Capital Gains Tax on Rental Property

Selling a rental property in Chicago, IL almost always triggers a capital gains tax question, and the math behind that tax is more involved than a simple comparison of what you paid and what you sold for. Capital gains on a rental property are calculated using your adjusted basis, not your original purchase price, and adjusted basis moves in both directions over the years you own the property. This guide explains how the gain is actually calculated, what tax rates apply, and how the calculation differs for a rental property compared to a home you have lived in yourself.

Your adjusted basis starts with what you originally paid for the property, plus qualifying capital improvements you made along the way, such as a new roof, an addition, or a major system replacement. From that adjusted basis, you generally subtract the depreciation you have claimed, or were entitled to claim, on your tax returns each year you rented the property. This is why two Chicago, IL landlords who paid the same price for similar buildings can owe very different amounts of tax on sale. The landlord who depreciated the property aggressively for fifteen years generally has a lower adjusted basis, and therefore a larger taxable gain, than one who owned the property for only three years.

How the Gain Is Taxed

Once you know your adjusted basis, the taxable gain is your net sale price minus that basis. If you held the rental property for more than one year, the gain is generally taxed at long term capital gains rates, which are lower than ordinary income tax rates and currently range from zero percent to twenty percent at the federal level depending on your total taxable income. Illinois applies its flat individual income tax rate to the same gain, since Illinois does not offer a separate reduced rate for capital gains the way the federal system does. Because Illinois is a flat tax state, every dollar of gain is taxed at the same state rate regardless of how large the gain is, which is different from the graduated federal brackets that apply progressively higher rates as income rises.

There is a second tax layer that many Chicago, IL rental property owners overlook until it appears on their return. The portion of your gain attributable to depreciation you claimed is taxed separately as unrecaptured Section 1250 gain, generally at a federal rate of up to twenty five percent, which is higher than the standard long term capital gains rate that applies to the remaining appreciation. This means a rental property that gained value steadily and was depreciated for many years can produce a blended tax rate meaningfully higher than an investor expects if they only think about the standard capital gains rate. High income sellers should also account for the net investment income tax, an additional three point eight percent federal tax that can apply to rental gains above certain income thresholds.

Reducing or Deferring the Tax

Chicago, IL rental property owners have a few paths to reduce the tax bill on a sale. Selling in a lower income year, offsetting the gain with capital losses from other investments, and timing the sale relative to other income are all legitimate planning tools worth discussing with a tax advisor. Some owners also look at cost segregation studies before selling, though that generally increases prior depreciation deductions and can increase the recapture portion of the gain rather than reduce it, so the net benefit depends heavily on individual circumstances.

The most complete option for deferring the tax, rather than simply reducing it, is a 1031 exchange. A properly structured 1031 exchange defers both the capital gains tax and the depreciation recapture tax on a rental property by rolling your proceeds into a new like kind replacement property rather than taking the sale proceeds as cash. It is important to understand that a 1031 exchange defers this tax. It does not eliminate it. Your basis carries over into the replacement property, and the deferred gain generally becomes taxable again when you eventually sell without doing another exchange, though many investors continue exchanging property after property and only face the tax event once, if ever, often as part of estate planning.

Chicago, IL investors selling a rental property, whether a two flat in Logan Square, a small multifamily building in Rogers Park, or a single family rental in the suburbs, should model both the standard sale scenario and a 1031 exchange scenario before listing the property, since the difference between paying tax now and deferring it can be substantial once depreciation recapture and the net investment income tax are factored in alongside the flat Illinois rate. A tax advisor can run the actual numbers based on your specific adjusted basis and holding period, and our team can walk you through how a 1031 exchange into a qualifying replacement property would work if deferral fits your goals.

Cook County property records and prior tax filings are often the best starting point when reconstructing an accurate adjusted basis, particularly for a rental property owned for many years or acquired through a series of refinances. Chicago, IL landlords who have consistently claimed depreciation on IRS Form 4562 each year already have a documented depreciation history that a tax advisor can use to calculate the recapture portion precisely, rather than estimating it. Owners who are unsure whether depreciation was claimed correctly in every year of ownership should have a tax professional review prior returns before listing the property, since an inaccurate depreciation history can lead to an inaccurate estimate of both the standard gain and the recapture exposure at the time of sale.