Illinois is one of the most tax-friendly states for retirees. The state doesn't tax Social Security benefits, pension income, or distributions from retirement accounts (IRAs, 401ks). However, Illinois has a flat 4.95% income tax on earned income and some of the highest property taxes in the nation.
Illinois exempts all retirement income from the state income tax. This includes Social Security benefits (at any income level), distributions from IRAs and 401(k)s, pension income from private and government plans, and most annuity income. For retirees whose income comes entirely from these sources, the Illinois income tax bill is effectively zero, a significant advantage compared to states like Minnesota, Vermont, or Missouri that tax retirement income at graduated rates.
The flat 4.95% income tax does apply to earned income, wages, self-employment income, and consulting fees. If you're semi-retired and earning income from part-time work or a business, that portion is taxable. Capital gains are also taxable in Illinois at the same 4.95% flat rate, there's no preferential capital gains rate in Illinois. For business sellers, this means a gain taxed at 20% federally also carries a 4.95% Illinois tax.
Property taxes are where Illinois bites back. Cook County, Lake County, and DuPage County consistently rank among the highest property tax rates in the nation. For a family in Winnetka or Northbrook with a $1.2 million home, property taxes of $20,000-$30,000 per year aren't unusual. Illinois does offer the Senior Citizens Homestead Exemption (an additional $8,000 assessed value reduction for homeowners aged 65+) and the Senior Freeze program (which freezes the assessed value for qualifying low-to-moderate income seniors).
The Illinois estate tax is also relevant for wealthier retirees. Illinois has its own estate tax with a $4 million exemption, much lower than the federal exemption of approximately $13.6 million in 2026. This means estates between $4 million and $13.6 million owe Illinois estate tax even if they owe nothing federally. For Northern Suburbs residents with significant real estate and investment portfolios, Illinois estate tax planning is an essential part of the overall strategy.
Key facts
- Illinois income tax: flat 4.95%, applies to earned income and capital gains; does NOT apply to Social Security, IRA/401k distributions, pension income, or most annuity income
- Illinois estate tax: 4 million exemption (in 2026); applies to estates above that threshold; top rate 16%
- Senior Citizens Homestead Exemption: additional $8,000 assessed value reduction for homeowners aged 65+
- Senior Citizens Assessment Freeze: freezes assessed value for seniors with household income below a set threshold, helps limit property tax growth
- Capital gains taxed at 4.95% flat rate, no preferential capital gains rate in Illinois
- Illinois doesn't have an inheritance tax, heirs pay no Illinois tax on assets they receive
Should I move out of Illinois for tax reasons in retirement?
The math depends entirely on your income sources and lifestyle. If your income is entirely from Social Security, IRAs, and pensions, Illinois already taxes none of it, and moving to Florida or Texas doesn't change your federal tax bill. Where relocation saves real money is on property taxes (moving from a $25,000/year Cook County property to a $5,000/year Sun Belt home saves $20,000/year) or on capital gains from a business sale or investment portfolio. We model the full picture, including housing costs, healthcare access, and social considerations, before recommending relocation.
Does Illinois tax inherited IRAs?
No. Inherited IRA distributions are exempt from Illinois income tax just like regular IRA distributions. Beneficiaries who receive inherited IRAs and take the required distributions over 10 years (per SECURE Act rules) owe only federal income tax on those distributions, not Illinois tax.
