Illinois Tax Calculators.
Tax year 2026 income tax rates, brackets, and sales tax for Illinois. Returns for tax year 2026 are generally filed in 2027; source links and last-verified dates are shown below.Tax year 2026 means income earned during calendar year 2026; those returns are generally filed in 2027. State and local sales tax rates can change during the year, so confirm current rules before filing or remitting tax.
Income Tax
Illinois has a flat income tax rate of 4.95% on all taxable income. Unlike most states, Illinois does not offer a standard deduction but provides personal exemptions. A 2020 ballot measure to switch to progressive rates was defeated by voters.
Sales Tax
Groceries are taxed at reduced 1% rate. Prescription drugs are exempt. Clothing is taxable.
Illinois' 4.95% flat rate is moderate nationally. However, combined with high property taxes (averaging ~2.07%, second highest nationally) and high sales tax, the overall tax burden is significant.
Does Illinois have a flat or progressive tax?
Illinois has a flat income tax of 4.95%. A 2020 ballot measure to adopt progressive rates was rejected by voters.
What is the sales tax in Illinois?
Illinois has a 6.25% state sales tax. With local taxes, the average combined rate reaches about 8.82%, among the highest in the nation.
Are groceries taxed in Illinois?
Groceries (qualifying food and drugs) are taxed at a reduced state rate of 1% instead of the full 6.25%. Local taxes may still apply.