Why Sellers Give Property Tax Credits in Chicagoland Closings
If you are selling a home in the Chicago area, one of the closing costs that can catch you off guard is the property tax credit.
Sellers often see this line item on the closing statement and think: Why am I giving the buyer a credit for taxes if I already paid my tax bills?
Fair question. Annoyingly, the answer is not always obvious, because Illinois property taxes are paid in arrears. That means the tax bill you pay this year is usually for the prior tax year. Naturally, because nothing says “efficient system” like paying last year’s bill while trying to close this year’s sale.
In Cook County, property tax bills are generally issued in two installments. The Cook County Assessor explains that property tax bills are mailed twice per year, with the first installment based on 55% of the prior year’s total tax amount, and the second installment reflecting tax rates, levies, assessment changes, and exemptions. (Cook County Assessor’s Office)
That delayed billing system is the reason tax prorations exist.
What Is a Property Tax Credit at Closing?
A property tax credit is usually a seller credit to the buyer for the portion of real estate taxes that accrued while the seller owned the property but have not yet been fully billed or paid.
In plain English: the seller owned the home for part of the year, but the buyer may receive or pay the tax bill later.
So at closing, the seller gives the buyer a credit for the seller’s estimated share of those taxes.
For example, if you sell your home on June 30, the buyer will own the property when later tax bills come due. But some of those taxes relate to the time period when you still owned the property. The tax credit is meant to balance that out.
Why This Matters in Chicagoland Closings
In many Illinois closings, property taxes are not handled simply by asking, “Has the seller paid the latest bill?”
That question helps, but it does not solve the whole issue.
Because taxes are paid after they accrue, there may be unpaid taxes for the seller’s period of ownership even if the seller is current on every bill that has been issued so far.
This is especially important in Cook County, where tax billing delays and installment timing can make the closing math feel less like accounting and more like a ritual designed by people who hate calendars.
For example, the Cook County Treasurer lists the Tax Year 2025 first installment due date as April 1, 2026, while the Tax Year 2024 second installment was due December 15, 2025. (Cook County Treasurer) That timing can create confusion because the year on the tax bill does not always match the year of the closing.
How Tax Prorations Are Usually Calculated
The purchase contract usually controls how property taxes are prorated.
In many local transactions, the parties use a percentage of the most recent ascertainable tax bill. You may see language referring to taxes being prorated at 105%, 110%, or another agreed percentage.
Why use more than 100%?
Because the most recent tax bill may not accurately predict the next bill. Assessments may change. Exemptions may disappear. Tax rates may increase. The buyer does not want to inherit a tax bill that is much higher than the credit they received at closing.
From the seller’s perspective, this is where the negotiation matters. A higher proration percentage means a larger credit to the buyer and less net money to the seller at closing.
Exemptions Can Complicate the Credit
One of the biggest issues in Chicagoland closings is whether the last tax bill included exemptions that the buyer may not qualify for.
Cook County property tax exemptions may include the Homeowner Exemption, Senior Citizen Exemption, Senior Freeze Exemption, Longtime Homeowner Exemption, Returning Veterans’ Exemption, Disabled Veterans’ Exemption, and others. (Cook County)
If the seller had exemptions that reduced the tax bill, the most recent bill may be artificially low compared to what the buyer will owe later.
That can lead to disputes over whether the buyer should receive a larger credit.
Common examples include:
- A seller with a senior exemption
- A seller with a senior freeze
- A seller with a disabled veteran exemption
- A property that was owner-occupied but will not be owner-occupied by the buyer
- A property that recently changed assessment or classification
This does not always mean the buyer automatically gets a huge extra credit. But it does mean the issue should be reviewed before closing, not discovered while everyone is staring at the final settlement statement wondering why the numbers suddenly look worse.
Sellers Should Review the Tax Credit Before Closing
For sellers, the key point is simple: do not ignore the tax proration line on your closing statement.
That credit directly affects your net proceeds.
Before closing, sellers should understand:
- What tax bill is being used for the calculation
- What proration percentage is being applied
- Whether the last tax bill included exemptions
- Whether the buyer is asking for an additional credit
- Whether the contract requires a specific tax proration method
This is not just a clerical issue. It can change the seller’s bottom line by hundreds or thousands of dollars.
The Bottom Line
Property tax credits are common in Chicagoland closings because Illinois property taxes are paid after they accrue. The buyer may end up paying tax bills that cover part of the seller’s ownership period, so the seller usually gives a credit at closing.
That does not mean every proposed tax credit is automatically correct.
The amount depends on the contract, the latest tax bill, the proration percentage, exemptions, and the timing of the closing.
For sellers, the smart move is to review the tax proration early, understand how it affects your proceeds, and raise questions before the closing statement becomes final.
A property tax credit may be routine, but “routine” is not the same thing as “irrelevant.” In a Chicagoland closing, it is one of the numbers that can quietly take a bite out of your sale proceeds if you are not paying attention.
