Three Key Takeaways
Chicago does not have a local income tax. Illinois law does not grant municipalities the authority to levy their own income taxes, so what you owe is governed entirely at the state and federal levels.
Illinois’s state-level income tax structure is more complex than it first appears. C-corporations face a combined Illinois rate of 9.5%, while pass-through entities such as S-corporations and partnerships owe a 1.5% Personal Property Replacement Tax on net income in addition to the 4.95% flat rate their owners pay individually.
No local income tax does not mean no city tax obligations. Chicago levies its own distinct taxes on equipment leases, parking, amusement, and certain transactions that can meaningfully affect the cost of operating within city limits.
If you run a business in Chicago, the tax landscape can feel overwhelming. Between city registration, state filings, and federal returns, it is easy to lose track of what you actually owe and to whom.
One question we hear often from Chicago business owners: does Chicago have a local income tax?
It is a fair question. Cities like New York, Philadelphia, and Detroit all impose local income taxes on top of state obligations, and business owners with experience in those markets sometimes assume Chicago works the same way. It does not. This article explains why, what your Illinois income tax obligations actually look like, and what city-level taxes you may still owe.
Chicago Does Not Have a Local Income Tax, and Here Is Why
Illinois law does not permit municipalities to levy their own income taxes. Under the Illinois Constitution, home rule units like the City of Chicago may only impose a local income tax if the General Assembly expressly grants that authority, and it has not done so.
This sets Illinois apart from states like Pennsylvania, Ohio, Kentucky, and New York, where cities can and do impose their own income taxes. If you have run a business in Philadelphia or New York City, you may be used to filing a separate city return and withholding city income tax from paychecks. None of that applies in Chicago.
Proposals for a Chicago municipal income tax have come up over the years, but none have been enacted. In practical terms, there is no Chicago income tax line on your return, no city withholding requirement, and no city income tax registration.
Key Takeaway: Chicago does not impose a local income tax, and under current Illinois law, it cannot. Income tax is a state and federal matter only.
What Illinois Business Income Tax Actually Looks Like
The absence of a city income tax does not mean your Illinois obligations are simple. How much you owe the state depends significantly on how your business is structured.
C-Corporations
Illinois imposes a 7% flat corporate income tax on net income. C-corporations also owe the Personal Property Replacement Tax (PPRT) at 2.5%, bringing the combined state rate to 9.5%, one of the higher combined corporate rates in the Midwest. Per the Illinois Department of Revenue, this rate has been in effect since July 1, 2017. Returns are filed on Form IL-1120, due April 15 for calendar-year filers.
S-Corporations, Partnerships, and LLCs
Pass-through entities do not pay the 7% corporate income tax. Business income flows to the owners, who pay Illinois’s flat 4.95% individual rate on their personal returns. That said, S-corporations and partnerships do owe the PPRT at 1.5% of net income at the entity level.
Illinois also offers an optional Pass-Through Entity Tax (PTET) election at 4.95%, which lets owners pay state income tax at the entity level and potentially work around the federal SALT deduction cap. Our article on what Illinois businesses can do if the Pass-Through Entity Tax ends covers this in depth.
Sole Proprietors
Sole proprietors report business income on their personal Illinois return at the 4.95% rate. The PPRT does not apply.
For filing deadlines and a full rate comparison by entity type, see our guide to Illinois Business Tax Deadlines and Filing Requirements.
Key Takeaway: Depending on your structure, Illinois income taxes may include both a flat income tax and the Personal Property Replacement Tax. The combination catches many business owners off guard, particularly those operating as C-corporations.
Do Not Confuse “No Income Tax” With “No City Tax”
This is where many business owners make a costly assumption. Because Chicago does not have a local income tax, it can be tempting to assume city-level taxes are not a concern. They are.
Chicago levies a range of transactional and industry-specific taxes on businesses operating within city limits, administered by the Chicago Department of Finance through a separate registration and filing system. Complying with Illinois state tax law does not satisfy Chicago’s requirements.
Some of the most common city taxes our clients encounter: the Personal Property Lease Transaction Tax at 11% applies when a business leases equipment or furniture used in Chicago, which affects restaurants, contractors, and office-based businesses alike. Chicago’s combined sales tax rate starts at 10.25% and reaches 11.75% in certain districts. Parking facilities and valet operators owe a 23.25% Parking Tax. Venues and event organizers owe the Amusement Tax. Liquor, hotel, and ground transportation businesses face additional city-specific levies.
These obligations require separate city registration, monthly electronic filing, and payment by the 15th of each month. Late payment triggers a 5% penalty plus 12% annual interest.
For a full breakdown of how these taxes work and where businesses most often run into trouble, see our article on navigating Chicago’s business taxes.
Key Takeaway: City-level transactional taxes create real obligations and real penalties that are entirely separate from your state and federal income tax picture. The absence of a Chicago income tax does not mean Chicago is a light tax environment.
Employer Withholding: What Chicago Businesses Owe for Their Employees
Chicago employers sometimes wonder whether they owe anything to the city on behalf of their workers, beyond standard state and federal withholding. The answer is no. There is no Chicago city-level income tax withholding.
Chicago employers withhold Illinois state income tax at 4.95% and remit it to the Illinois Department of Revenue. That is the full extent of the income-related withholding obligation. Employers file quarterly on Form IL-941 and are required to pay electronically through the MyTax Illinois portal.
One nuance worth knowing: Illinois has reciprocal tax agreements with Iowa, Kentucky, Michigan, and Wisconsin. Employees who live in one of those states but work in Illinois may elect to have taxes withheld for their home state instead, which can require some payroll configuration.
New employers also need to register with the Illinois Department of Employment Security for unemployment insurance. For 2025, UI rates range from 0.725% to 7.85% on the first $13,916 of each employee’s wages.
Key Takeaway: Chicago employers have Illinois state withholding obligations but no city-level withholding requirement. Multi-state workforces and reciprocity agreements can add complexity worth reviewing with a tax advisor.
Putting It All Together
Chicago does not have a local income tax, and Illinois law currently prevents any municipality from imposing one. But that does not make the tax picture simple. Illinois’s business income tax structure, the Personal Property Replacement Tax, employer withholding rules, and Chicago’s transactional taxes together create a layered set of obligations at three levels of government.
The business owners who run into trouble are usually not ignoring their taxes. They are misunderstanding which level applies to which obligation.
At Ahlbeck & Cook, we help Chicago-area business owners across restaurants, construction, franchises, and professional services make sense of the full picture. If you have questions about what your business actually owes, contact us today to start the conversation.
