Tax Calculator Illinois, United States - 2025-2026

About Illinois, United States

Illinois operates with a flat income tax system, meaning all taxpayers pay the same 4.95% rate regardless of income level, providing simplicity but offering no progressive rate relief for lower-income taxpayers. The state tax code is relatively straightforward compared to states with progressive systems, but Illinois's decision to tax retirement income and its exceptionally high property taxes create significant planning considerations for residents. Illinois has been working to improve its fiscal stability following the state's extended budget impasse in 2015-2017, with recent budgets including structural reforms and full pension contributions. The state faces significant long-term fiscal challenges from its $140 billion in unfunded pension liabilities, which have contributed to credit rating downgrades and higher borrowing costs. Illinois's tax system includes several credits designed to provide relief for lower and middle-income families, including the Illinois Earned Income Credit and the Property Tax Credit. The state has also implemented an expanded Child Tax Credit of $700 per child for low-income families beginning in 2024. Illinois is one of the few states that imposes a Personal Property Tax Replacement Income Tax on corporations, partnerships, and trusts, with rates of 1.5% on business income.

Illinois, United States Income Tax Calculator

Estimate your income tax liability for 2025-2026 in Illinois, United States. Enter your income, deductions, and filing status to get an accurate tax estimate.

Tax Brackets and Rates in Illinois, United States

Illinois, United States tax brackets for 2025-2026 range from basic rate to top marginal rate. Our calculator applies progressive taxation with applicable deductions and credits.

Illinois Key Financial Data at a Glance

Illinois, United States residents and job seekers should understand the local financial landscape. The table below shows key economic indicators for Illinois, including income levels, tax burdens, housing costs, and the overall cost of living index. This data helps you compare Illinois with other states and make informed decisions about relocation, employment, and home buying. All figures are based on the most recent available data from the Bureau of Labor Statistics, US Census Bureau, and state revenue departments.

Illinois, United States Tax Information

Illinois's flat income tax rate is 4.95% on all taxable income for individuals, trusts, and estates. The state does not allow a standard deduction but provides a personal exemption of $2,425 per person. Illinois taxes most retirement income including pension distributions, 401(k) withdrawals, IRA distributions, and annuity payments as ordinary income. The state offers several significant tax credits: the Illinois Earned Income Credit at 20% of the federal EITC, the Property Tax Credit of 5% of property taxes paid (up to $500 maximum), and the Child Tax Credit of $700 per child for households earning under $50,000. The state sales tax rate is 6.25%, with local jurisdictions adding up to 4.75% for combined rates reaching 11.00% in Chicago (including the city's 1.25% home rule tax, 1.75% county tax, and 0.25% transit tax on top of the 6.25% state rate). The estate tax exemption is $4 million, substantially lower than the federal $13.61 million exemption, with rates up to 16%. Illinois does not allow a deduction for federal income taxes paid on state returns. Property taxes average 2.07% of market value, the second-highest in the nation, with significant regional variation from under 1.5% in Cook County to over 3% in some downstate counties.

Sources: Bureau of Labor Statistics, US Census Bureau, state revenue departments (2024). Figures are estimates and may vary by source and year.