Moving to Illinois

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Quick facts

Population12,719,141
State income tax4.95%
Avg. effective property tax1.88%
State sales tax6.25% (6.25%–10.25% combined)

Illinois's single most distinctive, relocation-relevant tax fact is the real, substantial GAP between how it taxes working income and retirement income: a simple, moderate flat 4.95% tax on wages sits alongside a genuine, no-threshold exemption of ALL retirement income -- Social Security, pensions (public or private), and 401(k)/IRA distributions are all completely untaxed by Illinois, a real, substantial positive for retirees this record does not let Illinois's other genuine fiscal negatives bury. And those negatives are real and substantial: Illinois's statewide average effective property tax rate (1.88%, per Tax Foundation's 2026 figure) is tied with New Jersey for the highest in the nation, running meaningfully higher still in Cook County; Illinois's sales tax is not one number either, with a 6.25% state base and local add-ons pushing Chicago's own combined rate to a real, genuinely high 10.25%. Illinois's fiscal health carries a real, current, and genuinely two-sided story: a substantial, unresolved $143.5 billion unfunded state pension liability (the largest of any US state, per the Illinois Commission on Government Forecasting and Accountability) sits alongside real, recent fiscal improvement -- Moody's upgraded Illinois's credit rating a full notch to A2 in October 2025, Illinois's best rating in more than 20 years, even as Illinois remains the nation's lowest-rated state. Illinois's population picture is similarly two-sided: a real third consecutive year of statewide growth (+16,108 residents, 2024-2025) has not yet recovered Illinois's population back to its 2020 census count, and that recent growth is driven substantially by international immigration and natural increase outweighing a real, third-worst-in-the-nation net domestic outmigration (roughly 40,017 residents in the same period) -- this record discloses every piece of that honestly rather than choosing the flattering half. Illinois's most distinctive, currently active weather risk is not winter severity but a real, escalating 2026 tornado season: Illinois recorded 202+ confirmed tornadoes, becoming just the second state ever (after Texas) to cross 200 in a single year, plus a real, damaging August 11, 2026 derecho across the state's north -- a real, rising homeowners-insurance cost driver genuinely different from a hurricane or wildfire risk profile. Chicago anchors Illinois's economy by a wide margin -- a 2,731,585-resident city at the core of a roughly 9.4-million-resident metro, home to Caterpillar, Abbott/AbbVie, Walgreens Boots Alliance, McDonald's, Allstate, United Airlines, and Exelon -- but Chicagoland is genuinely not one market: the affluent, Northwestern-adjacent North Shore, the family-suburb 'Tri-Cities' corridor (Naperville regularly lands on national best-places lists), and the more affordable southwest suburbs each carry distinct identities. Downstate Illinois is likewise several separate regions, not one 'rest of the state' bucket: the Champaign-Urbana/Bloomington-Normal college-town corridor is a real, current growth bright spot (University of Illinois's record 56,299 enrollment; State Farm and Rivian anchoring Bloomington-Normal) set against DeKalb's real, disclosed population decline; the Metro East is genuinely oriented toward St. Louis rather than Chicago; the Quad Cities' Illinois side (Moline) shares a binational metro with Davenport, Iowa and hosts Deere & Company's headquarters; Rockford carries an honest post-manufacturing recovery story; and Springfield, the state capital, carries a real, distinct Lincoln-heritage tourism identity. Illinois's statewide housing costs run genuinely, meaningfully below the national average (Zillow's $294,136 vs. the national $371,774), though this record does not let that statewide figure paper over the real regional spread between Chicago's pricier suburbs and much more affordable downstate markets.

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The tradeoffs

Pros

A real, substantial, and genuinely distinctive retirement-income tax exemption -- Illinois taxes NONE of a retiree's Social Security, pension, or 401(k)/IRA income, with no age or income threshold -- paired with a simple, moderate flat 4.95% tax on wages; genuine statewide housing affordability relative to the national average (roughly 16%-21% below national figures depending on measure); a large, genuinely diversified Fortune-500-dense job market anchored by Chicago (Caterpillar, Abbott/AbbVie, Walgreens Boots Alliance, McDonald's, Allstate, United Airlines, Exelon) plus distinct regional anchors elsewhere (Deere & Company in the Quad Cities, State Farm and Rivian in Bloomington-Normal); major research universities (University of Illinois, Northwestern, University of Chicago) and O'Hare International Airport's real global-connectivity advantage; real, recent fiscal improvement (Moody's October 2025 upgrade to A2, Illinois's best credit rating in 20+ years); and a genuinely distinct set of regional identities -- from the affluent North Shore to Naperville's nationally-recognized family-suburb reputation to Springfield's Lincoln-heritage tourism identity -- that this record does not flatten into one Chicago-shaped story.

Cons

A real, substantial statewide property tax burden tied for the highest average effective rate in the nation (1.86%-2.08% depending on source), running meaningfully higher still in Cook County, with no assessment cap to soften rising values; a genuinely high combined sales tax in Chicago specifically (10.25%, among the highest of any major US city) layered on top of that property-tax burden; a real, substantial, and still-unresolved $143.5 billion unfunded state pension liability -- the largest of any US state -- that persists even after Illinois's real, recent credit-rating improvement, leaving Illinois the nation's lowest-rated state despite genuine progress; a real, disclosed, and currently escalating severe-weather insurance risk driven by Illinois's record 2026 tornado season (202+ confirmed tornadoes) and an August 2026 derecho, with sourced 2026 premium figures already elevated and projected to keep rising faster than the national average; a real, disclosed net domestic outmigration (third-worst in the nation) that Illinois's modest recent population growth depends on international immigration and natural increase to outweigh, rather than broad-based domestic in-migration; and real, disclosed exceptions to Illinois's growth story within its own borders, most notably DeKalb's substantial, sourced population decline even as Champaign-Urbana and Bloomington-Normal grow.

Taxes

Illinois's top state income tax rate is 4.95% (Illinois Department of Revenue; Wealthvieu, "Illinois Income Tax Guide 2026: Flat Tax Rate & Filing Tips"; CountryTaxCalc, "Illinois Income Tax Guide 2026: 4.95% Flat Rate, Full Breakdown"; CPA Validated, "Illinois Income Tax: Flat 4.95% Rate, Retirement Income Exemption & Chicago Tax (2026)"; Taxstra, "Does Illinois Tax Retirement Income? 2026 Guide"). The statewide average effective property tax rate is 1.88%, though this varies significantly by county -- from 1.86% to 2.08%. A reliable statewide median annual property tax bill is not yet sourced.

Insurance

Illinois's homeowners-insurance risk profile carries no hurricane risk and no meaningful earthquake or wildfire-insurer-availability crisis of the kind disclosed in California's or Idaho's records -- but Illinois carries real, genuine, and currently escalating severe-weather risk this record does not omit or undersell. 2026 was one of the most active tornado seasons on record nationally, and Illinois became just the second state ever (after Texas's standing 244-tornado record set in 2015) to record more than 200 confirmed tornadoes in a single year -- 202 confirmed as of mid-August 2026 (203 per at least one late-August recount), far surpassing Illinois's own prior annual record of 142 tornadoes set in 2024. A real, damaging derecho swept northern Illinois and northwest Indiana on August 11, 2026, producing 70-to-100+ mph straight-line winds and additional confirmed tornadoes on top of the year's already-record tornado count. Illinois also carries real, historically significant Mississippi and Illinois River flood risk in the state's historic river towns (Alton, Quincy specifically). This is a real, current, and directly documented homeowners-insurance cost driver -- see trendNote for the real, sourced premium-increase trend directly tied to this severe-weather pattern. Sourced 2026 average premium figures span a real, disclosed range of roughly $2,402 to $3,108/year depending on source and coverage assumptions (see noReliableSinglePremiumFigureNote).

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Sources & last reviewed: 2026-08-26. Independent research; see individual metric entries for source attribution. This is not financial, tax, or legal advice.