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
Budgeting in Illinois starts with understanding that the cost of living index of 98.8 directly impacts every spending category. Illinois's cost of living at or below average gives residents more budgeting flexibility. State income tax of 4.95% reduces your take-home pay — make sure your budget reflects net (after-tax) income, not gross. Property tax at 2.23% and homeowners insurance averaging $1,310/year are fixed costs that homeowners in Illinois must account for. The 50/30/20 guideline (needs/wants/savings) is a useful starting point, adjusted for Illinois's specific cost profile.
Cost-of-living index and median income anchor the budget math for the budget planner in Illinois. Every row cites a primary public dataset. Numbers reflect the most recent vintage available; refresh cadence is documented in the methodology.
Your budget planner in Illinois is driven by the BEA Regional Price Parity (RPP) — a purchasing-power index where US = 100. The all-items RPP tells you how far a dollar goes statewide vs the national average; housing-only RPP isolates the rent/mortgage side, which is the single biggest budget line for most households[1].
When the all-items RPP is above 100, the same expense basket costs more to maintain in Illinois. The 50/30/20 rule (needs/wants/savings) bends toward needs in high-RPP states and toward savings in low-RPP states.
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 |
|---|---|---|---|---|
| Chicago, IL | $344,687 | $2,180/mo | $2,000/mo | $88,850 |
| Rockford, IL | $213,900 | $1,234/mo | $1,125/mo | $66,571 |
| Peoria, IL | $164,790 | $1,155/mo | $1,075/mo | $70,872 |
| Naperville, IL | $485,000 | $1,800/mo | $1,650/mo | $125,800 |
| Joliet, IL | $240,000 | $1,250/mo | $1,150/mo | $68,500 |
Sources: Zillow ZHVI + ZORI[1], HUD FMR[2], Census ACS[3], Freddie Mac PMMS[4].
Moving one state over changes the budget planner 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 equivalent | $235,000 | 3.00% | 0.85% | 92.1 |
| Iowa side-by-side | $215,000 | 3.80% | 1.50% | 88.8 |
| Kentucky equivalent | $205,000 | 4.00% | 0.83% | 89.9 |
| Michigan equivalent | $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 budget planner 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].
Track take-home pay: 4.95% state income tax plus federal + FICA reduces gross wages by roughly 30% in Illinois.
Anchor savings goals to the Illinois cost of living index (98.8). A national 20% savings rate needs adjustment up or down depending on local expense floors.
Use tax-advantaged accounts first: 401(k), HSA, IRA. Contributions to pre-tax accounts save 4.95% at the state level plus your federal marginal rate.
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 Budget Planner 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.