Plain-English guide to the Illinois Wage Payment and Collection Act for employers: who it covers, slides on pay timing and penalties, and a coverage table.
Last reviewed October 29, 2026 · General information, not legal advice
General information only, not legal advice. CPA Tax Payroll and Accounting Corp is a CPA firm, not a law firm. Laws change: confirm with the official source or a licensed attorney before you act. Read the full notice.
The Illinois Wage Payment and Collection Act (IWPCA) is the state law that sets when and how Illinois employers pay wages, what they may take out of a paycheck and what they owe a worker who leaves. The Illinois Department of Labor (IDOL) enforces it. This page is for owners of small businesses, nonprofits and professional practices that run payroll in Illinois.
Slide show: The wage payment law in seven slides
What the law does
The IWPCA sets pay timing, allowed deductions, pay stubs and final pay for Illinois employees.
Who it covers
Every Illinois employer, any size, including local governments and school districts. State and federal employees are outside it.
The core rule
Most employees must be paid at least twice a month. Semi-monthly or bi-weekly wages are due within 13 days after the period ends.
The main number
Late wages cost the employer the amount owed plus 5% of it for every month it stays unpaid.
The deadline
Final pay, including earned vacation, is due by the next regular payday after the worker leaves.
The penalty
Employers ordered to pay wages also owe IDOL a fee of $500, $750 or $1,250, based on the amount ordered.
A common tip
One written policy covering final pay, deductions and expense reimbursement addresses three sections of the Act at once.
Who is covered by the Illinois wage payment law?
Question
Answer
Which employers?
All employers in Illinois, any size, including local governments and school districts
Who is outside the Act?
Employees of the State or federal government
Who counts as an employee?
Anyone permitted to work, unless all three apply: free from control in the contract and in fact; work outside the usual course of business or outside all its places of business (placement agencies follow a different rule); an independently established trade or business
Are owners at risk personally?
Officers and agents who knowingly permit a violation are treated as employers
Where must the work happen?
IDOL says the work must be done in Illinois to bring a claim
Union workers?
Disputes that turn on a union contract with a grievance procedure follow that contract; overtime and prevailing-wage claims can still go to IDOL
Is a written contract needed?
No, an agreement is enough
How it touches your taxes and payroll
The IRS says to keep federal employment tax records at least 4 years, which is longer than the 3-year Illinois pay stub period. The IRS and the IWPCA also test worker status differently, so a worker can pass one test and fail the other; see our guide to employee or independent contractor. Final pay covers earned commissions, bonuses and vacation, which makes a separation a payroll-run deadline. See also payroll tax basics and Illinois state pages.
