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Interstate Relocation: Connecticut → Illinois

Moving from Connecticut to Illinois: Cost & Tax Comparison

Compare state income tax savings, HUD rent differentials, and household purchasing power adjustments when relocating from Connecticut to Illinois.

Data updated · Sources: HUD FY 2027 Fair Market Rents, EPI 2026 Family Budget, 2026 tax tables · Methodology

Effective Tax Rate Change -0.2 pts IL vs CT, $100k single
Annual Tax Savings +$170 Federal + FICA + state, $100k
1BR Rent Change -35.9% Avg 1BR $1,053 vs $1,642/mo
Net Annual Difference +$7,240 Tax savings + 1BR rent savings

What changes when you move from Connecticut to Illinois

Connecticut has graduated income tax rates up to 6.99% and Illinois has a flat 4.95% income tax. On a $100,000 salary a single filer pays $4,975 in state income tax in Connecticut and $4,805 in state income tax in Illinois. With federal income tax and FICA unchanged, total tax falls by $170 a year after the move. HUD's one-bedroom Fair Market Rent averages $1,642 a month across Connecticut's metro areas and $1,053 across Illinois's (-35.9%). Pay differs too: the BLS median wage across all occupations, weighted by employment in each state's metros, is $59,279 in Connecticut and $54,104 in Illinois. City and county income taxes, which some localities add, are not included in these state-level figures; the metro routes below include them.

Origin State: Connecticut

Connecticut Paycheck & Living Costs

Paycheck Living Cost Salaries
Destination State: Illinois

Illinois Paycheck & Living Costs

Paycheck Living Cost Salaries
Reverse Corridor Analysis:
Moving from Illinois to ConnecticutNational Relocation Hub

Metropolitan Corridors Between Connecticut & Illinois

Hartford-West Hartford-East Hartford, CT → Chicago-Naperville-Elgin, IL-IN On $100k: $170 less tax and $2,844 more 1BR rent a year
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Hartford-West Hartford-East Hartford, CT → Peoria, IL On $100k: $170 less tax and $6,984 less 1BR rent a year
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Bridgeport-Stamford-Danbury, CT → Chicago-Naperville-Elgin, IL-IN On $100k: $170 less tax and $3,492 less 1BR rent a year
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Bridgeport-Stamford-Danbury, CT → Peoria, IL On $100k: $170 less tax and $13,320 less 1BR rent a year
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Moving from Connecticut to Illinois: Cost & Tax Comparison Overview

Moving from Connecticut to Illinois on a $100,000 salary: pay $170 less in total taxes per year; average one-bedroom rent is $1,053 vs $1,642 a month (HUD FMR).

Quick answers
How much money will I save moving from Connecticut to Illinois?

For a single filer earning $100,000 with no local income tax, total federal, FICA and state taxes are $170 lower in Illinois than in Connecticut (0.2 percentage points of gross pay). The average HUD one-bedroom Fair Market Rent across Illinois's metros is $1,053 a month, versus $1,642 in Connecticut (-35.9%). Taxes and one-bedroom rent combined change by +$7,240 a year.

What are the key tax differences between Connecticut and Illinois?

Connecticut: Graduated Brackets, top rate 6.99%. Illinois: Flat Tax, top rate 4.95%. Federal income tax and FICA are the same in both states.