The Prairie State

Illinois Legal, Tax
& Document Resources

“State Sovereignty, National Union” — Illinois state motto

Official Illinois resources: tax deadlines, labor laws, business registration, immigration guidance, and free AI contract review — all in plain English.

12M+
Residents
4.95% flat
State Income Tax
$15.00 (employers with 4+ employees)
Min. Wage
Great Seal of the State of Illinois
6th
by population
5th
GDP $1202B
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Illinois Lease Agreement
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✓Deposit terms comply with state law
12,719,141
Population
Census 2025 ↗
$1,202B
State GDP
BEA 2025 ↗
$83,211
Median Income
ACS 2024 ↗
1.4M
Small Businesses
SBA 2025 ↗
4.6%
Unemployment
BLS Sep 2026 ↗
15.4%
Foreign-Born
ACS 2024 ↗
Income Tax
4.95% flat
State income tax (2026)
Min. Wage
$15.00 (employers with 4+ employees)
Eff. 2025-01-01
Property Tax
2.08%
Avg effective rate on owner-occupied homes
Sales Tax
6.25% state; 8.96% avg. with local
State rate; local rates may add
LLC Fee
$150
Articles of Organization
Unemployment
4.6%
Seasonally adjusted
Tax Deadline
Apr 15
State return due (next business day if a weekend)
Annual Report
$75
LLC annual filing

How Illinois compares

Ranked against the other 49 states on the figures we hold. Rates that combine state and local components — sales tax, the minimum wage where it varies by region — are shown on this page but not ranked, because a single number would misstate them.

FigureILNationallyIn its region
PopulationUS Census Bureau, Vintage 2025 estimates, July 1, 202512,719,1416th highest of 501 of 12
GDP ($bn)Bureau of Economic Analysis, 202512025th highest of 501 of 12
Median household incomeUS Census Bureau, ACS 2024 1-year, 2024$83,21118th highest of 502 of 12
Unemployment rateBureau of Labor Statistics, LAUS (seasonally adjusted, preliminary), September 20264.6%tied 40th lowest of 5011 of 12
Foreign-born shareUS Census Bureau, ACS 2024 1-year, 202415.4%13th highest of 501 of 12
Property tax ratechecked Nov 2026; confirm with the Illinois legislature2.08%49th lowest of 5012 of 12
Deposit return window (days)checked Nov 2026; confirm with the Illinois legislature30tied 15th lowest of 504 of 12
Eviction notice (days)checked Nov 2026; confirm with the Illinois legislature5tied 23rd highest of 504 of 12
Final pay deadline (days)checked Nov 2026; confirm with the Illinois legislature14tied 26th lowest of the 29 states that set one6 of 8
  • State income tax: yes41 of 50 states answer the same way
  • At-will employment: yesthe same in all 50 states — it does not set Illinois apart
  • Paid sick leave required: yes20 of 50 states answer the same way
  • Paid family leave: no38 of 50 states answer the same way
  • Workers' comp required: yes49 of 50 states answer the same way
  • Rent control permitted: no46 of 50 states answer the same way
  • Annual report required: yes43 of 50 states answer the same way

Statistical figures: US Census Bureau, Vintage 2025 estimates (July 1, 2025) · US Census Bureau, ACS 2024 1-year (2024) · Bureau of Economic Analysis (2025) · Bureau of Labor Statistics, LAUS (seasonally adjusted, preliminary) (September 2026) · SBA Office of Advocacy, 2025 Small Business Profiles (2025). Tax, wage, business and tenancy figures are recorded from state sources and were last checked on 2026-11-05 — confirm anything you are about to act on with the Illinois legislature.

How long you have in Illinois

The periods that decide whether something is on time. Days are calendar days unless the underlying rule says otherwise.

Return a security deposit within
30 days
Eviction notice before filing
5 days
Final paycheck within
14 days
LLC formation processed in
5-10 business days
Annual report due
By the first day of the LLC's anniversary month
Overtime starts after
40 hrs/week

AI Legal Insights — Illinois

AI-generated · Updated July 2026

Powered by Gemma AI
Legal Climate

Illinois operates under an at-will employment doctrine, meaning employment can generally be terminated by either party at any time. The state also mandates paid sick leave, providing 40 hours per year, with specific local requirements in cities like Chicago.

Business Climate

With a massive GDP of $1,024B and over 1.2 million small businesses, Illinois serves as a central economic hub. However, businesses must navigate a relatively high sales tax in Chicago and a flat income tax rate of 4.95%.

Immigration

The state maintains a diverse demographic profile with a foreign-born population of 14.4%. This diversity contributes significantly to the state's labor market and cultural landscape.

Contract Tips for Illinois
  • ›Ensure compliance with local Chicago-specific labor ordinances when drafting employment agreements.
  • ›Account for the 10.0% average sales tax when structuring consumer-facing service contracts.
  • ›Verify all LLC filings are processed with the $150 state fee to maintain legal standing.

AI-generated insights · Verify with a licensed attorney before relying on this information.

🔍 What documents do you need in Illinois?

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Employment Laws

Illinois labor regulations

IL

Illinois is an at-will employment state with a $15.00/hr statewide minimum wage (employers with 4+ employees), in effect since January 1, 2025. The Paid Leave for All Workers Act gives most employees up to 40 hours of paid leave a year for any reason, unless a local ordinance (such as Chicago's) already covers them.

LawIL RuleFederal Floor
Minimum Wage$15.00/hr since January 1, 2025 (employers with 4+ employees); tipped workers $9.00/hr cash wage; Chicago and Cook County set higher local minimums$7.25/hr
OvertimeAfter 40 hrs/week at 1.5× the regular rateFLSA: after 40 hrs/week
Paid LeaveUp to 40 hrs/year of paid leave for any reason under the Paid Leave for All Workers Act; Chicago and Cook County employers follow local ordinances instead (Chicago: 40 hrs paid sick leave plus 40 hrs paid leave)None (federal)
Paid Family LeaveNo state paid family leave programFMLA: 12 weeks unpaid
Workers CompRequired for virtually all employers (820 ILCS 305)Federal employees: yes
At-Will EmploymentYes, with public-policy and contract exceptionsDefault nationwide
Final PaycheckAt separation if possible, and no later than the next regularly scheduled payday; earned vacation must be paid out (820 ILCS 115)No federal requirement
Meal Breaks20-min meal break for shifts of 7.5+ hours, starting no later than 5 hours into the shift (820 ILCS 140)No federal requirement
Day of RestAt least 24 consecutive hours of rest in each workweekNo federal requirement
Non-Compete AgreementsVoid for employees earning $75,000/year or less (threshold rises to $80,000 on January 1, 2027); non-solicits void at $45,000 or less ($47,500 from 2027)No federal statute
Pay TransparencyEmployers with 15+ employees must include the pay scale and benefits in job postings (since January 1, 2025)No federal requirement
Notable Exceptions & Protections
  • Chicago and Cook County set their own, higher minimum wages and paid leave rules.
  • Since January 1, 2026, using AI in employment decisions in a way that discriminates is a civil rights violation, and employers must provide paid lactation breaks.

Sources: U.S. Department of Labor state minimum wage table · state labor agencies (checked Nov 2026)

Landlord-Tenant Laws

Illinois rental regulations

IL

Illinois landlord-tenant rules vary by city. Chicago's Residential Landlord and Tenant Ordinance adds strong tenant protections, including interest on security deposits and strict deposit-handling rules; there is no statewide rent control.

TopicIL Rule
Security DepositNo statewide statutory limit on the amount
Deposit ReturnStatewide (buildings with 5+ units): itemized statement of deductions within 30 days and the balance within 45 days; Chicago RLTO: return within 45 days
Deposit InterestRequired statewide for buildings or complexes with 25+ units; in Chicago, landlords pay interest at a rate set each year by the city
Rent ControlLocal rent control is prohibited statewide (765 ILCS 720)
Eviction Notice (Non-Payment)5-day written notice to pay or quit before filing (735 ILCS 5/9-209)
Eviction Notice (Lease Violation)10-day written notice to quit for breach of lease terms other than rent
Month-to-Month Termination30 days' written notice to end a month-to-month tenancy
Source of IncomeThe Illinois Human Rights Act bars refusing to rent because a tenant's income comes from a housing voucher or other lawful source
Late Fee CapNo statewide cap; the Chicago RLTO limits late fees to $10/month for the first $500 of rent plus 5% of rent above $500
Repair & DeductChicago tenants may repair and deduct (limited amount) or withhold part of the rent after written notice and the landlord's failure to repair within 14 days (Chicago RLTO Sec. 5-12-110)
Know your rights

Both landlords and tenants have enforceable rights under Illinois law. Document all communications and keep copies of your lease agreement. Use AI review to spot risky clauses before signing.

Starting a Business

Illinois LLC formation guide

IL

Illinois has the fifth-largest state economy in the US (about $1.2 trillion in GDP) and roughly 1.4 million small businesses. It has a flat 4.95% individual income tax and a combined 9.5% corporate rate (7% income tax plus 2.5% personal property replacement tax). Forming an LLC costs $150, and the annual report costs $75 a year. Chicago and Cook County add local taxes and employment ordinances, so the total tax and compliance burden is among the higher in the Midwest.

$150
LLC Filing Fee
Free
EIN (IRS)
$75
Annual Report

Step-by-step LLC formation

  1. 1
    Choose a business name — must include "LLC," "L.L.C.," or "Limited Liability Company"; check availability at ilsos.gov
  2. 2
    File Articles of Organization (Form LLC-5.5) with the Illinois Secretary of State online or by mail
  3. 3
    Pay the $150 non-refundable filing fee (online filing is typically faster)
  4. 4
    Designate a registered agent — must have a physical Illinois street address
  5. 5
    Obtain an EIN from the IRS — free at irs.gov
  6. 6
    Register with the Illinois Department of Revenue (MyTax Illinois) for income, sales, and payroll taxes
  7. 7
    File the annual report each year by the first day of the LLC's anniversary month; the fee is $75
  8. 8
    Open a dedicated business bank account using your EIN and Articles of Organization
United States Federal

Every LLC also needs a free EIN from the IRS (Form SS-4). Apply online at irs.gov — takes about 15 minutes and is required to open a business bank account.

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Federal Offices

United States government offices in Illinois

US GOV
IRSIRS Taxpayer Assistance Centers

Walk-in assistance by appointment only. Call (844) 545-5640 to schedule, or book online at irs.gov.

Chicago Loop Taxpayer Assistance Center
230 S. Dearborn St, Chicago, IL 60604
Chicago North Taxpayer Assistance Center
2525 W. Higgins Rd, Hoffman Estates, IL 60169
Oakbrook Terrace Taxpayer Assistance Center
1 Tower Ln, Oakbrook Terrace, IL 60181
Springfield Taxpayer Assistance Center
3101 Constitution Dr, Springfield, IL 62704
USCISUSCIS Field Offices

Immigration appointments via my.uscis.gov or call (800) 375-5283.

Chicago Field Office
101 W. Congress Pkwy, Chicago, IL 60605
Oakbrook Terrace Field Office
1 Tower Ln, Oakbrook Terrace, IL 60181

Latest Tax & Business News

Updated daily

Check these official sources for latest Illinois tax & business news:

Illinois Cities

Localized legal, tax & contract help for each city.

29 cities
Chicago
Finance · Technology
Aurora
Manufacturing · Healthcare
Joliet
Logistics & Warehousing · Manufacturing
Naperville
Technology · Financial Services
Rockford
Manufacturing · Healthcare
Springfield
Government · Healthcare
Elgin
Healthcare Services · Advanced Manufacturing
Peoria
Healthcare Services · Advanced Manufacturing
Waukegan
Healthcare · Manufacturing
Champaign
Higher Education · Healthcare
Cicero
Manufacturing · Logistics and Warehousing
Bloomington
Insurance · Healthcare
Schaumburg
Retail and Shopping · Corporate Headquarters
Evanston
Higher Education · Healthcare
Arlington Heights
Healthcare Services · Professional Services
Bolingbrook
Logistics and Warehousing · Manufacturing
Decatur
Agricultural Processing · Manufacturing
Palatine
Healthcare Services · Retail Trade
Skokie
Healthcare · Retail Trade
Des Plaines
Logistics and Warehousing · Aviation Services
Orland Park
Healthcare Services · Retail Trade
Oak Lawn
Healthcare Services · Retail Trade
Berwyn
Healthcare Services · Retail Trade
Mount Prospect
Healthcare Services · Retail Trade
Show all 29 cities
Tinley Park
Retail and Commerce · Healthcare Services
Wheaton
Healthcare · Professional Services
Oak Park
Healthcare Services · Professional Services
Normal
Higher Education · Healthcare
Hoffman Estates
Healthcare Services · Logistics and Warehousing

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Common Questions

Illinois legal & business FAQ

IL
Illinois has a flat individual income tax rate of 4.95% on all taxable income, regardless of income level. Corporations pay a combined 9.5% (7% corporate income tax plus 2.5% personal property replacement tax). There is no graduated scale.
Illinois follows the federal deadline: Form IL-1040 is due April 15 (April 15, 2027 for 2026 returns). Illinois grants an automatic six-month extension to file, but any tax owed must still be paid by the April deadline to avoid penalties and interest.
The Illinois minimum wage has been $15.00 per hour since January 1, 2025, for employers with 4 or more employees. Tipped employees must receive a cash wage of at least $9.00 per hour, with tips making up the difference. Chicago and Cook County set higher local minimums that adjust each July.
Yes. The Paid Leave for All Workers Act (effective January 1, 2024) requires employers to provide up to 40 hours of paid leave per year that employees can use for any reason. Employers in Chicago and Cook County follow local ordinances instead; Chicago requires 40 hours of paid sick leave plus 40 hours of paid leave. Illinois has no paid family leave program.
No statewide minimum wage increase is scheduled; the rate stays $15.00 per hour. On January 1, 2027, the salary thresholds under the Illinois Freedom to Work Act rise: non-competes are void for employees earning $80,000 or less, and non-solicitation agreements for those earning $47,500 or less. Review templates for new hires before then.
File Articles of Organization (Form LLC-5.5) with the Illinois Secretary of State; the filing fee is $150 and processing typically takes 5–10 business days. You need a registered agent with an Illinois street address and an EIN from the IRS (free). Then register with the Department of Revenue through MyTax Illinois.
Yes. Illinois LLCs file an annual report every year by the first day of their anniversary month, and the fee is $75. Late reports incur a penalty, and an LLC that does not file can be administratively dissolved.
Illinois has no statewide cap on security deposits. In buildings with 5 or more units, landlords must send an itemized statement of deductions within 30 days and return any balance within 45 days; buildings or complexes with 25+ units must also pay interest. Chicago's Residential Landlord and Tenant Ordinance adds stricter rules, including interest on deposits and penalties for non-compliance.
The landlord must serve a 5-day written notice demanding the rent. If the tenant does not pay, the landlord can file an eviction case in circuit court. Only the sheriff, acting on a court order, can remove a tenant; lockouts are illegal.
This page lists two offices for Illinois: the Chicago Field Office at 101 W. Congress Pkwy, Chicago, IL 60605, and an office at 1 Tower Ln, Oakbrook Terrace, IL 60181. USCIS visits are by appointment only; call the USCIS Contact Center at (800) 375-5283 to request one.
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