Illinois has state income taxes, with reciprocity agreements with nearby states to let employees pay income taxes for the state they reside in. The wage and labor laws closely follow federal regulations. We’ll cover how to complete payroll in Illinois, with explanations of the most important taxes and labor laws that affect payroll.
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Step-by-Step Guide to Running Payroll in Illinois
Step 1: Set up your business as an employer. At the federal level, you need your Employer ID Number (EIN) and an account in the Electronic Federal Tax Payment System (EFTPS).
Step 2: Register with Illinois State. You can register online through MyTax Illinois, complete and mail Form REG-1, or visit a branch of the Illinois Department of Revenue (IDOR). If you mail the form, it can take six to eight weeks to process. The MyTax Illinois account also accepts state unemployment insurance taxes.
Step 3: Set up your payroll. You’ll need to decide how often, when, and how you will pay your employees—direct deposit and paper check are most common methods. You’ll also need to set a process for collecting payroll forms and other documents you’ll need to run payroll.
Step 5: Collect, review, and approve time sheets. If you have hourly or nonexempt employees, you’ll need a way to track employee work hours. Most small business owners create their own time sheets (consider one of our free templates) or use time and attendance software, some of which have free plans.
Step 6: Calculate payroll and pay employees. You’ll need to make several payroll calculations, including totaling hours worked (use our free timecard calculator to help), gross pay, paycheck deductions, tax withholdings, benefit premiums, etc. You’ll also pay employees on schedule. An Excel payroll template or payroll software can help automate this step.
Step 7: File payroll taxes with the federal and Illinois state government. Follow the IRS instructions for federal taxes, including unemployment.
- Illinois Income Taxes: You must file and pay these online at MyTax Illinois. If you are unable to do so, you must request a waiver from IDOR. Payments are due on the 15th of the following month for monthly payments. If you pay semiweekly, payments are due three to five days after payday. The Form IL-941 is due according to the quarterly schedule below. If you pay more than $500 per quarter, you need to file an IL-501. You can download the detailed schedule as a PDF.
- State Unemployment Taxes (SUTA): You can pay for these online with MyTax Illinois or mail in a check with the payment coupon at the bottom of the UI-3/40 or collections coupon IDOR mails you. State UI tax reports and payments are due by the following dates:
For Wages Paid During
Calendar Quarter Ends
Must be Filed and Paid By
Jan, Feb, Mar
Apr, May, Jun
Jul, Aug, Sep
Oct, Nov, Dec
If the due date for a report or tax payment falls Saturday, Sunday, or a legal holiday, reports and payments are considered on time if they are received on or before the following business day.
Step 8. Document and store your payroll records. Illinois requires you to keep records on employees for at least five years, a bit longer than the federal recordkeeping requirements (three years for payroll records and four years for payroll tax documents).
Step 9. Do year-end payroll tax reports. Send the federal Forms W-2s (for employees) and 1099s (for contractors) by Jan. 31 following the year for which you’re reporting. You’ll also need to send copies to the IRS along with a summary form for each.
For more general information on doing payroll for your small business, including a free downloadable checklist to make sure you don’t miss any steps, follow our guide on how to do payroll.
Illinois Payroll Laws, Taxes & Regulations
Naturally, you need to begin by following federal law for income taxes, Social Security, Medicare, and federal unemployment insurance (FUTA). You’ll pay Social Security at the rate of 6.2% of each employee’s paycheck and a corresponding 1.45% for Medicare. Both the employer and the employee will pay these taxes, each paying 7.65% for the combined Social Security and Medicare taxes.
To ensure you maintain compliance with payroll regulations, review the information about Illinois payroll laws, taxes, and regulations below.
State Income Taxes
If you withhold federal income taxes for an employee, you must also withhold state income taxes. The only exceptions are nonresidents working in Illinois who live in states with a reciprocity agreement. Illinois has a flat tax rate of 4.95% of net income, with an allowance of $2,375 per exemption—you’ll need to subtract any exemptions from wages paid and multiply by the 4.95% tax rate. The IDOR Booklet IL-700-T has full instructions and the withholding tables.
If you exceed $12,000 in withholdings during a quarter, you must follow a semiweekly payment schedule as listed in the step-by-step section above. Otherwise, you can pay monthly.
Illinois has reciprocity agreements with Iowa, Kentucky, Michigan, and Wisconsin. If an employee works in Illinois but lives in one of these states, they pay state income taxes for their state of residency. This also applies to employees who are spouses of military members where both are residents of the other state, but the person is only living in Illinois while the military member is stationed in Illinois. Such employees need to fill out an IL-W-5-NR.
Local Income Taxes
There are no local income taxes in Illinois.
Illinois charges SUTA based on a taxable wage base of $12,960. Rates range from 0.675% to 6.875% for experienced employers. However, if your quarter’s total wages are less than $50,000, you pay the lesser of your rate or 5.4%. The standard rate for new employers is 3.175%.
You must pay SUTA if:
- You employed one or more people in Illinois at any one day within each of the 20 or more calendar weeks or any calendar year
- Your annual gross wage payroll equals or exceeds $1,500 in a quarter
- You employed agricultural workers and paid $20,000 or more in cash during any quarter of the current or previous calendar year
- You employed 10 or more workers in agricultural labor in 20 different weeks during the current or previous calendar year
- You employed domestic workers and paid $1,000 or more in cash for domestic services in any quarter of the current or preceding calendar year
The following employee/worker types are exempted:
- Sole proprietors, directors
- Owner’s parent, spouse, or child under 18
- Employees not performing their work in state, unless not covered by their state or Canada—or those who do some work elsewhere and agree to count the other state as their primary
- Independent contractors under some conditions
- Agricultural workers under some conditions
- Domestic workers earning under $1,000 in a calendar quarter
- Maritime workers
- Real estate agents under some conditions
- Newspaper delivery persons under 18
- Insurance agents on commission
- Employees of nonprofits
- Full-time students in an organized camp under certain conditions
Did you Know?: When you pay SUTA, you may qualify for up to a 5.4% discount on your FUTA. FUTA is generally 6% of the first $7,000 of each employee’s paycheck, so if you take the discount, you can effectively pay 0.6%.
Workers’ Compensation Insurance
You must provide workers’ compensation insurance for your employees, even if you have only one part-time employee. This also includes family workers, except for those working very limited hours. You have the option to self-insure, but roughly 90% of employers buy insurance.
For more information on requirements, providers, and costs, check out our Illinois Workers’ Comp guide.
Minimum Wage Laws in Illinois
The Illinois minimum wage applies to workers 18 and older. Illinois is gradually increasing its minimum wage to $15 per hour (much higher than the federal $7.25 minimum wage) according to this schedule—please take note so you can budget for increases and maintain compliance:
Wage for ages 18+
Wages for under 18
$11 per hour
$8.50 per hour
$12 per hour
$9.25 per hour
$13 per hour
$10.50 per hour
$14 per hour
$12 per hour
$15 per hour
$13 per hour
The following exemptions apply:
- Employers with fewer than four employees, excluding a parent, spouse, child, or other immediate family
- Certain agricultural employees
- Outside salesmen
- Members of a religious organization
- Accredited Illinois college or university employees where the is a student covered under the Fair Labor Standards Act (FLSA)
- Certain employees of motor carrier companies
- Baseball players in minor leagues under certain conditions
- Camp counselors under certain conditions
Gratuities can count for up to 40% of minimum wage.
Illinois Overtime Regulations
You need to pay employees at least time-and-a-half overtime pay if they work more than 40 hours in a workweek. This includes some salary workers, but only if they’re classified as nonexempt employees.
- Salesmen and mechanics at dealerships
- Agricultural laborers
- Executive, administrative, and professional employees, as defined by the FLSA
- Certain radio/television employees
- Commissioned employees, as defined by the FLSA
- Employees who exchange hours per a workplace agreement
- Employees of certain educational or residential child care institutions
- Employees receiving remedial education that does not include job-specific training but is for general education to an eighth-grade level
For help calculating overtime correctly so you avoid over- or under-paying taxes, use our free overtime calculator.
Different Ways to Pay Employees
Pay Stub Laws
Employees must receive an itemized pay stub each payday showing wages, deductions, and net pay. If you’re not using a payroll system, you may not automatically have access to pay stubs. To create your own so you can stay in compliance, use one of our free pay stub templates.
Minimum Pay Frequency
You must pay wages at least semimonthly and within 13 days following the close of a pay period. Monthly paydays are permitted for executive, administrative, and professional employees, plus employees working on commission who are covered by the FLSA.
Paycheck Deduction Rules
You may deduct money from an employee’s paycheck for the following:
- Legally required garnishments (like child support)
- Employee benefits like health insurance
- Valid wage assignment or deductions that employees consent to in writing
- Repayment of cash advances at a payment schedule of no more than 15% of the employee’s wages
You may not deduct money for:
- Uniforms, tools, or employer-owned equipment
- Cash or inventory shortages or damages, unless the employee agrees to it in writing
Final Paycheck Laws
Final paychecks are due by the next regularly scheduled payday, but the state recommends you pay them upon separation. Final compensation includes wages, salaries, commissions, bonuses, and the monetary equivalent of earned vacation, holidays, or other compensations that have not been paid.
Accrued Paid Time Off
Illinois does not require a specific accrued time off rate. However, if you set a vacation policy, it must be in writing and earned pro-rata as the employee works for you. You can start accrual after a probationary period if desired. You may set a use-or-lose policy as long as the employee has a reasonable opportunity to use the vacation. Learn more on the Illinois government website.
Illinois HR Laws That Affect Payroll
Illinois New Hire Reporting
You must report new hires to the Illinois Department of Employment Security (IDES) within 20 days of the employee’s first day on payroll. You can do this through MyTax Illinois.
Lunch and Other Break Time Requirements
Employers must give employees a minimum of 24 hours of rest each calendar week—i.e., one day off every six. An employee may elect to waive this, but you must have a written agreement with the employee.
Employers must give a meal break of at least 20 minutes for every 7.5-hour shift. The break must be given no later than five hours after the start of the shift.
Paid Sick Leave
In the News: Chicago and Cook County have their own Sick Leave ordinance mandating you accrue an hour of paid sick leave for every 40 hours worked.
Illinois does not mandate any specific number of paid or unpaid days of sick leave. Be sure to follow federal law, but note, the Illinois Employee Sick Leave Act does allow employees to use sick leave not only for themselves but for the care of family members.
Paid Time Off for Voting
Employees can take up to two hours of paid time off for voting. You can opt to schedule voting hours for them as well.
The Illinois child labor laws cover minors under 16 and require all minors to have employment certificates. No minor can work in a hazardous job such as sawmills, construction, or where alcohol is served or sold (except as a busboy or at a park.)
- Minors doing lawn care and residential or domestic chores around the home when not business-related
- Minors over 13 who caddy at a golf course
- Minors 12 and 13 employed as officials at certain sports activities
Illinois allows minors 14 and 15 to work a maximum of three hours per day, 24 per week when school is in session, not to exceed eight hours combined school and work in a day—federal law restricts hours to 18 weekly when school is in session. When school is not in session, minors under 16 may work up to eight hours per day, six days per week, for a maximum of 48 hours in a week—federal law doesn’t place any limit on work hours for minors 16+.
Minors may work between 7 a.m. and 7 p.m. except between June 1 and Labor Day, when the work hours are extended to 9 p.m. They must receive a meal break of at least 30 minutes no later than the fifth consecutive hour of work.
For more information on federal child labor laws, check out our guide on hiring minors.
Illinois State IL-W-4 Form
- IL-W-4: This form is to be used when calculating withholdings for Illinois state taxes. Employees should fill it out upon being hired. If an employee does not fill it out, you need to withhold the maximum without any exemptions.
Other Illinois State Payroll and Tax Forms
- IL-W-5-NR: Nonresident request for exemption for residents of Kentucky, Michigan, Iowa, or Wisconsin, or spouses of military currently living in Illinois while the military member is stationed there
- IL-501: Withholding payment coupon if you are unable to pay income tax withholdings online
- IL-941: Withholding tax return
- WC-1: To apply for income tax credits if you participate in certain programs
Federal Payroll Forms
- W-4 Form: To help employers calculate taxes to withhold from employee paychecks
- W-2 Form: Reporting total annual wages earned (one per employee)
- W-3 Form: Reports total wages and taxes for all employees
- Form 940: Reports and calculate unemployment taxes due to the IRS
- Form 941: Filing quarterly income and FICA taxes withheld from paychecks
- Form 944: Reporting annual income and FICA taxes withheld from paychecks
- 1099 Forms: Providing nonemployee pay information that helps the IRS collect taxes on contract work
For a more detailed discussion of federal forms, check out our guide on federal payroll forms you may need.
Illinois Payroll Tax Resources/Sources
- Illinois Department of Revenue: Register your business, file returns, make payments, get withholding information, and more
- Illinois Department of Employment Security (IDES): Get information on job fairs, labor data, unemployment taxes, and other topics
- Illinois.gov Business Page: Articles on managing your business and employees, and links for registrations, licenses, and permits
- Illinois Workers’ Compensation Commission Website: All the information you need for how to obtain and make use of workers’ comp
Illinois charges state income tax and SUTA, plus requires you to get workers’ comp from a third-party insurer unless you self-insure. The minimum wage is ratcheting up to $15 per hour in 2025. Most payments are handled through MyTax Illinois. Making sure you understand the rules and procedures for managing payroll in Illinois can help you avoid costly fines.