State tax rates and rules for income, sales, property, estate, and other taxes that impact retirees. Go to Retiree Tax Map Illinois Add to State Compare List | View List View State Compare List (0) selected | Compare up to 5 The Bottom Line Least Tax-Friendly There is some good tax news for retirees in Illinois: Social Security benefits and income from most retirement plans are exempt. Plus, the state's 4.95% flat income tax rate is relatively low.Now for the bad news: Property taxes hit retirees hard in Illinois. The statewide median property tax rate in Illinois is the second-highest in the nation. Fortunately, there is some relief for seniors in the form of a homestead exemption of up to $5,000 ($8,000 in Cook County), the ability to "freeze" a home's assessed value (must have income of $65,000 or less), and a tax deferral program.Sales tax rates are high in Illinois, too. The state has the seventh-highest average combined state and local sales tax rate at 8.82%. Illinois also has an estate tax, which can be bad news for your heirs. Income Tax Range Illinois has a flat rate of 4.95% of federal adjusted gross income after modifications. Taxation of Social Security Benefits Social Security benefits are not taxed by the state. Tax Breaks for Other Retirement Income Income from most retirement plans is exempt, including payments from qualified employee benefit plans (including 401(k) plans and traditional pensions), government retirement plans, military pensions, and IRAs.Railroad Retirement benefits are also exempt. Sales Tax 6.25% state levy. Localities can add as much as 4.75%, and the average combined rate is 8.82%, according to the Tax Foundation.Groceries: Taxable (1% state rate; additional local taxes may apply)Clothing: TaxableMotor Vehicles: TaxablePrescription Drugs: Taxable (1% state rate; additional local taxes may apply) Real Property Taxes In Illinois, the median property tax rate is $2,165 per $100,000 of assessed home value. Illinois residents who are at least 65 years old are eligible for a homestead exemption of up to $5,000, and $8,000 in Cook County. Seniors with household income of $65,000 or less can get their property's assessed value frozen. Additionally, they can defer property-tax payments. Annual Car Taxes and Fees An annual vehicle registration fee is imposed. Estate and Inheritance Taxes Illinois has an estate tax with a $4 million exemption. Estate tax rates are from 0.8% to 16%.