Mortgage Calculator for Illinois
Estimate your monthly payment in Illinois using adjustable example inputs and official housing resources.
Enter Your Loan Details
Defaults are illustrative inputs, not local averages. Replace taxes, insurance and rate with property-specific estimates.
Planning a purchase in Illinois
The prefilled price, tax percentage, and interest rate are illustrative inputs, not verified Illinois averages or lender quotes. Replace them with the property's price, a local tax estimate, an insurance quote, and your lender's rate.
Cook County uses a different assessment system
Illinois does not have a single property-tax rate. Most real property is assessed at a fraction of market value, while Cook County uses a classification system with different assessment levels. The assessed number alone is not the final bill.
For your estimate: Use the county's tax estimate after applicable equalization and exemptions. Do not put an assessment fraction into the annual tax percentage field.
Illinois Revenue: property-tax calculationIHDA Access options have different repayment paths
IHDA distinguishes Access Forgivable, Access Deferred and Access Repayable assistance. A deferred balance may become payable when the home is sold, refinanced or the first mortgage matures; forgiveness has conditions.
For your estimate: Compare the repayment schedule attached to the actual offer. The calculator does not automatically add a repayable assistance installment or track the remaining deferred lien.
IHDA: homebuyer questionsLocal guidance reviewed . Confirm eligibility, funding and property-specific costs directly before making a decision.
Using local estimates in this tool
The tax field multiplies the home's price by a percentage. If your assessor estimates an annual tax bill, divide that bill by the entered home price and multiply by 100. Do not enter an assessment ratio or millage directly. For example, an illustrative $4,800 annual bill on a $400,000 price corresponds to 1.2%; these are not local averages.
This payment includes principal, interest, property tax and home insurance. Budget mortgage insurance, HOA dues, maintenance and closing costs separately.
Official resources and next steps
HUD housing and homeownership resources for Illinois provides further counseling and housing contacts.
For FHA financing, use HUD's county and unit-count lookup. Select Illinois, the property's county, the calendar year, and the number of units. The 2026 national one-unit floor of $541,287 is a baseline, not a determination of the limit for every county in Illinois.
HUD directory reviewed 2026-09-25. HUD state directory. Local figures are not represented as verified statistics.
Amortization Schedule
| Year | Principal Paid | Interest Paid | Tax Paid | Insurance Paid | Balance |
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How to Use This Mortgage Calculator in Illinois
Enter the price of the property you are considering in Illinois, then adjust the down payment and rate. The payment combines principal, interest, property tax, and insurance. It does not include HOA dues, maintenance, or mortgage insurance.
For example, at the illustrative price of $267,000 and 6% down, the base loan is $250,980. These are calculation examples, not a statement about prices or typical buyers in Illinois.
Compare the same home under different rates and down payments. A lower monthly payment from a longer term can still mean more lifetime interest. Confirm taxes and insurance for the property before relying on the estimate.