Illinois Schedule IL-WIT – Illinois Income Tax Withheld (2026)
Last reviewed: 2025-11-07
Use the Illinois Tax Form Calculator Schedule IL-WIT: Illinois Income Tax Withheld as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 Illinois state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.
Schedule IL-WIT is used to verify and reconcile Illinois income tax withheld as reported on your Form IL-1040. It summarizes withholding from wages (Forms W-2), pensions (Forms 1099-R), and pass-through income (Schedules K-1-P or K-1-T). This ensures the total Illinois tax withheld matches Department of Revenue records and properly credits your return.
When to File Schedule IL-WIT
Attach Schedule IL-WIT if you:
- Report Illinois income tax withheld from multiple sources, such as wages, pensions, or partnership income.
- Are claiming Illinois withholding shown on K-1-P, K-1-T, or 1099 forms.
- Need to reconcile withholding that does not appear on your W-2 due to amended reporting or adjustments.
Completing Schedule IL-WIT
- Enter each source of Illinois income and the corresponding amount withheld.
- List W-2, 1099, K-1-P, and K-1-T amounts separately for transparency.
- Total all withholding and ensure it matches Line 25 of Form IL-1040.
- If the total withholding exceeds the calculated tax liability, the overpayment is eligible for refund.
Each entry should include the payer’s name, FEIN, income type, and amount withheld. The total is used to calculate your Illinois tax balance or refund due.
| 1 | W-2 withholding from Illinois employers | |
| 2 | 1099-R withholding (pensions, annuities) | |
| 3 | K-1-P or K-1-T withholding from pass-through entities | |
| 4 | Other Illinois income tax withheld | |
| 5 | Total Illinois income tax withheld (sum of Lines 1–4) | |
| 6 | Total Illinois tax liability (from IL-1040) | |
| 7 | Balance due or (overpayment): Line 6 − Line 5 |
Example
Example: You worked for two employers and received a pension distribution. Employer A withheld $2,400, Employer B withheld $1,600, and your pension provider withheld $500. Your total Illinois tax withheld is $4,500. This total appears on Schedule IL-WIT Line 5 and is carried to Form IL-1040 Line 25.
Why Schedule IL-WIT Matters
Schedule IL-WIT protects you against under-crediting or disallowance of withholding. The Illinois Department of Revenue uses this form to match each withholding record to its corresponding payer, preventing refund delays or notices of discrepancy. It’s particularly valuable for taxpayers with complex income sources or those claiming withholding from partnerships or trusts.
Tips
- Ensure all SSNs and FEINs match the source documents.
- Do not include federal withholding; only Illinois state withholding applies here.
- Attach copies of all W-2s, 1099-Rs, and K-1s showing Illinois withholding.
- If you have Illinois and another state’s withholding, report each separately using Schedule 1299-DA for credits.
Last reviewed: 2025-11-07: If you believe this form requires an update, please contact us.
Related Forms and Resources
- Form IL-1040 – Individual Income Tax Return
- Schedule K-1-P – Partner’s Share of Income
- Schedule K-1-T – Beneficiary’s Share of Income
- Illinois DOR – Schedule IL-WIT
Quick Access Tools
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.