Illinois Tax Tables for 2024
The 2024 Illinois Tax Tables summarise the state-level rules applied to wages, deductions, credits and taxable income. These tables match the rules used by the Illinois State Tax Calculator 2024.
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Illinois Tax Tables for 2024
The tables below outline the income tax structure, deduction amounts, state-level credits and payroll-related rules used for Illinois in 2024. Illinois applies a flat income tax to this filing status. All taxable income is taxed at the same rate, with no marginal brackets. This table shows the single rate used in calculations. To understand how flat tax tables differ from progressive systems, see our Tax Tables guide.
Single – Flat Income Tax (2024)
A single flat tax rate applies to all taxable income for Single filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 4.95% |
Married filing jointly – Flat Income Tax (2024)
A single flat tax rate applies to all taxable income for Married filing jointly filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 4.95% |
Married filing separately – Flat Income Tax (2024)
A single flat tax rate applies to all taxable income for Married filing separately filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 4.95% |
Head of household – Flat Income Tax (2024)
A single flat tax rate applies to all taxable income for Head of household filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 4.95% |
Widowed – Flat Income Tax (2024)
A single flat tax rate applies to all taxable income for Widowed filers.
| Bracket | Range | Rate |
|---|---|---|
| 1 | 0 and over | 4.95% |
Illinois Standard Deduction(2024)
State-level standard deduction amounts for each filing status.
| Filing Status | Amount |
|---|---|
| Single | $0 |
| Married filing jointly | $0 |
| Married filing separately | $0 |
| Head of household | $0 |
| Widowed | $0 |
Illinois Tax Tables for Related Years
These related years are often reviewed together for comparing bracket changes, deductions and Illinois updates:
Frequently Asked Questions
Why is Schedule M important for accurate Illinois taxes?
Illinois uses Schedule M to ensure fairness in applying its flat 4.95% tax rate. Because Illinois starts from federal AGI, this form ensures only Illinois-approved income is taxed and proper deductions are applied. It’s especially vital for retirees, military personnel, and taxpayers with multistate investments.
What types of credits appear on Schedule 1299-A?
Credits include the Research and Development Credit, Angel Investment Credit, Live Theater Production Credit, and other specific economic development credits approved by Illinois law. These credits are often carried forward from prior years or passed through from partnerships via Schedule K-1-P.
What is Schedule M used for on the Illinois return?
Schedule M lists additions and subtractions that adjust your federal adjusted gross income (AGI) to determine Illinois taxable income. Additions include items like federally exempt interest income, while subtractions include Social Security benefits, most retirement income, and federally taxed municipal bond interest.
How do I claim the Property Tax Credit?
To claim the Property Tax Credit, you must have paid Illinois property taxes on your principal residence (not rental or vacation property). You can only claim the portion paid in 2024 for the prior assessment year. Enter the exact amount from your property-tax bill on Schedule ICR, Line 5, and attach proof of payment if filing on paper. The credit equals 5 % of eligible property-tax paid.
Quick FICA sanity check
Use the FICA Calculator and compare against this page.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.