Illinois Tax Tables for 2026
The 2026 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 2026.
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Illinois Tax Tables for 2026
The tables below outline the income tax structure, deduction amounts, state-level credits and payroll-related rules used for Illinois in 2026. 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 (2026)
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 (2026)
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 (2026)
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 (2026)
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 (2026)
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(2026)
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 |
Recent Updates – Illinois State Tax
The following summarizes key legislative and administrative changes affecting the 2026/27 Illinois tax year and subsequent filings:
- Flat Income Tax Rate Maintained – The statewide flat income tax remains 4.95% for individual and corporate taxpayers. Proposed rate increases were deferred pending budget review, providing rate stability for 2026/27.
- Expanded Earned Income Credit (EIC) – Beginning with returns filed for 2026/27, the Illinois EIC has been permanently increased to 20% of the federal credit, offering continued support for lower- and moderate-income families.
- New Withholding & Filing Automation via MyTax Illinois – The Department of Revenue has rolled out a streamlined employer dashboard for filing Form IL-941 and associated withholding returns electronically. Bulk upload and auto-calculation features are now available for small and mid-sized employers.
- Updated Retirement Income Guidelines – Clarification issued for Schedule M confirming that distributions from IRAs, 401(k)s, and pensions remain fully exempt from Illinois income tax, provided they were federally taxed.
- Education Expense Credit Expansion – The Illinois Education Expense Credit has been indexed for inflation starting with tax year 2026/27, raising the maximum allowable credit to $850 per qualifying household.
- Withholding Modernization – As of March 2026/27, the Illinois Department of Revenue has mandated use of standardized withholding identifiers for all filers submitting Form IL-W-4 or Form IL-W-4-NR, improving cross-form consistency and electronic reporting accuracy.
These changes reinforce Illinois’ commitment to simplifying compliance, promoting transparency in employer reporting, and providing sustained relief for working families. All calculators have been updated to reflect current credits, withholding requirements, and rate applications for 2026/27.
Illinois Tax Tables for Related Years
These related years are often reviewed together for comparing bracket changes, deductions and Illinois updates:
Frequently Asked Questions
Mortgage vs take-home planning
Try the Mortgage Calculator and revisit this IL page.
Where do I mail the completed IL-1040-V and payment?
Mail the completed voucher and payment to the address printed on the voucher (Illinois Department of Revenue, Springfield IL 62726-0001) unless told otherwise during filing.
Do charitable gifts affect IL tax?
IL doesn’t mirror federal itemized deductions; charitable gifts matter federally, not typically for IL base.
Why don’t my payroll brackets match?
Employer systems use rounding/timing and supplemental methods; small variances are normal.
Does Illinois tax Social Security or pension income?
No. Illinois exempts most retirement income—including Social Security, pensions, and IRA withdrawals—from state income tax. These subtractions are reported on Schedule M.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.