Retirement Calculator in Illinois

Plan your retirement savings in Illinois. Uses local cost of living (index: 95) and 4.95% state income tax to project how much you need. Formula shown, sources cited — no account required.

Retirees here enjoy one of the most favorable tax environments in the country. All retirement income is exempt from state income tax, including Social Security benefits, pension payments, IRA withdrawals, and 401(k) distributions. That broad exemption means a retiree drawing entirely from retirement accounts pays zero state income tax on that income, regardless of amount. This is a significant advantage for high-balance savers who would face meaningful state tax in neighboring states like Indiana or Wisconsin. Cost of living runs 5% below the national average, which adds further stretch to a retirement budget. Property taxes are the main counterweight — at 2.27%, a paid-off home still generates a sizable annual tax bill. A homeowner whose house is worth $314,000 owes roughly $7,128 per year. Some counties offer senior freeze programs that lock property assessment values, providing relief for longtime homeowners on fixed incomes. The combination of zero retirement income tax and below-average costs makes this state attractive for savers — use the retirement calculator to see how your withdrawal strategy plays out here.

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Illinois Retirement Planning Facts (2026)

Cost of Living Index

$83K

Median Household Income

4.95%

State Income Tax

$1,664K

Est. Nest Egg Needed

Illinois Retirement Tax Status

Retirement income exempt

State income tax (top rate)4.95%

Cost of living vs. national avg5.0% less expensive

Median household income$83,211/yr

Retirement Planning in Illinois: What You Need to Know

Retirement planning in Illinois requires factoring in the state's unique combination of cost of living, tax treatment of retirement income, and local income levels. Illinois's cost of living index of 95 means that a dollar goes further in Illinois than in most other states, which directly affects how much nest egg you need.

Using the 4% withdrawal rule and an 80% income replacement target, a Illinois household earning the median $$83,211 needs approximately $1,664K in investable assets to retire comfortably. Social Security benefits — averaging $1,700–$1,900/month per recipient — offset this requirement.

Illinois vs. National Retirement Benchmarks

Metric	Illinois	National Avg
Median Household Income	$83,211	$74,580
Cost of Living Index	95	100
State Income Tax (top)	4.95%	~5.5%
Est. Nest Egg Needed (4% rule)	$1,664K	$1,490K

Traditional vs. Roth Accounts in Illinois

In Illinois, traditional 401(k) and IRA contributions reduce both your federal and state taxable income (4.95% top rate). Roth contributions provide tax-free growth but no upfront deduction. If you expect to stay in Illinois in retirement, Roth accounts can be attractive if you anticipate being in a similar or higher tax bracket later — you pay 4.95% state tax now in exchange for zero state tax on future withdrawals.

Questions You Might Ask — Retirement Calculator in Illinois

Does Illinois tax retirement income?

Retirement income exempt Illinois's top state income tax rate is 4.95%. Depending on your income sources, this can reduce your net retirement income meaningfully — factor this into your retirement income projections.

How much do I need to retire in Illinois?

Based on Illinois's median household income of $83,211 and a cost of living index of 95 (national average = 100), a comfortable retirement in Illinois typically requires $66,569/year in income (80% replacement rule). Using the 4% withdrawal rule, that implies a nest egg of approximately $1,664K. Illinois's cost of living is close to the national average.

What is the cost of living in Illinois for retirees?

Illinois's cost of living index is 95 compared to the national average of 100. This means living in Illinois costs approximately 5.0% less than the national average — a meaningful advantage for retirees stretching fixed incomes. Key drivers of retirement costs include housing, healthcare, transportation, and groceries.

What is the 4% rule and how does it apply in Illinois?

The 4% rule (Bengen Rule) states that retirees can safely withdraw 4% of their portfolio in year one, then adjust for inflation annually, with low risk of running out of money over a 30-year retirement. In Illinois, if you need $66,569/year in retirement income, the 4% rule suggests accumulating $1,664K in investable assets. This figure should be adjusted up for your specific lifestyle and down for Social Security benefits, pensions, or part-time income.

How does Illinois's income tax affect retirement savings?

Illinois's top state income tax rate of 4.95% applies to most ordinary income, including 401(k) and traditional IRA withdrawals. Consider whether Roth accounts (which provide tax-free withdrawals) or traditional pre-tax accounts are optimal given your expected retirement income level in Illinois.

Data Sources & Methodology

Cost of living data from the Council for Community and Economic Research (C2ER). State income tax rates from the Tax Foundation. Median household income from U.S. Census Bureau ACS. Retirement income needs calculated using the 80% replacement rate and 4% withdrawal rule. Last updated 2026.