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% and no standard deduction. The 2026 basic exemption is $2,925 per eligible person. The allowance is unavailable above $500,000 in federal adjusted gross income for joint filers or $250,000 for other filing statuses.
Sales Tax
Illinois ended its 1% state grocery tax on January 1, 2026. Municipalities and counties can adopt a 1% local grocery tax. Regional transit or Metro East taxes can still apply where applicable. Combined rates shown are population-weighted July 1, 2026 estimates; actual item and local rates vary.
Illinois’s ordinary flat income-tax rate is 4.95%; its combined sales tax rate of 8.98% (July 1, 2026 population-weighted estimate) is among the highest in the nation.
What is Illinois's income tax rate?
Illinois has a flat income tax rate of 4.95% on all taxable income. The state constitution mandates a flat rate structure.
Does Illinois tax groceries?
Illinois ended its 1% state grocery tax on January 1, 2026. Municipalities and counties can adopt a 1% local grocery tax. Regional transit or Metro East taxes can still apply where applicable.
Does Illinois have a standard deduction?
Illinois has no standard deduction. The 2026 basic exemption is $2,925 per eligible person, subject to income and dependent rules.
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