"Does the Seller's Illinois Homeowner Exemption Carry Over to Me After I Buy?"

Your first Cook County property tax bill after closing will often still show the seller's Homeowner Exemption. That bill covers a tax year when the seller lived in the home, because Cook County bills a year behind, so the exemption printed on it belongs to that year.

No. In Illinois the homeowner exemption belongs to the owner who lives in the home, so the seller's ends with the seller. Your first tax bills after closing can still show it, because they cover years the seller lived there. In Cook County you apply once in your own name, and the Assessor renews it automatically after that, which keeps your escrow close to what you planned.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, licensed in fifteen states, including Illinois, NMLS #483943, through C2 Financial Corporation. I'll go through the tax years with you, find the one that is your first, and tell you when to file.

How does the Illinois homeowner exemption work in Cook County?

If you're buying a Cook County home to live in, the Homeowner Exemption is the first one I'd like you to know about. It comes from Section 15-175 of the Illinois Property Tax Code, the general homestead exemption statute, and in Cook County it takes $10,000 off the home's equalized assessed value.

The equalized assessed value, usually shortened to EAV, is the figure your local tax rate gets multiplied against to produce your bill. That means the exemption lowers your bill by $10,000 times your local tax rate, and the Cook County Assessor's homeowner exemption page explains your savings the same way.

According to the Assessor's office, most homeowners qualify because they own the home and live in it as their principal residence. The Assessor's answer on who can receive it adds that you can also qualify with a lease or contract that makes you responsible for the property taxes. In each case, the home has to be your main residence for the tax year you're claiming.

Because of that, the exemption follows whoever lived in the home during a given tax year. The seller's exemption ends when they sell, and you file your own once the home is yours.

Your first bills can still show the seller's exemption

The bills you pay in 2026 are for tax year 2025, and the bills you pay in 2027 are for tax year 2026. If you close in the fall of 2026, a good part of what you pay in your first months of ownership covers years when the seller owned the home and lived in it.

You'll see each tax year arrive as two installments. The Cook County Treasurer's office describes the first installment as an estimate equal to 55% of the prior year's total tax. The Cook County Assessor's office says exemptions show up on the second installment bill.

So if your first few bills after closing look just like the seller's, exemption included, there is nothing wrong with them, because they cover tax years when the seller lived in the home.

The seller usually pays their share of the year's tax bill through a credit at closing, which is called the tax proration. I explain it in how the prorated property tax credit works at closing. I'd ask you to send me your complete final closing statement, all pages, please, and we can look at that proration together.

The January 1 date sets your first exemption year

For a home that already exists, the Assessor uses January 1 as the starting line for a tax year. A certificate of error is how the Assessor corrects an exemption that was missed on an earlier tax year. Its certificate of error page asks for documents showing the home was your principal residence as of January 1 of the tax year you are claiming. The same office prorates the exemption for a newly built home that was not ready to live in until after January 1.

To find your first year, I'd look at the first January 1 on which you own the home and live in it. That tax year is yours, and the application for it is the one you file.

Take an October 2026 closing. The seller lived in the home on January 1, 2026, so tax year 2026 was the seller's year. January 1, 2027 is your first, so tax year 2027 is the first one your exemption can reach. If your dates are close to the line, I'd call the Assessor's office with you to confirm which tax year your first application covers.

Your escrow at closing and the first year in your name

Your lender sizes your escrow account from the tax figures available at closing. Escrow is the account where part of each monthly payment is set aside to pay your property tax and insurance. On a Cook County resale, those figures usually carry the seller's Homeowner Exemption, because the most recent bills were the seller's. For your first stretch of ownership that figure is accurate, since the seller lived in the home during those tax years.

The change comes with the first tax year in your name. If you have filed, that bill comes in close to what your escrow was built on. If the application never went in, the bill comes in higher by $10,000 times your local tax rate.

Once a year, your servicer reviews the escrow account. The servicer is the company that collects your monthly payment and pays your tax bill from escrow. If the account is short, the servicer raises the monthly payment to cover the gap and the higher bill going forward.

One application in your own name keeps your payment where we planned it. How an escrow account handles taxes and insurance covers the cushion and the yearly review in more detail. The national version of this question, including how lenders estimate taxes on a purchase, is in how property taxes can change after you buy a home.

How do I apply for the Cook County homeowner exemption after I buy?

On a Cook County purchase, here is how I'd take it, in this order.

1. Before you make an offer, I'd start by looking up the home on the Treasurer's exemptions page. The Treasurer's site finds a property by address or by its 14-digit PIN, which is the property index number. Seeing which exemptions are on the current bill tells us which ones belong to the seller.
2. After closing, please move in and make the home your main residence. The exemption is for a home you live in, so a home you buy to rent out, or as a second home, does not qualify.
3. When the Assessor opens your first tax year, you apply online in your own name. The Assessor posts each year's filing period on its own site, and I'd ask you to read the dates there, because they change from year to year.
4. Once your exemption is granted, please look for it on the second installment bill for that year, and I'm happy to look the bill over with you. The Assessor renews it automatically in the following years as long as you still live there.

If a year slips by, the certificate of error I described earlier lets the Assessor correct a missed exemption, and the Cook County Assessor's office lists which tax years are still open on that page.

Buying outside Cook County

Every other Illinois county runs its exemptions through its own county assessment office, usually called the supervisor of assessments, and the general homestead exemption amounts there are smaller than Cook's. The idea is the same in each county: the seller's exemption ends when they sell, and you file your own with your county's office.

My page on buying a home in the Peoria area explains how the general homestead exemption and the senior exemptions work downstate. If you are buying in the city or in the collar counties, the suburban counties around Cook, my page on buying a home in the Chicago area covers Cook's three-year reassessment cycle. That cycle can move your assessment in the same year you close. Either way, your county's office can tell you whether a new owner files and when.

Before you close

I'd start with the listing, which shows the seller's tax bill with the seller's exemptions and possibly an assessment that is about to change. Your own bill will be different, so I'd rather we build your payment from the numbers for your first tax year than from the listing.

I'd also look at the senior exemption and the senior freeze, because both belong to the individual owner. The senior freeze can hold the home's assessed value in place for an owner who is 65 or older and meets an income limit. If you are 65 or older, please ask the Assessor about them at the same time you ask about the Homeowner Exemption.

The Assessor renews an exemption for an owner who already has one. A new owner files the first application, so I'd put the filing period on your calendar as soon as we know your first tax year.

A worked example with made-up numbers

The numbers below are invented to show the mechanism, including the tax rate. I'll use a condo in Evanston with a local tax rate of 7%.

Homeowner Exemption (Cook County)      $10,000 of EAV
Local tax rate (invented)                        7.0%
                                       --------------
Yearly difference on the bill                    $700
Monthly difference in escrow             about $58.33

For an October 2026 closing, the tax years line up like this.

Tax year 2025   billed in 2026   seller's year
Tax year 2026   billed in 2027   seller lived there Jan 1, 2026
Tax year 2027   billed in 2028   you live there Jan 1, 2027
Your first application           tax year 2027

If you file for tax year 2027, your escrow keeps running close to where it started. If nobody files, that year's bill comes in about $700 higher in this example, and the servicer's next escrow review raises the monthly payment by the higher tax plus a share of the shortage.

Your next step in Illinois

If you are buying in Illinois, I'd love for you to see your own payment with the property tax for your first tax year built into it. You're welcome to look at your numbers here, where you'll see pricing for your scenario and can choose a rate option, and you can change that selection later. It does not need a credit pull or an account, and nobody will call you unless you ask.

If you'd like a pre-approval letter to go with your offer, mortgage pre-approval in Illinois is where we review your income, assets and credit properly. Buying a home in Illinois covers the attorneys, the title company and the rest of what is different about closing here. You are also welcome to call me, and we can look at the tax bill on the home you are considering together.

Nothing here is a loan approval, a denial, a commitment to lend, or tax or legal advice. Whether you qualify, and for which tax year, is decided by the Cook County Assessor or your county's supervisor of assessments, so please confirm it with that office.

Common questions

Does the homeowner exemption transfer to the new owner in Illinois?

No. The homeowner exemption is tied to the owner who lives in the home as their principal residence, so the seller's exemption ends with the seller. In Cook County the new owner applies in their own name. The bills right after closing can still carry the seller's exemption, because they cover tax years the seller lived there.

When can I apply for the Cook County homeowner exemption after buying a home?

On a home that already existed, your first tax year is the first one where you own the home and live in it on January 1. You apply when the Cook County Assessor opens filing for that tax year, and the Assessor posts the dates on its website. A newly built home that was not ready until after January 1 can get a prorated exemption.

How much does the Cook County homeowner exemption save?

It lowers the home's equalized assessed value by the amount Section 15-175 sets for Cook County, which the Assessor lists on its homeowner exemption page. The savings on the bill equal that amount times your local tax rate, so they depend on where the home is in Cook County. The Assessor's office can show you the rate that applies to your property.

Do I have to reapply for the homeowner exemption every year in Cook County?

No. You file the first application in your own name, and the Cook County Assessor renews the Homeowner Exemption automatically each year after that, as long as you still live in the home.

Will a missing homeowner exemption raise my mortgage payment?

It can. Your escrow is usually set from bills that carry the seller's exemption. If you never file for your own, the first tax year in your name comes in higher by the exemption amount times your local tax rate, and your servicer's yearly escrow review raises the monthly payment to catch up.