A 1031 exchange in Illinois lets you sell investment real estate and reinvest in like-kind property while deferring the tax on the gain. The federal rules apply the same way everywhere. Illinois has a simple, flat state tax on the gain and no special closing withholding, but it carries one of the heaviest property tax burdens in the country, which is the number that most shapes a replacement-property decision here. We act as your qualified intermediary, holding the proceeds and handling the documentation so the exchange holds from sale to closing.
Table of contents
- How much is capital gains tax on real estate in Illinois?
- Property tax: the number that drives Illinois underwriting
- Illinois 1031 exchange rules and timeline
- 1031 exchanges across Illinois markets
- Common Illinois 1031 exchange mistakes
- Start your Illinois 1031 exchange
- Frequently asked questions
How much is capital gains tax on real estate in Illinois?
Illinois taxes the gain as ordinary income at a flat 4.95%, with no graduated brackets and no separate capital gains rate. That sits on top of the federal tax an exchange also defers:
- Long-term capital gains at 0%, 15%, or 20%, with the 20% rate applying above $545,500 of taxable income for single filers and $613,700 for married couples filing jointly in 2026.
- The 3.8% Net Investment Income Tax above $200,000 of modified adjusted gross income for single filers, $250,000 for married couples.
- Depreciation recapture, taxed as unrecaptured Section 1250 gain at up to 25%.
- Illinois's flat 4.95% on the gain.
Illinois conforms to Section 1031, so a properly structured exchange defers both the federal and the Illinois tax. The full federal framework is in our main 1031 exchange guide.
Property tax: the number that drives Illinois underwriting
Illinois has among the highest effective property taxes in the country, second only to New Jersey, commonly around 2% of value and higher in parts of Cook County and the collar counties. On a replacement property, this single line can swing the after-tax yield more than the income tax saving does, and Cook County's assessment and appeal dynamics add complexity for larger assets. Model the property tax at the local rate, and factor in the assessment cycle, before you commit to an Illinois replacement deal. It is the first number to check.
Illinois 1031 exchange rules and timeline
The federal deadlines govern, and they are strict:
- 45-day identification. Identify replacement property in writing within 45 days of the sale.
- 180-day closing. Close within 180 days of the sale, or by your return due date including extensions, whichever is earlier.
- No constructive receipt. Proceeds go to your qualified intermediary, never to you.
- Equal or greater value and debt. Reinvest all net proceeds and match or exceed the relinquished value and debt, or the shortfall is taxable boot.
- Same taxpayer. The entity that sold must be the entity that buys.
Illinois does not impose a general nonresident real estate withholding at closing, so the closing process here is simpler than in states like Maryland or California.
1031 exchanges across Illinois markets
Chicago and its metro carry the overwhelming majority of Illinois exchange volume. The region's defining strength is industrial and logistics: Chicago sits at the center of the national rail and freight network, which has made it one of the largest distribution and warehouse markets in the country and a frequent target for industrial exchanges. Multifamily remains strong across the city and the collar counties, while office faces the same pressures seen nationally. Downstate markets such as Peoria, Rockford, and Champaign add commercial and multifamily demand at lower entry prices. Across all of them, the property tax burden is the variable to underwrite carefully.
Common Illinois 1031 exchange mistakes
- Underwriting a replacement property without the local property tax rate and assessment cycle, the largest variable in Illinois.
- Taking receipt of the proceeds, even briefly, which disqualifies the exchange.
- Missing the 45-day identification window.
- Trading down or pulling cash out, which creates taxable boot.
Start your Illinois 1031 exchange
Set up your exchange before your relinquished property closes, so the proceeds never reach your hands and the 45-day and 180-day clocks start clean. Contact our team to begin, or to talk through a specific deal.
Frequently asked questions
How much is capital gains tax on real estate in Illinois?
Illinois taxes the gain as ordinary income at a flat 4.95%, on top of federal capital gains tax.
Is there nonresident withholding when I sell Illinois property?
No. Illinois does not impose a general nonresident real estate withholding at closing.
Why does Illinois property tax matter so much for a 1031?
Illinois has among the highest property taxes in the country, so the carrying cost on a replacement property can affect the after-tax yield more than the income tax the exchange defers. Underwrite it at the local rate.
Do I need a qualified intermediary for an Illinois 1031 exchange?
Yes. The intermediary must hold the proceeds and facilitate the exchange. Engage one before the relinquished property closes.
This page is general information, not tax or legal advice. We act as a qualified intermediary and do not provide tax or legal advice. State and federal rules and thresholds change; confirm current figures with your tax advisor.
