Illinois (IL) · State tax: 4.95% · Property tax: 2.23% · Median home (ZHVI): $275,000
As of · Sources: Zillow ZHVI, Tax Foundation, Census ACS, Freddie Mac PMMS
In Illinois, the median home price is $275,000 as of 2026, which directly determines your loan amount and monthly payment. Property taxes run 2.23% annually — about $6,133/year on a median-priced home — and are typically rolled into your monthly PITI payment. Homeowners insurance averages $1,310/year in Illinois, adding roughly $109/month to your total housing cost. With a 4.95% state income tax, Illinois residents can potentially itemize mortgage interest deductions, reducing the effective cost of homeownership.
Home value, monthly carrying cost, property tax, and insurance are the four levers for the mortgage payment calculator in Illinois. Every row cites a primary public dataset. Numbers reflect the most recent vintage available; refresh cadence is documented in the methodology.
Every real-estate number on this page runs through the same core identity: the monthly principal-and-interest payment on a fully amortizing fixed-rate loan is M = P · r / (1 − (1+r)^(−n)), where P is the loan principal, r is the monthly rate (annual rate / 12), and n is the term in months. For a typical Illinois buyer in 2026, P starts from an $275,000 median home value (Zillow ZHVI)[1], minus a standard 20% down payment.
On top of P&I the calculator adds the two Illinois-specific carrying costs: property tax at the state effective rate of 2.23%[2] and homeowners insurance at roughly $1,310/year (NAIC state average)[3]. The Freddie Mac PMMS national average 30-year fixed rate (6.30% (Freddie Mac PMMS · week of ))[4] drives the payment curve — Illinois rate quotes can move a few basis points around that number depending on lender, loan size, and credit band.
Calc-specific note: For a fully amortising 30-year fixed, plug Illinois's ZHVI minus 20% down into the M = P·r/(1−(1+r)^−n) identity — output is principal + interest only.
Worked example — Illinois
A Illinois buyer purchasing the median home at $275,000 with 20% down ($55,000) borrows $220,000. At the PMMS 6.30% 30-year fixed, monthly P&I is $1,362. Add $511/month property tax (2.23% effective rate) and the typical Illinois homeowners premium to reach full PITI.
Same formula, different inputs. Each city name links to its own pSEO page where the calculator is pre-filled with local medians.
| City | Median home | Median rent | HUD FMR 2BR | Median income | Est. P&I |
|---|---|---|---|---|---|
| Chicago, IL | $344,687 | $2,180/mo | $2,000/mo | $88,850 | $1,707/mo |
| Rockford, IL | $213,900 | $1,234/mo | $1,125/mo | $66,571 | $1,059/mo |
| Peoria, IL | $164,790 | $1,155/mo | $1,075/mo | $70,872 | $816/mo |
| Naperville, IL | $485,000 | $1,800/mo | $1,650/mo | $125,800 | $2,402/mo |
| Joliet, IL | $240,000 | $1,250/mo | $1,150/mo | $68,500 | $1,188/mo |
Sources: Zillow ZHVI + ZORI[1], HUD FMR[2], Census ACS[3], Freddie Mac PMMS[4].
Moving one state over changes the mortgage payment numbers. Compare median home value (Zillow ZHVI), top marginal income tax rate, effective property tax rate, and the BEA all-items Regional Price Parity across Illinois and its border states.
| State | Median home | Top inc tax | Prop tax rate | RPP (US=100) |
|---|---|---|---|---|
| Illinois (this page) | $275,000 | 4.95% | 2.23% | 98.8 |
| Indiana side-by-side | $235,000 | 3.00% | 0.85% | 92.1 |
| Iowa | $215,000 | 3.80% | 1.50% | 88.8 |
| Kentucky side-by-side | $205,000 | 4.00% | 0.83% | 89.9 |
| Michigan side-by-side | $245,000 | 4.25% | 1.58% | 94.3 |
Sources: Zillow ZHVI[1], state Departments of Revenue / Tax Foundation[2], Tax Foundation property taxes[3], BEA Regional Price Parities[4].
These calculators share inputs with the mortgage payment formula, so pair them to pressure-test your answer from multiple angles.
| Metric | Illinois | National Avg | IN | IA | KY |
|---|---|---|---|---|---|
| Median Home Price | $275,000 | $420,000 | $265,000 | $245,000 | $265,000 |
| Property Tax Rate | 2.23% | 1.07% | 0.85% | 1.57% | 0.85% |
| State Income Tax | 4.95% | 4.6%* | 3.23% | 5.7% | 5% |
| Avg Insurance Cost | $1,310/yr | $1,544/yr | $1,320/yr | $1,320/yr | $1,440/yr |
| Cost of Living Index | 98.8 | 100 | 90 | 87 | 88 |
| Household Income — p25 | $41,110 | $41,401 | $40,488 | $45,807 | $31,035 |
| Household Income — p50 (median) | $84,105 | $83,592 | $76,200 | $85,000 | $64,553 |
| Household Income — p75 | $158,064 | $153,000 | $135,377 | $135,696 | $122,016 |
*Average of states that levy an income tax. 2026 estimates. Illinois exempts ALL retirement income from state tax — one of the most retirement-friendly policies in the U.S.[3] Income percentiles from DQYDJ/Census CPS 2024[4].
Illinois has a split personality: Chicago metro has higher prices ($350-500K+) while downstate median homes are $150-250K.
Illinois' effective property tax rate of 2.23% (varies by county, state avg ~0.85% in our data) is among the highest in Cook County.
The Illinois Housing Development Authority (IHDA) offers multiple down payment assistance programs.
Illinois is a judicial foreclosure state — the process takes 12-18 months, giving homeowners time to negotiate.
Every number on this page reads from the same CalcFi data repository used by the Live Data pages below — the figures stay consistent.
Home Prices by State
Zillow ZHVI across all 50 states
Property Tax by State
Effective rate × ZHVI = annual bill
Household Income by State
FRED real median + percentile bands
Cost of Living by State
BEA RPP all-items + housing
No-Income-Tax States
Full list + trade-offs
Current Interest Rates
Treasury curve + PMMS + FDIC
CalcFi pSEO pages combine three inputs: (1) the calculator formula itself, which runs client-side so no inputs leave your browser; (2) state-level financial constants from primary public datasets; and (3) national benchmarks for comparison. The Illinois page uses the property tax rate (2.23%), median home price ($275,000), and 4.95% state income tax from the sources listed below.
Refresh cadence:state tax brackets and minimum wage rates are reviewed annually after each state's legislative session. Property tax, median home price, insurance, and cost-of-living figures are reviewed annually against the primary sources. Income percentiles are refreshed when the Census CPS/IPUMS releases update (typically September). Page-level dateModified matches the last editorial review date, shown above.
Known limits: statewide averages mask large intra-state variance — county-level property tax and metro-level home prices differ significantly from the figures shown. For the most precise calculations, cross-check the output against your actual county assessor and the latest federal/state tax tables at filing time.
Use Mortgage Payment Calculator for any city in Illinois.
Every number on this page cites a primary public dataset. Last reviewed (auto-bumped by the next ISR refresh after an ETL run).
CalcFi does not sell data. If you spot an error, email hello@calcfi.app with the URL and the correct figure.