1031 Exchanges in Illinois: Rules, Taxes, Insurance, and the Long Arc

A Shop 1031 research page. Reviewed 2026-06-03. Every claim sourced; sources collected at the foot of the page.

Illinois is a high-property-tax conforming state with a stacked municipal transfer tax in Chicago, not a low-friction Midwestern jurisdiction. The distinction matters because the Illinois transfer-tax stack at the state, county, and Chicago levels does not exempt §1031 transactions, and Cook County reassessment can produce material year-one tax shocks for exchangers acquiring previously underassessed property. Illinois conforms to federal §1031 through 35 ILCS 5/203, taxes recognized boot at the flat 4.95 percent rate, and operates the second-highest effective property tax rate in the country. Each of these is independently sourceable.

§1. 1031 mechanics in Illinois

The federal floor applies under 26 U.S.C. §1031 and 26 C.F.R. §1.1031(k)-1. ^{1 2}

Illinois conforms to the federal §1031 framework through 35 ILCS 5/203 (Illinois Income Tax Act, base income provisions). Recognized boot is taxed at the Illinois flat individual income tax rate, currently 4.95 percent. There is no separate Illinois capital gains rate. ³

The Illinois real estate transfer tax stack runs at three levels. The state imposes a transfer tax of $0.50 per $500 of consideration ($1.00 per $1,000) under 35 ILCS 200/31-10. Most Illinois counties impose an additional $0.25 per $500 ($0.50 per $1,000). The City of Chicago imposes a Real Property Transfer Tax of $3.75 per $500 of consideration (with a separate $1.50 per $500 component dedicated to the CTA) for a combined Chicago rate of $5.25 per $500 ($10.50 per $1,000). On a $5,000,000 Chicago commercial acquisition, the combined state-county-Chicago transfer tax stack runs approximately $60,000. Other Illinois municipalities impose additional local-option transfer taxes; confirm the stack before identification. There is no §1031 exemption from the transfer tax. ^{4 5}

Illinois imposes no state-level registration or bonding regime on Qualified Intermediaries. Federal §1031 rules apply.

Illinois is an attorney-state for real estate closings. Both buyer and seller typically engage Illinois-licensed counsel.

§2. Property tax in Illinois

Illinois has an effective property tax rate of approximately 2.07 percent of owner-occupied housing value, the second-highest in the country after New Jersey. The structural mechanics are governed by 35 ILCS 200 (Property Tax Code), with assessment administered at the township or county level. Cook County operates a separate classification system that distinguishes between residential, commercial, and industrial property with different assessment ratios; the rest of Illinois operates on uniform assessment at one-third of fair market value. ⁶

For an exchanger acquiring Cook County commercial property, the Class 5 (commercial) assessment is at 25 percent of fair market value, with a transition system that smooths reassessment changes. The Cook County Assessor reassesses on a triennial cycle by region (City of Chicago, North/Northwest Suburbs, South/Southwest Suburbs). The reassessment can produce concentrated step functions on the property-tax bill.

Harlow’s note on unit economics. On a $5,000,000 Cook County commercial acquisition, year-one property tax runs roughly $90,000 to $130,000 depending on the specific tax code area and the most recent reassessment cycle. Outside Cook County, the figure runs lower but still meaningfully above the national average. The single largest underwriting risk on Illinois commercial property is the Cook County reassessment cycle timing relative to acquisition.

§3. Property insurance in Illinois

Illinois property insurance is dominated by severe-thunderstorm, tornado, and hail exposure across the state. The Chicago metropolitan area faces additional urban-density underwriting considerations. There is no Illinois-specific catastrophe residual market. The Illinois Department of Insurance regulates carrier conduct. ⁷

Harlow’s note on unit economics. For a $5,000,000 Illinois commercial property, expect property-insurance expense in the range of 0.4 to 0.8 percent of insured value, or roughly $20,000 to $40,000 annually. Hail and tornado deductibles have tightened across the state since 2022.

§4. Demographic trends

Illinois’s population stood at approximately 12.5 million as of 2025 Census estimates, with continued negative net domestic migration. Illinois has recorded net domestic out-migration in each year of the past decade, with the dominant outflow destinations being Florida, Texas, Indiana, and Wisconsin. International migration partially offsets the outflow. ^{8 9}

Median household income in Illinois was approximately $80,000 in 2024, slightly above the national median. The Chicago metropolitan area concentrates the highest median; downstate Illinois runs below. ^{10 11}

The major Illinois markets relevant to 1031 exchangers are Chicago-Naperville-Elgin (approximately 9.4 million population including the Indiana and Wisconsin suburban portions), Rockford (approximately 340,000), Peoria (approximately 400,000), Springfield (approximately 210,000), and the Champaign-Urbana corridor (approximately 240,000). Chicago concentrates the deepest balanced commercial market in the Midwest; the suburban Cook and collar counties (DuPage, Lake, Will, Kane, McHenry) carry the most active multifamily and industrial absorption.

§5. Unique legal and financial considerations

The first is the Chicago transfer tax stack, addressed in §1. Disposition-side modeling on Chicago property must include the full $10.50 per $1,000 combined rate.

The second is Cook County reassessment cycle timing. An acquisition just before a reassessment year can produce a sharp year-two tax increase if the new assessed value reflects post-2021 market movement.

The third is the Illinois Real Estate Transfer Tax exemption catalog under 35 ILCS 200/31-45. Certain intra-family and intra-entity transfers qualify for exemption, but §1031 exchanges generally do not. Counsel review confirms applicable exemptions.

The fourth is the Plat Act and the Illinois Land Trust structure. Illinois land trusts are commonly used to hold Illinois real property, with the trustee holding title and beneficial interest residing with the beneficiaries. The land trust structure can interact with §1031 in non-obvious ways; counsel review is appropriate for any acquisition or disposition involving an Illinois land trust.

The fifth is the inclusion of Chicago property in the broader urban revitalization tax-increment financing (TIF) districts, which can affect property-tax operating expense and incentive availability on qualifying properties.

§6. Closing summary and the work ahead

The Illinois 1031 exchanger is operating in a market with a clear set of distinguishing features. The federal floor applies; Illinois fully conforms at the flat 4.95 percent rate; the state-county-Chicago transfer-tax stack does not exempt §1031; the property tax effective rate is the second-highest in the country with Cook County reassessment cycle exposure; insurance exposure is dominated by severe weather; demographic trend is sustained net out-migration partially offset by international; the Chicago land trust structure can complicate §1031 acquisitions; TIF districts affect property-tax economics in qualifying areas. None of these is a reason to avoid an Illinois exchange. Each is a reason to underwrite one carefully. The jurisdiction-specific factors above are starting-point context. A state-experienced CRE professional will translate them into deal-specific judgment.

This is the question Shop 1031 was built to compress. Every Illinois offering memorandum on the platform is normalized to a single schema, underwritten at re-let to the buyer’s specific equity, debt, and DSCR floor, and ranked by Dark Shell Score. For a market with Illinois’s specific overlay, that compression is decisive because the variables that move outcomes (Cook County reassessment timing, Chicago transfer-tax stack on disposition and acquisition, land trust interaction with §1031, TIF district economics) are knowable in advance and frequently missed in conventional buy-side workflows.

This page is the working map. The actual exchange is run by people. An Illinois-licensed real estate attorney, a Illinois-licensed CPA familiar with §1031, a Qualified Intermediary, and a CRE professional who knows this market and these properties. Shop 1031 is the analytics layer that triages which deals deserve your time. The professionals do the work.

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Shop 1031 is an independent analytics platform. We are not a brokerage, a law firm, a tax advisor, a lender, or a Qualified Intermediary. Every 1031 exchange should be reviewed by a state-licensed real estate attorney, a CPA familiar with IRC §1031, and a QI. Brokerage and advisory services, when used, are provided by independently licensed third parties under separate engagement. This page is research, not advice. The Illinois-specific surfaces discussed (state-county-Chicago transfer tax stack with no §1031 exemption, Cook County triennial reassessment cycle timing relative to acquisition, Illinois land trust structure interaction with §1031, TIF district economics, classification differential between Cook County and downstate) each carry material risk if mishandled and should be addressed with an Illinois-licensed attorney, an Illinois-licensed CPA, and a Qualified Intermediary before identification, not after.

Federal authority: 26 U.S.C. §1031; 26 C.F.R. §1.1031(k)-1.

Illinois authority: 35 ILCS 5/203 (income tax conformity); 35 ILCS 200/31-10 et seq. (real estate transfer tax); 35 ILCS 200 (Property Tax Code); Chicago Municipal Code §3-33 (Chicago RPTT).

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