process, financial data, or list of actual or potential customers or suppliers — that:
- Is sufficiently secret to derive economic value from not being generally known to persons who can obtain economic value from its disclosure or use, and
- Is the subject of efforts that are reasonable under the circumstances to maintain its secrecy
Drafting an Illinois NDA
An Illinois-compliant NDA should:
- Use ITSA-aligned definitions — define confidential information in terms consistent with the statute's two-part test
- Specify reasonable protective measures — marking requirements, access restrictions, return obligations
- Set a reasonable duration — courts evaluate reasonableness case by case, but 2–5 years is standard for business information
- Include carveouts for legally required disclosures — subpoenas, court orders, and government investigations
- Reference ITSA remedies — injunctive relief, actual damages, unjust enrichment, and exemplary damages
ITSA Preemption and Remedies
ITSA preempts conflicting common-law claims based on the same trade secret allegations. The available remedies include:
- Injunctive relief — courts can issue injunctions to prevent actual or threatened misappropriation, including head-start injunctions that account for the competitive advantage gained
- Compensatory damages — actual loss plus unjust enrichment
- Exemplary damages — up to twice the compensatory award for willful and malicious misappropriation
- Attorney's fees — available for willful and malicious misappropriation or for bad faith claims
Federal DTSA Notice
Include the Defend Trade Secrets Act immunity notice in all Illinois NDAs, informing the receiving party of their right to disclose trade secrets to government officials or attorneys for the purpose of reporting suspected legal violations.
Non-Compete Agreements in Illinois
Illinois significantly reformed its non-compete law with the Illinois Freedom to Work Act (820 ILCS 90), effective January 1, 2022. This law imposes some of the most specific procedural requirements in the country.
Income Thresholds
The Freedom to Work Act makes non-competes and non-solicitations unenforceable below specific income levels:
| Restriction Type | Minimum Annual Earnings | |---|---| | Non-compete | $75,000 (increases by $5,000 every 5 years) | | Non-solicitation | $45,000 (increases by $5,000 every 5 years) |
Workers earning below these thresholds cannot be bound by the respective restriction, regardless of what the contract says.
Procedural Requirements
The Act imposes requirements that many employers overlook:
Attorney consultation notice. The employer must advise the employee in writing to consult with an attorney before signing.
14-day review period. The employee must receive at least 14 calendar days to review the agreement before signing. This period cannot be waived.
Adequate consideration. For existing employees (those already working when the non-compete is presented), the employee must receive:
- At least 2 years of continued employment after signing, or
- Other adequate consideration (signing bonus, promotion, equity, etc.)
If the employee is terminated without cause before completing 2 years, the non-compete may be unenforceable for lack of consideration.
COVID-Era Protection
The Act also prohibits non-compete and non-solicitation agreements for employees who were terminated, furloughed, or laid off related to COVID-19 or similar circumstances, unless the employee receives adequate consideration.
Enforcement Approach
Illinois courts evaluate non-competes using a totality-of-the-circumstances test:
- Legitimate business interest — protecting trade secrets, confidential information, or near-permanent customer relationships
- Reasonable time — typically 1–2 years; beyond 2 years requires strong justification
- Reasonable geographic scope — must correspond to where the employer actually operates or the employee had responsibilities
- Reasonable scope of activity — must be narrowly tailored to the competitive activity being restricted
Unlike Florida, Illinois courts do consider the hardship on the employee.
Lease Agreements in Illinois
Illinois tenant protections operate at two levels: state law (which provides baseline protections) and local ordinances (which can significantly expand them, particularly in Chicago).
Illinois State Law (Landlord and Tenant Act)
The Illinois Landlord and Tenant Act provides basic protections:
Security deposits:
- No statewide cap on the amount (but see Chicago below)
- Deposits held for 6+ months in properties with 25+ units must be held in interest-bearing accounts
- Landlords must return deposits within 30 days (45 days in some circumstances) after the tenant vacates
- Itemized statement of deductions required within 30 days
Lease requirements:
- Written leases are not technically required under state law, but oral leases are limited to one year (Statute of Frauds)
- Lead paint disclosure required for pre-1978 properties
- Radon disclosure recommended but not mandated statewide
Chicago RLTO (Residential Landlord and Tenant Ordinance)
Chicago's RLTO provides substantially greater protections. If your rental property is in Chicago, the RLTO supersedes state law where it provides stronger protections.
Security deposits under the RLTO:
- Deposits must be held in a federally insured interest-bearing account in an Illinois financial institution
- Landlords must pay interest to tenants annually (or credit it against rent)
- Deposits must be returned within 30 days of move-out with an itemized statement
- Penalties for non-compliance are severe — if the landlord fails to comply with any RLTO deposit requirement, the tenant can recover the deposit in full, plus two times the deposit amount as damages, plus attorney's fees
Required disclosures under the RLTO:
- The landlord's name, address, and telephone number
- The name and address of the property manager (if different)
- The name and address of the person authorized to manage the premises and accept service of process
- Building code violations issued within the prior 12 months
- A copy of the RLTO summary prepared by the city
Move-in and move-out inspections. The RLTO requires landlords to offer tenants a walk-through inspection within 2 days of move-in. Conditions noted during the inspection cannot later be charged against the security deposit.
Eviction Process
Illinois requires judicial eviction proceedings:
- 5-day notice for nonpayment of rent
- 10-day notice for lease violations (curable violations)
- 30-day notice for month-to-month tenancies
- Chicago imposes additional requirements, including a just cause for eviction requirement under the city's Just Cause for Eviction Ordinance
Create an Illinois lease agreement →
Freelancer Protections in Illinois
Illinois enacted the Freelance Worker Protection Act (effective July 1, 2024), establishing protections for independent contractors similar to New York's Freelance Isn't Free Act.
What the Law Requires
The Act applies to freelance engagements worth $500 or more (either as a single engagement or in aggregate over 120 days with the same hiring party).
Written contract required. Must include:
- Names and addresses of both parties
- An itemization of services to be provided
- The value of services and rate of compensation
- The date by which payment is due
Timely payment. The hiring party must pay:
- On the date specified in the contract, or
- If not specified, within 30 days of the completion of services
No retaliation. Hiring parties cannot retaliate against freelancers for exercising their rights under the Act.
Penalties for Non-Compliance
- Unpaid compensation — the full amount owed
- Damages — up to twice the amount of the underpayment
- Attorney's fees and costs
- Injunctive relief
- The Illinois Department of Labor can investigate and impose civil penalties
What This Means for Your Contracts
If you hire freelancers in Illinois or for work performed in Illinois:
- Always provide a written contract for engagements of $500 or more
- Include specific payment terms with a definite due date
- Retain copies of all contracts and payment records
- Ensure payment terms are realistic — the 30-day default deadline applies if you don't specify otherwise
Create an Illinois freelance contract →
Key Takeaways for Illinois Contracts
- Non-competes have income thresholds. Workers earning $75,000 or less cannot be bound by non-competes; $45,000 or less for non-solicitations. Procedural requirements (attorney notice, 14-day review) apply to all.
- NDAs should align with ITSA. Use the statutory definitions and understand that ITSA preempts conflicting common-law claims.
- Chicago tenant protections go beyond state law. The RLTO imposes strict security deposit rules with severe penalties. If the property is in Chicago, the RLTO controls.
- Freelancer protections are now law. Written contracts and timely payment are required for engagements of $500+ — with double damages for violations.
- Consider adequacy of consideration. For existing employees, a non-compete requires 2 years of continued employment or other adequate consideration. Termination before 2 years may void the restriction.
Illinois balances business flexibility with meaningful worker and tenant protections. The state's specific procedural requirements — especially for non-competes and Chicago leases — make compliance a matter of careful drafting, not just general reasonableness.