How to Close a Business Legally in Illinois
Illinois adds its own WARN Act at 75 employees, mandatory vacation payout, and paid leave considerations on top of federal requirements.
An Illinois workplace shutdown sits in a regulatory middle ground. The state has its own WARN Act with a lower employer threshold than the federal law, mandatory vacation payout rules, and the newer Paid Leave for All Workers Act that creates additional payout considerations during closures.
How the Illinois WARN Act Differs from Federal WARN
The Illinois Worker Adjustment and Retraining Notification Act (820 ILCS 65) adds state-specific requirements beyond federal WARN:
| Regulation | What it means for employers |
|---|---|
| Lower employer threshold | IL WARN applies to employers with 75 or more full-time employees, compared to 100 under federal WARN. |
| Different mass layoff triggers | IL WARN uses a 25-employee minimum combined with a one-third test, while federal WARN uses 50 employees with a one-third test (plus a 500-employee absolute trigger). |
| Mandatory vacation payout | Illinois requires payment of all accrued vacation at termination — no use-it-or-lose-it policies allowed. This adds significant cost to shutdowns. |
| Paid Leave for All Workers Act | Since January 2024, employees earn 40 hours of annual leave that may create payout obligations depending on policy structure. |
| Active state enforcement | The Illinois Department of Commerce and Economic Opportunity (DCEO) receives WARN notices and monitors compliance. |
What Triggers the Illinois WARN Act? (75 Employees, Mass Layoff Thresholds)
Illinois WARN Act Plant Closure Threshold: 50 Employees
A plant closure triggering IL WARN requires:
- Employer has 75+ full-time employees
- Permanent or temporary shutdown of a single site
- 50 or more full-time employees lose employment within a 30-day period
Illinois WARN Act Mass Layoff: 25 Employees at One-Third of Workforce
Mass layoffs have a two-tier test under IL WARN:
| Employees affected | Additional requirement | IL WARN triggered? |
|---|---|---|
| 25–249 employees | Must be at least one-third of full-time workforce at the site | Yes, if one-third test met |
| 250+ employees | No percentage test | Yes, always |
| Under 25 employees | N/A | No |
Comparison with federal WARN:
| Provision | IL WARN | Federal WARN |
|---|---|---|
| Employer threshold | 75 full-time employees | 100 employees |
| Plant closure trigger | 50 employees | 50 employees |
| Mass layoff — lower tier | 25+ at one-third | 50+ at one-third |
| Mass layoff — upper tier | 250+ (no percentage) | 500+ (no percentage) |
| Notice period | 60 days | 60 days |
The key difference for mass layoffs: IL WARN’s lower tier starts at 25 employees (federal starts at 50), and the upper tier where the percentage test is waived starts at 250 (federal is 500).
Illinois WARN Act 60-Day Notice Requirements
Who Must Receive an Illinois WARN Notice?
| Recipient | Details |
|---|---|
| Each affected employee | Individual written notice (or to union representative) |
| Illinois DCEO | Written notice to the Department of Commerce and Economic Opportunity |
| Chief elected official of the municipality | Written notice |
| Chief elected official of the county | Written notice |
What Must an Illinois WARN Notice Include?
| Required field | Details |
|---|---|
| Site information | Name and address of the employment site |
| Company contact | Name and phone number |
| Action type | Whether the action is permanent or temporary |
| Separation timeline | Expected date of first separation and schedule of subsequent separations |
| Affected positions | Job titles and number of affected employees per title |
| Bumping rights | Information about seniority-based bumping rights |
| Union status | Representation status and contact information |
How to Count the 60-Day Illinois WARN Notice Period
IL WARN requires 60 days of advance notice — the same as federal WARN. Unlike New York and New Jersey (both 90 days), Illinois does not require an extended notice period. However, employers covered by both state and federal law should verify which requirements apply and deliver notice that satisfies both.
Illinois Final Pay Rules: Mandatory Vacation Payout and the IWPCA
Illinois’s final pay rules during shutdowns are shaped by the Illinois Wage Payment and Collection Act (IWPCA), which has two provisions that significantly affect shutdown costs:
Does Illinois Require Vacation Payout at Termination? (Yes)
Illinois is one of a handful of states that requires payment of all accrued, unused vacation at termination. Under 820 ILCS 115/5:
- All earned vacation must be paid on the next regular payday after the separation date
- Use-it-or-lose-it vacation policies are prohibited in Illinois
- This applies regardless of reason for termination — whether the employee quits, is fired, or loses their job in a shutdown
- The payout is calculated at the employee’s final regular rate of pay
Example: A restaurant manager with 3 weeks (120 hours) of accrued vacation earning $25/hour receives a $3,000 vacation payout in their final check.
Vacation Payout Can Be the Biggest Surprise Cost
Many employers underestimate their total vacation liability. Run a report of all accrued balances well before the shutdown:
| Employee count | Avg accrued vacation | Avg hourly rate | Total vacation payout |
|---|---|---|---|
| 50 employees | 80 hours each | $22/hour | $88,000 |
| 75 employees | 60 hours each | $18/hour | $81,000 |
| 100 employees | 40 hours each | $25/hour | $100,000 |
Illinois’s no-forfeiture rule means these balances cannot be zeroed out before the shutdown — they must be paid in full. Start running your leave balance reports at least 60 days out.
For a shutdown of 50 employees, vacation payouts alone can represent a substantial cost. Run your time tracking and leave management data well in advance to calculate the total obligation.
How the Illinois Paid Leave for All Workers Act Affects Shutdowns
The Paid Leave for All Workers Act (effective January 1, 2024) gives employees 40 hours of paid leave annually. During a shutdown:
- Employees can choose to use their paid leave during the notice period — employers cannot deny valid requests
- Employers cannot force employees to use paid leave during employer-directed closures
- Whether unused paid leave must be paid out at termination depends on how the leave program is structured in the employer’s policy. If paid leave is structured as vacation-equivalent time, Illinois law may require payout
Consult employment counsel on how your specific leave policy interacts with the payout requirement. Structuring paid leave separately from vacation can help manage this exposure.
When Must Illinois Employers Pay Final Wages After a Layoff?
Under the IWPCA, all final compensation must be paid on the next regularly scheduled payday. This includes:
| Component | Details |
|---|---|
| Earned wages | All earned wages through the final day |
| Vacation payout | Accrued vacation payout |
| Commissions/bonuses | Any earned commissions or bonuses |
| Expenses | Expense reimbursements |
Penalties for late payment include the amount owed plus 5% per month in damages, plus reasonable attorneys’ fees and costs.
Benefits and COBRA After an Illinois Layoff
All benefits continue through the 60-day WARN notice period. After termination, Illinois continuation coverage extends to employers with fewer than 20 employees, providing up to 12 months — beyond that, standard COBRA applies.
Chicago Shutdown Requirements: Fair Workweek, Minimum Wage, and Earned Sick Leave
Employers closing operations in Chicago should be aware of additional city-level requirements:
| Requirement | Details |
|---|---|
| Chicago Fair Workweek Ordinance | Fast food and other covered employers must comply with scheduling requirements through the final workday. Premium pay obligations for schedule changes during the wind-down period still apply. |
| Chicago Minimum Wage Ordinance | Chicago’s minimum wage exceeds the state minimum. Final paychecks must reflect the correct Chicago rate for all hours worked at Chicago locations. |
| Cook County Earned Sick Leave Ordinance | If applicable, review whether earned sick leave balances have payout obligations under the ordinance or company policy. |
Illinois Plant Closure Timeline: 60-Day Compliance Calendar
| Days before shutdown | Action |
|---|---|
| 60+ days | Issue IL WARN notices to employees, DCEO, and local officials |
| 60 days | Confirm benefits continuation through the notice period |
| 60 days | Issue federal WARN notice if separately required |
| 30 days | Calculate vacation payouts and paid leave balances for all affected employees |
| 14 days | Prepare final paychecks; prepare COBRA election notices |
| 7 days | Verify time tracking records and all accrued leave balances |
| Last day | Finalize time records; confirm final checks ready for next regular payday |
| Next payday | Distribute final paychecks including vacation payouts |
| Within 14 days | Issue COBRA/IL continuation coverage election notices |
Illinois Employer Shutdown Compliance Checklist
- IL WARN notices sent to employees, DCEO, and local officials 60 days in advance (75+ employer threshold)
- Mass layoff triggers calculated (25+ at one-third, or 250+ regardless)
- Final paychecks include mandatory vacation payout (no use-it-or-lose-it allowed)
- Paid Leave for All Workers Act balances reviewed for payout obligations
- Chicago Fair Workweek / minimum wage / earned sick leave requirements reviewed (if applicable)
- Time tracking records finalized and archived
- IWPCA compliance confirmed — final pay on next regular payday with 5%/month penalty for late payment
Shutdown laws vary by state. See our guides for California, New Jersey, New York, and Texas, or read the complete workplace shutdown guide.
More Illinois employer guides: Weather closure rules in Illinois | Hiring as an IL sole proprietor
Frequently Asked Questions
Does the Illinois Paid Leave for All Workers Act affect shutdowns?
Yes. Employees earn 40 hours of paid leave annually and can choose to use it during the shutdown notice period. Employers cannot force its use. Whether unused paid leave must be paid out depends on policy structure — if it’s combined with or equivalent to vacation, Illinois payout rules likely apply. Employers should review and potentially restructure their leave policies before a shutdown.
Can Illinois employers stagger layoffs to stay below WARN thresholds?
This strategy carries risk. Both IL WARN and federal WARN look at employment losses within 30-day periods, but regulators can aggregate layoffs that are part of a single plan over a 90-day window. If the DCEO or DOL determines that staggered layoffs were designed to evade notice requirements, they may treat the layoffs as a single event and impose full penalties.
What happens to 401(k) and retirement plan contributions during an Illinois shutdown?
Employer retirement contributions must continue through the WARN notice period as long as the employment relationship is active. After termination, employees have the standard options: leave funds in the plan (if permitted), roll over to an IRA or new employer’s plan, or take a distribution (subject to taxes and potential penalties).
