Illinois Schedule 1299-C – Recapture of Credits (2026)
Last reviewed: 2025-11-07
Use the Illinois Tax Form Calculator Schedule 1299-C: Recapture of Credits 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Schedule 1299-C is used to report and repay previously claimed Illinois tax credits that are no longer valid. This process, known as credit recapture, occurs when a taxpayer no longer meets the eligibility requirements tied to a credit — for example, selling property tied to the investment credit, moving a business out of Illinois, or ceasing qualified operations. The recaptured amount increases Illinois tax due on Form IL-1040.
When to File Schedule 1299-C
You must complete this schedule if, during 2026, you disposed of property, relocated operations, or otherwise triggered disqualification for a credit previously claimed on Schedule 1299-A or other Illinois credit forms. Examples include investment, EDGE, or high-impact business credits. It ensures the proper adjustment of credits and accurate computation of Illinois income tax.
How Credit Recapture Works
- Identify the credit type that is subject to recapture (e.g., investment credit, jobs credit, training credit).
- Determine the amount of the credit originally claimed and now disqualified.
- Multiply the disqualified portion by the recapture percentage required by the program (often 100% if property is disposed of early).
- Enter the recaptured amount on Line 4, which increases Illinois tax due for 2026.
Attach this schedule to your Form IL-1040 and retain documentation of how the recapture amount was determined. If the recapture relates to a business credit, supporting forms or calculations must accompany the return.
| 1 | Credit originally claimed in prior year(s) | |
| 2 | Amount disqualified or subject to recapture | |
| 3 | Recapture percentage (enter 100% if fully recaptured) | |
| 4 | Recaptured credit amount (Line 2 × Line 3%) | |
| 5 | Total Illinois tax due after recapture (Line 4 × 4.95%) |
Examples of Credit Recapture
Example 1 – Investment Credit Recapture: You claimed a $10,000 Illinois investment credit on machinery purchased in 2023. The machinery was sold in 2025, before the required holding period. You must recapture 100% of the credit ($10,000), which increases your 2025 Illinois tax by that amount.
Example 2 – EDGE Credit Recapture: A company relocates operations out of Illinois within the retention period of its Economic Development for a Growing Economy (EDGE) credit. The Department of Revenue requires full recapture of previously claimed credits for that year and prior years still within the lookback window.
Importance of Schedule 1299-C
Recapture ensures that Illinois tax credits remain fair and performance-based. It prevents misuse of state incentives while allowing legitimate businesses and individuals to maintain their benefits if compliance conditions are met. Completing this form correctly protects against audit penalties and maintains credibility for future credit eligibility.
Best Practices
- Keep detailed records of the assets or operations tied to any Illinois credits you claim.
- Monitor each credit’s retention or compliance period; premature disposal often triggers recapture.
- Coordinate with your accountant if you participate in multiple Illinois incentive programs to avoid overlapping credit reporting errors.
Last reviewed: 2025-11-07: If you believe this form requires an update, please contact us.
Related Forms and Resources
- Schedule 1299-A – Tax Subtraction and Credit Summary
- Form IL-1040 – Individual Income Tax Return
- Schedule M – Additions & Subtractions
- Schedule ICR – Illinois Credits
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Frequently Asked Questions
Do I need to file IL-1040-X if the IRS changes my income?
Yes. If the IRS adjusts your federal return and it affects Illinois tax, you must file IL-1040-X within 120 days of receiving the federal notice.
Are donations made through Schedule G-L tax-deductible?
Yes. Your Schedule G-L donations are eligible for a federal charitable deduction if you itemize on your federal Form 1040 Schedule A. Keep a copy of the filed schedule and any Lottery confirmation of your gift. The contribution will increase your Illinois payment or reduce your refund, but may lower your federal taxable income in the following year.
Changing jobs mid-year in IL
Update income/withholding and frequency; brackets are flat but credits/exemptions still matter.
Who must file Schedule FD?
You must file Schedule FD if you are a former Illinois resident who receives income (such as installment sale gains or deferred bonuses) sourced from Illinois that became taxable for federal purposes during 2026.
What documentation must accompany Schedule 1299-DA?
Attach copies of the other states’ filed tax returns, W-2s, or K-1s showing withholding and payments. Failure to attach proof can lead to denial of the credit. For convenience, you can track and upload copies directly through the MyTax Illinois portal.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.