Illinois is one of the most expensive states in the country for property taxes — not by a little, but by a lot. The effective rate of roughly 1.88% puts the state in a tie with New Jersey at the very top of the Tax Foundation's national rankings. On a typical Illinois home, that adds nearly $500 per month to your mortgage payment before you've counted interest, principal, or insurance. If you're calculating what you can afford in Illinois, understanding that number is non-negotiable.
The rest of this guide covers closing costs (including Chicago's distinctive transfer tax structure), the Illinois Housing Development Authority's current assistance programs, and a sample payment for a median-priced home.
Illinois Property Taxes
Illinois's effective property tax rate sits at approximately 1.88% of home value, according to the Tax Foundation — one of the two highest rates in the nation alongside New Jersey. That's nearly double the national median of roughly 1.0%. The rate reflects county-level assessments and local levies, so it varies across the state, but even the lighter-burdened downstate counties tend to exceed the national average.
Property taxes in Illinois are paid in arrears. You're paying this year for last year's obligation, which means at closing, buyers typically receive a credit from the seller for the unpaid portion of the current tax year — a detail that affects both your closing costs and your first year's cash flow.
| Metric | Illinois | National Average |
|---|---|---|
| Effective property tax rate | ~1.88% | ~1.0% |
| Annual tax on $315,000 home (est.) | ~$5,922 | ~$3,150 |
| Monthly escrow contribution (est.) | ~$494 | ~$263 |
| National ranking (highest = #1) | #1 (tied) | — |
Source: Tax Foundation, 2026. Home price and payment figures are estimates based on reported median prices; actual taxes vary by county and assessed value.
Cook County note: Cook County — which includes Chicago and many suburbs — uses a triennial reassessment cycle and applies different assessment ratios to residential versus commercial property. Your actual tax bill can differ meaningfully from the statewide average. Request the prior year's tax bill from the seller before making an offer.
Closing Costs & Transfer Taxes in Illinois
Illinois buyers generally pay between 2% and 5% of the purchase price in closing costs, covering loan origination fees, title insurance, the appraisal, escrow setup, and prepaid items like the first year of homeowners insurance and prepaid interest. On a $315,000 purchase, that works out to roughly $6,300 to $15,750. Studies cited by Rocket Mortgage and Houzeo peg the average buyer's out-of-pocket closing costs at closer to 2% to 2.1% of the purchase price in lender and third-party fees, before prepaids.
Illinois Real Estate Transfer Tax
Illinois imposes a statewide real estate transfer tax at $0.50 per $500 of the sale price (0.10%). This is customarily paid by the seller. Cook County adds a county-level tax of $0.25 per $500 (0.05%), also typically a seller cost.
Chicago is a different story. The city layers a municipal transfer tax on top of the state and county amounts. Chicago's rates apply to both buyer and seller and became more complex after 2025, when the city adopted a progressive structure for higher-value properties. Properties selling for over $1 million now face elevated rates, with the additional revenue earmarked for homelessness services. The net effect: a $400,000 home closing in Chicago incurs substantially higher total transfer taxes than the same transaction in suburban DuPage or Lake County, where no municipal transfer tax applies.
| Transfer Tax Layer | Rate | Who Pays | Applies Where |
|---|---|---|---|
| State of Illinois | $0.50 per $500 | Seller (customary) | Statewide |
| Cook County | $0.25 per $500 | Seller (customary) | Cook County only |
| City of Chicago (municipal) | Varies; tiered above $1M | Buyer & Seller portions | Chicago city limits |
| Other municipalities | Varies by ordinance | Varies | Select municipalities |
Always confirm applicable transfer taxes with your title company or real estate attorney before closing. Illinois real estate attorneys are standard practice — unlike many states, Illinois closings routinely involve legal counsel for both sides.
First-Time Buyer & Down Payment Assistance Programs
The Illinois Housing Development Authority (IHDA) is the state's primary resource for first-time buyer assistance. Its programs pair with 30-year fixed-rate mortgages and are available through IHDA-approved lenders statewide. Below are the programs currently listed on the IHDA homebuyer portal.
IHDAccess Forgivable
Provides 4% of the purchase price, up to $6,000, for down payment and closing costs. The assistance is forgiven monthly over 10 years — meaning if you stay in the home for a decade, you owe nothing back. Sell or refinance within those 10 years and a prorated portion becomes repayable.
IHDAccess Deferred
Offers 5% of the purchase price, up to $7,500, as a 0% interest second mortgage. Repayment is deferred until you sell the home, refinance, or pay off the first mortgage. There are no monthly payments on the assistance itself.
IHDAccess Repayable
The most generous in raw dollar terms among the standard products: up to 10% of the purchase price, maximum $10,000, also at 0% interest. Unlike the other two, this one is repaid monthly alongside your primary mortgage payment, spread over the loan term.
IHDAccess Home (launched 2026)
The newest IHDA product, launched in spring 2026, offers up to $15,000 in down payment and closing cost assistance structured as a 0% deferred second mortgage — repayable only upon sale, refinance, or after 30 years. Within nine weeks of launch, over 1,500 Illinois households had received commitments through the program. It has quickly become IHDA's highest-volume offering.
Important: Program availability, income limits, purchase price caps, and funding levels change. The official source is ihdamortgage.org/homebuyers. Verify current eligibility requirements with an IHDA-approved lender before making any financial decisions based on these programs.
Sample Monthly Payment
The figures below are estimates only, based on a reported Illinois median home price of approximately $315,000 (Redfin/Houzeo, early 2026 data). Your actual payment will vary based on your specific purchase price, lender rate, county tax rate, and insurance premium. Use these as a planning baseline, not a quote.
| Payment Component | Assumptions | Monthly Estimate |
|---|---|---|
| Principal & Interest | $252,000 loan (20% down on $315K), 6.85% rate, 30-yr fixed | ~$1,656 |
| Property taxes (escrow) | 1.88% effective rate on $315,000 | ~$494 |
| Homeowners insurance | Illinois avg. ~$1,500–$1,800/yr | ~$138 |
| Total PITI (est.) | 20% down, no PMI | ~$2,288 |
Put just 5% down instead of 20%, and the picture shifts significantly: your loan rises to about $299,250, adding PMI of roughly $150–$200/month. The estimated total payment in that scenario climbs above $2,500 per month. Illinois's high property tax burden means taxes represent over 20% of a typical PITI payment here — well above the national norm.
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Use the Free Mortgage Calculator →Frequently Asked Questions
What is the property tax rate in Illinois?
Illinois has an effective property tax rate of approximately 1.88% of home value, ranking among the highest in the nation according to the Tax Foundation. On a $315,000 home, that works out to roughly $5,922 per year, or about $494 per month added to your mortgage payment. Rates vary by county and municipality — Cook County has its own assessment structure, and your actual bill depends on local levies.
Who pays the real estate transfer tax in Illinois?
The state transfer tax ($0.50 per $500) is customarily paid by the seller. Cook County adds $0.25 per $500, also typically a seller cost. Chicago imposes its own municipal transfer tax with buyer and seller portions, and properties over $1 million in the city now face a progressive rate structure enacted in 2025. Suburban buyers outside Chicago generally owe no municipal transfer tax, though some municipalities have their own local ordinances.
What IHDA programs are available for first-time buyers in Illinois?
The Illinois Housing Development Authority offers four primary products: IHDAccess Forgivable (4% of purchase price up to $6,000, forgiven over 10 years); IHDAccess Deferred (5% up to $7,500 at 0% interest, deferred until sale/refinance); IHDAccess Repayable (up to 10% or $10,000 at 0%, repaid monthly); and the newer IHDAccess Home (up to $15,000 deferred, launched early 2026). All pair with a 30-year fixed-rate mortgage. Current eligibility details and approved lenders are listed at ihdamortgage.org.
How much are closing costs for buyers in Illinois?
Illinois buyers typically pay 2% to 5% of the purchase price in total closing costs. Core lender and third-party fees average around 2% to 2.1% of the purchase price; the rest is prepaids (insurance, prepaid interest, escrow setup). On a $315,000 home, budget roughly $6,300 to $15,750 at closing, depending on your lender, loan type, and location. Chicago buyers should account for the city's municipal transfer tax, which can add several thousand dollars to the transaction.