Illinois Form IL-1040 Schedule CR – Credit for Tax Paid to Other States (2026)
Last reviewed: 2025-11-07
Use the Illinois Tax Form Calculator Form IL-1040 Schedule CR: Credit for Tax Paid to Other States 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 CR prevents double taxation by allowing Illinois residents and part-year residents to claim a credit for income tax paid to other states. You must complete this form if you reported out-of-state income on your federal return and that income is also taxable by Illinois. The computed credit carries to Form IL-1040, Line 16.
When to File Schedule CR
File Schedule CR if, during 2026, you earned wages or income in another state and that state required income-tax withholding or payment. This includes remote work, dual residency, and multi-state business activity. The credit is based on the lesser of Illinois tax due on that income or the actual tax paid to the other state.
How the Credit Works
The Illinois flat income-tax rate of 4.95% applies to all taxable income. When you compute the credit:
- Determine income taxed by both jurisdictions (Line 3).
- Multiply by the Illinois rate to calculate the Illinois tax on that income (Line 4).
- Enter the amount of tax actually paid to the other state (Line 5).
- The credit allowed (Line 6) is the lesser of Lines 4 or 5.
Attach copies of the other state’s return and proof of payment. Without supporting documents, the credit will be denied.
If you have income from more than one state, complete a separate Schedule CR for each and total them on Line 7. The total transfers to IL-1040.
| Step 1 – Identification | ||
| 1 | Name of other state(s) where tax was paid | |
| 2 | Type of income taxed by both states (wages, dividends, etc.) | |
| Step 2 – Credit Computation | ||
| 3 | Income taxed by both Illinois and the other state(s) | |
| 4 | Illinois tax rate (4.95%) × Line 3 | |
| 5 | Tax actually paid to the other state(s) on Line 3 income | |
| 6 | Credit allowable (lesser of Line 4 or Line 5) | |
| 7 | Total credit from all states (if more than one, attach detail) | |
| 8 | Enter total on Form IL-1040, Line 16 | |
Examples and Edge Cases
Example 1 – Dual-State Employment: An Illinois resident working remotely for an Iowa employer pays Iowa state tax on wages also taxed by Illinois. Line 3 lists the taxable Iowa wages, Line 5 the Iowa tax, and Line 6 calculates the lower of Illinois or Iowa tax. The result offsets part of Illinois liability.
Example 2 – Part-Year Move: A taxpayer relocates from Illinois to Missouri mid-year, paying both states on overlapping income. Schedule CR ensures only income earned while an Illinois resident is eligible for the credit. Cross-reference with Schedule NR.
Example 3 – Partnership Income: Illinois partners receiving K-1s showing taxes paid to another state must attach those K-1s and claim the credit through Schedule CR rather than a direct subtraction on Schedule M.
Tips for Compliance
- Keep signed copies of all out-of-state returns.
- Ensure the other state’s income corresponds exactly to that taxed by Illinois.
- Do not include local-city taxes; Schedule CR covers only state-level income tax.
Last reviewed: 2025-11-07: If you believe this form requires an update, please contact us.
Further Guidance and Related Forms
- Form IL-1040 – Individual Income Tax Return
- Schedule NR – Nonresident and Part-Year Resident
- Schedule M – Additions and Subtractions
For official reference, see the Illinois Schedule CR Instructions (2026) on the Illinois Department of Revenue website.
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Frequently Asked Questions
529 plan deduction (Bright Start/Bright Directions)?
Illinois allows a state deduction for contributions to its 529 plans (limits apply).
Can I amend to claim missed credits or deductions?
Yes. You may file IL-1040-X to add credits such as the Illinois Credits (Schedule ICR) or education expense credit you forgot to claim originally.
How can I verify that my donation reached the fund I chose?
After the filing season, each state agency receiving contributions issues a public report confirming the total received from taxpayers. You can also contact the Illinois Department of Revenue or the administering agency for that specific fund for confirmation. Keep a copy of your return and any receipt from your tax preparer or e-file provider showing your donation entry.
I paid tax to another state—can I avoid double taxation?
Yes. File Schedule CR to claim a credit for income tax paid to another U.S. state on the same income while an IL resident.
Why is Schedule 1299-C important for transparency?
It maintains fairness within Illinois’s incentive programs. By recapturing credits when eligibility changes, the state ensures that incentives reward long-term economic activity rather than short-term gains. For taxpayers, it preserves credibility and helps avoid legal disputes with the Department of Revenue.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.