Illinois Mortgage Calculator
Illinois has the second-highest effective property-tax rate in the U.S. — about 2.18% — driven by school and municipal funding.
Illinois effective property-tax rates are the second-highest in the country at roughly 2.18%, behind only New Jersey. The high rate is offset by lower median home values, so tax bills in absolute terms are close to the national average. Cook County (Chicago) adds its own transfer taxes. Buyers should budget for storm insurance in addition to standard homeowners coverage.
Mortgage Calculator
How Mortgage Calculations Work
Loan Amount
We calculate the principal by subtracting your down payment from the home price.
Monthly Payment
Using the loan amount, interest rate, and term, we calculate your fixed monthly payment.
Amortization
Each payment is split between principal and interest, with early payments going more toward interest.
What factors affect your mortgage payment?
- Home Price: The total purchase price of your property
- Down Payment: Large down payments reduce your loan amount and monthly payment
- Interest Rate: Higher rates mean higher monthly payments and more total interest
- Loan Term: Longer terms have lower monthly payments but more total interest
Illinois Mortgage: Median-Priced Home Example
| Item | Value | Notes |
|---|---|---|
| Median home value | $280,000 | Zillow ZHVI Q2 2026 |
| Loan (80% LTV) | $224,000 | 20% down avoids PMI |
| P&I (6.5% / 30yr) | $1,416/mo | 2026 baseline conforming rate |
| Property tax | $509/mo | 2.18% effective rate |
| Homeowners insurance | $150/mo | $1,800/yr (Tornado and severe-storm risk; basement flood risk in some areas.) |
| Total PITI | $2,074/mo | All-in monthly housing cost |
| Conforming loan limit | $832,750 | FHFA 2026 baseline |
Numbers are illustrative. Your rate, taxes, and insurance vary by county, credit score, and exact property. Use the calculator above to model your scenario.
Illinois Sources & References
- Illinois Department of Revenue / Tax Foundation: effective residential property-tax rate of 2.18%.
- Insurance Information Institute (III): average annual homeowners-insurance premium of $1,800 in Illinois.
- Zillow ZHVI Q2 2026: Illinois median home value $280,000.
- Federal Housing Finance Agency (FHFA): 2026 conforming loan limit of $832,750 for Illinois.
- FEMA National Risk Index: tornado and severe-storm risk; basement flood risk in some areas.
Verified accuracy
Cross-checked against authoritative formulas (IRS, NIST, ACM) and updated for 2025/2026 tax years and rates.
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Learn as you calculate
Each calculator includes the formula, plain-English explanation, and FAQs so you understand the result.
Estimates only. Calculator results are for educational and planning purposes — not professional advice. For binding decisions on taxes, investments, health, or legal matters, consult a qualified professional.