Estimate your full monthly mortgage cost in Illinois — including the nation's highest property taxes. Compare Chicago vs. suburbs and understand your true PITI payment.
Key figures for homebuyers in the Prairie State (2025 estimates)
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Open Mortgage Calculator →Illinois presents a challenging but navigable real estate market. With a median home price of $260,000, the state appears affordable — and it largely is, outside of Chicago's premium neighborhoods. But that affordable purchase price comes with a significant catch: Illinois has one of the highest average effective property tax rates in the United States at 2.05%. For buyers accustomed to states like Arizona (0.62%) or Colorado (0.49%), this difference can dramatically alter affordability calculations.
The math is stark: on a $260,000 Illinois home, annual property taxes average $5,330 — or $444/month added to your P&I payment. In Arizona, the same home would generate about $1,612 in annual property taxes ($134/month). That's a $310/month difference, or $3,720/year purely in property tax burden.
Chicago's residential property tax burden, while still high, is somewhat moderated by the city's vast commercial tax base. Owner-occupied single-family homes in Chicago typically face effective rates of 1.8%–2.2% on their assessed value. The city offers homeowner exemptions that can reduce taxable assessments by $10,000, providing meaningful relief to primary residents. Neighborhoods like Logan Square, Pilsen, Hyde Park, and Bridgeport continue to attract buyers with home prices in the $250,000–$500,000 range.
Many suburbs immediately surrounding Chicago — Oak Park, Evanston, Skokie — carry effective property tax rates of 2.5%–3.2%, which are notably higher than Chicago proper. A $350,000 home in Evanston with a 3% effective rate generates $10,500/year ($875/month) in property taxes alone, which dramatically changes the affordability picture despite the lower purchase price compared to NYC or LA.
The collar counties surrounding Cook County (DuPage, Kane, Lake, Will, McHenry) offer a range of suburban markets. Naperville in DuPage County has long been one of Illinois's most desirable suburbs, with median home prices of $380,000–$450,000 and top-rated schools. Aurora in Kane County provides more entry-level options in the $230,000–$300,000 range. Property tax rates in these collar counties typically range from 2.0%–3.0%, comparable to or higher than Cook County.
The Illinois Housing Development Authority (IHDA) offers several programs for first-time and repeat buyers. The Access Forgivable program provides a grant of 4% of the purchase price (up to $6,000) that does not need to be repaid if the buyer remains in the home. The SmartBuy program pairs down payment assistance with student loan payoff assistance — unique among state programs. IHDA also offers reduced mortgage rates for income-qualifying borrowers through its mortgage credit certificate program.
For a realistic Illinois budget on a $260,000 home purchase with 20% down:
Principal & Interest (7%, 30yr on $208,000): ~$1,385/month
Property Tax (2.05%): ~$444/month
Homeowner's Insurance: ~$80–$120/month
Total PITI: ~$1,909–$1,949/month
Add HOA fees if applicable (common in condos and planned communities). The state income tax of 4.95% further reduces take-home pay, compressing what buyers can realistically qualify for. Lenders typically want total PITI to remain under 28% of gross monthly income for conventional loans.
Based on Illinois's $260,000 median with 20% down at 7%/30yr, the P&I is ~$1,385/month. Illinois's high 2.05% property tax adds ~$444/month, bringing PITI to approximately $1,850/month.
Illinois relies heavily on property taxes to fund local schools and services, compounded by underfunded pension obligations at state and local levels. This results in one of the highest average effective property tax rates in the country at 2.05%.
Illinois imposes a flat 4.95% income tax on all individuals. Combined with high property taxes, Illinois ranks among the highest overall state-and-local tax burden states in the US.
Counterintuitively, many Chicago suburbs have higher effective rates (2.5–3.5%) than the city itself (~1.8–2.2%). Chicago's large commercial tax base helps distribute the burden, while suburban municipalities rely more heavily on residential property taxes.